Category Archives: Java

15
5月

POI와 Xpath를 JBoss5에서 사용시에 서버다운문제

Xpath를 먼저 사용후에 Poi호출시에 아래와 같이 스레드가 정지되는 … Continue reading →

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7
4月

long과 byte배열 변환팁

// long을 byte[]로 변환
ByteBuffer buf = ByteBuffer.allocate(8);
buf.putLong(123456789L);
byte[] result = buf.array();

// byte[]를 long으로 변환
byte[] bytes = {0, 0, 0, 0, (byte)7, (byte)91, (byte)205, (byte)21};
ByteBuffer buf = ByteBuffer.wrap(bytes);
long longValue = buf.getLong();

// long을 byte[]로 변환

ByteBuffer buf = ByteBuffer.allocate(8);

buf.putLong(123456789L);

byte[] result = buf.array();

// byte[]를 long으로 변환

byte[] bytes = {0, 0, 0, 0, (byte)7, (byte)91, (byte)205, (byte)21};

ByteBuffer buf = ByteBuffer.wrap(bytes);

long longValue = buf.getLong();

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7
4月

OpenID Connect jwk에 대해서

https://tools.ietf.org/html/draft-ietf-j … Continue reading →

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22
2月

Google Authenticator 샘플

import java.nio.ByteBuffer;
import java.security.SecureRandom;
import java.util.ArrayList;
import java.util.List;

import javax.crypto.Mac;
import javax.crypto.spec.SecretKeySpec;

/**
 * https://tools.ietf.org/html/rfc6238
 * https://weblogs.java.net/blog/evanx/archive/2012/11/07/google-authenticator-thus-enabled
 */
public class TOTP {

	static String encodedKey;

	public static String getQRBarcodeURL(String user, String host, String secret) {
		String format = "https://www.google.com/chart?chs=200x200&chld=M%%7C0&cht=qr&chl=otpauth://totp/%s@%s%%3Fsecret%%3D%s";
		return String.format(format, user, host, secret);
	}

	public static void main(String[] args) throws Exception {
		byte[] secretKey = new byte[10];
		new SecureRandom().nextBytes(secretKey);

		encodedKey = Base32.encodeRfc(secretKey);
		System.out.println("secret => " + encodedKey);
		System.out.println(getQRBarcodeURL("jo.27", "acekorea.info", encodedKey));

		long X = 30;
		long T0 = 0;
		long t = (System.currentTimeMillis() - T0) / 1000 / X;
		System.out.println(getCode(encodedKey, t));
		System.out.println(getCodeList(encodedKey, t, 5));
	}

	public static boolean verifyCode(String secret, int code, long timeIndex,
			int variance) throws Exception {
		byte[] secretBytes = Base32.decodeRfc(secret);
		for (int i = -variance; i <= variance; i++) {
			if (getCode(secretBytes, timeIndex + i) == code) {
				return true;
			}
		}
		return false;
	}

	private static long getCode(byte[] secret, long timeIndex) throws Exception {
		SecretKeySpec signKey = new SecretKeySpec(secret, "HmacSHA1");
		ByteBuffer buffer = ByteBuffer.allocate(8);
		buffer.putLong(timeIndex);
		byte[] timeBytes = buffer.array();
		Mac mac = Mac.getInstance("HmacSHA1");
		mac.init(signKey);
		byte[] hash = mac.doFinal(timeBytes);
		int offset = hash[19] & 0xf;
		long truncatedHash = hash[offset] & 0x7f;
		for (int i = 1; i < 4; i++) {
			truncatedHash <<= 8;
			truncatedHash |= hash[offset + i] & 0xff;
		}
		return (truncatedHash %= 1000000);
	}

	static long getCode(String secret, long timeIndex) throws Exception {
		return getCode(Base32.decodeRfc(secret), timeIndex);
	}

	static List getCodeList(String secret, long timeIndex, int variance) throws Exception {
		List list = new ArrayList();
		for (int i = -variance; i <= variance; i++) {
			list.add(getCode(secret, timeIndex + i));
		}
		return list;
	}
}

import java.nio.ByteBuffer;

import java.security.SecureRandom;

import java.util.ArrayList;

import java.util.List;

import javax.crypto.Mac;

import javax.crypto.spec.SecretKeySpec;

/**

* https://tools.ietf.org/html/rfc6238

* https://weblogs.java.net/blog/evanx/archive/2012/11/07/google-authenticator-thus-enabled

public class TOTP {

static String encodedKey;

public static String getQRBarcodeURL(String user, String host, String secret) {

String format = "https://www.google.com/chart?chs=200x200&chld=M%%7C0&cht=qr&chl=otpauth://totp/%s@%s%%3Fsecret%%3D%s";

return String.format(format, user, host, secret);

}

public static void main(String[] args) throws Exception {

byte[] secretKey = new byte[10];

new SecureRandom().nextBytes(secretKey);

encodedKey = Base32.encodeRfc(secretKey);

System.out.println("secret => " + encodedKey);

System.out.println(getQRBarcodeURL("jo.27", "acekorea.info", encodedKey));

long X = 30;

long T0 = 0;

long t = (System.currentTimeMillis() - T0) / 1000 / X;

System.out.println(getCode(encodedKey, t));

System.out.println(getCodeList(encodedKey, t, 5));

}

public static boolean verifyCode(String secret, int code, long timeIndex,

int variance) throws Exception {

byte[] secretBytes = Base32.decodeRfc(secret);

for (int i = -variance; i <= variance; i++) {

if (getCode(secretBytes, timeIndex + i) == code) {

return true;

}

return false;

}

private static long getCode(byte[] secret, long timeIndex) throws Exception {

SecretKeySpec signKey = new SecretKeySpec(secret, "HmacSHA1");

ByteBuffer buffer = ByteBuffer.allocate(8);

buffer.putLong(timeIndex);

byte[] timeBytes = buffer.array();

Mac mac = Mac.getInstance("HmacSHA1");

mac.init(signKey);

byte[] hash = mac.doFinal(timeBytes);

int offset = hash[19] & 0xf;

long truncatedHash = hash[offset] & 0x7f;

for (int i = 1; i < 4; i++) {

truncatedHash <<= 8;

truncatedHash |= hash[offset + i] & 0xff;

}

return (truncatedHash %= 1000000);

}

static long getCode(String secret, long timeIndex) throws Exception {

return getCode(Base32.decodeRfc(secret), timeIndex);

}

static List getCodeList(String secret, long timeIndex, int variance) throws Exception {

List list = new ArrayList();

for (int i = -variance; i <= variance; i++) {

list.add(getCode(secret, timeIndex + i));

}

return list;

}

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2
11月

vmstat를 jfreechart로 그래프화

import java.awt.Color;
import java.awt.Font;
import java.io.BufferedReader;
import java.io.File;
import java.io.FileInputStream;
import java.io.IOException;
import java.io.InputStreamReader;
import java.io.Serializable;
import java.text.SimpleDateFormat;
import java.util.ArrayList;
import java.util.Calendar;
import java.util.Date;
import java.util.List;

import org.jfree.chart.ChartFactory;
import org.jfree.chart.ChartUtilities;
import org.jfree.chart.JFreeChart;
import org.jfree.chart.StandardChartTheme;
import org.jfree.chart.axis.DateAxis;
import org.jfree.chart.axis.NumberAxis;
import org.jfree.chart.plot.CombinedDomainXYPlot;
import org.jfree.chart.plot.XYPlot;
import org.jfree.chart.renderer.xy.StandardXYItemRenderer;
import org.jfree.chart.title.LegendTitle;
import org.jfree.data.time.Millisecond;
import org.jfree.data.time.TimeSeries;
import org.jfree.data.time.TimeSeriesCollection;

public class GraphForVmstat {

	static String workDir;
	static List<Journal> alls = new ArrayList<Journal>();

	static int interval = 10; // second
	static SimpleDateFormat sdf = new SimpleDateFormat("yy/MM/ddHH:mm:ss");

	static class Journal implements Serializable {

		private static final long serialVersionUID = -3906379676663036836L;

		private String timestampString;
		private Date timestamp;
		private int r;
		private int b;
		private int swpd;
		private int free;
		private int buff;
		private int cache;
		private int si;
		private int so;
		private int bi;
		private int bo;
		private int in;
		private int cs;
		private int us;
		private int sy;
		private int id;
		private int wa;
		private int st;

		public Journal(String timestamp) {
			try {
				this.timestamp = sdf.parse(timestamp);
			} catch (Exception e) {
				throw new RuntimeException(e);
			}
			this.timestampString = timestamp;
		}

		public Journal(Date timestamp) {
			this.timestamp = timestamp;
			this.timestampString = sdf.format(timestamp);
		}
	}

	public static List<Journal> readFile(String file) throws Exception {
		long started = System.currentTimeMillis();
		System.out.println("Open " + file);
		List<Journal> result = new ArrayList<Journal>();
		BufferedReader br = new BufferedReader(new InputStreamReader(new FileInputStream(file)));
		String[] tokens = null;
		String line = null;
		Journal j = null;
		int row = 0;
		int journalCount = 0;
		long lastTimed = System.currentTimeMillis();
		Calendar timestamp = Calendar.getInstance();
		while ((line = br.readLine()) != null) {

			row++;
			if (row % 100000 == 0) {
				System.out.println(row + " line(s) buffered. (memory " + (Runtime.getRuntime().freeMemory() * 100 / Runtime.getRuntime().maxMemory()) + "% used) " + (System.currentTimeMillis() - lastTimed) + "ms");
				lastTimed = System.currentTimeMillis();
			}
			if (line.trim().length() == 0)
				continue;

			line = line.trim();
			if (line.contains("procs") || line.contains("r  b swpd")) {
				// header line
				continue;
			} else {
				if (line.length() < 3) {
					continue;
				}
				// valid line
				if (line.charAt(2) == '/') {
					// timestamp付き
					timestamp.setTime(sdf.parse(line.substring(0, 17)));
					line = line.substring(17).trim();
				}

				// data field
				List<String> buffers = new ArrayList<String>();
				StringBuffer outB = new StringBuffer();
				for (int i = 0; i < line.length(); i++) {
					if (line.charAt(i) != ' ') {
						outB.append(line.charAt(i));
					} else {
						if (outB.length() > 0) {
							buffers.add(outB.toString());
							outB = new StringBuffer();
						}
					}
				}
				if (outB.length() > 0) {
					buffers.add(outB.toString());
				}
				tokens = buffers.toArray(new String[] {});
				j = new Journal(timestamp.getTime());
				timestamp.add(Calendar.SECOND, interval);
				try {
					j.r = toInt(tokens[0]);
					j.b = toInt(tokens[1]);
					j.swpd = toInt(tokens[2]);
					j.free = toInt(tokens[3]);
					j.buff = toInt(tokens[4]);
					j.cache = toInt(tokens[5]);
					j.si = toInt(tokens[6]);
					j.so = toInt(tokens[7]);
					j.bi = toInt(tokens[8]);
					j.bo = toInt(tokens[9]);
					j.in = toInt(tokens[10]);
					j.cs = toInt(tokens[11]);
					j.us = toInt(tokens[12]);
					j.sy = toInt(tokens[13]);
					j.id = toInt(tokens[14]);
					j.wa = toInt(tokens[15]);
					j.st = toInt(tokens[16]);

					// //////////////////
					// 追加
					// //////////////////
					result.add(j);
					journalCount++;

				} catch (Exception e) {
					System.err.println("line " + row + "(tokens=" + tokens.length + ") : " + line);
					for (int i = 0; i < tokens.length; i++) {
						System.err.println("token[" + i + "]=[" + tokens[i] + "]");
					}
					e.printStackTrace();
					System.exit(1);
				}

			}
		}

		br.close();
		System.out.println("completed. (" + (System.currentTimeMillis() - started) + "ms, " + row + "rows)");
		return result;
	}

	public static double toDouble(String v) {
		return Double.parseDouble(v);
	}

	public static int toInt(String v) {
		return Integer.parseInt(v);
	}

	public static List<String> getFiles(String path) {
		List<String> files = new ArrayList<String>();
		File f = new File(path);
		File f2 = null;
		for (String name : f.list()) {
			f2 = new File(path + "\\" + name);
			if (f2.isDirectory()) {
				files.addAll(getFiles(f2.getAbsolutePath()));
			} else {
				files.add(f2.getAbsolutePath());
			}
		}
		return files;
	}

	public static void main(String[] args) throws Exception {

		File file = new File("C:\\vmstat.txt");
		workDir = file.getParentFile().getAbsolutePath() + "\\" + file.getName() + ".output";
		File outputDir = new File(workDir);
		if (!outputDir.exists()) {
			if (!outputDir.mkdirs()) {
				System.err.println(workDir + " could not created.");
				System.exit(1);
			}
		}
		List<String> files = new ArrayList<String>();
		if (file.isDirectory()) {
			files.addAll(getFiles(file.getAbsolutePath()));
		} else {
			files.add(file.getAbsolutePath());
		}

		for (String filename : files) {
			alls.addAll(readFile(filename));
		}

		// ////////////////////////////////////////////////////////////////////
		// Graph
		// ////////////////////////////////////////////////////////////////////
		ChartFactory.setChartTheme(StandardChartTheme.createLegacyTheme());
		makeGraph();
	}

	static void makeGraph() throws Exception {

		CombinedDomainXYPlot plot = new CombinedDomainXYPlot(new DateAxis("Time"));
		plot.setBackgroundPaint(Color.white);
		plot.setDomainGridlinePaint(Color.black);
		plot.setRangeGridlinePaint(Color.black);
		plot.setForegroundAlpha(0.5f);
		plot.setBackgroundAlpha(0.5f);

		TimeSeriesCollection dataset1 = new TimeSeriesCollection();
		dataset1.addSeries(new TimeSeries("Requested", Millisecond.class));
		dataset1.addSeries(new TimeSeries("Blocked", Millisecond.class));

		TimeSeriesCollection dataset2 = new TimeSeriesCollection();
		dataset2.addSeries(new TimeSeries("spwd", Millisecond.class));
		dataset2.addSeries(new TimeSeries("free", Millisecond.class));
		dataset2.addSeries(new TimeSeries("buff", Millisecond.class));
		dataset2.addSeries(new TimeSeries("cache", Millisecond.class));

		TimeSeriesCollection dataset3 = new TimeSeriesCollection();
		dataset3.addSeries(new TimeSeries("si", Millisecond.class));
		dataset3.addSeries(new TimeSeries("so", Millisecond.class));

		TimeSeriesCollection dataset4 = new TimeSeriesCollection();
		dataset4.addSeries(new TimeSeries("bi", Millisecond.class));
		dataset4.addSeries(new TimeSeries("bo", Millisecond.class));

		TimeSeriesCollection dataset5 = new TimeSeriesCollection();
		dataset5.addSeries(new TimeSeries("in", Millisecond.class));
		dataset5.addSeries(new TimeSeries("cs", Millisecond.class));

		TimeSeriesCollection dataset6 = new TimeSeriesCollection();
		dataset6.addSeries(new TimeSeries("us", Millisecond.class));
		dataset6.addSeries(new TimeSeries("sy", Millisecond.class));
		dataset6.addSeries(new TimeSeries("wa", Millisecond.class));
		dataset6.addSeries(new TimeSeries("st", Millisecond.class));

		NumberAxis axisY1 = new NumberAxis("Count");
		NumberAxis axisY2 = new NumberAxis("byte");
		NumberAxis axisY3 = new NumberAxis("Count");
		NumberAxis axisY4 = new NumberAxis("Count");
		NumberAxis axisY5 = new NumberAxis("Count");
		NumberAxis axisY6 = new NumberAxis("%");
		axisY6.setAutoRangeIncludesZero(false);
		axisY6.setRange(0, 100);

		XYPlot subplot1 = new XYPlot(dataset1, null, axisY1, new StandardXYItemRenderer());
		subplot1.setBackgroundPaint(Color.white);
		subplot1.setDomainGridlinePaint(Color.DARK_GRAY);
		subplot1.setRangeGridlinePaint(Color.DARK_GRAY);
		plot.add(subplot1);
		subplot1.getRenderer().setSeriesStroke(0, new java.awt.BasicStroke(2));
		subplot1.getRenderer().setSeriesStroke(1, new java.awt.BasicStroke(2));

		XYPlot subplot2 = new XYPlot(dataset2, null, axisY2, new StandardXYItemRenderer());
		subplot2.setBackgroundPaint(Color.white);
		subplot2.setDomainGridlinePaint(Color.DARK_GRAY);
		subplot2.setRangeGridlinePaint(Color.DARK_GRAY);
		plot.add(subplot2);
		subplot2.getRenderer().setSeriesStroke(0, new java.awt.BasicStroke(2));
		subplot2.getRenderer().setSeriesStroke(1, new java.awt.BasicStroke(2));
		subplot2.getRenderer().setSeriesStroke(2, new java.awt.BasicStroke(2));
		subplot2.getRenderer().setSeriesStroke(3, new java.awt.BasicStroke(2));

		XYPlot subplot3 = new XYPlot(dataset3, null, axisY3, new StandardXYItemRenderer());
		subplot3.setBackgroundPaint(Color.white);
		subplot3.setDomainGridlinePaint(Color.DARK_GRAY);
		subplot3.setRangeGridlinePaint(Color.DARK_GRAY);
		plot.add(subplot3);
		subplot3.getRenderer().setSeriesStroke(0, new java.awt.BasicStroke(2));
		subplot3.getRenderer().setSeriesStroke(1, new java.awt.BasicStroke(2));

		XYPlot subplot4 = new XYPlot(dataset4, null, axisY4, new StandardXYItemRenderer());
		subplot4.setBackgroundPaint(Color.white);
		subplot4.setDomainGridlinePaint(Color.DARK_GRAY);
		subplot4.setRangeGridlinePaint(Color.DARK_GRAY);
		plot.add(subplot4);
		subplot4.getRenderer().setSeriesStroke(0, new java.awt.BasicStroke(2));
		subplot4.getRenderer().setSeriesStroke(1, new java.awt.BasicStroke(2));

		XYPlot subplot5 = new XYPlot(dataset5, null, axisY5, new StandardXYItemRenderer());
		subplot5.setBackgroundPaint(Color.white);
		subplot5.setDomainGridlinePaint(Color.DARK_GRAY);
		subplot5.setRangeGridlinePaint(Color.DARK_GRAY);
		plot.add(subplot5);
		subplot5.getRenderer().setSeriesStroke(0, new java.awt.BasicStroke(2));
		subplot5.getRenderer().setSeriesStroke(1, new java.awt.BasicStroke(2));

		XYPlot subplot6 = new XYPlot(dataset6, null, axisY6, new StandardXYItemRenderer());
		subplot6.setBackgroundPaint(Color.white);
		subplot6.setDomainGridlinePaint(Color.DARK_GRAY);
		subplot6.setRangeGridlinePaint(Color.DARK_GRAY);
		plot.add(subplot6);
		subplot6.getRenderer().setSeriesStroke(0, new java.awt.BasicStroke(2));
		subplot6.getRenderer().setSeriesStroke(1, new java.awt.BasicStroke(2));
		subplot6.getRenderer().setSeriesStroke(2, new java.awt.BasicStroke(2));
		subplot6.getRenderer().setSeriesStroke(3, new java.awt.BasicStroke(2));

		for (Journal j : alls) {
			try {
				dataset1.getSeries(0).add(new Millisecond(j.timestamp), j.r);
				dataset1.getSeries(1).add(new Millisecond(j.timestamp), j.b);
			} catch (org.jfree.data.general.SeriesException duplicated) {
			}
			try {
				dataset2.getSeries(0).add(new Millisecond(j.timestamp), j.swpd);
				dataset2.getSeries(1).add(new Millisecond(j.timestamp), j.free);
				dataset2.getSeries(2).add(new Millisecond(j.timestamp), j.buff);
				dataset2.getSeries(3).add(new Millisecond(j.timestamp), j.cache);
			} catch (org.jfree.data.general.SeriesException duplicated) {
			}
			try {
				dataset3.getSeries(0).add(new Millisecond(j.timestamp), j.si);
				dataset3.getSeries(1).add(new Millisecond(j.timestamp), j.so);
			} catch (org.jfree.data.general.SeriesException duplicated) {
			}
			try {
				dataset4.getSeries(0).add(new Millisecond(j.timestamp), j.bi);
				dataset4.getSeries(1).add(new Millisecond(j.timestamp), j.bo);
			} catch (org.jfree.data.general.SeriesException duplicated) {
			}
			try {
				dataset5.getSeries(0).add(new Millisecond(j.timestamp), j.in);
				dataset5.getSeries(1).add(new Millisecond(j.timestamp), j.cs);
			} catch (org.jfree.data.general.SeriesException duplicated) {
			}
			try {
				dataset6.getSeries(0).add(new Millisecond(j.timestamp), j.us);
				dataset6.getSeries(1).add(new Millisecond(j.timestamp), j.sy);
				dataset6.getSeries(2).add(new Millisecond(j.timestamp), j.wa);
				dataset6.getSeries(3).add(new Millisecond(j.timestamp), j.st);
			} catch (org.jfree.data.general.SeriesException duplicated) {
			}
		}

		XYPlot[] subplots = new XYPlot[6];
		subplots[0] = subplot1;
		subplots[1] = subplot2;
		subplots[2] = subplot3;
		subplots[3] = subplot4;
		subplots[4] = subplot5;
		subplots[5] = subplot6;

		String[] titles = new String[] { "Requested/Blocked", "OS Memory", "Swap I/O", "Block I/O", "Interrupt/Context Switches", "CPU Usage" };
		String[] filenames = new String[] { "vmstat_rb", "vmstat_memory", "vmstat_swap", "vmstat_block", "vmstat_cs", "vmstat_cpu" };

		for (int i = 0; i < subplots.length; i++) {

			plot = new CombinedDomainXYPlot(new DateAxis("Time"));
			plot.setBackgroundPaint(Color.white);
			plot.setDomainGridlinePaint(Color.black);
			plot.setRangeGridlinePaint(Color.black);
			plot.setForegroundAlpha(0.5f);
			plot.setBackgroundAlpha(0.5f);
			plot.add(subplots[i]);

			// SAVE GRAPH
			JFreeChart chart = new JFreeChart(titles[i], plot);
			chart.setBorderPaint(Color.black);
			chart.setBorderVisible(true);
			chart.setBackgroundPaint(Color.white);
			chart.getTitle().setFont(new Font("Meiryo UI", 1, 22));

			// 凡例
			LegendTitle legend = chart.getLegend();
			legend.setBackgroundPaint(Color.white);
			legend.setMargin(10d, 10d, 10d, 10d);
			legend.setItemFont(new Font("Meiryo UI", 1, 12));

			// save
			File pngFile = new File(workDir + "\\" + filenames[i] + ".png");
			try {
				ChartUtilities.saveChartAsPNG(pngFile, chart, 600, 400);
			} catch (IOException e) {
				e.printStackTrace();
			}
		}

	}

}

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import java.awt.Color;

import java.awt.Font;

import java.io.BufferedReader;

import java.io.File;

import java.io.FileInputStream;

import java.io.IOException;

import java.io.InputStreamReader;

import java.io.Serializable;

import java.text.SimpleDateFormat;

import java.util.ArrayList;

import java.util.Calendar;

import java.util.Date;

import java.util.List;

import org.jfree.chart.ChartFactory;

import org.jfree.chart.ChartUtilities;

import org.jfree.chart.JFreeChart;

import org.jfree.chart.StandardChartTheme;

import org.jfree.chart.axis.DateAxis;

import org.jfree.chart.axis.NumberAxis;

import org.jfree.chart.plot.CombinedDomainXYPlot;

import org.jfree.chart.plot.XYPlot;

import org.jfree.chart.renderer.xy.StandardXYItemRenderer;

import org.jfree.chart.title.LegendTitle;

import org.jfree.data.time.Millisecond;

import org.jfree.data.time.TimeSeries;

import org.jfree.data.time.TimeSeriesCollection;

public class GraphForVmstat {

static String workDir;

static List<Journal> alls = new ArrayList<Journal>();

static int interval = 10; // second

static SimpleDateFormat sdf = new SimpleDateFormat("yy/MM/ddHH:mm:ss");

static class Journal implements Serializable {

private static final long serialVersionUID = -3906379676663036836L;

private String timestampString;

private Date timestamp;

private int r;

private int b;

private int swpd;

private int free;

private int buff;

private int cache;

private int si;

private int so;

private int bi;

private int bo;

private int in;

private int cs;

private int us;

private int sy;

private int id;

private int wa;

private int st;

public Journal(String timestamp) {

try {

this.timestamp = sdf.parse(timestamp);

} catch (Exception e) {

throw new RuntimeException(e);

}

this.timestampString = timestamp;

}

public Journal(Date timestamp) {

this.timestamp = timestamp;

this.timestampString = sdf.format(timestamp);

}

public static List<Journal> readFile(String file) throws Exception {

long started = System.currentTimeMillis();

System.out.println("Open " + file);

List<Journal> result = new ArrayList<Journal>();

BufferedReader br = new BufferedReader(new InputStreamReader(new FileInputStream(file)));

String[] tokens = null;

String line = null;

Journal j = null;

int row = 0;

int journalCount = 0;

long lastTimed = System.currentTimeMillis();

Calendar timestamp = Calendar.getInstance();

while ((line = br.readLine()) != null) {

row++;

if (row % 100000 == 0) {

System.out.println(row + " line(s) buffered. (memory " + (Runtime.getRuntime().freeMemory() * 100 / Runtime.getRuntime().maxMemory()) + "% used) " + (System.currentTimeMillis() - lastTimed) + "ms");

lastTimed = System.currentTimeMillis();

}

if (line.trim().length() == 0)

continue;

line = line.trim();

if (line.contains("procs") || line.contains("r b swpd")) {

// header line

continue;

} else {

if (line.length() < 3) {

continue;

}

// valid line

if (line.charAt(2) == '/') {

// timestamp付き

timestamp.setTime(sdf.parse(line.substring(0, 17)));

line = line.substring(17).trim();

}

// data field

List<String> buffers = new ArrayList<String>();

StringBuffer outB = new StringBuffer();

for (int i = 0; i < line.length(); i++) {

if (line.charAt(i) != ' ') {

outB.append(line.charAt(i));

} else {

if (outB.length() > 0) {

buffers.add(outB.toString());

outB = new StringBuffer();

}

if (outB.length() > 0) {

buffers.add(outB.toString());

}

tokens = buffers.toArray(new String[] {});

j = new Journal(timestamp.getTime());

timestamp.add(Calendar.SECOND, interval);

try {

j.r = toInt(tokens[0]);

j.b = toInt(tokens[1]);

j.swpd = toInt(tokens[2]);

j.free = toInt(tokens[3]);

j.buff = toInt(tokens[4]);

j.cache = toInt(tokens[5]);

j.si = toInt(tokens[6]);

j.so = toInt(tokens[7]);

j.bi = toInt(tokens[8]);

j.bo = toInt(tokens[9]);

j.in = toInt(tokens[10]);

j.cs = toInt(tokens[11]);

j.us = toInt(tokens[12]);

j.sy = toInt(tokens[13]);

j.id = toInt(tokens[14]);

j.wa = toInt(tokens[15]);

j.st = toInt(tokens[16]);

// //////////////////

// 追加

// //////////////////

result.add(j);

journalCount++;

} catch (Exception e) {

System.err.println("line " + row + "(tokens=" + tokens.length + ") : " + line);

for (int i = 0; i < tokens.length; i++) {

System.err.println("token[" + i + "]=[" + tokens[i] + "]");

}

e.printStackTrace();

System.exit(1);

}

br.close();

System.out.println("completed. (" + (System.currentTimeMillis() - started) + "ms, " + row + "rows)");

return result;

}

public static double toDouble(String v) {

return Double.parseDouble(v);

}

public static int toInt(String v) {

return Integer.parseInt(v);

}

public static List<String> getFiles(String path) {

List<String> files = new ArrayList<String>();

File f = new File(path);

File f2 = null;

for (String name : f.list()) {

f2 = new File(path + "\\" + name);

if (f2.isDirectory()) {

files.addAll(getFiles(f2.getAbsolutePath()));

} else {

files.add(f2.getAbsolutePath());

}

return files;

}

public static void main(String[] args) throws Exception {

File file = new File("C:\\vmstat.txt");

workDir = file.getParentFile().getAbsolutePath() + "\\" + file.getName() + ".output";

File outputDir = new File(workDir);

if (!outputDir.exists()) {

if (!outputDir.mkdirs()) {

System.err.println(workDir + " could not created.");

System.exit(1);

}

List<String> files = new ArrayList<String>();

if (file.isDirectory()) {

files.addAll(getFiles(file.getAbsolutePath()));

} else {

files.add(file.getAbsolutePath());

}

for (String filename : files) {

alls.addAll(readFile(filename));

}

// ////////////////////////////////////////////////////////////////////

// Graph

// ////////////////////////////////////////////////////////////////////

ChartFactory.setChartTheme(StandardChartTheme.createLegacyTheme());

makeGraph();

}

static void makeGraph() throws Exception {

CombinedDomainXYPlot plot = new CombinedDomainXYPlot(new DateAxis("Time"));

plot.setBackgroundPaint(Color.white);

plot.setDomainGridlinePaint(Color.black);

plot.setRangeGridlinePaint(Color.black);

plot.setForegroundAlpha(0.5f);

plot.setBackgroundAlpha(0.5f);

TimeSeriesCollection dataset1 = new TimeSeriesCollection();

dataset1.addSeries(new TimeSeries("Requested", Millisecond.class));

dataset1.addSeries(new TimeSeries("Blocked", Millisecond.class));

TimeSeriesCollection dataset2 = new TimeSeriesCollection();

dataset2.addSeries(new TimeSeries("spwd", Millisecond.class));

dataset2.addSeries(new TimeSeries("free", Millisecond.class));

dataset2.addSeries(new TimeSeries("buff", Millisecond.class));

dataset2.addSeries(new TimeSeries("cache", Millisecond.class));

TimeSeriesCollection dataset3 = new TimeSeriesCollection();

dataset3.addSeries(new TimeSeries("si", Millisecond.class));

dataset3.addSeries(new TimeSeries("so", Millisecond.class));

TimeSeriesCollection dataset4 = new TimeSeriesCollection();

dataset4.addSeries(new TimeSeries("bi", Millisecond.class));

dataset4.addSeries(new TimeSeries("bo", Millisecond.class));

TimeSeriesCollection dataset5 = new TimeSeriesCollection();

dataset5.addSeries(new TimeSeries("in", Millisecond.class));

dataset5.addSeries(new TimeSeries("cs", Millisecond.class));

TimeSeriesCollection dataset6 = new TimeSeriesCollection();

dataset6.addSeries(new TimeSeries("us", Millisecond.class));

dataset6.addSeries(new TimeSeries("sy", Millisecond.class));

dataset6.addSeries(new TimeSeries("wa", Millisecond.class));

dataset6.addSeries(new TimeSeries("st", Millisecond.class));

NumberAxis axisY1 = new NumberAxis("Count");

NumberAxis axisY2 = new NumberAxis("byte");

NumberAxis axisY3 = new NumberAxis("Count");

NumberAxis axisY4 = new NumberAxis("Count");

NumberAxis axisY5 = new NumberAxis("Count");

NumberAxis axisY6 = new NumberAxis("%");

axisY6.setAutoRangeIncludesZero(false);

axisY6.setRange(0, 100);

XYPlot subplot1 = new XYPlot(dataset1, null, axisY1, new StandardXYItemRenderer());

subplot1.setBackgroundPaint(Color.white);

subplot1.setDomainGridlinePaint(Color.DARK_GRAY);

subplot1.setRangeGridlinePaint(Color.DARK_GRAY);

plot.add(subplot1);

subplot1.getRenderer().setSeriesStroke(0, new java.awt.BasicStroke(2));

subplot1.getRenderer().setSeriesStroke(1, new java.awt.BasicStroke(2));

XYPlot subplot2 = new XYPlot(dataset2, null, axisY2, new StandardXYItemRenderer());

subplot2.setBackgroundPaint(Color.white);

subplot2.setDomainGridlinePaint(Color.DARK_GRAY);

subplot2.setRangeGridlinePaint(Color.DARK_GRAY);

plot.add(subplot2);

subplot2.getRenderer().setSeriesStroke(0, new java.awt.BasicStroke(2));

subplot2.getRenderer().setSeriesStroke(1, new java.awt.BasicStroke(2));

subplot2.getRenderer().setSeriesStroke(2, new java.awt.BasicStroke(2));

subplot2.getRenderer().setSeriesStroke(3, new java.awt.BasicStroke(2));

XYPlot subplot3 = new XYPlot(dataset3, null, axisY3, new StandardXYItemRenderer());

subplot3.setBackgroundPaint(Color.white);

subplot3.setDomainGridlinePaint(Color.DARK_GRAY);

subplot3.setRangeGridlinePaint(Color.DARK_GRAY);

plot.add(subplot3);

subplot3.getRenderer().setSeriesStroke(0, new java.awt.BasicStroke(2));

subplot3.getRenderer().setSeriesStroke(1, new java.awt.BasicStroke(2));

XYPlot subplot4 = new XYPlot(dataset4, null, axisY4, new StandardXYItemRenderer());

subplot4.setBackgroundPaint(Color.white);

subplot4.setDomainGridlinePaint(Color.DARK_GRAY);

subplot4.setRangeGridlinePaint(Color.DARK_GRAY);

plot.add(subplot4);

subplot4.getRenderer().setSeriesStroke(0, new java.awt.BasicStroke(2));

subplot4.getRenderer().setSeriesStroke(1, new java.awt.BasicStroke(2));

XYPlot subplot5 = new XYPlot(dataset5, null, axisY5, new StandardXYItemRenderer());

subplot5.setBackgroundPaint(Color.white);

subplot5.setDomainGridlinePaint(Color.DARK_GRAY);

subplot5.setRangeGridlinePaint(Color.DARK_GRAY);

plot.add(subplot5);

subplot5.getRenderer().setSeriesStroke(0, new java.awt.BasicStroke(2));

subplot5.getRenderer().setSeriesStroke(1, new java.awt.BasicStroke(2));

XYPlot subplot6 = new XYPlot(dataset6, null, axisY6, new StandardXYItemRenderer());

subplot6.setBackgroundPaint(Color.white);

subplot6.setDomainGridlinePaint(Color.DARK_GRAY);

subplot6.setRangeGridlinePaint(Color.DARK_GRAY);

plot.add(subplot6);

subplot6.getRenderer().setSeriesStroke(0, new java.awt.BasicStroke(2));

subplot6.getRenderer().setSeriesStroke(1, new java.awt.BasicStroke(2));

subplot6.getRenderer().setSeriesStroke(2, new java.awt.BasicStroke(2));

subplot6.getRenderer().setSeriesStroke(3, new java.awt.BasicStroke(2));

for (Journal j : alls) {

try {

dataset1.getSeries(0).add(new Millisecond(j.timestamp), j.r);

dataset1.getSeries(1).add(new Millisecond(j.timestamp), j.b);

} catch (org.jfree.data.general.SeriesException duplicated) {

}

try {

dataset2.getSeries(0).add(new Millisecond(j.timestamp), j.swpd);

dataset2.getSeries(1).add(new Millisecond(j.timestamp), j.free);

dataset2.getSeries(2).add(new Millisecond(j.timestamp), j.buff);

dataset2.getSeries(3).add(new Millisecond(j.timestamp), j.cache);

} catch (org.jfree.data.general.SeriesException duplicated) {

}

try {

dataset3.getSeries(0).add(new Millisecond(j.timestamp), j.si);

dataset3.getSeries(1).add(new Millisecond(j.timestamp), j.so);

} catch (org.jfree.data.general.SeriesException duplicated) {

}

try {

dataset4.getSeries(0).add(new Millisecond(j.timestamp), j.bi);

dataset4.getSeries(1).add(new Millisecond(j.timestamp), j.bo);

} catch (org.jfree.data.general.SeriesException duplicated) {

}

try {

dataset5.getSeries(0).add(new Millisecond(j.timestamp), j.in);

dataset5.getSeries(1).add(new Millisecond(j.timestamp), j.cs);

} catch (org.jfree.data.general.SeriesException duplicated) {

}

try {

dataset6.getSeries(0).add(new Millisecond(j.timestamp), j.us);

dataset6.getSeries(1).add(new Millisecond(j.timestamp), j.sy);

dataset6.getSeries(2).add(new Millisecond(j.timestamp), j.wa);

dataset6.getSeries(3).add(new Millisecond(j.timestamp), j.st);

} catch (org.jfree.data.general.SeriesException duplicated) {

}

XYPlot[] subplots = new XYPlot[6];

subplots[0] = subplot1;

subplots[1] = subplot2;

subplots[2] = subplot3;

subplots[3] = subplot4;

subplots[4] = subplot5;

subplots[5] = subplot6;

String[] titles = new String[] { "Requested/Blocked", "OS Memory", "Swap I/O", "Block I/O", "Interrupt/Context Switches", "CPU Usage" };

String[] filenames = new String[] { "vmstat_rb", "vmstat_memory", "vmstat_swap", "vmstat_block", "vmstat_cs", "vmstat_cpu" };

for (int i = 0; i < subplots.length; i++) {

plot = new CombinedDomainXYPlot(new DateAxis("Time"));

plot.setBackgroundPaint(Color.white);

plot.setDomainGridlinePaint(Color.black);

plot.setRangeGridlinePaint(Color.black);

plot.setForegroundAlpha(0.5f);

plot.setBackgroundAlpha(0.5f);

plot.add(subplots[i]);

// SAVE GRAPH

JFreeChart chart = new JFreeChart(titles[i], plot);

chart.setBorderPaint(Color.black);

chart.setBorderVisible(true);

chart.setBackgroundPaint(Color.white);

chart.getTitle().setFont(new Font("Meiryo UI", 1, 22));

// 凡例

LegendTitle legend = chart.getLegend();

legend.setBackgroundPaint(Color.white);

legend.setMargin(10d, 10d, 10d, 10d);

legend.setItemFont(new Font("Meiryo UI", 1, 12));

// save

File pngFile = new File(workDir + "\\" + filenames[i] + ".png");

try {

ChartUtilities.saveChartAsPNG(pngFile, chart, 600, 400);

} catch (IOException e) {

e.printStackTrace();

}

Posted in Java | コメントは受け付けていません。

25
10月

HashMap을 Value값으로 소트하기

Map<String, Integer> map = countnigByUA.get(url);
// Sorting
TreeMap<String,Integer> sortedMap = new TreeMap<String,Integer>(new ValueComparator(map));
sortedMap.putAll(map);


for (String key : sortedMap.keySet()) {
  // key값은 정렬된 순서대로 나오지만 sortedMap.get으로 가져오면 null
  // HashMap이기때문에 키의 hash값이 변경되었기 때문인듯.
  System.out.println(key + "=" + map.get(key));
}

static class ValueComparator implements Comparator<String> {

    Map<String, Integer> base;
    public ValueComparator(Map<String, Integer> base) {
        this.base = base;
    }

    public int compare(String ipA, String ipB) {
        if (base.get(ipA) >= base.get(ipB)) {
            return -1;
        } else {
            return 1;
        }
    }
}

Map<String, Integer> map = countnigByUA.get(url);

// Sorting

TreeMap<String,Integer> sortedMap = new TreeMap<String,Integer>(new ValueComparator(map));

sortedMap.putAll(map);

for (String key : sortedMap.keySet()) {

// key값은 정렬된 순서대로 나오지만 sortedMap.get으로 가져오면 null

// HashMap이기때문에 키의 hash값이 변경되었기 때문인듯.

System.out.println(key + "=" + map.get(key));

}

static class ValueComparator implements Comparator<String> {

Map<String, Integer> base;

public ValueComparator(Map<String, Integer> base) {

this.base = base;

}

public int compare(String ipA, String ipB) {

if (base.get(ipA) >= base.get(ipB)) {

return -1;

} else {

return 1;

}

Posted in Java | コメントは受け付けていません。

1
10月

TestNG 사용법

import java.lang.reflect.Field;
import java.util.ArrayList;
import java.util.List;

import javax.naming.Context;
import javax.naming.InitialContext;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import javax.transaction.HeuristicMixedException;
import javax.transaction.HeuristicRollbackException;
import javax.transaction.NotSupportedException;
import javax.transaction.RollbackException;
import javax.transaction.SystemException;

import org.apache.log4j.Logger;
import org.jboss.seam.mock.MockHttpServletRequest;
import org.jboss.seam.mock.MockHttpServletResponse;
import org.jboss.seam.mock.SeamTest;
import org.testng.annotations.Test;

public class MyTest extends SeamTest {

	static Logger logger = Logger.getLogger(MyTest.class);

	static {
		try {
			Context initContext = new InitialContext();
			javax.transaction.UserTransaction transaction = new javax.transaction.UserTransaction() {

				@Override
				public void begin() throws NotSupportedException, SystemException {
				}

				@Override
				public void commit() throws RollbackException, HeuristicMixedException, HeuristicRollbackException, SecurityException, IllegalStateException, SystemException {
				}

				@Override
				public int getStatus() throws SystemException {
					return 0;
				}

				@Override
				public void rollback() throws IllegalStateException, SecurityException, SystemException {
				}

				@Override
				public void setRollbackOnly() throws IllegalStateException, SystemException {
				}

				@Override
				public void setTransactionTimeout(int arg0) throws SystemException {
				}

			};
			initContext.bind("/UserTransaction", transaction);

		} catch (Exception e) {
			e.printStackTrace();
		}
	}

	@Test(groups = { "Exception" })
	public void case001() throws Throwable {

		new FacesRequest() {

			@Override
			protected HttpServletRequest createRequest() {
				MockHttpServletRequest req = (MockHttpServletRequest) super.createRequest();

				try {
					// 아래와 같이 필요에 따라 Request 내용을 설정한다.
					// Mockito라는 라이브러리가 있지만 이미 생성된 인스턴스에 대해서는 불가능
					Field f = req.getClass().getDeclaredField("contextPath");
					f.setAccessible(true);
					f.set(req, "/myapp");
				} catch (Exception e) {
					e.printStackTrace();
				}
				return req;
			}

			@Override
			protected void beforeRequest() {
				super.beforeRequest();

				// request parameter 에 대해서는 여기에 설정
				setParameter("a", "b");
			}

			@Override
			protected void updateModelValues() throws Exception {
				// 인잭션이 필요한 컴포넌트는 여기에서 일단 생성
				getInstance("Seam컴포넌트");
			}

			@Override
			protected void invokeApplication() throws Exception {

				// 테스트 내용을 여기에 기술
				assert (체크내용);

			}

		}.run();
	}
}

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import java.lang.reflect.Field;

import java.util.ArrayList;

import java.util.List;

import javax.naming.Context;

import javax.naming.InitialContext;

import javax.servlet.http.HttpServletRequest;

import javax.servlet.http.HttpServletResponse;

import javax.transaction.HeuristicMixedException;

import javax.transaction.HeuristicRollbackException;

import javax.transaction.NotSupportedException;

import javax.transaction.RollbackException;

import javax.transaction.SystemException;

import org.apache.log4j.Logger;

import org.jboss.seam.mock.MockHttpServletRequest;

import org.jboss.seam.mock.MockHttpServletResponse;

import org.jboss.seam.mock.SeamTest;

import org.testng.annotations.Test;

public class MyTest extends SeamTest {

static Logger logger = Logger.getLogger(MyTest.class);

static {

try {

Context initContext = new InitialContext();

javax.transaction.UserTransaction transaction = new javax.transaction.UserTransaction() {

@Override

public void begin() throws NotSupportedException, SystemException {

}

@Override

public void commit() throws RollbackException, HeuristicMixedException, HeuristicRollbackException, SecurityException, IllegalStateException, SystemException {

}

@Override

public int getStatus() throws SystemException {

return 0;

}

@Override

public void rollback() throws IllegalStateException, SecurityException, SystemException {

}

@Override

public void setRollbackOnly() throws IllegalStateException, SystemException {

}

@Override

public void setTransactionTimeout(int arg0) throws SystemException {

}

};

initContext.bind("/UserTransaction", transaction);

} catch (Exception e) {

e.printStackTrace();

}

@Test(groups = { "Exception" })

public void case001() throws Throwable {

new FacesRequest() {

@Override

protected HttpServletRequest createRequest() {

MockHttpServletRequest req = (MockHttpServletRequest) super.createRequest();

try {

// 아래와 같이 필요에 따라 Request 내용을 설정한다.

// Mockito라는 라이브러리가 있지만 이미 생성된 인스턴스에 대해서는 불가능

Field f = req.getClass().getDeclaredField("contextPath");

f.setAccessible(true);

f.set(req, "/myapp");

} catch (Exception e) {

e.printStackTrace();

}

return req;

}

@Override

protected void beforeRequest() {

super.beforeRequest();

// request parameter 에 대해서는 여기에 설정

setParameter("a", "b");

}

@Override

protected void updateModelValues() throws Exception {

// 인잭션이 필요한 컴포넌트는 여기에서 일단 생성

getInstance("Seam컴포넌트");

}

@Override

protected void invokeApplication() throws Exception {

// 테스트 내용을 여기에 기술

assert (체크내용);

}

}.run();

}

위의 샘플소스는 JNDI를 사 … Continue reading →

Posted in Java, JBoss | コメントは受け付けていません。

26
9月

JFreeChart

1.라인 그래프

		CombinedDomainXYPlot plot = new CombinedDomainXYPlot(new DateAxis("Time"));
		plot.setBackgroundPaint(Color.lightGray);
		plot.setDomainGridlinePaint(Color.white);
		plot.setRangeGridlinePaint(Color.white);
		plot.setForegroundAlpha(0.5f);
		plot.setBackgroundAlpha(0.5f);

		TimeSeriesCollection dataset = new TimeSeriesCollection();
		dataset.addSeries(new TimeSeries("Speed1", Millisecond.class));
		dataset.addSeries(new TimeSeries("Speed2", Millisecond.class));

		NumberAxis axisY = new NumberAxis("ms");
		axisY.setAutoRangeIncludesZero(false);
		axisY.setRange(0, 100);

		XYPlot subplot = new XYPlot(dataset, null, axisY, new StandardXYItemRenderer());
		subplot.setBackgroundPaint(Color.lightGray);
		subplot.setDomainGridlinePaint(Color.white);
		subplot.setRangeGridlinePaint(Color.white);
		plot.add(subplot);

		// 시작지점을 0 으로 초기화
		Calendar cal = Calendar.getInstance();
		cal.setTime(now.getTime());
		cal.set(Calendar.HOUR_OF_DAY, 0);
		cal.set(Calendar.MINUTE, 0);
		cal.set(Calendar.SECOND, 0);
		cal.set(Calendar.MILLISECOND, 0);
		dataset.getSeries(0).add(new Millisecond(cal.getTime()), 0);
		dataset.getSeries(1).add(new Millisecond(cal.getTime()), 0);

		// 아래와 같이 datas에 데이터를 그래프로써 추가
		for (int i=0; i<datas.length; i++) {
	       dataset.getSeries(0).add(new Millisecond(now.getTime()), datas[i].value1);
	       dataset.getSeries(1).add(new Millisecond(now.getTime()), datas[i].value2);
		}
		
		// JFreeChart로 그래프 본체 생성
		JFreeChart chart = new JFreeChart("GRAPH TITLE", plot);
		chart.setBorderPaint(Color.black);
		chart.setBorderVisible(true);
		chart.setBackgroundPaint(Color.white);

		// 범례
		LegendTitle legend = chart.getLegend();
		legend.setBackgroundPaint(Color.white);
		legend.setMargin(10d, 10d, 10d, 10d);

		// 이미지 파일로 저장하기
		File pngFile = new File("output.png");
		ChartUtilities.saveChartAsPNG(pngFile, chart, 800, 600);

CombinedDomainXYPlot plot = new CombinedDomainXYPlot(new DateAxis("Time"));

plot.setBackgroundPaint(Color.lightGray);

plot.setDomainGridlinePaint(Color.white);

plot.setRangeGridlinePaint(Color.white);

plot.setForegroundAlpha(0.5f);

plot.setBackgroundAlpha(0.5f);

TimeSeriesCollection dataset = new TimeSeriesCollection();

dataset.addSeries(new TimeSeries("Speed1", Millisecond.class));

dataset.addSeries(new TimeSeries("Speed2", Millisecond.class));

NumberAxis axisY = new NumberAxis("ms");

axisY.setAutoRangeIncludesZero(false);

axisY.setRange(0, 100);

XYPlot subplot = new XYPlot(dataset, null, axisY, new StandardXYItemRenderer());

subplot.setBackgroundPaint(Color.lightGray);

subplot.setDomainGridlinePaint(Color.white);

subplot.setRangeGridlinePaint(Color.white);

plot.add(subplot);

// 시작지점을 0 으로 초기화

Calendar cal = Calendar.getInstance();

cal.setTime(now.getTime());

cal.set(Calendar.HOUR_OF_DAY, 0);

cal.set(Calendar.MINUTE, 0);

cal.set(Calendar.SECOND, 0);

cal.set(Calendar.MILLISECOND, 0);

dataset.getSeries(0).add(new Millisecond(cal.getTime()), 0);

dataset.getSeries(1).add(new Millisecond(cal.getTime()), 0);

// 아래와 같이 datas에 데이터를 그래프로써 추가

for (int i=0; i<datas.length; i++) {

dataset.getSeries(0).add(new Millisecond(now.getTime()), datas[i].value1);

dataset.getSeries(1).add(new Millisecond(now.getTime()), datas[i].value2);

}

// JFreeChart로 그래프 본체 생성

JFreeChart chart = new JFreeChart("GRAPH TITLE", plot);

chart.setBorderPaint(Color.black);

chart.setBorderVisible(true);

chart.setBackgroundPaint(Color.white);

// 범례

LegendTitle legend = chart.getLegend();

legend.setBackgroundPaint(Color.white);

legend.setMargin(10d, 10d, 10d, 10d);

// 이미지 파일로 저장하기

File pngFile = new File("output.png");

ChartUtilities.saveChartAsPNG(pngFile, chart, 800, 600);

2.원형 그래 … Continue reading →

Posted in Java | コメントは受け付けていません。

9
9月

JMeter 리모트 실행방법

Jmeter server / tunneling http://blog.io … Continue reading →

Posted in Java, Linux | コメントは受け付けていません。

9
9月

JBoss 4.2.3 에서 org.jboss.mx.server.MBeanServerBuilderImpl 에러

JBoss4.2.3에서 Caused by: java.lang.ClassN … Continue reading →

Posted in Java, JBoss | コメントは受け付けていません。

Category Archives: Java

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