java applet

1.使用Myeclipse 6.5创建一个web工程，命名为“jatest”，创建包为com
  
2.导入Jfreechart包jfreechart-1.0.6.jar和jcommon-1.0.10.jar。右键点击工程名，新建applet。   
  

package com;

import java.applet.Applet;
import javax.swing.JApplet;
import org.jfree.chart.ChartFactory;
import org.jfree.chart.ChartFrame;
import org.jfree.chart.JFreeChart;
import org.jfree.chart.ChartPanel;
import org.jfree.data.general.DefaultPieDataset;
import org.jfree.data.category.CategoryDataset;
import org.jfree.data.category.DefaultCategoryDataset;
import org.jfree.chart.plot.PlotOrientation;
import java.awt.Container; 
import java.awt.Dimension;

public class AppletTest extends JApplet {

	/**
	 * Constructor of the applet.
	 *
	 * @exception HeadlessException if GraphicsEnvironment.isHeadless()
	 * returns true.
	 */
	public AppletTest() {
		super();
	}

	/**
	 * Called by the browser or applet viewer to inform
	 * this applet that it is being reclaimed and that it should destroy
	 * any resources that it has allocated. The <code>stop</code> method
	 * will always be called before <code>destroy</code>. <p>
	 *
	 * A subclass of <code>Applet</code> should override this method if
	 * it has any operation that it wants to perform before it is
	 * destroyed. For example, an applet with threads would use the
	 * <code>init</code> method to create the threads and the
	 * <code>destroy</code> method to kill them. <p>
	 */
	public void destroy() {
		// Put your code here
	}

	/**
	 * Returns information about this applet. An applet should override
	 * this method to return a <code>String</code> containing information
	 * about the author, version, and copyright of the applet. <p>
	 *
	 * @return  a string containing information about the author, version, and
	 * copyright of the applet.
	 */
	public String getAppletInfo() {
		return "This is my default applet created by Eclipse";
	}

	/**
	 * Called by the browser or applet viewer to inform
	 * this applet that it has been loaded into the system. It is always
	 * called before the first time that the <code>start</code> method is
	 * called. <p>
	 *
	 * A subclass of <code>Applet</code> should override this method if
	 * it has initialization to perform. For example, an applet with
	 * threads would use the <code>init</code> method to create the
	 * threads and the <code>destroy</code> method to kill them. <p>
	 */
	public void init() {
		// Put your code here
		 DefaultCategoryDataset dataset = new DefaultCategoryDataset();
		          dataset.addValue(1.0, "Row 1", "Column 1");
		          dataset.addValue(5.0, "Row 1", "Column 2");
		          dataset.addValue(3.0, "Row 1", "Column 3");
		          dataset.addValue(2.0, "Row 2", "Column 1");
		          dataset.addValue(3.0, "Row 2", "Column 2");
		          dataset.addValue(2.0, "Row 2", "Column 3");
		          JFreeChart chart = ChartFactory.createBarChart(
		          "Bar Chart Demo", // chart title
		          "Category", // domain axis label
		          "Value", // range axis label
		          dataset, // data
		          PlotOrientation.VERTICAL, // orientation
		          true, // include legend
		          true, // tooltips?
		          false // URLs?
		         );
		          ChartPanel chartPanel = new ChartPanel(chart);
		          chartPanel.setPreferredSize(new Dimension(500, 270));
		          Container content = getContentPane();
		          content.add(chartPanel);
	}

	/**
	 * Called by the browser or applet viewer to inform
	 * this applet that it should start its execution. It is called after
	 * the <code>init</code> method and each time the applet is revisited
	 * in a Web page. <p>
	 *
	 * A subclass of <code>Applet</code> should override this method if
	 * it has any operation that it wants to perform each time the Web
	 * page containing it is visited. For example, an applet with
	 * animation might want to use the <code>start</code> method to
	 * resume animation, and the <code>stop</code> method to suspend the
	 * animation. <p>
	 */
	public void start() {
		// Put your code here
	}

	/**
	 * Called by the browser or applet viewer to inform
	 * this applet that it should stop its execution. It is called when
	 * the Web page that contains this applet has been replaced by
	 * another page, and also just before the applet is to be destroyed. <p>
	 *
	 * A subclass of <code>Applet</code> should override this method if
	 * it has any operation that it wants to perform each time the Web
	 * page containing it is no longer visible. For example, an applet
	 * with animation might want to use the <code>start</code> method to
	 * resume animation, and the <code>stop</code> method to suspend the
	 * animation. <p>
	 */
	public void stop() {
		// Put your code here
	}

}

3.右键Run As-Java Applet执行，可以看到报表图形，显示正常
  
  　
4.在webroot下新建文件夹applet/com   编译后，将tomcat下的\webapps\jatest\applet\com AppletTest.class文件复制到webroot建立的子目录applet/com下;将jfreechart-1.0.6.jar,jcommon-1.0.10.jar 再复制到webroot的子目录applet/com下

5.修改HTML文件StartPageForAppletTest.html为index.html
  

<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
<html>
  <head>
    <title>My applet 'AppletTest' starting page</title>  
    <meta http-equiv="keywords" content="keyword1,keyword2,keyword3">
    <meta http-equiv="description" content="this is my page">
    <meta http-equiv="content-type" content="text/html; charset=UTF-8">
   </head>
  <body>  
    <applet codebase="/jatest/applet/" 
            code="com.AppletTest.class" 
            archive="jfreechart-1.0.6.jar,jcommon-1.0.10.jar"
            name="AppletTest" 
            width="320" 
            height="240">
    </applet>
  </body>
</html>

codebase 从根目录开始/webproject/folder 下面存储code和archive
code src下编译出来的class 带.层次的class文件 code要建立同样层次的目录
archive 引用的包
name 类名

6.运行tomcat，地址栏输入：

http://localhost:8080/jatest/index.html

就可以看到结果

如果觉得在webroot下新建文件夹applet/com/麻烦，也可以在src里将做好的applet的java文件打成jar包放入webroot下，相应的修改codebase和archive就可以了。