Applet与javacript通信_test35 extends applet implements mouse-优快云博客

本文链接：https://blog.youkuaiyun.com/sunshingheavy/article/details/8853387

本文展示了如何在Java Applet中使用JavaScript进行交互，包括弹窗对话框的显示、鼠标事件监听以及调用JavaScript方法。通过实例代码，详细介绍了如何在Applet中实现这些功能，并讨论了在不同浏览器环境下可能遇到的问题。

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netscape.javascript.JSException;
netscape.javascript.JSObject;

这两个类在c:/windows/java/package/目录下有个5M左右的zip文件里，拿出来弄成jar包即可。（jre下有个小点的jar包：plugin.jar 用这个最好）

package applet;

import java.applet.Applet;
import java.awt.Color;
import java.awt.Graphics;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.awt.event.MouseEvent;
import java.awt.event.MouseListener;
import java.text.SimpleDateFormat;
import java.util.Date;

import javax.swing.JButton;
import javax.swing.JLabel;
import javax.swing.JOptionPane;
import javax.swing.JPanel;
import javax.swing.JTextField;
import javax.swing.Timer;

import netscape.javascript.JSException;
import netscape.javascript.JSObject;

public class Test extends Applet implements MouseListener{

   int mouseX=0;
   int mouseY=0;

   JSObject win = null; ;
    JSObject doc;

   public void paint(Graphics g) {
       //Draw a rectangle width=250, height=100
       g.drawRect(0,0,250,100);
       //Set the color to blue
       g.setColor(Color.blue);
       //Write the message to the web page
       g.drawString("Look at me, I'm a Java ccccccc"+mouseY+" "+mouseX,10,50);



       }


   public void showDialogIn() throws Exception{
       String name = JOptionPane.showInputDialog("请输入你的姓名：");
       JOptionPane.showMessageDialog(null, "输入的姓名是："+name);
//        win.eval("javascript:alert(\""+name+"\")");
//        win.eval("javascript:showMsg(\""+name+"\")");
     try {
           win = JSObject.getWindow(this);

win.eval("javascript:alert('bbbbbbbbbbb')");

//这里调用js里的方法

           win.eval("javascript:showMsg('"+name+"');");
       } catch (JSException e) {
           // TODO Auto-generated catch block
           e.printStackTrace();
       }

// doc =(JSObject)win.getMember("document");

// 下面这里直接调用方法不成功，页面提示找不到方法，不知道什么原因

//        doc.call("showMsg", new Object[]{name});
   }

   /**
   *
   */
   private static final long serialVersionUID = 1L;


   public void init() {
       System.out.println("init..........");
       this.addMouseListener(this);



   }

   public static void showTime(JLabel jlabel) {

   }

   public void start() {

   }

   public void mouseClicked(MouseEvent e) {
       JOptionPane.showMessageDialog(null,"aaa"+e.getID()+" ","提示",JOptionPane.WARNING_MESSAGE);

   }

   public void mouseEntered(MouseEvent e) {
       // TODO Auto-generated method stub
       mouseX = e.getX();
       mouseY = e.getY();
       repaint();

   }

   public void mouseExited(MouseEvent e) {
       // TODO Auto-generated method stub

   }

   public void mousePressed(MouseEvent e) {
       // TODO Auto-generated method stub

   }

   public void mouseReleased(MouseEvent e) {
       // TODO Auto-generated method stub

   }

}

<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN"
        "http://www.w3.org/TR/html4/loose.dtd">
<meta http-equiv="Pragma" content="no-cache">
<meta http-equiv="Cache-Control" content="no-cache">
<meta http-equiv="Expires" content="0">
<%@ page contentType="text/html;charset=UTF-8" language="java" %>
<%@ include file="/WEB-INF/jsp/ccs/includes.jsp" %>
<%@ taglib prefix="lms" uri="/WEB-INF/tld/lms.tld" %>
<HTML>
　　
<HEAD>

    　　<TITLE>MyFirstJavaApplet</title>
    　　
</HEAD>
　　
<BODY>
　　Here'smyfirstJavaApplet:sdfsadfa bbbbbbbbbbbbb

　<input type="button" value="go000" onclick="showWindowIn()"/> 　

bbbb
<applet name="Test" width="100" height="100" code="applet/Test.class" archive="netscape.jar" MAYSCRIPT>

</applet>

//以下是用htmlconverter转换后生成的
<object name="ShowTaskApplet"
classid="clsid:8AD9C840-044E-11D1-B3E9-00805F499D93"
codebase="http://java.sun.com/update/1.6.0/jinstall-6u20-windows-i586.cab#Version=6,0,0,6"
WIDTH="0" HEIGHT="0" ALT="文件上传applet小程序">
<PARAM NAME=CODE VALUE="com.wiscom.lms.applet.FileUploadApplet.class">
<PARAM NAME=CODEBASE VALUE="./applet">
<PARAM NAME=ARCHIVE VALUE="uploadApplet.jar,commons-logging-1.1.1.jar,commons-net-3.0.1.jar,plugin.jar">
<param name="type" value="application/x-java-applet;version=1.6">
<PARAM NAME = MAYSCRIPT VALUE = "true" >
<PARAM NAME="type" VALUE="application/x-java-applet;version=1.6">
<PARAM NAME="scriptable" VALUE="false">
<PARAM NAME="host" VALUE="172.16.41.27">
<PARAM NAME="port" VALUE="21">
<PARAM NAME="userName" VALUE="cc">
<PARAM NAME="password" VALUE="cc">
<PARAM NAME="acceptAllFileFilterUsed" VALUE="false">
<PARAM NAME="isDirectorySelectionEnabled" VALUE="true">
<PARAM NAME="ftpPath" VALUE="/aaa/bbb/">

<comment>
<embed id="app"
type="application/x-java-applet;version=1.6"
\
CODE = "com.wiscom.lms.applet.FileUploadApplet.class" \
JAVA_CODEBASE = "./applet" \
ARCHIVE = "uploadApplet.jar,commons-logging-1.1.1.jar,commons-net-3.0.1.jar,plugin.jar" \
ALT = "文件上传applet小程序" \
WIDTH = "400" \
HEIGHT = "300" \
MAYSCRIPT = true \
MAYSCRIPT = "true" \
type ="application/x-java-applet;version=1.6" \
scriptable ="false" \
host ="172.16.41.27" \
port ="21" \
userName ="cc" \
password ="cc" \
acceptAllFileFilterUsed ="true" \
isDirectorySelectionEnabled ="true" \
isFileSelectionEnabled ="true" \
fileNameExtension ="" \
isFileHidingEnabled ="false" \
isMultiSelectionEnabled ="true" \
maxFileSize ="2147483648"
scriptable = false
pluginspage = "http://java.sun.com/products/plugin/index.html#download">
<noembed>
</xmp>
</noembed>
</embed>
</comment>
</object>
<script type="text/javascript">
   var DownLoad= function(){};
   function showWindowIn(){
       try{