Applet与javacript通信-白红宇

Applet与javacript通信

阅读量：4158 次

发布时间：2019-05-26

本文共 5705 字，大约阅读时间需要 19 分钟。

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">

<%@ 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

bbbb

</applet>

//以下是用htmlconverter转换后生成的

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">

<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">

</xmp>

</noembed>

</embed>

</comment>

</object>

var DownLoad= function(){};

function showWindowIn(){

try{

//IE里用object的name firefox里用embed id //调用的方法都是applet里的public方法

var app =document.getElementById('uploadAppletApp');

if(app==null||typeof app =='undefined'){

window.document.ShowTaskApplet.showTaskFrame();

}else{

app.showTaskFrame();

}

}catch(e){

alert(e);

}

function showMsg(s){

alert("您输入的是："+s);

}

</script>

</BODY>

</HTML>

===============================================================================================

以上代码不能直接运行，只是将各个关键步骤写下来，自己修改即可

===============================================================================================

附： js调用applet方法有些限制，js调用applet方法时applet的认证会失效，相当于没有认证。

见文章：http://docs.oracle.com/javase/tutorial/deployment/applet/security.html

转载地址：http://zjyxi.baihongyu.com/

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