Java版浏览器源代码（可以打开html文件）下载

来源：互联网发布：aaa软件教育学院编辑：程序博客网时间：2024/04/28 18:02

代码如下：Browser.java

[java] view plaincopyprint?

import java.awt.BorderLayout;
import java.awt.Color;
import java.awt.Container;
import java.awt.FileDialog;
import java.awt.FlowLayout;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.io.IOException;
import java.net.URL;
import javax.swing.JButton;
import javax.swing.JEditorPane;
import javax.swing.JFrame;
import javax.swing.JLabel;
import javax.swing.JMenu;
import javax.swing.JMenuBar;
import javax.swing.JMenuItem;
import javax.swing.JOptionPane;
import javax.swing.JPanel;
import javax.swing.JScrollPane;
import javax.swing.JTextField;
import javax.swing.JViewport;
import javax.swing.event.HyperlinkEvent;
import javax.swing.event.HyperlinkListener;
import javax.swing.text.html.HTMLDocument;
import javax.swing.text.html.HTMLFrameHyperlinkEvent;
/**
* Java简化版浏览器。也可以打开html文件
*
*/
public class Browser extends JFrame implements ActionListener {
private Container contentPane;
// 文本框
private JTextField addressTex;
private JLabel statusLbl;
// 初始化滚动条
private JScrollPane centerPane;
// 编辑显示区域
private JEditorPane textArea;
private JMenuBar munubar;
private JButton btgoto, btback;
private JMenu filemenu;
// 菜单项
private JMenuItem itemopen, itemquit;
public Browser() {
super("Java 简化版浏览器");
setBounds(120, 80, 750, 500);
setDefaultCloseOperation(this.EXIT_ON_CLOSE);
contentPane = this.getContentPane();
// 初始化菜单栏
munubar = new JMenuBar();
setJMenuBar(munubar);
// 初始化菜单
filemenu = new JMenu("文件");
// 将菜单加入菜单栏
munubar.add(filemenu);
// 初始化菜单项
itemopen = new JMenuItem("打开");
itemopen.addActionListener(this);
itemquit = new JMenuItem("关闭");
itemquit.addActionListener(this);
// 将菜单项加入到file菜单
filemenu.add(itemopen);
filemenu.add(itemquit);
contentPane.setLayout(new BorderLayout());
// 地址栏
addressTex = new JTextField(40);
btgoto = new JButton("转到");
btgoto.addActionListener(this);
btback = new JButton("返回");
btback.addActionListener(this);
JPanel toolpanel = new JPanel();
// 设置颜色
toolpanel.setBackground(Color.pink);
toolpanel.setLayout(new FlowLayout());
toolpanel.add(btback);
toolpanel.add(addressTex);
toolpanel.add(btgoto);
contentPane.add(toolpanel, BorderLayout.NORTH);
// 状态栏
statusLbl = new JLabel("status: ");
contentPane.add(statusLbl, BorderLayout.SOUTH);
// 浏览器体部
centerPane = new JScrollPane();
// 显示区域
JViewport view = centerPane.getViewport();
// 内容显示
textArea = new JEditorPane();
// 监听超链接,使其生效
textArea.addHyperlinkListener(new HyperlinkListener() {
public void hyperlinkUpdate(HyperlinkEvent e) {
if (e.getEventType() == HyperlinkEvent.EventType.ACTIVATED) {
JEditorPane pane = (JEditorPane) e.getSource();
statusLbl.setText(e.getURL().toString());
if (e instanceof HTMLFrameHyperlinkEvent) {
HTMLFrameHyperlinkEvent evt = (HTMLFrameHyperlinkEvent) e;
HTMLDocument doc = (HTMLDocument) pane.getDocument();
doc.processHTMLFrameHyperlinkEvent(evt);
} else {
try {
pane.setPage(e.getURL());
} catch (Throwable t) {
t.printStackTrace();
}
}
}
}
});
addressTex.setText("http://www.baidu.com/");
// 设置不可写操作
textArea.setEditable(false);
view.add(textArea);
contentPane.add(centerPane);
}
public void actionPerformed(ActionEvent e) {
//“转到”操作
if (e.getSource() == btgoto) {
String address = addressTex.getText().trim();
statusLbl.setText(address);
try {
if (addressTex.getText().length() > 0
&& (addressTex.getText().startsWith("http://"))||addressTex.getText().startsWith("file:"))
textArea.setPage(address);
else if (addressTex.getText().length() > 0
&& !addressTex.getText().startsWith("http://")) {
String newURL = "";
newURL = "http://" + addressTex.getText();
URL newurl = new URL(newURL);
addressTex.setText(newURL);
textArea.setPage(newurl);
}
} catch (IOException e1) {
e1.printStackTrace();
}
}// end btgoto
//“返回”操作
if (e.getSource() == btback) {
String address = addressTex.getText().trim();
try {
if (addressTex.getText().length() > 0
&& addressTex.getText().startsWith("http://"))
textArea.setPage(address);
else if (addressTex.getText().length() > 0
&& !addressTex.getText().startsWith("http://")) {
String newURL = "";
newURL = "http://" + addressTex.getText();// 加http:
textArea.setPage(newURL);
}
} catch (IOException e1) {
e1.printStackTrace();
}
}// end btback
//“打开”操作
if(e.getSource()==itemopen){
FileDialog fd = new FileDialog(new JFrame(), "Open a file",
FileDialog.LOAD);
fd.setVisible(true);
String name = fd.getFile();
try {
URL url = new URL("file" + ":///" + fd.getDirectory() + name);
addressTex.setText(url.toString());
} catch (Exception e1) {
JOptionPane.showMessageDialog(null, "打开失败!", "openopen打开文件",
JOptionPane.ERROR_MESSAGE);
}
}//end itemopen
//“退出”操作
if(e.getSource()==itemquit){
System.exit(0);
}//end itemquit
}//end actionPerformed
public static void main(String[] args) {
Browser bro = new Browser();
bro.setVisible(true);
}
}