java swing开发最简单的浏览器源代码下载

原文：java swing开发最简单的浏览器源代码下载

源代码下载地址：http://www.zuidaima.com/share/1550463483628544.htm

java swing开发最简单的浏览器，已测试....

package com.zuidaima;

import org.eclipse.swt.SWT;
import org.eclipse.swt.browser.Browser;
import org.eclipse.swt.browser.CloseWindowListener;
import org.eclipse.swt.browser.LocationAdapter;
import org.eclipse.swt.browser.LocationEvent;
import org.eclipse.swt.browser.OpenWindowListener;
import org.eclipse.swt.browser.ProgressAdapter;
import org.eclipse.swt.browser.ProgressEvent;
import org.eclipse.swt.browser.StatusTextEvent;
import org.eclipse.swt.browser.StatusTextListener;
import org.eclipse.swt.browser.TitleEvent;
import org.eclipse.swt.browser.TitleListener;
import org.eclipse.swt.browser.WindowEvent;
import org.eclipse.swt.events.KeyAdapter;
import org.eclipse.swt.events.KeyEvent;
import org.eclipse.swt.events.MouseAdapter;
import org.eclipse.swt.events.MouseEvent;
import org.eclipse.swt.events.SelectionAdapter;
import org.eclipse.swt.events.SelectionEvent;
import org.eclipse.swt.layout.GridData;
import org.eclipse.swt.layout.GridLayout;
import org.eclipse.swt.widgets.Button;
import org.eclipse.swt.widgets.Combo;
import org.eclipse.swt.widgets.Composite;
import org.eclipse.swt.widgets.Display;
import org.eclipse.swt.widgets.Label;
import org.eclipse.swt.widgets.Menu;
import org.eclipse.swt.widgets.MenuItem;
import org.eclipse.swt.widgets.ProgressBar;
import org.eclipse.swt.widgets.Shell;
import org.eclipse.swt.widgets.TabFolder;
import org.eclipse.swt.widgets.TabItem;

/**
 * 挺好使的.....
 * @author www.zuidaima.com
 *
 */
public class Liulanqi {//基于标签式的浏览器

 private volatile String newUrl = null;// 最新输入的链接

 private volatile boolean loadCompleted = false;//表示当前页面完全导入

 private volatile boolean openNewItem=false;//表示新的页面在新窗口中打开

 /*
  * 浏览器的当前标签参数
  */

 private TabItem tabItem_now;//当前标签项

 private Browser browser_now;//当前功能浏览器

 /*
  * 浏览器设置参数
  */
 private String homePage = "www.baidu.com";// 浏览器的首页

 /*
  * 浏览器外形布置
  */
 private Button button_back;//后退按钮

 private Button button_forward;//向前按钮

 private Button button_go;//前进按钮

 private Button button_stop;//停止按钮

 private Combo combo_address;// 地址栏

 private Browser browser_default = null;// 浏览窗口

 private ProgressBar progressBar_status;// 网页打开进度表，即页面导入情况栏

 private Label label_status;// 最终网页打开过程显示

 private TabFolder tabFolder;// Browser的容器

 private Composite composite_tool;// 工具栏区域

 private Composite composite_browser;// 浏览窗口区域

 private Composite composite_status;// 状态栏区域

 protected Display display;

 protected Shell shell_default;

 /**
  * Launch the application
  *
  * @param args
  */
 public static void main(String[] args) {
  try {
   Liulanqi window = new Liulanqi();
   window.open();
  } catch (Exception e) {
   e.printStackTrace();
  }
 }

 /**
  * Open the window
  */
 public void open() {
  display = Display.getDefault();
  shell_default = new Shell(display);
  createContents();

  shell_default.open();
  shell_default.layout();
  while (!shell_default.isDisposed()) {
   if (!display.readAndDispatch())
    display.sleep();
  }
 }

 /**
  * Create contents of the window
  */
 protected void createContents() {
  shell_default.setSize(649, 448);
  shell_default.setText("浏览器");
  GridLayout gl_shell = new GridLayout();
  gl_shell.marginWidth = 0;// 组件与容器边缘的水平距离
  gl_shell.marginHeight = 0;// 组件与容器边缘的垂直距离
  gl_shell.horizontalSpacing = 0;// 组件之间的水平距离
  gl_shell.verticalSpacing = 0;// 组件之间的垂直距离
  shell_default.setLayout(gl_shell);

  /*
   * 创建浏览器界面
   */
  //createMenu();//没有实现
  createTool();
  createBrowser();
  createStatus();

  /*
   * 创建浏览器相关事件监听
   */
  runThread();
 }

 /*
  * 创建基本工具栏，不包括相关事件监听
  */
 private void createTool() {

  composite_tool = new Composite(shell_default, SWT.BORDER);
  // GridData()第一个参数是水平排列方式，第二个参数是垂直排列方式,第三个是水平抢占是否,第四个参数是垂直抢占是否
  GridData gd_composite = new GridData(SWT.FILL, SWT.CENTER, true, false);
  gd_composite.heightHint = 30;// 高度和宽度
  gd_composite.widthHint = 549;
  composite_tool.setLayoutData(gd_composite);
  GridLayout fl_composite = new GridLayout();
  fl_composite.numColumns = 8;
  composite_tool.setLayout(fl_composite);

  button_back = new Button(composite_tool, SWT.NONE);
  button_back.setLayoutData(new GridData(27, SWT.DEFAULT));// 设置大小和格式
  button_back.setText("<-");

  button_forward = new Button(composite_tool, SWT.NONE);
  button_forward.setLayoutData(new GridData(24, SWT.DEFAULT));
  button_forward.setText("->");

  combo_address = new Combo(composite_tool, SWT.BORDER);
  final GridData gd_combo_3 = new GridData(SWT.FILL, SWT.LEFT, true,
    false);// 在窗口变化时，自动扩展水平方向的大小
  gd_combo_3.widthHint = 300;// 起始宽度
  gd_combo_3.minimumWidth = 50;// 设置最小宽度
  combo_address.setLayoutData(gd_combo_3);

  button_go = new Button(composite_tool, SWT.NONE);
  button_go.setLayoutData(new GridData(25, SWT.DEFAULT));
  button_go.setText("go");

  button_stop = new Button(composite_tool, SWT.NONE);
  button_stop.setLayoutData(new GridData(24, SWT.DEFAULT));
  button_stop.setText("stop");

  final Label label = new Label(composite_tool, SWT.SEPARATOR
    | SWT.VERTICAL);
  label.setLayoutData(new GridData(2, 17));

 }

 /*
  * 创建浏览器，不包括相关事件监听
  */
 private void createBrowser() {
  composite_browser = new Composite(shell_default, SWT.NONE);
  final GridData gd_composite = new GridData(SWT.FILL, SWT.FILL, true,
    true);// 充满窗口,且水平和垂直方向随窗口而变
  gd_composite.heightHint = 273;
  composite_browser.setLayoutData(gd_composite);
  GridLayout gl_composite = new GridLayout();
  gl_composite.marginHeight = 0;// 使组件上下方向容器
  gl_composite.marginWidth = 0;// 使组件左右方向占满容器
  composite_browser.setLayout(gl_composite);

  tabFolder = new TabFolder(composite_browser, SWT.NONE);
  final GridData gd_tabFolder = new GridData(SWT.FILL, SWT.FILL, true,
    true);
  gd_tabFolder.heightHint = 312;
  gd_tabFolder.widthHint = 585;
  tabFolder.setLayoutData(gd_tabFolder);  

  /*
   * 为标签添加右键功能
   */
  tabFolder.addMouseListener(new MouseAdapter(){
   @Override
   public void mouseUp(MouseEvent e) {
    if(e.button==3){//右键
     Menu menu_itemRightMouse=new Menu(shell_default,SWT.POP_UP);
     tabFolder.setMenu(menu_itemRightMouse);
     MenuItem menuItem_itemClose=new MenuItem(menu_itemRightMouse,SWT.NONE);
     menuItem_itemClose.setText("关闭当前标签");
     menuItem_itemClose.addSelectionListener(new SelectionAdapter(){
      @Override
      public void widgetSelected(SelectionEvent e) {
       if(tabFolder.getItemCount()!=1){//不是只存在一个标签的情况下
        browser_now.dispose();
        tabItem_now.dispose();
        tabFolder.redraw();
       }else{//只有一个标签
        browser_now.setUrl(":blank");
        browser_now.setText("");
       }
      }
     });
     MenuItem menuItem_itemCloseAll=new MenuItem(menu_itemRightMouse,SWT.NONE);
     menuItem_itemCloseAll.setText("关闭所有标签");
     menuItem_itemCloseAll.addSelectionListener(new SelectionAdapter(){
      @Override
      public void widgetSelected(SelectionEvent e) {
       shell_default.close();
      }
     });
    }
   }
  });

  final TabItem tabItem_default = new TabItem(tabFolder, SWT.NONE);
  browser_default = new Browser(tabFolder, SWT.NONE);
  tabItem_default.setControl(browser_default);
  browser_default.setUrl(homePage);// 显示浏览器首页

  /*
   * 把初始化的标签置顶,选中
   */
  tabFolder.setSelection(tabItem_default);

 }

 /*
  * 创建浏览器底部状态栏，不包括相关事件监听
  */
 private void createStatus() {
  composite_status = new Composite(shell_default, SWT.NONE);
  final GridData gd_composite = new GridData(SWT.FILL, SWT.FILL, true,
    false);// 参数true使状态栏可以自动水平伸缩
  gd_composite.heightHint = 20;
  gd_composite.widthHint = 367;
  composite_status.setLayoutData(gd_composite);
  GridLayout gl_composite = new GridLayout();
  gl_composite.numColumns = 2;
  gl_composite.marginBottom = 5;
  composite_status.setLayout(gl_composite);

  label_status = new Label(composite_status, SWT.NONE);
  GridData gd_status = new GridData(SWT.FILL, SWT.CENTER, true, false);
  gd_status.heightHint = 13;
  gd_status.widthHint = 525;
  label_status.setLayoutData(gd_status);

  progressBar_status = new ProgressBar(composite_status, SWT.BORDER
    | SWT.SMOOTH);
  progressBar_status.setLayoutData(new GridData(80, 12));
  progressBar_status.setVisible(false);// 打开过程初始不可见

 }

 private void runThread( ) {

  /*
   * 浏览器新标签前进、后退按钮的默认可用性为不可用
   */
  button_back.setEnabled(false);
  button_forward.setEnabled(false);

  /*
   * 获取浏览器的当前标签和功能Browser
   */
  tabItem_now=tabFolder.getItem(tabFolder.getSelectionIndex());
  browser_now=(Browser) tabItem_now.getControl();

  /*
   * 选中事件发生时，修改当前浏览器标签
   */
  tabFolder.addSelectionListener(new SelectionAdapter(){
   @Override
   public void widgetSelected(SelectionEvent e) {
    TabItem temp=(TabItem) e.item;
    if(temp!=tabItem_now){//防止重选一个标签，预防多次触发相同事件
     tabItem_now=temp;
     browser_now=(Browser)tabItem_now.getControl();
     //System.out.println("当前标签被修改了");//调试语句

     /*
      * 在相应的标签中，前进、后退按钮可用性是不一样的
      */
     if(browser_now.isBackEnabled()){//后退按钮的可用性
      button_back.setEnabled(true);
     }else{
      button_back.setEnabled(false);
     }
     if(browser_now.isForwardEnabled()){//前进按钮的可用性
      button_forward.setEnabled(true);
     }else{
      button_forward.setEnabled(false);
     }

    }
   }
  }); 

  /*
   * 添加浏览器的后退、向前、前进、停止按钮事件监听
   */
  button_back.addSelectionListener(new SelectionAdapter() {
   @Override
   public void widgetSelected(SelectionEvent arg0) {
    if (browser_now.isBackEnabled()){//本次可后退
     browser_now.back();
     button_forward.setEnabled(true);//下次可前进，前进按钮可用
     //System.out.println("可后退");//调试语句
    }
    if(!browser_now.isBackEnabled()){//下次不可后退，后退按钮不可用
     button_back.setEnabled(false);
    }
   }
  });

  button_forward.addSelectionListener(new SelectionAdapter() {
   @Override
   public void widgetSelected(SelectionEvent arg0) {
    if (browser_now.isForwardEnabled()){//本次可前进
     browser_now.forward();
     button_back.setEnabled(true);//后退按钮可用
     //System.out.println("可向前");//调试语句
    }
    if(!browser_now.isForwardEnabled()){//下次不可前进，前进按钮不可用
     button_forward.setEnabled(false);
    }
   }
  });

  button_stop.addSelectionListener(new SelectionAdapter() {
   @Override
   public void widgetSelected(SelectionEvent arg0) {
    browser_now.stop();
   }
  });

  combo_address.addKeyListener(new KeyAdapter() {// 手动输入地址栏后，按回车键转到相应网址
   @Override
   public void keyReleased(KeyEvent e) {
    if (e.keyCode == SWT.CR) {//回车键触发事件
     browser_now.setUrl(combo_address.getText());
    }
   }
  });

  /*
   * 1>在addOpenWindowListener()下的open()写入e.browser = browser_new情况下，导入新的超级链接,
   * 只有当点击页面上的链接,且链接不在新的页面打开时才会发生.
   * 2>在addOpenWindowListener()下的open()不写入e.browser = browser_new情况下，导入新的超级链接，
   * 只有当点击页面上的链接,且链接在新的页面打开时才会发生.
   * 除了以上两种外，当然还包括browser.back()、browser.forward()、browser.go()、browser.setUrl()发生时触发,
   * 但changing()在不写入e.browser = browser_new情况下,不被browser.setUrl()触发
   */
  browser_now.addLocationListener(new LocationAdapter() {
   @Override
   public void changing(LocationEvent e) {// 表示超级链接地址改变了
    if(openNewItem==false){//新的页面在同一标签中打开
     button_back.setEnabled(true);//后退按钮可用,此句是后退按钮可用判定的逻辑开始点
    }
    //System.out.println("location_changing");// 调试语句
   }

   @Override
   public void changed(LocationEvent e) {// 找到了页面链接地址
    combo_address.setText(e.location);// 改变链接地址显示
    /*
     * 新的页面已经打开,browser的LocationListener已经监听完毕,openNewItem回复默认值
     */
    if(openNewItem==true){
     openNewItem=false;
    }
    //System.out.println("location_changed");// 调试语句

   }

  });

  /*
   *  新的超级链接页面的导入的百分比,在导入新的页面时发生，此时链接地址已知
   */
  browser_now.addProgressListener(new ProgressAdapter() {
   @Override
   public void changed(ProgressEvent e) {//本事件不断发生于页面的导入过程中
    progressBar_status.setMaximum(e.total);// e.total表示从最开始页面到最终页面的数值
    progressBar_status.setSelection(e.current);
    if (e.current != e.total) {//页面还没完全导入
     loadCompleted = false;
     progressBar_status.setVisible(true);// 页面的导入情况栏可见
    } else {
     loadCompleted = true;
     progressBar_status.setVisible(false);// 页面导入情况栏不可见
    }
    //System.out.println("progress_changed");//调试语句

   }

   @Override
   public void completed(ProgressEvent arg0) {//发生在一次导入页面时,本监听器changed事件最后一次发生之前
    //System.out.println("progress_completed");//调试语句
   }
  });

  /*
   *  获取页面内容过程,文字显示addProgressListener()过程,同时还能检测到已打开页面的存在的超级链接,就是用给功能来获取
   *  新的链接地址的
   */
  browser_now.addStatusTextListener(new StatusTextListener() {
   public void changed(StatusTextEvent e) {
    if (loadCompleted == false) {
     label_status.setText(e.text);
    } else {
     newUrl = e.text;//页面导入完成，捕捉页面上可能打开的链接
    }
    //System.out.println("statusText_changed");//调试语句
   }
  });

  /*
   * 显示页面的提示语句，在新的页面导入时发生
   */
  browser_now.addTitleListener(new TitleListener() {
   public void changed(TitleEvent e) {
    shell_default.setText(e.title);
    if (e.title.length() > 3) {//显示当前页面提示字符在标签上
     tabItem_now.setText(e.title.substring(0, 3) + "..");
    } else {
     tabItem_now.setText(e.title);
    }
    tabItem_now.setToolTipText(e.title);//标签显示提示符
   }
  });

  /*
   * 打开新的页面，当前打开页面新的链接需要在新的窗口页面打开时发生.addOpenWindowListener下open()中的一句
   * e.browser = browser_new;关键部分.联系addOpenWindowListener、addVisibilityWindowListener
   * 和addDisposeListener的值传递枢纽
   */
  browser_now.addOpenWindowListener(new OpenWindowListener() {// 在当前页面中打开点击的链接页面
     public void open(WindowEvent e) {
      Browser browser_new = new Browser(tabFolder, SWT.NONE);
      TabItem tabItem_new = new TabItem(tabFolder, SWT.NONE);
      tabItem_new.setControl(browser_new);
      tabFolder.setSelection(tabItem_new);//新打开的页面标签置顶
      tabFolder.redraw();//刷新容器
      browser_new.setUrl(newUrl);//新标签中设置新的链接地址
      openNewItem=true;//新的页面在新的标签中打开

      /*
       * 关键部分,告知新的页面由browser_new打开,只要实现这句就不会弹出操作系统默认的浏览器了
       */
      e.browser = browser_new;
      //System.out.println("OpenWindowListener_open");//调试语句

      /*
       * 为浏览器新的标签添加事件监听
       */
      display.syncExec(new Runnable(){
       public void run() {
        runThread();
       }
      });

     }
    });

  /*
   * 浏览器关闭事件,关闭当前功能浏览器,不然的话浏览器主窗口关闭了，还有进程在运行
   */
  browser_now.addCloseWindowListener(new CloseWindowListener(){
   public void close(WindowEvent e) {
    browser_now.dispose();
   }
  });

 }
}