将html转换成图像 -

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将html转换成图像

HTML OS Eclipse Tomcat thread

需要eclipse的swt.jar

public class HtmlToImageUtil {
private Display display;
private Shell shell;
private Browser browser;
    private boolean completed = false;
    static final ArrayList urls = new ArrayList();
static boolean canRemove = false;
static void initialize(final Display display, Browser browser) {
       browser.addListener(SWT.MouseDown, new Listener() {
         public void handleEvent(Event event) {
           System.out.println("event.time:" + event.time);
         }
       });
       browser.addOpenWindowListener(new OpenWindowListener() {
         public void open(WindowEvent event) {
           // Embed the new window
           final Shell shell = new Shell(display);
           shell.setText("New Window");
           shell.setLayout(new FillLayout());
           final Browser browser = new Browser(shell, SWT.NONE);
           initialize(display, browser);
           event.browser = browser;
           event.display.asyncExec(new Runnable() {
               public void run() {
                 String url = browser.getUrl();
                 System.out.println(url);
                 System.out.println(browser.getText());
                 if (urls.contains(url)){
                   //flag to chek if the window is closed automatic
                   canRemove = false;
                   shell.close();
                 }
                 else{
                   canRemove = true;
                   urls.add(url);
                 }

               }
           });
          // System.out.println("open...............");
         }

       });
       browser.addVisibilityWindowListener(new VisibilityWindowListener() {
         public void hide(WindowEvent event) {
           Browser browser = (Browser) event.widget;
           Shell shell = browser.getShell();
           shell.setVisible(false);
          // System.out.println("hide................");
         }

         public void show(WindowEvent event) {
           Browser browser = (Browser) event.widget;
           Shell shell = browser.getShell();
           if (event.location != null)
               shell.setLocation(event.location);
           if (event.size != null) {
               Point size = event.size;
               shell.setSize(shell.computeSize(size.x, size.y));
           }
           if (event.addressBar || event.menuBar || event.statusBar
                 || event.toolBar) {
               // Create widgets for the address bar, menu bar, status bar and/or tool bar
               // leave enough space in the Shell to accomodate a Browser of the size
               // given by event.size
           }
           shell.open();
           //System.out.println("show.......................");
         }
       });
       browser.addDisposeListener(new DisposeListener(){
         public void widgetDisposed(DisposeEvent event){
           Browser browser = (Browser) event.widget;
           if (canRemove)
               urls.remove(browser.getUrl());
           Shell shell = browser.getShell();
          // shell.close();

          // System.out.println("dispose....................");
         }
       });
}

    public HtmlToImageUtil(){

    }
    /**
     * 将html地址的内容转换成图片
     * @param htmlUrl html的地址
     * @param imgUrl 生成图片的地址
     * @param xDifference 生成图片在原来的基础上的x轴方向的减量
     * @param yDifference 生成图片在原来的基础上的y轴方向的减量
     * @param imageWidth 生成图片的宽度
     * @param imageHeight 生成图片的高度
     */
    public HtmlToImageUtil(String htmlUrl,String imgUrl,int xDifference,int yDifference,int imageWidth,int imageHeight)
    {
       display = new Display();

        shell = new Shell(display);
        shell.setVisible(false);
        shell.setLayout(new FillLayout());

        browser = new Browser(shell, SWT.EMBEDDED | SWT.NO_FOCUS | SWT.NO_REDRAW_RESIZE );
        browser.refresh();
        browser.clearSessions();
        browser.setUrl(htmlUrl);
        initialize(display, browser);
        //shell.open();
        browser.addProgressListener(new ProgressListener(){

   public void changed(ProgressEvent progressevent) {
    // TODO Auto-generated method stub
    //System.out.println("change.........");

   }

   public void changed(ProgressEvent progressevent) {
    // TODO Auto-generated method stub
    //System.out.println("change.........");
   }

   public void completed(ProgressEvent progressevent) {
    // TODO Auto-generated method stub
    completed=true;
    //System.out.println("complete........");
   }

       });

        while (!shell.isDisposed())
        {
            if (!display.readAndDispatch())
            {
            //display.update();
            if(completed){
               capture(imgUrl, xDifference, yDifference, imageWidth, imageHeight);
               completed = false;

               try {
     Thread.sleep(50);
     display.dispose();//注销display
      } catch (InterruptedException e) {
     // TODO Auto-generated catch block
     e.printStackTrace();
     }
            }


            } else{
            //display.dispose();
            }

        }
        display.dispose();
    }



    /**
     *
    * @param imgUrl 生成图片的地址
     * @param xDifference 生成图片在原来的基础上的x轴方向的减量
     * @param yDifference 生成图片在原来的基础上的y轴方向的减量
     */
    private void capture(String imgUrl,int xDifference,int yDifference,int imageWidth,int imageHeight)
    {

         GC gc = new GC(browser);
         //设置默认的宽度
         if(BlankUtil.isBlank(imageWidth)){
        imageWidth=1050;
         }

         //设置默认的高度
         if(BlankUtil.isBlank(imageWidth)){
        imageHeight=450;
         }


        //始终最前 (50:x轴,50:主轴,1050:图像的x轴的长度,450:图像的y轴的长度)
        OS.SetWindowPos(shell.handle , OS.HWND_TOPMOST, 50 , 50 ,imageWidth, imageHeight , SWT.NULL);
        shell.setVisible(true);
        shell.open();
        shell.layout();
        try {
   Thread.sleep(30);
  } catch (InterruptedException e) {
   // TODO Auto-generated catch block
   e.printStackTrace();
  }
        Point size = browser.getSize();


        Image image = new Image(display, size.x-xDifference, size.y-yDifference);
        gc.copyArea(image, 0, 0);
        shell.setVisible(false);

       // BufferedImage bufferedImage=new BufferedImage(500,500,BufferedImage.TYPE_INT_RGB);

        ImageLoader imageLoader = new ImageLoader();
        imageLoader.data = new ImageData[] {image.getImageData()};
        imageLoader.save(imgUrl, SWT.IMAGE_JPEG);
        gc.dispose();
        image.dispose();
        //display.dispose();


        //System.out.println("captured");
    }

    public class BrowserProgress implements ProgressListener
    {
        public void changed(ProgressEvent a_Event)
        {
        //completed = true;
        //System.out.println("changed.......");
        }

        public void completed(ProgressEvent a_Event)
        {
            completed = true;
            //System.out.println("complete........");
        }
    }




public static void main(String[] args) {
    /*
        new HtmlToImageUtil("E:/test.html","D:/test.jpg",18,0,1050,450);

  System.out.println("test");*/
  //new HtmlToImageUtil("aaa","F:/aa.jpg",18,0,1050,450,true);
  //new HtmlToImageUtil("F:/reportWorkSpace/JxlReport/WebContent/test.html","D:/test.jpg",18,0,1050,802);

  //new HtmlToImageUtil("D:/jakarta-tomcat-5.0.27/webapps/road/testImage/test.html","D:/test.jpg",18,0,1050,802);

  //new HtmlToImageUtil("F:/d.html","D:/test.jpg",18,0,1050,802);
}