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public boolean getFileInformation(String strurl)

    {

        this.txtFileInfo.setText("");//txtFileInfo是一个JTextArea

        String wrapLine=System.getProperty("line.separator");

        try{

            URL url=new URL(strurl);

            URLConnection urlcon=url.openConnection();

            this.txtFileInfo.append("Source :" strurl wrapLine wrapLine);

            this.txtFileInfo.append("Host :" url.getHost() wrapLine wrapLine);

            this.txtFileInfo.append("Port :" url.getPort() wrapLine wrapLine);

            this.txtFileInfo.append("FileName :" url.getFile() wrapLine wrapLine);

            this.txtFileInfo.append("FileType :" urlcon.getContentType() wrapLine wrapLine);

            this.txtFileInfo.append("FileLength :" urlcon.getContentLength());

            return true;

        }catch(MalformedURLException e){

            e.printStackTrace();

            JOptionPane.showMessageDialog(this,"非法的URL！","错误",JOptionPane.ERROR_MESSAGE);

            return false;

        }

        catch(Exception e)

        {

            JOptionPane.showMessageDialog(this,"连接失败！","错误",JOptionPane.ERROR_MESSAGE);

            e.printStackTrace();

            return false;

        }

    }

//调用:  



boolean isOpen=getFileInformation("http://127.0.0.1:6000/WebModule/天仙子.mp3");



/*得到如下结果



 *Source :http://127.0.0.1:6000/WebModule/天仙子.mp3



 *Host :127.0.0.1



 *Port :6000



 *FileName :/WebModule/天仙子.mp3



 *FileType :text/html;charset=utf-8          //  这里为什么是text/html而部是mp3格式呢？



 *FileLength :1033        //源文件大小是 5024937字节，可这里为什么是1033?

 

 */