Runtime.getRuntime().exec("rundll32 url.dll,FileProtocolHandler //www.jb51.net");

//判斷當(dāng)前系統(tǒng)是否支持Java AWT Desktop擴(kuò)展
        if(java.awt.Desktop.isDesktopSupported()){
            try{
                //創(chuàng)建一個(gè)URI實(shí)例,注意不是URL
                java.net.URI uri=java.net.URI.create("http://www.jb51.net");
                //獲取當(dāng)前系統(tǒng)桌面擴(kuò)展
                java.awt.Desktop dp=java.awt.Desktop.getDesktop();
                //判斷系統(tǒng)桌面是否支持要執(zhí)行的功能
                if(dp.isSupported(java.awt.Desktop.Action.BROWSE)){
                    //獲取系統(tǒng)默認(rèn)瀏覽器打開鏈接
                    dp.browse(uri);
                }
            }catch(java.lang.NullPointerException e){
                //此為uri為空時(shí)拋出異常
            }catch(java.io.IOException e){
                //此為無(wú)法獲取系統(tǒng)默認(rèn)瀏覽器
            }
        }