求帮忙改下代码，我希望实现同步SOCKET，望大家能帮忙改下

public class SocketServer {
public SocketServer(){
        Socket incoming;
        ServerSocket so;
        try{
            so= new ServerSocket(9731);
            System.out.println("等待客户端连接");
         
            while(true){
                try{
                      incoming = so.accept( );
                      System.out.println("已连接客户端");
                      GetInfo gi=new GetInfo(incoming);
                 } catch (IOException e){
                 so.close();
                    e.printStackTrace();
                 }
            }
        }catch (IOException e){
             e.printStackTrace();
        }
    }

    public static void main(String[] args){       PropertyConfigurator.configure("E:\\Myeclipse\\workspace\\oufeitest\\src\\oufei\\test\\log4j.properties");
      new SocketServer();
    }
    private static class GetInfo implements Runnable{   //�߳���
        private Socket incoming;
        private String s=null;
        private BufferedReader b;
        Thread t;        public GetInfo(Socket incoming){
            try{
                this.incoming=incoming;
                b=new BufferedReader(new InputStreamReader(incoming.getInputStream()));
                t=new Thread(this);
                t.start();
            }catch(IOException e){
                e.printStackTrace();
            }    
        }
        
    
        public void run(){
            try{
               Logger logger=Logger.getLogger(SocketServer.class);
             String lines;
             String line="";
                while ((lines = b.readLine()) != null){
                 line+=lines;
                }
                System.out.println("line----"+line);
                System.out.println(line.length());
                List<String> list1 = new ArrayList<String>();
                for(int i=0;i<line.length();i+=63){
                 list1.add(line.substring(i,i+63));
                }
                Iterator list=list1.iterator();
             while(list.hasNext()){
                 String co="";
    co=(String) list.next();            
                     logger.info("后台socket发送给我的内容："+co);
             String post_url="http://esales1.ofcard.com:8088/onlineorder.do";
                        String content=ConcatPackage.getPackage(co);
                        //用post方式发送http请求
             String xmlcontent="";////
             try {
              xmlcontent=Sender.readContentFromPost(post_url, content);
             } catch (IOException e) {
             // TODO Auto-generated catch block
             System.out.println("不好啦，发送http请求出问题啦，哦也！");
             e.printStackTrace();
             }
             System.out.println("查看取得的xml字符串是否为空："+xmlcontent);
//             String xmlc=xmlcontent.substring(0, 40);
//             System.out.println(xmlc);
             System.out.println("发送欧非任务已完成");
             //处理接收xml,并以socket发送到交换平台
//             Getxml getxml = new Getxml();
//             String xmlcontent = getxml.getxmlcontent();             Decodexml decoderxml = new Decodexml();
             String packagesend = decoderxml.xmlElements(xmlcontent);  //xml字符串被解析并被拼装为package
                 try {
                  System.out.println("组装的发送后台的SOCKET为："+"["+packagesend+"]");
             } catch (IOException e) {
             // TODO Auto-generated catch block
             System.out.println("发送给后台的socket失败！");
             e.printStackTrace();
             }
            
             }
            
            }catch(IOException e){
                e.printStackTrace();
            }        }
    }
   
 }
以上代码我测试过可以接收到客服端的请求，但是我如何同步返回经过我处理后的信息呢？？？？求高手指点，小弟在线等