Sorket客户端通过tcp协议发送/接收服务端数据

package com.jandar.vtm.system.service;

import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;
import java.io.OutputStream;
import java.net.SocketException;
import java.nio.CharBuffer;

import org.apache.commons.net.telnet.TelnetClient;

public class TCPClient {

    private TelnetClient tcpClient = null;
　　//传入目标电脑ip,端口号,要发送给它的内容
    public String sendRISC(String IP,int port,String content){
        tcpClient = new TelnetClient();//创建客户端对象，相当于sorket
　　　　//客户端发送数据
           try {
            tcpClient.connect(IP,port);
            OutputStream os = tcpClient.getOutputStream();
            os.write(content.getBytes("utf-8"));
            os.flush();
            //os.close();//不要关闭,后面等待服务端传过来的内容
　　　　　　　//获取服务端内容
            try {                     
                BufferedReader reader = new BufferedReader(new InputStreamReader(tcpClient.getInputStream(),"utf-8"));
                CharBuffer charBuffer = CharBuffer.allocate(8192);  
                int index = -1;  
                while((index=reader.read(charBuffer))!=-1){  
                    charBuffer.flip();  //对面电脑是用C#些的服务端，所以不用index来得到数据,直接通过CharBuffer再好不过
                    System.out.println("client:"+charBuffer.toString());  
                }  
            } catch (Exception e) {  
                e.printStackTrace();  
            }
            tcpClient.disconnect();
        } catch (SocketException e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
            return "error";
        } catch (IOException e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
            return "error";
        }
        
           return "success";
        }
    
}