关于java socket的问题
要做成这样的：
客户端访问服务器ip和port，服务器马上发送welcome消息，然后客户端根据welcome消息判断是否是想要连接的服务器和端口，
如果是则开始发送数据，数据包括开始和结束的校验。服务器端发送welcome消息后开始接收数据，直到结束。蛮简单的事TMD我怎么就搞不定。
CLIENT：
package com.ces.mytest.socket;
import java.net.*;
import java.io.*;
public class ClientThread extends Thread {
private String ipStr = "";
private int port;
public ClientThread(String ipStr, int port) {
this.ipStr = ipStr;
this.port = port;
}
public void run() {
try {
Socket client = new Socket(ipStr, port);
BufferedReader read = new BufferedReader(new InputStreamReader(client.getInputStream()));
BufferedWriter write = new BufferedWriter(new OutputStreamWriter(client.getOutputStream()));
if ("欢迎".equals(read.readLine())) {
System.out.println("校验正确");
write.write("开始");
write.newLine();
write.write("数据");
write.newLine();
write.write("结束");
write.newLine();
write.flush();
System.out.println("发送完毕");
}
write.close();
read.close();
client.close();
} catch (UnknownHostException ex) {
ex.printStackTrace();
} catch (IOException ex) {
ex.printStackTrace();
}
}
public static void main(String[] args) {
Thread client = new ClientThread("127.0.0.1",10020);
client.start();
}
}
SERVER：
package com.ces.mytest.socket;
import java.net.*;
import java.io.*;
public class ServerThread extends Thread {
private int port;
public ServerThread(int port) {
this.port = port;
}
private boolean stop = false;
public void run() {
try {
ServerSocket server = new ServerSocket(port);
while (!stop) {
Socket client = server.accept();
BufferedReader read = new BufferedReader(new InputStreamReader(client.getInputStream()));
BufferedWriter write = new BufferedWriter(new OutputStreamWriter(client.getOutputStream()));
System.out.println("发送欢迎信息");
write.write("欢迎");
write.flush();
// String lineStr = read.readLine();
// if ("开始".equals(lineStr)) {
// System.out.println("开始接受数据！");
//
// while (true) {
// lineStr = read.readLine();
// if ("结束".equals(lineStr)) {
// break;
// } else {
// System.out.println("数据是" + lineStr);
// }
// }
// }
write.close();
read.close();
client.close();
}
} catch (IOException ex) {
ex.printStackTrace();
}
}
public static void main(String[] args) {
Thread server = new ServerThread(10020);
server.start();
}
public boolean isStop() {
return stop;
}
public void setStop(boolean stop) {
this.stop = stop;
}
}
只要我将ServerThread类的String lineStr = read.readLine();的注释去掉，程序肯定出问题，什么问题呢？分析发现ServerThread的Output流必须等write.close()执行完才发送，而read.readLine()程序就会停在那里，所谓的block程序，可参考上明明说write.flush()即可发送啊，搞不懂搞不懂，这样我的握手协议怎么做啊？？