初次学习socket，写了下面例子
public class SocketServer {
public static void main(String[] args) {
int port = 8089;
ServerSocket server = null;
InputStream in = null;
Socket socket = null;
try {
server = new ServerSocket(port);
System.out.println("server：服务端启动，端口 "+port);
socket = server.accept();
in = socket.getInputStream();
byte[] b = new byte[1024];
int n = 0;
StringBuilder sb = new StringBuilder();
while((n=in.read(b))!=-1){
sb.append(new String(b,0,n));
}
System.out.println("server:我收到客户的msg-"+sb.toString());
} catch (IOException e) {
e.printStackTrace();
}finally{
if(in !=null){
try {
in.close();
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}
if(socket != null){
try {
socket.close();
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}
if(server !=null){
try {
server.close();
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}
}
}
}
public class SocketClient {
public static void main(String[] args) {
Socket socket = null;
int port = 8089;
String host ="127.0.0.1";
OutputStream out = null;
try {
socket = new Socket(host,port);
System.out.println("client:我连接上了服务端");
out = socket.getOutputStream();
out.write("你好".getBytes());
} catch (UnknownHostException e) {
e.printStackTrace();
} catch (IOException e) {
e.printStackTrace();
}finally{
try {
Thread.sleep(10000);
if(out != null){
try {
out.close();
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}
if(socket != null){
try {
socket.close();
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}
} catch (InterruptedException e1) {
// TODO Auto-generated catch block
e1.printStackTrace();
}
}
}
}
发现，当在客户端不close 相关的socket或输出流，服务端read会提示java.net.SocketException: Connection reset异常，这是由于client退出但是没有关闭连接导致。
当然，socket.shutdownOutputStream() 可以提示服务端，发送完成而不阻塞read