Java教程 网络socket编程
Tcp/IP协议，传输层协议，网络七层协议。
http协议：应用层协议。
Java的Client
package com.situ.chapter5;
import java.io.BufferedWriter;
import java.io.IOException;
import java.io.OutputStream;
import java.io.OutputStreamWriter;
import java.io.Writer;
import java.net.Socket;
import java.net.UnknownHostException;
public class Client {
public static void main(String[] args) {
OutputStream os = null;
Writer writer = null;
BufferedWriter bw = null;
try {
//
System.out.println("等待连接服务端");
Socket socket = new Socket("localhost", 5000);
System.out.println("连接成功");
// 输出流
os = socket.getOutputStream();
writer = new OutputStreamWriter(os, "UTF-8");
// 缓冲流
bw = new BufferedWriter(writer);
bw.write("你好，我是客户端，我想充个值");
bw.flush();
} catch (UnknownHostException e) {
e.printStackTrace();
} catch (IOException e) {
e.printStackTrace();
} finally {
if (os != null) {
try {
os.close();
} catch (IOException e) {
e.printStackTrace();
}
}
if (writer != null) {
try {
writer.close();
} catch (IOException e) {
e.printStackTrace();
}
}
if (bw != null) {
try {
bw.close();
} catch (IOException e) {
e.printStackTrace();
}
}
}
}
}Java的Server：
package com.situ.chapter5;
import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.net.ServerSocket;
import java.net.Socket;
public class Server {
public static void main(String[] args) {
InputStreamReader isr = null;
BufferedReader reader = null;
try {
ServerSocket ss = new ServerSocket(5000);
System.out.println("等待客户端连接...");
// 阻塞等待客户端进行连接
Socket client = ss.accept();
System.out.println(client.getInetAddress().getHostAddress() + "客户端已连接");
// 当连接之后，执行下方代码。从客户端获取流
InputStream is = client.getInputStream();
// 将字节流转换成字符流
isr = new InputStreamReader(is, "UTF-8");
reader = new BufferedReader(isr);
String line = null;
while ((line = reader.readLine()) != null) {
System.out.println(line);
}
System.out.println("读取结束");
} catch (IOException e) {
e.printStackTrace();
} finally {
if (isr != null) {
try {
isr.close();
} catch (IOException e) {
e.printStackTrace();
}
}
if (reader != null) {
try {
reader.close();
} catch (IOException e) {
e.printStackTrace();
}
}
}
}
}来源：刘广法博客，请注意转载出处，网站地址为：https://liuguangfa.com/
