## 1.7TCP文件上传

服务器

```java
package com.zishi.lesson2;

import java.io.*;
import java.net.ServerSocket;
import java.net.Socket;
import java.util.Scanner;

public class TcpSeverDemo02 {
public static void main(String[] args) throws Exception {
//1.创建窗口
ServerSocket serverSocket = new ServerSocket(9000);
//2.监听客户端的连接
Socket socket = serverSocket.accept();//阻塞式监听，会一直等待客户端连接
// Scanner scanner = new Scanner(System.in);
// scanner.next();
//3.获取输入流
InputStream is = socket.getInputStream();

//4.文件输出
FileOutputStream fos = new FileOutputStream(new File("receive.png"));
byte[] buffer = new byte[1024];
int len;
while ((len=is.read(buffer))!=-1){
fos.write(buffer,0,len);
}

//通知客户端接收完毕
OutputStream os = socket.getOutputStream();
os.write("接收完毕，可以断开".getBytes());

// 5.关闭资源
fos.close();
is.close();
socket.close();
serverSocket.close();
}
}
```

客户端

```java
package com.zishi.lesson2;

import java.io.*;
import java.net.InetAddress;
import java.net.Socket;
import java.net.UnknownHostException;

public class TcpClientDemo02 {
public static void main(String[] args) throws Exception {
//1.创建一个Socket连接
Socket socket = new Socket(InetAddress.getByName("127.0.0.1"),9000);
//2.创建一个输出流
OutputStream os = socket.getOutputStream();
//3.文件流
FileInputStream fis = new FileInputStream("xh.png");
//4.写出文件
byte[] buffer = new byte[1024];
int len;
while ((len=fis.read(buffer))!=-1){
os.write(buffer,0,len);
}

//告诉服务器，我已经结束
socket.shutdownOutput();//我已经传输完了！

//确定服务器接收完毕，才能断开连接
InputStream inputStream = socket.getInputStream();
//String byte[]
ByteArrayOutputStream baos = new ByteArrayOutputStream();

byte[] buffer2 = new byte[2048];
int len2;
while ((len2=inputStream.read(buffer2))!=-1){
baos.write(buffer2,0,len2);
}

//5.关闭资源
baos.close();
inputStream.close();
fis.close();
os.close();
socket.close();
}
}
```

```java
package com.zishi.lesson2;

import java.io.*;
import java.net.InetAddress;
import java.net.Socket;
import java.net.UnknownHostException;

public class TcpClientDemo02 {
public static void main(String[] args) throws Exception {
//1.创建一个Socket连接
Socket socket = new Socket(InetAddress.getByName("127.0.0.1"),9000);
//2.创建一个输出流
OutputStream os = socket.getOutputStream();
//3.文件流
FileInputStream fis = new FileInputStream("xh.png");
//4.写出文件
byte[] buffer = new byte[1024];
int len;
while ((len=fis.read(buffer))!=-1){
os.write(buffer,0,len);
}

//告诉服务器，我已经结束
socket.shutdownOutput();//我已经传输完了！

//确定服务器接收完毕，才能断开连接
InputStream inputStream = socket.getInputStream();
//String byte[]
ByteArrayOutputStream baos = new ByteArrayOutputStream();

byte[] buffer2 = new byte[2048];
int len2;
while ((len2=inputStream.read(buffer2))!=-1){
baos.write(buffer2,0,len2);
}

//5.关闭资源
baos.close();
inputStream.close();
fis.close();
os.close();
socket.close();
}
}
```