实现TCP的网络编程
- 一、代码
- 二、图片
总结于尚硅谷学习视频
一、代码
TCPTest1类
package com.day0320_1;
import org.junit.jupiter.api.Test;
import java.io.*;
import java.net.InetAddress;
import java.net.ServerSocket;
import java.net.Socket;
/**
* 实现TCP的网络编程
* 例子1:客户端发送信息给服务端,服务端将数据显示在控制台上
*
*
*/
public class TCPTest1 {
//客户端
@Test
public void client() {
Socket socket = null;
OutputStream os = null;
try {
//1.创建Socket对象,指明了服务器的IP和端口号
InetAddress inet =InetAddress.getByName("127.0.0.1");
socket = new Socket(inet,8899);
//2.获取一个输出流,用于输入数据
os = socket.getOutputStream();
//3.写出数据的操作
os.write("你好,我是客户端mm".getBytes());
} catch (IOException e) {
e.printStackTrace();
} finally {
//4.资源关闭
if(os!=null)
try {
os.close();
} catch (IOException e) {
e.printStackTrace();
}
if(socket!=null)
try {
socket.close();
} catch (IOException e) {
e.printStackTrace();
}
}
}
//服务端
@Test
public void server(){
ServerSocket ss = null;
Socket socket = null;
InputStream is= null;
ByteArrayOutputStream baos= null;
try {
//1.创建服务器端的ServerSocket,指明自己的端口号
ss = new ServerSocket(8899);
//2.调用accept()来表示接受来自于客户端的socket
socket = ss.accept();
//3.获取输入流
is = socket.getInputStream();
//不建议这样写,可能会有乱码
// byte[] buffer =new byte[1024];
// int len;
// while((len=is.read())!=-1){
// String str= new String(buffer,0,len);
// System.out.println(str);
// }
//4.读取输入流当中的数据
baos = new ByteArrayOutputStream();
byte[] buffer=new byte[5];
int len;
while((len=is.read(buffer))!=-1){
baos.write(buffer,0,len);
}
System.out.println(baos.toString());
System.out.println("收到了来自于:"+socket.getInetAddress().getHostAddress()+"的数据");
} catch (IOException e) {
e.printStackTrace();
} finally {
//5.
// 关闭资源
if(baos!=null) {
try {
baos.close();
} catch (IOException e) {
e.printStackTrace();
}
}
if(is!=null){
try {
is.close();
} catch (IOException e) {
e.printStackTrace();
}
}
if(socket!=null){
try {
socket.close();
} catch (IOException e) {
e.printStackTrace();
}
}
if(ss!=null){
try {
ss.close();
} catch (IOException e) {
e.printStackTrace();
}
}
}
}
}
TCPTest2类
package com.day0320_1;
import org.junit.jupiter.api.Test;
import java.io.*;
import java.net.InetAddress;
import java.net.ServerSocket;
import java.net.Socket;
import java.net.UnknownHostException;
/**
* 实现TCP的网络编程
* 例子2:客户端发送文件给服务端,服务端将文件保存在本地
*
*
*/
public class TCPTest2 {
/*
这里涉及到的异常,应该使用try-catch-finally处理
*/
@Test
public void client()throws IOException {
//1.
Socket socket=new Socket(InetAddress.getByName("127.0.0.1"),9090);
//2.
OutputStream os=socket.getOutputStream();
//3.
FileInputStream fis=new FileInputStream(new File("图片.png"));
//4.
byte[] buffer =new byte[1024];
int len;
while ((len=fis.read(buffer))!=-1){
os.write(buffer,0,len);
}
//5.
fis.close();
os.close();
socket.close();
}
/*
这里涉及到的异常,应该使用try-catch-finally处理
*/
@Test
public void server()throws IOException{
//1.
ServerSocket ss = new ServerSocket(9090);
//2.
Socket socket=ss.accept();
//3.
InputStream is = socket.getInputStream();
//4.
FileOutputStream fos=new FileOutputStream(new File("新图片.png"));
//5.
byte[] buffer=new byte[1024];
int len;
while ((len=is.read(buffer))!=-1){
fos.write(buffer,0,len);
}
//6.
fos.close();
is.close();
socket.close();
ss.close();
}
}
TCPTest3类
package com.day0320_1;
import org.junit.jupiter.api.Test;
import java.io.*;
import java.net.InetAddress;
import java.net.ServerSocket;
import java.net.Socket;
/**
* 实现TCP的网络编程
* 例子3:客户端发送文件给服务端,服务端将文件保存在本地,并返回“发送成功”给客户端,
* 并关闭相应的连接
*
*
*/
public class TCPTest3 {
/*
这里涉及到的异常,应该使用try-catch-finally处理
*/
@Test
public void client()throws IOException {
//1.
Socket socket=new Socket(InetAddress.getByName("127.0.0.1"),9090);
//2.
OutputStream os=socket.getOutputStream();
//3.
FileInputStream fis=new FileInputStream(new File("图片.png"));
//4.
byte[] buffer =new byte[1024];
int len;
while ((len=fis.read(buffer))!=-1){
os.write(buffer,0,len);
}
//关闭数据的输出
socket.shutdownOutput();
//5.接受来自于服务器端的反馈,并显示在控制台上
InputStream is = socket.getInputStream();
ByteArrayOutputStream baos=new ByteArrayOutputStream();
byte[] buffer1= new byte[1024];
int len1;
while ((len1= is.read(buffer1))!=-1){
baos.write(buffer1,0,len1);
}
System.out.println(baos.toString());
//6.
fis.close();
os.close();
socket.close();
baos.close();
}
/*
这里涉及到的异常,应该使用try-catch-finally处理
*/
@Test
public void server()throws IOException{
//1.
ServerSocket ss = new ServerSocket(9090);
//2.
Socket socket=ss.accept();
//3.
InputStream is = socket.getInputStream();
//4.
FileOutputStream fos=new FileOutputStream(new File("新图片1.png"));
//5.
byte[] buffer=new byte[1024];
int len;
while ((len=is.read(buffer))!=-1){
fos.write(buffer,0,len);
}
System.out.println("图片传输完成");
//6.服务器端给予客户端反馈
OutputStream os = socket.getOutputStream();
os.write("你好,美女,照片我已收到,非常漂亮".getBytes());
//7.
fos.close();
is.close();
socket.close();
ss.close();
os.close();
}
}
二、图片