java中TCP两个例子大写服务器和文件上传-优快云博客

本文提供了一个Java网络编程的示例，包括大写转换服务器和服务端文件上传两个具体应用案例。通过客户端与服务器间的交互实现字符串的大写转换及文件的上传功能。

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大写服务器的实例：

package com.core.net;

import java.io.BufferedReader;
import java.io.BufferedWriter;
import java.io.InputStreamReader;
import java.io.OutputStreamWriter;
import java.io.PrintWriter;
import java.net.ServerSocket;
import java.net.Socket;

class TransClient{
	
	public static void main(String[] args) throws Exception {
		
		Socket socket = new Socket("localhost", 10005);
		
		//键盘输入
		BufferedReader reader = new BufferedReader(new InputStreamReader(System.in));
		//socket输入流
		BufferedReader bufin = new BufferedReader(new InputStreamReader(socket.getInputStream()));
		//socket输出流
	//	BufferedWriter bufout = new BufferedWriter(new OutputStreamWriter(socket.getOutputStream()));
		
		PrintWriter bufout = new PrintWriter(socket.getOutputStream(),true);
		
		String line = null;
		while((line = reader.readLine())!=null){
			
			if("over".equals(line))
				break;
			bufout.println(line);
//			bufout.write(line);
//			bufout.newLine();//***要注意 "\r\n"
//			bufout.flush();
		
			String str = bufin.readLine();
			System.out.println("server:"+str);
			
		}
		reader.close();
		socket.close();
		
	}
}

class TransServer{
	
	public static void main(String[] args) throws Exception {
		
		ServerSocket ss = new ServerSocket(10005);
		
		     Socket s = ss.accept();
		     String ip = s.getInetAddress().getHostAddress();
		     System.out.println(ip+"......connection");
		 BufferedReader reader = new BufferedReader(new InputStreamReader(s.getInputStream()));
		// BufferedWriter out = new BufferedWriter(new OutputStreamWriter(s.getOutputStream()));
		 PrintWriter out = new PrintWriter(s.getOutputStream(),true);
		 
		 String line = null;
		
		 while((line = reader.readLine())!=null){
			 
			 System.out.println(line);
			 out.println(line.toUpperCase());
//			 out.write(line.toUpperCase());
//			 out.newLine();
//			 out.flush();
		 }
		 s.close();
		 ss.close();
	}
}
public class TransDemo {

	public static void main(String[] args) {
		
	}
}

文件上传实例：

package com.core.net;

import java.io.BufferedReader;
import java.io.FileReader;
import java.io.FileWriter;
import java.io.InputStreamReader;
import java.io.PrintWriter;
import java.net.ServerSocket;
import java.net.Socket;
/*
 *将文件上传 
 *
 */
class TextClient{
	
	public static void main(String[] args) throws Exception {
		
		Socket s = new Socket("localhost", 10006);
		//注意这里的文件路径非常重要，找了好久的错误
		BufferedReader reader = new BufferedReader(new FileReader("src/com/core/net/IPDemo.java"));
		
		PrintWriter bufout = new PrintWriter(s.getOutputStream(),true);
		
		
		
		String line = null;
		while((line = reader.readLine())!=null){
			bufout.println(line);
		}
		
		s.shutdownOutput();//关闭数据流，输出结束标志
		
		BufferedReader bufin = new BufferedReader(new InputStreamReader(s.getInputStream()));
		String str = bufin.readLine();
		System.out.println(str);
		reader.close();
		s.close();
	}
}
class TextServer{
	
	public static void main(String[] args) throws Exception {
		
		ServerSocket ss = new ServerSocket(10006);
		
		Socket s = ss.accept();
		String ip = s.getInetAddress().getHostAddress();
		System.out.println(ip+".....connection");
		
		BufferedReader bufin = new BufferedReader(new InputStreamReader(s.getInputStream()));
		
		PrintWriter out = new PrintWriter(new FileWriter("server.txt"),true);
		
		String line = null;
		while((line =bufin.readLine())!=null){
			out.println(line);
		}
		PrintWriter pw = new PrintWriter(s.getOutputStream(),true);
		
		pw.println("上传成功");
		
		out.close();
		s.close();
		ss.close();
	}
}

public class UploadText {

	public static void main(String[] args) {
		
	}
}

转载于:https://www.cnblogs.com/lzeffort/p/4716808.html