「java发送请求」java发送请求模拟ip

博主:adminadmin 2022-11-21 13:35:08 118

本篇文章给大家谈谈java发送请求,以及java发送请求模拟ip对应的知识点,希望对各位有所帮助,不要忘了收藏本站喔。

本文目录一览:

java发送put请求

1.服务端

package sterning;

import java.io.BufferedReader;

import java.io.IOException;

import java.io.InputStream;

import java.io.InputStreamReader;

import java.io.OutputStream;

import java.io.PrintWriter;

import java.net.*;

import java.util.concurrent.*;

public class MultiThreadServer {

private int port=8821;

private ServerSocket serverSocket;

private ExecutorService executorService;//线程池

private final int POOL_SIZE=10;//单个CPU线程池大小

public MultiThreadServer() throws IOException{

serverSocket=new ServerSocket(port);

//Runtime的availableProcessor()方法返回当前系统的CPU数目.

executorService=Executors.newFixedThreadPool(Runtime.getRuntime().availableProcessors()*POOL_SIZE);

System.out.println("服务器启动");

}

public void service(){

while(true){

Socket socket=null;

try {

//接收客户连接,只要客户进行了连接,就会触发accept();从而建立连接

socket=serverSocket.accept();

executorService.execute(new Handler(socket));

} catch (Exception e) {

e.printStackTrace();

}

}

}

public static void main(String[] args) throws IOException {

new MultiThreadServer().service();

}

}

class Handler implements Runnable{

private Socket socket;

public Handler(Socket socket){

this.socket=socket;

}

private PrintWriter getWriter(Socket socket) throws IOException{

OutputStream socketOut=socket.getOutputStream();

return new PrintWriter(socketOut,true);

}

private BufferedReader getReader(Socket socket) throws IOException{

InputStream socketIn=socket.getInputStream();

return new BufferedReader(new InputStreamReader(socketIn));

}

public String echo(String msg){

return "echo:"+msg;

}

public void run(){

try {

System.out.println("New connection accepted "+socket.getInetAddress()+":"+socket.getPort());

BufferedReader br=getReader(socket);

PrintWriter pw=getWriter(socket);

String msg=null;

while((msg=br.readLine())!=null){

System.out.println(msg);

pw.println(echo(msg));

if(msg.equals("bye"))

break;

}

} catch (IOException e) {

e.printStackTrace();

}finally{

try {

if(socket!=null)

socket.close();

} catch (IOException e) {

e.printStackTrace();

}

}

}

}

2.客户端

package sterning;

import java.io.BufferedReader;

import java.io.IOException;

import java.io.InputStreamReader;

import java.io.OutputStream;

import java.net.Socket;

import java.util.concurrent.ExecutorService;

import java.util.concurrent.Executors;

public class MultiThreadClient {

public static void main(String[] args) {

int numTasks = 10;

ExecutorService exec = Executors.newCachedThreadPool();

for (int i = 0; i numTasks; i++) {

exec.execute(createTask(i));

}

}

// 定义一个简单的任务

private static Runnable createTask(final int taskID) {

return new Runnable() {

private Socket socket = null;

private int port=8821;

public void run() {

System.out.println("Task " + taskID + ":start");

try {

socket = new Socket("localhost", port);

// 发送关闭命令

OutputStream socketOut = socket.getOutputStream();

socketOut.write("shutdown\r\n".getBytes());

// 接收服务器的反馈

BufferedReader br = new BufferedReader(

new InputStreamReader(socket.getInputStream()));

String msg = null;

while ((msg = br.readLine()) != null)

System.out.println(msg);

} catch (IOException e) {

e.printStackTrace();

}

}

};

}

}

「java发送请求」java发送请求模拟ip

Java发送get请求时设置ua

HttpClient方式发送请求或则以流的方式。

两种实现方式不同,怎么使用看个人喜好,不过在项目开发过程中,使用流的方式部署在预发机linux机器上会出现发送请求返回null的情况,但是本地windows却正常访问,而且,换另外一台预发机也能正常获取数据,目前还没有研究出个所以然,get是从服务器上获取数据,post是向服务器传送数据,get是把参数数据队列加到提交表单的ACTION属性所指的URL中,值和表单内各个字段一一对应,在URL中可以看到,post是通过HTTPpost机制,将表单内各个字段与其内容放置在HTML HEADER内一起传送到ACTION属性所指的URL地址。

如何使用java 发送post请求

/**

* 向指定 URL 发送POST方法的请求

*

* @param url

* 发送请求的 URL

* @param param

* 请求参数,请求参数应该是 name1=value1name2=value2 的形式。

* @return 所代表远程资源的响应结果

*/

public static String sendPost(String url, String param) {

PrintWriter out = null;

BufferedReader in = null;

String result = "";

try {

URL realUrl = new URL(url);

// 打开和URL之间的连接

URLConnection conn = realUrl.openConnection();

// 设置通用的请求属性

conn.setRequestProperty("accept", "*/*");

conn.setRequestProperty("connection", "Keep-Alive");

conn.setRequestProperty("user-agent",

"Mozilla/4.0 (compatible; MSIE 6.0; Windows NT 5.1;SV1)");

// 发送POST请求必须设置如下两行

conn.setDoOutput(true);

conn.setDoInput(true);

// 获取URLConnection对象对应的输出流

out = new PrintWriter(conn.getOutputStream());

// 发送请求参数

out.print(param);

// flush输出流的缓冲

out.flush();

// 定义BufferedReader输入流来读取URL的响应

in = new BufferedReader(

new InputStreamReader(conn.getInputStream()));

String line;

while ((line = in.readLine()) != null) {

result += line;

}

} catch (Exception e) {

System.out.println("发送 POST 请求出现异常!"+e);

e.printStackTrace();

}

//使用finally块来关闭输出流、输入流

finally{

try{

if(out!=null){

out.close();

}

if(in!=null){

in.close();

}

}

catch(IOException ex){

ex.printStackTrace();

}

}

return result;

}

java怎么主动发送http请求

实现思路就是先定义请求头内容,之后进行请求头设置。

定义请求头

LinkedHashMapString,String headers = new LinkedHashMapString,String();

headers.put("Content-type","text/xml");

headers.put("Cache-Control", "no-cache");

headers.put("Connection", "close");

给HttpPost 设置请求头

HttpPost httpPost = new HttpPost("地址");

if (headers != null) {

for (String key : headers.keySet()) {

httpPost.setHeader(key, headers.get(key));

}

}

备注:只需要在map中设置相应的请求头内容即可。根据实际需要修改即可

求教java程序怎么向网页服务器发送请求

POST方式发送请求示例: String fullurl = url; //打开连接 URLConnection conn =new URL(fullurl).openConnection(); //设置通用的请求属性 conn.setRequestProperty("accept", "*/*"); conn.setRequestProperty("connection", "Keep-Alive"); conn.setRequestProperty("user-agent", "Mozilla/5.0 (Windows NT 6.1; WOW64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/42.0.2311.90 Safari/537.36"); //发送POST请求必须设置下面两行 conn.setDoInput(true); conn.setDoOutput(true); try ( //获取URLConnection对象对应的输出流 PrintWriter out = new PrintWriter(conn.getOutputStream());) { out.print(parm);//发送请求参数(key1=value1key2=value2) out.flush();//flush输出流的缓冲 } catch (Exception e) {} //获取响应头字段 MapString, ListString map = conn.getHeaderFields(); //根据输入流读取响应数据 InputStream is = conn.getInputStream();

java发送请求的介绍就聊到这里吧,感谢你花时间阅读本站内容,更多关于java发送请求模拟ip、java发送请求的信息别忘了在本站进行查找喔。

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发布于:2022-11-21,除非注明,否则均为首码项目网原创文章,转载请注明出处。