Java如何实现URL带请求参数(get/post)及得到get和post请求url和参数列表的方法

Java如何实现URL带请求参数(get/post)及得到get和post请求url和参数列表的方法

具体代码如下所示：

public static String sendGet(String url,String param)

{

String result = "";

try{

String urlName = url + "?"+param;//

URL U = new URL(urlName);

URLConnection connection = U.openConnection();

connection.connect();

BufferedReader in = new BufferedReader(new InputStreamReader(connection.getInputStream()));

String line;

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

{

result += line;

}

in.close();

}catch(Exception e){

System.out.println("Helloword！！"+e);

}

return result;

}

public static String sendPost(String url,String param)

{

String result="";

try{

URL httpurl = new URL(url);

HttpURLConnection httpConn = (HttpURLConnection)httpurl.openConnection();

httpConn.setDoOutput(true);

httpConn.setDoInput(true);

PrintWriter out = new PyCzqcYrintWriter(httpConn.getOutputStream());

out.print(param);

out.flush();

out.close();

BufferedReader in = new BufferedReader(new InputStreamReader(httpConn.getInputStream()));

String line;

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

{

result += line;

}

in.close();

}catch(Exception e){

System.out.println("Helloword！"+e);

}

return result;

}

下面给大家介绍 java得到GET和POST请求URL和参数列表的方法

在servlet中GET请求可以通过HttpServletRequest的getRequestURL方法和getQueryString()得到完整的请求路径和请求所有参数列表，POST的需要getParameterMap()方法遍历得到，不论GET或POST都可以通过getRequestURL+getParameterMap()来得到请求完整路径

package com.zuidaima

import java.io.IOException;

import java.io.PrintWriter;

import java.util.Map;

import javax.servlet.ServletException;

import javax.servlet.http.HttpServlet;

import javax.servlet.http.HttpServletRequest;

import javax.servlet.http.HttpServletResponse;

public class GetParams extends HttpServlet {

private static final long serialVersionUID = 1L;

public GetParams() {

super();

}

protected void doGet(HttpServletRequest request,

HttpServletResponse response) throws ServletException, IOException {

PrintWriter writer = response.getWriter();

writer.println("GET " + request.getRequestURL() + " "

+ request.getQueryString());

Map params = request.getParameterMap();

String queryString = "";

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

String[] values = params.get(key);

for (int i = 0; i < values.length; i++) {

String value = values[i];

queryString += key + "=" + value + "&";

}

}

// 去掉最后一个空格

queryString = queryString.substring(0, queryString.length() - 1);

writer.println("GET " + request.getRequestURL() + " " + queryString);

}

protected void doPost(HttpServletRequest request,

HttpServletResponse response) throws ServletException, IOException {

PrintWriter writer = response.getWriter();

Map params = request.getParameterMap();

String queryString = "";

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

String[] values = params.get(key);

for (int i = 0; i < values.length; i++) {

String value = values[i];

queryString += key + "=" + value + "&";

}

}

// 去掉最后一个空格

queryString = queryString.substring(0, queryString.length() - 1);

writer.println("POST " + request.getRequestURL() + " " + queryString);

}

}

以上代码简单易懂，希望对大家学习 java post get url 请求参数的相关方法有所帮助，感谢大家一直以来对我们网站的支持，有你们的支持，我们会做的更好。

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