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Java如何實(shí)現(xiàn)URL帶請(qǐng)求參數(shù)(get/post)及得到get和post請(qǐng)求url和參數(shù)列表的方法

更新時(shí)間：2015年10月26日 09:51:42 投稿：mrr

本文給大家介紹Java如何實(shí)現(xiàn)URL帶請(qǐng)求參數(shù)(get/post)及得到get和post請(qǐng)求url和參數(shù)列表的方法，涉及到 java獲取post請(qǐng)求參數(shù)的方法，感興趣的朋友一起看看吧

具體代碼如下所示：

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 PrintWriter(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;
 }

下面給大家介紹 java得到GET和POST請(qǐng)求URL和參數(shù)列表的方法

在servlet中GET請(qǐng)求可以通過HttpServletRequest的getRequestURL方法和getQueryString()得到完整的請(qǐng)求路徑和請(qǐng)求所有參數(shù)列表，POST的需要getParameterMap()方法遍歷得到，不論GET或POST都可以通過getRequestURL+getParameterMap()來得到請(qǐng)求完整路徑

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<String, String[]> 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 + "&"; 
   } 
  } 
  // 去掉最后一個(gè)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<String, String[]> 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 + "&"; 
   } 
  } 
  // 去掉最后一個(gè)空格 
  queryString = queryString.substring(0, queryString.length() - 1); 
  writer.println("POST " + request.getRequestURL() + " " + queryString); 
 } 
}

以上代碼簡(jiǎn)單易懂，希望對(duì)大家學(xué)習(xí) java post get url 請(qǐng)求參數(shù)的相關(guān)方法有所幫助，感謝大家一直以來對(duì)腳本之家網(wǎng)站的支持，有你們的支持，我們會(huì)做的更好。

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