发布于 2016-07-23 12:03:56 | 573 次阅读 | 评论: 0 | 来源: 网友投递

这里有新鲜出炉的Java函数式编程,程序狗速度看过来!

Java程序设计语言

java 是一种可以撰写跨平台应用软件的面向对象的程序设计语言,是由Sun Microsystems公司于1995年5月推出的Java程序设计语言和Java平台(即JavaEE(j2ee), JavaME(j2me), JavaSE(j2se))的总称。


本文给大家介绍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,涉及到 java获取post请求参数的方法,感兴趣的朋友一起看看吧

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 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<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<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phperz网站的支持,有你们的支持,我们会做的更好。



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