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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

2019年07月22日  | 移动技术网IT编程  | 我要评论

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移动技术网网站的支持，有你们的支持，我们会做的更好。

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