HttpURLConnection 提交表单，没响应
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test.html的ACTION 是指向test1.html，可返回的sTotalString还是test.html
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URL url = new URL("http://localhost/www/test.html");
URLConnection connection = url.openConnection();
HttpURLConnection url_h =(HttpURLConnection)url.openConnection();
url_h.setRequestMethod("POST");
url_h.setDoOutput(true);
byte[] b = "username=wwww&password=aaaaa".toString().getBytes();
url_h.getOutputStream().write(b, 0, b.length);
url_h.getOutputStream().flush();
url_h.getOutputStream().close();
connection = url.openConnection();
String sCurrentLine;
String sTotalString;
sCurrentLine = "";
sTotalString = "";
InputStream l_urlStream;
l_urlStream = url_h.getInputStream();
BufferedReader l_reader = new BufferedReader(new InputStreamReader(l_urlStream));
while ((sCurrentLine = l_reader.readLine()) != null)
sTotalString += sCurrentLine + "\r\n";
System.out.println(sTotalString);
在form那里跳转的，action 属性
你在哪里跳转的？ 参考技术B 同楼上的:
URL url = new URL("http://localhost/www/test.html");
=>
URL url = new URL("http://localhost/www/test1.html");
android中的HttpUrlConnection的使用之四
1.首先分析原因：这是因为当我们提交数据时，数据编码格式是iso-8859-1，而服务器那边数据的编码格式是utf-8格式。因此我们想不会出现这种情况的话，必须进行数据转码
2.数据转码：服务器后台收到数据我们应该使用相应的方法，将原来的数据格式从iso-8859-1格式转化为utf-8.
Java代码（这个是servlet的Java代码 是服务器的代码，不是客户端）
1 package com.Servlet; 2 3 import java.io.IOException; 4 import java.io.PrintWriter; 5 6 import javax.servlet.ServletException; 7 import javax.servlet.http.HttpServlet; 8 import javax.servlet.http.HttpServletRequest; 9 import javax.servlet.http.HttpServletResponse; 10 11 /** 12 * Servlet implementation class Servlet 13 */ 14 public class Servlet extends HttpServlet { 15 private static final long serialVersionUID = 1L; 16 17 /** 18 * @see HttpServlet#HttpServlet() 19 */ 20 public Servlet() { 21 super(); 22 // TODO Auto-generated constructor stub 23 } 24 25 /** 26 * @see HttpServlet#doGet(HttpServletRequest request, HttpServletResponse response) 27 */ 28 protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException { 29 //调用下面的doPost方法 30 this.doPost(request, response); 31 } 32 33 /** 34 * @see HttpServlet#doPost(HttpServletRequest request, HttpServletResponse response) 35 */ 36 protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException { 37 //从request中分别获得name age属性 38 String name = request.getParameter("name"); 39 String age = request.getParameter("age"); 40 response.setContentType("text/html;charset=utf-8"); 41 PrintWriter pw = response.getWriter(); 42 //再网页上显示相应的信息 43 System.out.println(new String (name.getBytes("iso-8859-1"), "UTF-8")); 44 pw.println("name = " + new String (name.getBytes("iso-8859-1"), "UTF-8") + " age = " + age); 45 //在控制上显示相应的信息 46 System.out.println("11name = " + new String(name.getBytes("iso-8859-1"), "utf-8")); 47 System.out.println("age = " + age); 48 } 49 50 }
将代码改成这样过后，我们再去测试，如果发现在网页显示的是正确的，而控制台上显示的却是乱码。这个是为什么呢？
那是因为在编码的时候， jsp文件按照的是iso-8859-1的格式编码，因此要改变它的编码格式。只需将下面的红色部分改变了就是了。
jsp代码
1 <%@ page language="java" contentType="text/html; charset=UTF-8" 2 pageEncoding="ISO-8859-1"%> 3 <!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd"> 4 <html> 5 <head> 6 <meta http-equiv="Content-Type" content="text/html; charset=UTF-8"> 7 <title>Insert title here</title> 8 </head> 9 <body> 10 11 <form action="Servlet" method = "get"> 12 name:<input type = "text" name = "name"><br> 13 age:<input type = "text" name = "age"><br> 14 submit:<input type = "submit" value = "submit"><br> 15 </form> 16 </body> 17 </html>
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