request 获取的值是乱码

Question

import java.io.IOException;
import java.io.PrintWriter;import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;public class Login extends HttpServlet { /**
 * 
 */
private static final long serialVersionUID = 1392116269495894774L; @Override
protected void doPost(HttpServletRequest arg0, HttpServletResponse arg1)
throws ServletException, IOException {
// TODO Auto-generated method stub
login(arg0, arg1);
} @Override
protected void doGet(HttpServletRequest arg0, HttpServletResponse arg1)
throws ServletException, IOException {
// TODO Auto-generated method stub
login(arg0, arg1);
}
public void login(HttpServletRequest request, HttpServletResponse response) throws IOException{
request.setCharacterEncoding("gb2312");
System.out.println("*****************"+request.getParameter("username"));

PrintWriter out = response.getWriter();
out.print(request.getParameter("username"));
out.close();

}
} <servlet>
<servlet-name>login</servlet-name>
<servlet-class>Login</servlet-class>
</servlet>
<servlet-mapping>
<servlet-name>login</servlet-name>
<url-pattern>/login</url-pattern>
</servlet-mapping>直接服务器访问
http://localhost:8080/sort/login?username=中文名字
后台打印是乱码. 页面显示是正常的.
这个是怎么回事啊????

Answer 1

request.setCharacterEncoding("gb2312");
应该改为：request.setCharacterEncoding("GBK");

Answer 2

form请使用post请求

Answer 3

<from method="post" action="....">

Answer 4

用post请求是没有这些问题的。如果是get方式的，
设置服务器的编码方式，加过滤器，这样就没有乱码了

Answer 5

是地址传参啊！用这个URLDecoder 
URLEncoder 

Answer 6

java.net.URLDecoder
java.net.URLEncoder

Answer 7

用这个URLDecoder  
URLEncoder  

Answer 8

 public void login(HttpServletRequest request, HttpServletResponse response) throws IOException{
       try{
        request.setCharacterEncoding("gb2312");
        String username =new String(request.getParameter("username").getBytes("iso8859-1"),"gbk");
        System.out.println("*****************"+username );
        
        PrintWriter out = response.getWriter();
        out.print(request.getParameter("username"));
        out.close();
       }catch(Exception e){}  
    }

Answer 9

tomcat设置编码
<Connector port="8080" protocol="HTTP/1.1" 
               connectionTimeout="20000" 
               redirectPort="8443" 
               URIEncoding="gbk"/>

Answer 10

url传参，乱码是肯定的，用11的方法解决，或是java.net.URLDecoder  java.net.URLEncoder

Answer 11

request.setCharacterEncoding("gb2312");
String username =new String(request.getParameter("username").getBytes("iso8859-1"),"gbk");
楼主这样试试,应该可以解决你的问题.一般乱码可以用以下几种方式:
1.在页面上设置编码encoude="GBK"
2.request.setCharacterEncoding("gb2312");
3.在tomcat中修改
<Connector port="8080" protocol="HTTP/1.1"  
  connectionTimeout="20000"  
  redirectPort="8443"  
  URIEncoding="gbk"/>
4.使用过滤器.

Answer 12

顶
注意，要不都用gbk或gb2312或utf-8，保持编码一致

Answer 13

tomcat 设置  URIEncoding="gbk"

Answer 14

传中文的问题，也已转成uncode传过去  再转回来

Answer 15

String username = request.getParameter("username"));
username = new String(username .getBytes("ISO8859-1"));

Answer 16

我刚解决了你这个问题 我也把所有方法都试了，最后改了个tomcat xml配置 具体我忘了 把它改成utf-8

Answer 17

java 的编码最好设置成utf-8 

Answer 18

1.方法
public void login(HttpServletRequest request, HttpServletResponse response) throws IOException{ request.setCharacterEncoding("gb2312");
System.out.println("*****************"+new String(request.getParameter("username").getBytes("iso8859-1"),"gbk"));

PrintWriter out = response.getWriter();
out.print(request.getParameter("username"));
out.close();

}2.方法
D:\apache-tomcat-5.5.29\conf\server.xml搜索<!-- Define a non-SSL HTTP/1.1 Connector on port 8080 -->
加入 URIEncoding="gbk"<Connector port="8080" maxHttpHeaderSize="8192"
               maxThreads="150" minSpareThreads="25" maxSpareThreads="75"
               enableLookups="false" redirectPort="8443" acceptCount="100"
               connectionTimeout="20000" disableUploadTimeout="true" URIEncoding="gbk"/>以上两种方法是解决你直接没有页面访问SERVLET的方法.