输入了中文显示不出!

Question

<%@page contentType="text/html;charset=gb2312" %>
<%
request.setCharacterEncoding("gb2312");
out.println(request.getParameter("name"));
%>
用了这个依然存在输入中文时出现"???"这是什么原因?

Answer 1

<%@ page contentType="text/html;charset=gb2312" language= "java" import= "java.until.*,java.sql.*,javax.servlet.*,javax.servlet.http.*" pageEncoding="GB2312" %> 
<% 
request.setCharacterEncoding("gb2312");
%> 
<meta http-equiv="Content-Type"content="text/html;charset=gb2312">
<h2>一个简单的聊天室</h2>
<font>
<%
String content=(String)getServletContext().getAttribute(new String("chatTopic_1"));
out.println(content);
getServletContext().setAttribute("chatTopic_1",content+(String)request.getParameter("content")+"<br>");
%>
</font>
<form action="request.jsp">
<input type=text name=content>
<input type=submit value="请说话">
还有这个不行~

Answer 2

String aa=(String)request.getAttribute("aaa");
byte b[]=aa.getBytes();
String bb=new String(b);
out.print(bb);

Answer 3

request.getParameter( "content ")这个 需要 进行 编码处理

Answer 4

<%@page   contentType= "text/html;charset=gb2312"   %> 
<% 
request.setCharacterEncoding("gb2312"); 
out.println(new String(request.getParameter( "name").getBytes("iso-8859-1"),"gb2312")); 
%> 
这样试下

Answer 5

上面所说的方面出现这个错!
org.apache.jasper.JasperException
org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:370)
org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:291)
org.apache.jasper.servlet.JspServlet.service(JspServlet.java:241)
javax.servlet.http.HttpServlet.service(HttpServlet.java:802)