日期:2014-05-17  浏览次数:20687 次

java mysql 中文乱码问题 求高手指教
做了一个登录界面以下是代码:
login.jsp
HTML code

<%@ page contentType="text/html; charset=gb2312"%>
<%
request.setCharacterEncoding("gb2312");
%>
<!-- 该Login页面是一个简单的登录界面 -->
<!--
 该JSP程序是用来测试与MySQL数据库的连接,
 需要一个数据库:LearnJSP,和其中一个表:userinfo
 表中有两个字段分别为:UserName varchar (20) not null,UserPwd varchar (20) not null
-->
<html>
  <head>
    <title>登录</title>
    <meta http-equiv="Content-Type" content="text/html; charset=gb2312">
    <meta http-equiv="Content-Language" content="ch-cn">
  </head>
  <body bgcolor=cyan>
 <!-- Form 用来提取用户填入并提交的信息-->
 <form method="POST" name="frmLogin" action="LoginServlet">
   <h1 align="center">用户登录</h1><br>
   <div align="center">用户名:
      <input type="text" name="txtUserName" value=""
       size="20" maxlength="20"
       onfocus="if(this.value=='Your name')this.value=";"><br>密码:
      <input type="password" name="txtPassword" value=""
       size="20" maxlength="20"
       onfocus="if(this.value=='Your password')this.value=";"><br>
      <input type="submit" name="Submit" value="提交" onClick="validateLogin();" >
       &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
      <input type="reset" name="Reset" value="重置"><br>
   </div>
 </form>
 <!-- javaScript 函数 validateLogin(),用来验证用户名和密码是否为空 -->
    <script language="javaScript">
     function validateLogin()
     {
      var sUserName = document.frmLogin.txtUserName.value;
      var sPassword = document.frmLogin.txtPassword.value;
      if( sUserName=="" )
      {
       alert("请输入用户名!");
       return false;
      }
      if( sPassword=="" )
      {
       alert("请输入密码!");
       return false;
      }
     }
    </script>
  </body>
</html>


LoginServlet.java
Java code

/**
 * 该JSP程序是用来测试与MySQL数据库的连接,
 * 需要一个数据库:LearnJSP,和其中一个表:userinfo
 * 表中有两个字段分别为:UserName varchar (20) not null,UserPwd varchar (20) not null
 */
package zieckey.login.servlet;
import java.sql.Statement;
import java.io.IOException;
import java.sql.DriverManager;
import java.sql.ResultSet;
import java.sql.SQLException;
import javax.servlet.Servlet;
import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
public class LoginServlet extends HttpServlet implements Servlet
{
 public LoginServlet ()
 {
  // TODO Auto-generated constructor stub
 
 }
 /*
  * (non-Javadoc)
  *
  * @see javax.servlet.http.HttpServlet#doGet(javax.servlet.http.HttpServletRequest,
  * javax.servlet.http.HttpServletResponse)
  */
 @Override

 protected void doGet ( HttpServletRequest arg0, HttpServletResponse arg1 )
   throws ServletException, IOException
 {
     
 }
 /*
  * (non-Javadoc)
  *
  * @see javax.servlet.http.HttpSer