代码改变世界

常见JSP中文乱码例子及其解决方法

2012-03-20 22:03  java线程例子  阅读(295)  评论(0编辑  收藏  举报

JSP开发应用是,中文乱码是个比较常见的问题,其根源是:Web容器默认的字符处理编码是ISO-8859-1。

实例一、JSP页面显示时

<html>
    <head>
       <title>中文乱码——JSP页面显示时</title>
    </head>
    <body>
       <center>
           <br/>
           <h1>木兰辞拟古决绝词柬友</h1>
           <p>人生若只如初见,何事秋风悲画扇。</p>
         <p>等闲变却故人心,却道故人心易变。</p>
         <p>骊山语罢清宵半,泪雨霖铃终不怨。</p>
         <p>何如薄幸锦衣郎,比翼连枝当日愿。</p>
       </center>
    </body>
</html>

运行结果:

 

解决方法:为其指定中文字符集,<html>前加入

<%@ page contentType="text/html;charset=gb2312" %>


实例二、JSP页面传递中文参数时

注册页面:

<%@ page contentType="text/html;charset=gb2312" %>
<html>
    <head>
       <title>中文乱码——JSP页面传递中文参数时</title>
    </head>
    <body>
       <h2>申请账号:</h2>
       <form action="userMsg.jsp" method="POST">
           <p>邮箱: <input type="text"name="email" id="email"/><p/>
           <p>昵称: <input type="text"name="nickname" id="nickname"/><p/>
           <p>密码: <input type="password"name="password" id="password"/><p/>
           <p>性别: <input type="radio"name="sex" id="sex"value="男" /> 男
                         <input type="radio" name="sex"id="sex" value="女" /> 女<p/>
           <textarea  name="introduction"id="introduction" rows="5" cols="27">一句话介绍自己...</textarea>
           <p><input type="submit"value="提交申请"></p>
       </form>
    </body>
</html>

个人信息页面:

<%@ page contentType="text/html;charset=gb2312" %>
<html>
    <head>
       <title>中文乱码——JSP页面传递中文参数时 </title>
    </head>
    <body>
       <center>
           <h2>用户信息:</h2>
           <% String email = request.getParameter("email"); %>
           <% String nickname = request.getParameter("nickname"); %>
           <% String password = request.getParameter("password"); %>
           <% String sex = request.getParameter("sex"); %>
           <% String introduction = request.getParameter("introduction");%>
           <p>邮箱: <% out.print(email); %><p/>
           <p>昵称: <% out.print(nickname); %><p/>
           <p>密码: <% out.print(password); %><p/>
           <p>性别: <% out.print(sex); %><p/>
           <p>个人介绍:<%out.print(introduction); %></p>
       </center>
    </body>
</html>

运行结果:

解决方法:修改个人信息页面如下

<%@ page contentType="text/html;charset=gb2312" %>
<html>
    <head>
       <title>中文乱码——JSP页面传递中文参数时 </title>
    </head>
    <body>
       <h2>用户信息:</h2>
       <% String email = newString(request.getParameter("email").getBytes("ISO-8859-1"), "gb2312");%>
       <% String nickname = newString(request.getParameter("nickname").getBytes("ISO-8859-1"), "gb2312");%>
       <% String password = newString(request.getParameter("password").getBytes("ISO-8859-1"), "gb2312");%>
       <% String sex = newString(request.getParameter("sex").getBytes("ISO-8859-1"), "gb2312");;%>
       <% String introduction = newString(request.getParameter("introduction").getBytes("ISO-8859-1"), "gb2312");;%>
       <p>邮箱: <% out.print(email); %><p/>
       <p>昵称: <% out.print(nickname); %><p/>
       <p>密码: <% out.print(password); %><p/>
       <p>性别: <% out.print(sex); %><p/>
       <p>个人介绍:<%out.print(introduction); %></p>
    </body>
</html>


实例三、Servlet处理中文参数时

注册页面:

<%@ page contentType="text/html;charset=gb2312" %>
<%@ page import="test.UserMsg"%>
<html>
    <head>
       <title>中文乱码——JSP页面传递中文参数时</title>
    </head>
    <body>
       <h2>申请账号:</h2>
       <form action="./UserMsg" method="POST">
           <p>邮箱: <input type="text"name="email" id="email"/><p/>
           <p>昵称: <input type="text"name="nickname" id="nickname"/><p/>
           <p>密码: <input type="password"name="password" id="password"/><p/>
           <p>性别: <input type="radio"name="sex" id="sex"value="男" /> 男
                         <input type="radio" name="sex"id="sex" value="女" /> 女<p/>
           <textarea  name="introduction"id="introduction" rows="5" cols="27">一句话介绍自己...</textarea>
           <p><input type="submit"value="提交申请"></p>
       </form>
    </body>
</html>

UserMsg.java(Servlet)

package test;
 
importjava.io.IOException;
importjava.io.PrintWriter;
importjava.io.UnsupportedEncodingException;
 
importjavax.servlet.http.HttpServlet;
importjavax.servlet.http.HttpServletRequest;
importjavax.servlet.http.HttpServletResponse;
public classUserMsg extends HttpServlet{
      public void doGet(HttpServletRequestrequest,
                 HttpServletResponse response){
           doPost(request, response);
      }
      public void doPost(HttpServletRequestrequest,
                 HttpServletResponse response){
           try {
                 request.setCharacterEncoding("gb2312");
           } catch (UnsupportedEncodingExceptione) {
                 e.printStackTrace();
           }
           PrintWriter out = null;
           try {
                 out = response.getWriter();
           } catch (IOException e1) {
                 e1.printStackTrace();
           }
           out.print("<html>");
           out.print("<body>");
           out.print("<h2>" +"用户信息:"+ "</h2>");
           out.print("<p>"+"邮箱:"+request.getParameter("email")+"<p/>");
           out.print("<p>"+"昵称:"+request.getParameter("nickname")+"<p/>");
           out.print("<p>"+"密码:"+request.getParameter("password")+"<p/>");
           out.print("<p>"+"性别:"+request.getParameter("sex")+"<p/>");
           out.print("<p>"+"个人介绍:"+request.getParameter("introduction")+"<p/>");
           out.print("</html>");
           out.print("</body>");
      }
}
运行结果:


解决方法:在doPost中加入:

response.setContentType("text/html; charset=gb2312");