JSP中文乱码常见3个例子及其解决方法

网络编程 2024/12/23 佚名

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常见3个例子及其解决方法如下

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：&nbsp;<input type="text"name="email" id="email"/><p/> 
      <p>昵称：&nbsp;<input type="text"name="nickname" id="nickname"/><p/> 
      <p>密码：&nbsp;<input type="password"name="password" id="password"/><p/> 
      <p>性别：&nbsp;<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：&nbsp;<% out.print(email); %><p/> 
      <p>昵称：&nbsp;<% out.print(nickname); %><p/> 
      <p>密码：&nbsp;<% out.print(password); %><p/> 
      <p>性别：&nbsp;<% 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：