JSP中文乱码常见3个例子及其解决方法

2020-07-27 21:31:10

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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：