servlet中文显示乱码问题

GetPostData.javapackage com.servlet;import java.io.IOException;
import java.io.PrintWriter;
import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;public class GetPostData extends HttpServlet {


    protected void processRequest(HttpServletRequest request, HttpServletResponse response)
    throws ServletException, IOException {
       response.setContentType("text/html;charset=gb2312");
       response.setCharacterEncoding("gb2312");
        PrintWriter out = response.getWriter();
        try {
            out.println("<html><body>\n"+
                    "<h1 >"+"get post data"+"</h1>\n"+
                    "<ul>\n"+
                    "<li><b>username</b>: "+
                    request.getParameter("username")+"\n"+
                    "<li><b>password</b>: "+
                    request.getParameter("password")+"\n"+
                    "</ul>\n"+
                    "</body></html>"
                    );
        } finally {
            out.close();
        }
    }      protected void doGet(HttpServletRequest request, HttpServletResponse response)
    throws ServletException, IOException {
        processRequest(request, response);
    }     protected void doPost(HttpServletRequest request, HttpServletResponse response)
    throws ServletException, IOException {
        processRequest(request, response);
    }    public String getServletInfo() {
        return "Short description";
    }
}

[<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
<html>
  <head>
    <title>多值变量提交</title>
    <meta http-equiv="Content-Type" content="text/html; charset=gb2312">
  </head>
  <body>
        <form name="form1" method="post" action="multichoice">
        <input type="checkbox" name="checkbox1" value="苹果">苹果
        <input type="checkbox" name="checkbox1" value="西瓜">西瓜
        <input type="checkbox" name="checkbox1" value="桃子">桃子
        <input type="checkbox" name="checkbox1" value="葡萄">葡萄
        <input type="submit" name="Submit" value="提交">
        <input type="reset" name="Reset" value="重置">
    </form>
  </body>
</html>

当你从前台读的中文到后面时是乱码，这时就需要做编码处理 new String(request.getParameter("username").getBytes("ISO-8859-1"),"UTF-8"))就可以了希望你能成功呵呵。。

晕，刚才代码复制错了package com.servlet;import java.io.IOException;
import java.io.PrintWriter;
import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;public class multiChoice extends HttpServlet {

     protected void processRequest(HttpServletRequest request, HttpServletResponse response)
    throws ServletException, IOException {
        response.setContentType("text/html;charset=gb2312");
        response.setCharacterEncoding("gb2312");
        PrintWriter out = response.getWriter();
        try {
           String[] paramValues=request.getParameterValues("checkbox1");
            String temp=new String("");
            for(int i=0;i<paramValues.length;i++)temp+=paramValues[i]+"";
            out.println("你喜欢吃的水果有："+temp+"。");
        } finally {
            out.close();
        }
    }     // <editor-fold defaultstate="collapsed" desc="HttpServlet methods. Click on the + sign on the left to edit the code.">
       @Override
    protected void doGet(HttpServletRequest request, HttpServletResponse response)
    throws ServletException, IOException {
        processRequest(request, response);
    }         protected void doPost(HttpServletRequest request, HttpServletResponse response)
    throws ServletException, IOException {        processRequest(request, response);    }       public String getServletInfo() {
        return "Short description";
    }// </editor-fold>}

比如说你的request.getParameterValues("checkbox1")的这个变量读取时因为有中文字符，所以可以重新编码下改为String[] paramValues=new String(request.getParameterValues("checkbox1").getBytes("ISO-8859-1"),"UTF-8");只要是遇到提交过来的有中文的都需要转换的。

在你processRquest方法中编码格式都设为UTF-8试试

如果是用post传值，Servlet中，取得表单值之前，使用request.setCharacterEncoding("UTF-8");就可以解决问题

但是用get还是会出现乱码！你就要用
String name = new String (name.getByte("iso-8859-1"),"utf-8");

调试易

servlet中文显示乱码问题

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