jsp请求servlet地址时返回的中文为乱码时

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简介

当jsp请求servlet地址时放回的中文为乱码，首先我数据库中的编码格式为utf-8，包括jsp，myeclipse，servlet，都设置了这个编码，菜鸟小编最终百度到解决办法，直接上代码。

jsp

package application.admin.servlet.cate;import java.io.*;import javax.servlet.*;import javax.servlet.annotation.WebServlet;import javax.servlet.http.*;import org.json.JSONArray;import application.admin.cate.Cate;import common.api.CommonApi;@WebServlet("/CateListServlet")public class CateListServlet extends HttpServlet {   private String json_data;   public void init() throws ServletException   {   }   public void doGet(HttpServletRequest request,                     HttpServletResponse response)             throws ServletException, IOException   {        request.setCharacterEncoding("UTF-8");        response.setCharacterEncoding("UTF-8");        response.setContentType("text/html; charset=UTF-8");        response.setHeader("Content-Type", "text/html; charset=UTF-8");        JSONArray book_cate_list;        String user_id = request.getParameter("user_id");        String state = request.getParameter("state");        Cate cate = new Cate();        try {            book_cate_list = cate.book_cate_list();//获取所有图书分类            int count_cate = cate.count_cate();//统计图书分类个数            json_data = CommonApi.return_json(book_cate_list,count_cate);//拼装返回数据        } catch (Exception e) {            // TODO Auto-generated catch block            e.printStackTrace();        }        response.getOutputStream().write(json_data.getBytes("utf-8"));    }   public void destroy()   {       // 什么也不做   }}

servlet

package application.admin.servlet.cate;import java.io.*;import javax.servlet.*;import javax.servlet.annotation.WebServlet;import javax.servlet.http.*;import org.json.JSONArray;import application.admin.cate.Cate;import common.api.CommonApi;@WebServlet("/CateListServlet")public class CateListServlet extends HttpServlet {   private String json_data;   public void init() throws ServletException   {   }   public void doGet(HttpServletRequest request,                     HttpServletResponse response)             throws ServletException, IOException   {        request.setCharacterEncoding("UTF-8");        response.setCharacterEncoding("UTF-8");        response.setContentType("text/html; charset=UTF-8");        response.setHeader("Content-Type", "text/html; charset=UTF-8");        JSONArray book_cate_list;        String user_id = request.getParameter("user_id");        String state = request.getParameter("state");        Cate cate = new Cate();        try {            book_cate_list = cate.book_cate_list();//获取所有图书分类            int count_cate = cate.count_cate();//统计图书分类个数            json_data = CommonApi.return_json(book_cate_list,count_cate);//拼装返回数据        } catch (Exception e) {            // TODO Auto-generated catch block            e.printStackTrace();        }        response.getOutputStream().write(json_data.getBytes("utf-8"));    }   public void destroy()   {       // 什么也不做   }}

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