java servlet处理后返回jason

来源：互联网发布：u盘数据剪切如何恢复编辑：程序博客网时间：2024/06/05 07:34

依赖，sservlet-spi.jar ,json.jar

servlet代码

package com.test.servlet;

import java.io.IOException;
import java.io.PrintWriter;
import java.util.Map;

import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import javax.servlet.http.HttpSession;

import com.test.util.JdbcUtils;

public class NewIndexAspxServlet extends HttpServlet {

   private static final long serialVersionUID = 1L;
   public static int TIME_OUT=3600;


   @Override
   protected void doGet(HttpServletRequest req, HttpServletResponse resp)
           throws ServletException, IOException {
       doPost(req, resp);

   }

   @Override
   protected void doPost(HttpServletRequest req, HttpServletResponse resp)
           throws ServletException, IOException {

       resp.setCharacterEncoding("UTF-8");
       HttpSession session = req.getSession();
       String username = req.getParameter("UserLogin1$txtuserid");
       boolean vip = false;
       try{
       long l = Long.valueOf(username);
       vip = true;
       }catch(Exception e){
       }

       String password = req.getParameter("UserLogin1$txtpwd");
       String check = req.getParameter("UserLogin1$txtcode");
       String passwordFromDB = JdbcUtils.getPwd(username);
       Map<String, String> firstCardMap = JdbcUtils.getFirstCard(username);
       String firstCard = firstCardMap.get("asn");
       session.setAttribute("username", username);
       session.setAttribute("vip", vip);
       if(firstCard !=null){
           session.setAttribute("currentCard", firstCard);
       }

       String html = "";
       if( !check.equals("q0g2")){
           html = "验证码错误";
       }else {
           if (passwordFromDB==null || !passwordFromDB.equals(password)) {
               html="用户名或密码错误";
           }else{
               html="本次登录是您本日第";
               if(vip){
                   html+="金卡客户";
               }
           }
       }

       html="<html>"+html+"</html>";
       PrintWriter out = null;
       try {
           out = resp.getWriter();
           out.write(html);
       } catch (IOException e) {
           e.printStackTrace();
       } finally {
           if (out != null) {
               out.close();
           }
       }

   }

}

jdbc 代码

public static Map<String, String> getFirstCard(String account) {
       Map<String, String> map = new HashMap<String, String>();
       String sql = "select card_no,status from p_card_info where card_account=? and card_type=?";

       try {
           conn = JdbcUtils.getConnection();
           PreparedStatement ps = conn.prepareStatement(sql);
           ps.setString(1, account);
           ps.setString(2, "zsy");
           rs = ps.executeQuery();

           if (rs.next()) {
               String asn = rs.getString(1);
               String cardStatus = rs.getString(2);
               map.put("driverName", "");
               map.put("asn", asn);
               map.put("isMaster", "是");
               map.put("cardStatus", cardStatus);

           }

       } catch (Exception e) {
           e.printStackTrace();
       } finally {

           JdbcUtils.release(conn, st, rs);
       }

       return map;
   }

web.xml

<servlet>
       <servlet-name>NewIndexAspxServlet</servlet-name>
       <servlet-class>com.test.servlet.NewIndexAspxServlet</servlet-class>
   </servlet>

   <servlet-mapping>
       <servlet-name>NewIndexAspxServlet</servlet-name>
       <url-pattern>/NewIndex.aspx</url-pattern>
   </servlet-mapping>

结果：

0 0