结对课堂练习-地铁查询系统（6）

最后是servlet的编写：

ServletZhan.java:

package Servlet;

import Date.Dao;
import Model.LineModel;
import com.alibaba.fastjson.JSONArray;
import com.alibaba.fastjson.JSONObject;

import javax.servlet.ServletException;
import javax.servlet.annotation.WebServlet;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import java.io.IOException;
import java.util.ArrayList;
import java.util.List;

@WebServlet("/ServletZhan")
public class ServletZhan extends HttpServlet {


    Dao da = new Dao();

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

        String zhantai = req.getParameter("Zname") ;



        List<String> data = new ArrayList<>();
        //1.定义一个json数组
        JSONArray jsonData = new JSONArray();

        data = da.selectzhantai(zhantai);


        for (int i = 0; i < data.size(); i++) {
            //2.定义json对象
            JSONObject object = new JSONObject();
            String ms = data.get(i);
            System.out.println(ms);
            object.put("xname", ms);
            //3.将所有的json对象存放在json数组jsonData中
            jsonData.add(object);
        }
        //4.返回json数组
        resp.setCharacterEncoding("UTF-8");
        resp.getWriter().write(jsonData.toString());;


    }

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

ServletXian.java:

package Servlet;

import Date.Dao;
import Model.LineModel;
import com.alibaba.fastjson.JSONArray;
import com.alibaba.fastjson.JSONObject;

import javax.servlet.ServletException;
import javax.servlet.annotation.WebServlet;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import java.io.IOException;
import java.sql.SQLException;
import java.util.ArrayList;
import java.util.List;
@WebServlet("/ServletXian")
public class ServletXian extends HttpServlet {

    public  Dao da = new Dao();

    @Override
    protected void doGet(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException {
        int no1 = Integer.parseInt( req.getParameter("Xid") );

        System.out.println(no1);

        LineModel data = new LineModel();
        //1.定义一个json数组
        JSONArray jsonData = new JSONArray();

        data = da.selectkluxian(no1);


        for (int i = 0; i < data.getStations().size(); i++) {
            //2.定义json对象
            JSONObject object = new JSONObject();
            String ms = data.getStations().get(i);
            System.out.println(ms);
            object.put("zname", ms);
            //3.将所有的json对象存放在json数组jsonData中
            jsonData.add(object);
        }
        //4.返回json数组
        resp.setCharacterEncoding("UTF-8");
        resp.getWriter().write(jsonData.toString());;
    }

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


    }
}
最后的效果：