<%--
Created by IntelliJ IDEA.
User: Administrator
Date: 2021/3/13
Time: 14:54
To change this template use File | Settings | File Templates.
--%>
<%@ page contentType="text/html;charset=UTF-8" language="java" %>
<html>
<head>
<title>$Title$</title>
<script type="text/javascript" src="js/jquery-3.4.1.js"></script>
<script type="text/javascript">
$(function () {
$("#pBtn").click(function () {
var pid = $("#pid").val();
$.ajax(
{
url:"search",
type:"get",
data:{
"pid":pid
},
dataType:"json",
success:function (resp) {
//resp是json对象
$("#pname").val(resp.name);
$("#pjiancheng").val(resp.jiancheng);
$("#pshenghui").val(resp.shenghui);
}
}
)
});
})
</script>
</head>
<body>
<table border="1">
<tr>
<td>城市编号：</td>
<td><input type="text" id="pid"> <input type="button" id="pBtn" value="搜索"></td>
</tr>
<tr>
<td>城市名称：</td>
<td><input type="text" id="pname"></td>
</tr>
<tr>
<td>简称：</td>
<td><input type="text" id="pjiancheng"></td>
</tr>
<tr>
<td>省会：</td>
<td><input type="text" id="pshenghui"></td>
</tr>
</table>
</body>
</html>
package com.demo.controller;
import com.demo.dao.ProvinceDao;
import com.demo.entity.Province;
import com.fasterxml.jackson.databind.ObjectMapper;
import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import java.io.IOException;
import java.io.PrintWriter;
public class SearchServlet extends HttpServlet {
protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
String pid = request.getParameter("pid");
Province p = null;
if (pid != null && !"".equals(pid)){
ProvinceDao dao = new ProvinceDao();
p = dao.getProvinceById(Integer.valueOf(pid));
}
ObjectMapper om = new ObjectMapper();
String jsonStr = om.writeValueAsString(p);
response.setContentType("application/json;charset=utf-8");
PrintWriter out = response.getWriter();
out.print(jsonStr);
}
}