效果图：
我在服务器上设置了10点和18点的定时任务，及时爬取疫情数据，数据爬取的相关内容在上一篇博客。
这里提供国家、省份和城市的筛选，现存确诊、累计确诊、累计治愈和死亡人数的排序。
1、前端界面用了bootstrap4框架，通过ajax实现数据实时交互。
<%@page import="java.util.ArrayList"%>
<%@page import="java.sql.Date"%>
<%@ page language="java" contentType="text/html; charset=UTF-8"
pageEncoding="UTF-8"%>
<%@ taglib uri="http://java.sun.com/jsp/jstl/core" prefix="c"%>
<!DOCTYPE html>
<html>
<head>
<meta charset="UTF-8">
<title>主界面</title>
<meta name="viewport" content="width=device-width, initial-scale=1">
<link rel="stylesheet"
href="https://cdn.staticfile.org/twitter-bootstrap/4.3.1/css/bootstrap.min.css">
<script src="https://cdn.staticfile.org/jquery/3.2.1/jquery.min.js"></script>
<script src="https://cdn.bootcss.com/jquery/3.2.1/jquery.min.js"></script>
<script
src="https://cdn.staticfile.org/popper.js/1.15.0/umd/popper.min.js"></script>
<script
src="https://cdn.staticfile.org/twitter-bootstrap/4.3.1/js/bootstrap.min.js"></script>
<script src="https://cdn.staticfile.org/echarts/4.3.0/echarts.min.js"></script>
</head>
<script type="text/javascript">
function Query(id){
var valu,date,type;
switch(id){
case "btnquerycontury":{
valu=$('#querycontury').val();
if($('#querydate').val()==null||$('#querydate').val()==""){
date="1";
}else{
date=$('#querydate').val();
}
type="contury";
break;
}
case "btnquerycity":{
valu=$('#querycity').val();
if($('#querydate').val()==null||$('#querydate').val()==""){
date="1";
}else{
date=$('#querydate').val();
}
type="city";
break;
}
case "btnqueryprovince":{
valu=$('#queryprovince').val();
if($('#querydate').val()==null||$('#querydate').val()==""){
date="1";
}else{
date=$('#querydate').val();
}
type="province";
break;
}
case "btnquerydate":{
valu=$('#dropdown').val();
type="date";
date=$('#querydate').val();
break;
}
};
valu=encodeURI(valu);
$.ajax({
type : "POST",
async : true,
url : "Query?valu=" + valu +"&date=" + date+"&type="+type,
success : function(data) {
var obj = eval(data);
var tbody = $('<tbody></tbody>');
$(obj).each(
function(index) {
var val = obj[index];
var tr = $('<tr></tr>');
tr.append('<td>' + val.state + '</td>' + '<td>'
+ val.name + '</td>' + '<td>'
+ val.confirm + '</td>' + '<td>'
+ val.current + '</td>' + '<td>'
+ val.suspect + '</td>' + '<td>'
+ val.cured + '</td>' + '<td>'
+ val.dead + '</td>' + '<td>'
+ val.date + '</td>');
tbody.append(tr);
});
$('#mytable tbody').replaceWith(tbody);
},
error: function(){
alert("查询失败！");
}
});
}
function refreshTable(valu, order, updown) {
$.ajax({
type : "POST",
async : true,
url : "GetData?valu=" + valu + "&order=" + order + "&updown="
+ updown,
success : function(data) {
{
var obj = eval(data);
var tbody = $('<tbody></tbody>');
$(obj).each(
function(index) {
var val = obj[index];
var tr = $('<tr></tr>');
tr.append('<td>' + val.state + '</td>' + '<td>'
+ val.name + '</td>' + '<td>'
+ val.confirm + '</td>' + '<td>'
+ val.current + '</td>' + '<td>'
+ val.suspect + '</td>' + '<td>'
+ val.cured + '</td>' + '<td>'
+ val.dead + '</td>' + '<td>'
+ val.date + '</td>');
tbody.append(tr);
});
$('#mytable tbody').replaceWith(tbody);
if (valu == "city") {
$('#wuhannow').replaceWith(
$('<p>注：武汉现存：' + obj[0].current + '</p>'));
$('#dropdown').val("city");
$('#dropdown').text("城市");
$('#stat').text("省份");
$('#cont').text("城市");
} else if (valu == "province") {
$('#hubeinow').replaceWith(
$('<p>注：湖北现存：' + obj[0].current + '</p>'));
$('#dropdown').val("province");
$('#dropdown').text("省份");
$('#stat').text("大洲");
$('#cont').text("省份");
} else {
$('#dropdown').val("out");
$('#dropdown').text("国家");
$('#stat').text("大洲");
$('#cont').text("国家");
}
}
}
});
}
function refreshChart(valu, order, updown) {
//判断是否为排序筛选传来的消息
if (valu == "aaa") {
valu = $('#dropdown').val();
$('#dropdown_order').val(order);
updown=$('#dropdown_updown').val();
switch (order) {
case "currentt": {
$('#dropdown_order').text("现存数排序");
break;
}
case "cured": {
$('#dropdown_order').text("治愈数排序");
break;
}
case "confirmm": {
$('#dropdown_order').text("总确诊排序");
break;
}
case "dead": {
$('#dropdown_order').text("死亡数排序");
break;
}
}
}else if(valu=="bbb"){
valu = $('#dropdown').val();
order = $('#dropdown_order').val();
$('#dropdown_updown').val(updown);
if(updown=="ASC"){
$('#dropdown_updown').text("升序");
}else{
$('#dropdown_updown').text("降序");
}
}else{
order = $('#dropdown_order').val();
updown = $('#dropdown_updown').val();
}
refreshTable(valu, order, updown);
$.ajax({
type : "POST",
async : true, //异步执行
url : "ShowData?q=" + valu+"&order="+order+"&updown="+updown,
dataType : "json", //返回数据形式为json
success : function(json) {
if (json) {
myChart.hideLoading();
myChart.setOption({
xAxis : {
data : json.xAxisData
},
series : json.seriesList
});
}
},
error : function(errorMsg) {
alert("请求数据失败" + errorMsg);
}
})
myChart.setOption(option);
}
</script>
<body onload="refreshChart('out','currentt','DESC')">
<div class="container-fluid" align="center">
<div id="echart" style="width: 2000px; height: 300px;"></div>
<script type="text/javascript">
// 基于准备好的dom，初始化echarts实例
var myChart = echarts.init(document.getElementById('echart'));
// 指定图表的配置项和数据
// 初始 option
option = {
title : {
text : '小高的疫情统计——数据从3.20日开始爬取，每天10点、18点更新（app排序bug已修复，稍后提供下载链接）'
},
tooltip : {},
legend : {
data : [ ]
},
xAxis : {
type : "category",
data : []
},
yAxis : [ {
type : "value",
} ],
series : [ {
name : "人数",
type : "bar",
data : []
} ]
};
myChart.showLoading();
</script>
<div class="container" align="center"
style="margin-bottom: 20px; margin-left: 200px;" align="center">
<!-- //异步查询区域-->
<div class="container">
<div style="width: 100px; float: left; margin-right: 10px;"
class="container">
<div class="dropdown">
<button class="btn btn-primary dropdown-toggle" role="button"
id="dropdown" data-toggle="dropdown" aria-haspopup="true"
aria-expanded="false" value="out">区域</button>
<div class="dropdown-menu" aria-labelledby="dropdownMenuLink">
<button class="dropdown-item" value="out"
onClick="refreshChart(this.value,'currentt','DESC')">国外</button>
<button class="dropdown-item" value="province"
onClick="refreshChart(this.value,'currentt','DESC')">省份(除湖北)</button>
<button class="dropdown-item" value="city"
onClick="refreshChart(this.value,'currentt','DESC')">城市(除武汉)</button>
</div>
</div>
<br>
<div class="dropdown">
<button class="btn btn-primary dropdown-toggle" role="button"
id="dropdown_order" data-toggle="dropdown" aria-haspopup="true"
aria-expanded="false" value="currentt">排序依据</button>
<div class="dropdown-menu" aria-labelledby="dropdownMenuLink">
<button class="dropdown-item" value=currentt id="current"
onClick="refreshChart('aaa','currentt','DESC')">现存确诊</button>
<button class="dropdown-item" value="confirmm" id="confirm"
onClick="refreshChart('aaa','confirmm','DESC')">确诊总数</button>
<button class="dropdown-item" value="dead" id="dead"
onClick="refreshChart('aaa','dead','DESC')">死亡数</button>
<button class="dropdown-item" value="cured" id="cured"
onClick="refreshChart('aaa','cured','DESC')">治愈数</button>
</div>
</div>
<br>
<div class="dropdown">
<button class="btn btn-primary dropdown-toggle" role="button"
id="dropdown_updown" data-toggle="dropdown" aria-haspopup="true"
aria-expanded="false" value="DESC">排序方向</button>
<div class="dropdown-menu" aria-labelledby="dropdownMenuLink">
<button class="dropdown-item" value=currentt id="current"
onClick="refreshChart('bbb','currentt','DESC')">降序</button>
<button class="dropdown-item" value="confirmm" id="confirm"
onClick="refreshChart('bbb','confirmm','ASC')">升序</button>
</div>
</div>
</div>
<!-- 文字描述 -->
<div style="float: left; margin-left: 30px;" align="left">
<p id="wuhannow">注：武汉现存：</p>
<p id="hubeinow"> 湖北现存：</p>
<p>国家选项图表中只显示确诊数前50的国家，</p>
<p>其他国家请在右侧的查询框查询或自己查下面的表哦~</p>
</div>
</div>
<div class="container"
style="margin-bottom: 20px; margin-left: 200px;" align="center">
<!-- 查询表格 -->
<input type="text" name="city" placeholder="国家查询" id="querycontury"
style="width: 250px; margin: 10px;"> <input
type="button" value="查询" class="btn btn-outline-primary" id="btnquerycontury"
style="width: 250px;" onClick="Query(this.id)"><br> <input type="text" id="queryprovince"
name="province" placeholder="(国内)省份查询：格式：xx省或xx市"
style="width: 250px; margin: 10px;"> <input id="btnqueryprovince"
type="button" value="查询" class="btn btn-outline-primary"
style="width: 250px;" onClick="Query(this.id)"><br> <input type="text" id="querycity"
name="city" placeholder="(国内)城市查询：格式：xx区或xx市"
style="width: 250px; margin: 10px;"> <input id="btnquerycity"
type="button" value="查询" class="btn btn-outline-primary"
style="width: 250px;" onClick="Query(this.id)"><br> <input type="text" id="querydate"
name="city" placeholder="日期查询：格式：yyyy-mm-dd"
style="width: 250px; margin: 10px;"> <input id="btnquerydate"
type="button" value="查询" class="btn btn-outline-primary"
style="width: 250px;" onClick="Query(this.id)">
</div>
</div>
<!-- 展示表格 -->
<table class="table table-hover" id="mytable">
<thead>
<tr>
<td id="stat">大洲</td>
<td id="cont">国家</td>
<td>累计确诊</td>
<td>现存确诊</td>
<td>疑似病例</td>
<td>累计治愈</td>
<td>死亡人数</td>
<td>时间</td>
</tr>
</thead>
<tbody></tbody>
</table>
</div>
</body>
</html>
2、后端主要是查询数据库然后发送给前端。
两个类，一个用了更新图表，一个用了更新表格
GetData.java
package com.data.java;
import java.io.IOException;
import java.lang.Thread.State;
import java.sql.Connection;
import java.sql.Date;
import java.sql.ResultSet;
import java.sql.SQLException;
import java.sql.Statement;
import java.util.ArrayList;
import java.util.List;
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 com.alibaba.fastjson.JSON;
import com.alibaba.fastjson.JSONArray;
import com.alibaba.fastjson.JSONObject;
@WebServlet("/GetData")
public class GetData extends HttpServlet {
private static final long serialVersionUID = 1L;
public GetData() {
super();
}
protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
}
protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
//更新图表
response.setHeader("Cache-Control", "no-cache");
request.setCharacterEncoding("utf-8");
response.setContentType("utf-8");
response.setCharacterEncoding("utf-8");
String type=request.getParameter("valu");
String ordertype=request.getParameter("order");
String updown=request.getParameter("updown");
try {
Connection con =BaseConnection.getConnection("VData");
Statement stmt = con.createStatement();
Date date = new Date((System.currentTimeMillis()));
JSONArray json=new JSONArray();
List<ProvinceBean> arr=new ArrayList<>();
switch(type) {
case "province":{
String sql="select * from province where date=(select max(date) from province) order by convert("+ordertype+",SIGNED) "+updown;
ResultSet rsst=stmt.executeQuery(sql);
while(rsst.next()) {
ProvinceBean pr=new ProvinceBean();
pr.setConfirm(rsst.getString("confirmm"));
pr.setCured(rsst.getString("cured"));
pr.setCurrent(rsst.getString("currentt"));
pr.setDate(rsst.getDate("date").toString());
pr.setDead(rsst.getString("dead"));
pr.setName(rsst.getString("name"));
pr.setState("亚洲");
pr.setSuspect(rsst.getString("suspect"));
arr.add(pr);
}
break;
}
case "city":{
String sql="select * from city where date=(select max(date) from city) order by convert("+ordertype+",SIGNED) "+updown;
ResultSet rsst=stmt.executeQuery(sql);
while(rsst.next()) {
ProvinceBean pr=new ProvinceBean();
pr.setConfirm(rsst.getString("confirmm"));
pr.setCured(rsst.getString("cured"));
pr.setCurrent(rsst.getString("currentt"));
pr.setDate(rsst.getDate("date").toString());
pr.setDead(rsst.getString("dead"));
pr.setName(rsst.getString("name"));
pr.setState(rsst.getString("province"));
pr.setSuspect(rsst.getString("suspect"));
arr.add(pr);
}
break;
}
case "out":{
String sql="select * from contury where date=(select max(date) from contury) order by convert("+ordertype+",SIGNED) "+updown;
System.out.println(sql);
ResultSet rsst=stmt.executeQuery(sql);
while(rsst.next()) {
ProvinceBean pr=new ProvinceBean();
pr.setConfirm(rsst.getString("confirmm"));
pr.setCured(rsst.getString("cured"));
pr.setCurrent(rsst.getString("currentt"));
pr.setDate(rsst.getDate("date").toString());
pr.setDead(rsst.getString("dead"));
pr.setName(rsst.getString("provincename"));
pr.setState(rsst.getString("continents"));
pr.setSuspect(rsst.getString("suspect"));
arr.add(pr);
}
break;
}
}
BaseConnection.close(stmt, con);
//通过print将json发送到前端
json=JSONArray.parseArray(JSON.toJSONString(arr));
System.out.println(json);
response.getWriter().print(json);
} catch (SQLException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}
}
ShowData.java
package com.data.java;
import java.io.IOException;
import java.io.PrintWriter;
import java.sql.Connection;
import java.sql.Date;
import java.sql.ResultSet;
import java.sql.SQLException;
import java.sql.Statement;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
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 com.alibaba.fastjson.JSONObject;
@WebServlet("/ShowData")
public class ShowData extends HttpServlet {
private static final long serialVersionUID = 1L;
public ShowData() {
super();
}
protected void doGet(HttpServletRequest request, HttpServletResponse response)
throws ServletException, IOException {
}
protected void doPost(HttpServletRequest request, HttpServletResponse response)
throws ServletException, IOException {
try {
response.setHeader("Cache-Control", "no-cache");
String valu = request.getParameter("q");
String order=request.getParameter("order");
String updown=request.getParameter("updown");
System.out.println(valu);
if (valu != null) {
}
request.setCharacterEncoding("utf-8");
response.setContentType("utf-8");
response.setCharacterEncoding("utf-8");
PrintWriter printWriter = response.getWriter();
List<String> xdata = new ArrayList<>();
List<String> data = new ArrayList<>();
List<com.alibaba.fastjson.JSONObject> seriesList = new ArrayList<com.alibaba.fastjson.JSONObject>();
Connection con=BaseConnection.getConnection("VData");
Statement stmt=con.createStatement();
Date date = new Date((System.currentTimeMillis()));
System.out.println(date);
System.out.println(111);
//省
if (valu.equals("province")) {
System.out.println("select * from province where date=(select max(date) from province) order by convert("+order+",SIGNED) "+updown);
ResultSet rsst = stmt.executeQuery(
"select * from province where date=(select max(date) from province) order by convert("+order+",SIGNED) "+updown);
rsst.next();
rsst.next();
while (rsst.next()) {
boolean flag = true;
for (int i = 0; i < data.size(); i++) {
if (xdata.get(i).equals(rsst.getString("name"))) {
flag = false;
}
}
if (flag) {
xdata.add(rsst.getString("name"));
data.add(rsst.getString(order));
}
}
Series series = new Series("现存确诊数", "TYPE_BAR", data);
com.alibaba.fastjson.JSONObject jsonObject = new com.alibaba.fastjson.JSONObject();
jsonObject.put("name", series.toName());
jsonObject.put("type", "bar");
jsonObject.put("data", series.data);
seriesList.add(jsonObject);
JSONObject jsonObject1 = new JSONObject();
jsonObject1.put("xAxisData", xdata);
jsonObject1.put("seriesList", seriesList);
// 发送给前台
printWriter.write(jsonObject1.toString());
printWriter.flush();
printWriter.close();
rsst.close();
stmt.close();
con.close();
}
// 国外数据
else if (valu.equals("out")) {
request.setCharacterEncoding("utf-8");
response.setContentType("utf-8");
response.setCharacterEncoding("utf-8");
System.out.println("select * from contury where date=(select max(date) from contury) order by convert("+order+",SIGNED) "+updown);
ResultSet rsst = stmt.executeQuery(
"select * from contury where date=(select max(date) from contury) order by convert("+order+",SIGNED) "+updown);
while (rsst.next()) {
boolean flag = true;
for (int i = 0; i < data.size(); i++) {
if (xdata.get(i).equals(rsst.getString("provincename"))) {
flag = false;
}
}
if (flag) {
xdata.add(rsst.getString("provincename"));
data.add(rsst.getString(order));
}
}
Series series = new Series("现存确诊数", "TYPE_BAR", data);
com.alibaba.fastjson.JSONObject jsonObject = new com.alibaba.fastjson.JSONObject();
jsonObject.put("name", series.toName());
jsonObject.put("type", "bar");
jsonObject.put("data", series.data);
seriesList.add(jsonObject);
JSONObject jsonObject1 = new JSONObject();
jsonObject1.put("xAxisData", xdata);
jsonObject1.put("seriesList", seriesList);
// 发送给前台
printWriter.write(jsonObject1.toString());
printWriter.flush();
printWriter.close();
rsst.close();
stmt.close();
con.close();
}
//市
else if(valu.equals("city")){
System.out.println("select * from city where date=(select max(date) from city) order by convert("+order+",SIGNED) "+updown);
ResultSet rsst = stmt.executeQuery(
"select * from city where date=(select max(date) from city) order by convert("+order+",SIGNED) "+updown);
rsst.next();
while (rsst.next()) {
boolean flag = true;
for (int i = 0; i < data.size(); i++) {
if (xdata.get(i).equals(rsst.getString("name"))) {
flag = false;
}
}
if (flag) {
xdata.add(rsst.getString("name"));
data.add(rsst.getString(order));
}
}
Series series = new Series("现存确诊数", "TYPE_BAR", data);
com.alibaba.fastjson.JSONObject jsonObject = new com.alibaba.fastjson.JSONObject();
jsonObject.put("name", series.toName());
jsonObject.put("type", "bar");
jsonObject.put("data", series.data);
seriesList.add(jsonObject);
JSONObject jsonObject1 = new JSONObject();
jsonObject1.put("xAxisData", xdata);
System.out.println(seriesList);
jsonObject1.put("seriesList", seriesList);
System.out.println((jsonObject1.get("seriesList")));
// 发送给前台
printWriter.write(jsonObject1.toString());
printWriter.flush();
printWriter.close();
rsst.close();
stmt.close();
con.close();
}
} catch (SQLException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
// request.setAttribute("data", data);
// request.getRequestDispatcher("echart222.jsp").forward(request, response);
}
}
这个用来实现查询
package com.data.java;
import java.io.IOException;
import java.sql.Connection;
import java.sql.Date;
import java.sql.ResultSet;
import java.sql.SQLException;
import java.sql.Statement;
import java.util.ArrayList;
import java.util.List;
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 com.alibaba.fastjson.JSON;
import com.alibaba.fastjson.JSONArray;
@WebServlet("/Query")
public class Query extends HttpServlet {
private static final long serialVersionUID = 1L;
public Query() {
super();
}
protected void doGet(HttpServletRequest request, HttpServletResponse response)
throws ServletException, IOException {
}
protected void doPost(HttpServletRequest request, HttpServletResponse response)
throws ServletException, IOException {
response.setHeader("Cache-Control", "no-cache");
request.setCharacterEncoding("utf-8");
response.setContentType("utf-8");
response.setCharacterEncoding("utf-8");
String valu = request.getParameter("valu");
String date = request.getParameter("date");
String type = request.getParameter("type");
System.out.println(valu);
try {
Connection con=BaseConnection.getConnection("VData");
Statement stmt=con.createStatement();
JSONArray json = new JSONArray();
List<ProvinceBean> arr = new ArrayList<>();
switch (type) {
case "province": {
String sql;
if (!date.equals("1")) {
sql = "select * from province where date='" + date + "' and name='" + valu + "'";
} else {
sql = "select * from province where name='" + valu + "'";
}
ResultSet rsst = stmt.executeQuery(sql);
while (rsst.next()) {
ProvinceBean pr = new ProvinceBean();
pr.setConfirm(rsst.getString("confirmm"));
pr.setCured(rsst.getString("cured"));
pr.setCurrent(rsst.getString("currentt"));
pr.setDate(rsst.getDate("date").toString());
pr.setDead(rsst.getString("dead"));
pr.setName(rsst.getString("name"));
pr.setState("亚洲");
pr.setSuspect(rsst.getString("suspect"));
arr.add(pr);
}
break;
}
case "city": {
String sql;
if (!date.equals("1")) {
sql = "select * from city where date='" + date + "' and name='" + valu + "'";
} else {
sql = "select * from city where name='" + valu + "'";
}
ResultSet rsst = stmt.executeQuery(sql);
while (rsst.next()) {
ProvinceBean pr = new ProvinceBean();
pr.setConfirm(rsst.getString("confirmm"));
pr.setCured(rsst.getString("cured"));
pr.setCurrent(rsst.getString("currentt"));
pr.setDate(rsst.getDate("date").toString());
pr.setDead(rsst.getString("dead"));
pr.setName(rsst.getString("name"));
pr.setState(rsst.getString("province"));
pr.setSuspect(rsst.getString("suspect"));
arr.add(pr);
}
rsst.close();
break;
}
case "contury": {
String sql;
if (!date.equals("1")) {
sql = "select * from contury where date='" + date + "' and provincename='" + valu + "'";
} else {
sql = "select * from contury where provincename='" + valu + "'";
}
ResultSet rsst = stmt.executeQuery(sql);
while (rsst.next()) {
ProvinceBean pr = new ProvinceBean();
pr.setConfirm(rsst.getString("confirmm"));
pr.setCured(rsst.getString("cured"));
pr.setCurrent(rsst.getString("currentt"));
pr.setDate(rsst.getDate("date").toString());
pr.setDead(rsst.getString("dead"));
pr.setName(rsst.getString("provincename"));
pr.setState(rsst.getString("continents"));
pr.setSuspect(rsst.getString("suspect"));
arr.add(pr);
}
rsst.close();
break;
}
case "date": {
if (valu.equals("out")) {
valu = "contury";
}
String sql = "select * from " + valu + " where date='" + date + "'";
ResultSet rsst = stmt.executeQuery(sql);
while (rsst.next()) {
ProvinceBean pr = new ProvinceBean();
pr.setConfirm(rsst.getString("confirmm"));
pr.setCured(rsst.getString("cured"));
pr.setCurrent(rsst.getString("currentt"));
pr.setDate(rsst.getDate("date").toString());
pr.setDead(rsst.getString("dead"));
pr.setName(rsst.getString("provincename"));
pr.setState(rsst.getString("continents"));
pr.setSuspect(rsst.getString("suspect"));
arr.add(pr);
}
rsst.close();
break;
}
}
stmt.close();
con.close();
// 通过print将json发送到前端
json = JSONArray.parseArray(JSON.toJSONString(arr));
System.out.println(json);
response.getWriter().print(json);
} catch (SQLException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}
}
，