一、任务：仿照约翰·霍普金斯大学制作全球疫情发布图（WEB版），可以实时访问。
二、步骤分析
1.使用python爬取数据
2.设计页面布局
3.实现相关功能
三、具体实现
首先爬取数据到数据库（python和数据库方面放到下一篇中）
jsp代码部分
<%@ page language="java" contentType="text/html; charset=UTF-8" pageEncoding="UTF-8"%> <%@page import="java.util.Date"%> <%@page import="java.text.SimpleDateFormat"%> <%@taglib uri="http://java.sun.com/jsp/jstl/core" prefix="c"%> <!DOCTYPE html> <html> <head> <meta charset="UTF-8"> <title>Insert title here</title> <script src="js/jquery-1.11.3.min.js"></script> <script type="text/javascript" src="chart/echarts.min.js"></script> <script type="text/javascript" src="https://www.echartsjs.com/examples/vendors/echarts/map/js/world.js?_v_=1584687926098"></script> </head> <style> #title { background-color: black; border: solid 1px; font-family: "楷体"; text-align: center; font-color: white; height: 80px; 1200px; float: left; } #time { background-color: black; border: solid 1px; font-family: "楷体"; text-align: center; font-color: #333; 250px; height: 80px; float: left; } #left { background-color: black; overflow-x: auto; overflow-y: auto; border: solid 1px; font-family: "楷体"; text-align: center; font-color: #333; 250px; height: 800px; float: left; } #right { background-color: black; border: solid 1px; font-family: "楷体"; text-align: center; font-color: #333; 350px; height: 450px; float: left; } #right1 { background-color: black; overflow-x: auto; overflow-y: auto; border: solid 1px; font-family: "楷体"; text-align: center; font-color: #333; 175px; height: 450px; float: left; } #right2 { background-color: black; overflow-x: auto; overflow-y: auto; border: solid 1px; font-family: "楷体"; text-align: center; font-color: #333; 170px; height: 450px; float: right; } #mid { background-color: black; border: solid 1px; font-family: "楷体"; text-align: center; font-color: #333; 850px; height: 800px; float: left; } #line { background-color: #5c5c5c; border: solid 1px; 350px; height: 350px; float: left; } </style> <body onload="onload()"> <% %> <!-- 为ECharts准备一个具备大小（宽高）的Dom --> <div id="title"> <h2 style="color: white">全球疫情可视化展示</h2> </div> <div id="time"> <h2 id="showtime" style="color: white">time</h2> </div> <div id="left"></div> <div id="mid"></div> <div id="right"> <div id="right1">死亡人数</div> <div id="right2">治愈人数</div> </div> <div id="line">柱状图</div> <script type="text/javascript"> function onload(){ setInterval("document.getElementById('showtime').innerHTML=new Date().toLocaleString();", 1000); $.post( "Getconfirmed", function(data){ var sum=0; for(var i=0;i<data.length;i++) sum+= parseInt(data[i].confirmedCount); var htmltext="<h style='color: white;'>全球确诊人数为："+"<span style='color: red;font-size:50px'>"+sum+"</span></h>"; htmltext+="<table>" for(var i=0;i<data.length;i++) htmltext+="<tr><td>"+"<span style='color: white;'>"+data[i].provinceName+"</span></td><td><span style='color: red;'>"+data[i].confirmedCount+"</span></td></tr>"; htmltext+="</table>"; $("#left").html(htmltext); }, "json" ); $.post( "GetDead", function(data){ var sum=0; for(var i=0;i<data.length;i++) sum+= parseInt(data[i].deadCount); var htmltext="<h style='color: white;'>全球死亡人数为："+"<span style='color: red;font-size:50px'>"+sum+"</span></h>"; htmltext+="<table>" for(var i=0;i<data.length;i++) htmltext+="<tr><td>"+"<span style='color: white;'>"+data[i].provinceName+"</span></td><td><span style='color: red;'>"+data[i].deadCount+"</span></td></tr>"; htmltext+="</table>"; $("#right1").html(htmltext); }, "json" ); $.post( "Getcured", function(data){ var sum=0; for(var i=0;i<data.length;i++) sum+= parseInt(data[i].curedCount); var htmltext="<h style='color: white;'>全球治愈人数为："+"<span style='color: green;font-size:50px'>"+sum+"</span></h>"; htmltext+="<table>" for(var i=0;i<data.length;i++) htmltext+="<tr><td>"+"<span style='color: white;'>"+data[i].provinceName+"</span></td><td><span style='color: green;'>"+data[i].curedCount+"</span></td></tr>"; htmltext+="</table>"; $("#right2").html(htmltext); }, "json" ); //处理随日期变化的全球确诊人数图 var myChart1 = echarts.init(document.getElementById('line')); myChart1.setOption({ title:{ text:'确诊人数变化' }, tooltip:{}, grid: { left: '4%', right: '4%', bottom: '3%', //是否显示刻度标签 containLabel: true }, legend:{ data:['确诊数'] }, xAxis:{ data:[], axisLabel:{ //横坐标全部显示 interval:0, //横坐标倾斜45度 rotate:-45, }, }, yAxis:{}, series:[{ name:'确诊数', type:'line', data:[] }] }) var cname=[]; var value=[]; //处理这段时间疫情总数变化趋势 $.ajax({ url:"Dataconfirmed", type:"POST", dataType:"JSON", async:true, success:function(data){ for(var i=0;i<data.length;i++) { cname[i]=data[i].provinceName; value[i]=parseInt(data[i].confirmedCount); } myChart1.setOption({ xAxis:{ //放横坐标的数组 data:cname, }, series:[{ name:'确诊数', //每个横坐标对应的数值 data:value }] }); } }); //处理世界疫情地图 $.ajax({ url:"Allworld", type:"POST", dataType:"JSON", async:true, success:function(data){//表示处理成功之后做什么,后面跟一个匿名函数。回调函数，表示处理页面处理完数据以后执行这个函数。data表示处理页面返回的值，用形参接收。 var mydata = new Array(0); for(var i=0;i<data.length;i++){ var d = { }; d["name"] = data[i].provinceName;//.substring(0, 2); d["value"] = data[i].confirmedCount; d["Yisi_num"] = data[i].suspectedCount; d["Cured_num"] = data[i].curedCount; d["Dead_num"] = data[i].deadCount; mydata.push(d); } //初始化echarts实例 var myChart = echarts.init(document.getElementById('mid')); // 指定图表的配置项和数据 var option = { tooltip : { trigger: 'item', formatter : function(params) { return params.name + '<br/>' + '确诊人数 : ' + params.value + '<br/>' + '死亡人数 : ' + params['data'].Dead_num + '<br/>' + '治愈人数 : ' + params['data'].Cured_num + '<br/>'+ '疑似患者人数 : ' + params['data'].Yisi_num; }//数据格式化 }, title: { text: '世界疫情图', left: 'center' }, legend: { orient: 'vertical', left: 'left', data: ['世界疫情图'] }, visualMap: { type: 'piecewise', pieces: [ { min: 70000, max: 50000000, label: '确诊70000人以上', color: 'red' }, { min: 10000, max: 69999, label: '确诊10000-69999人', color: 'blue' }, { min: 5000, max: 9999, label: '确诊5000-9999人', color: 'purple' }, { min: 1500, max: 4999, label: '确诊1500-4999人', color: 'yellow' }, { min: 500, max: 1499, label: '确诊500-1499人', color: 'gold' }, { min: 0, max: 499, label: '确诊1-499人', color: 'green' }, ], color: ['#E0022B', '#E09107', '#A3E00B'] }, toolbox: { show: true, orient: 'vertical', left: 'right', top: 'center', feature: { mark: { show: true }, dataView: { show: true, readOnly: false }, restore: { show: true }, saveAsImage: { show: true } } }, roamController: { show: true, left: 'right', mapTypeControl: { 'world': true } }, series: [ { name: '确诊数', type: 'map', mapType: 'world', nameMap : {"Canada": "加拿大", "Turkmenistan": "土库曼斯坦", "Saint Helena": "圣赫勒拿", "Lao PDR": "老挝", "Lithuania": "立陶宛", "Cambodia": "柬埔寨", "Ethiopia": "埃塞俄比亚", "Faeroe Is.": "法罗群岛", "Swaziland": "斯威士兰", "Palestine": "巴勒斯坦", "Belize": "伯利兹", "Argentina": "阿根廷", "Bolivia": "玻利维亚", "Cameroon": "喀麦隆", "Burkina Faso": "布基纳法索", "Aland": "奥兰群岛", "Bahrain": "巴林", "Saudi Arabia": "沙特阿拉伯", "Fr. Polynesia": "法属波利尼西亚", "Cape Verde": "佛得角", "W. Sahara": "西撒哈拉", "Slovenia": "斯洛文尼亚", "Guatemala": "危地马拉", "Guinea": "几内亚", "Dem. Rep. Congo": "刚果（金）", "Germany": "德国", "Spain": "西班牙", "Liberia": "利比里亚", "Netherlands": "荷兰", "Jamaica": "牙买加", "Solomon Is.": "所罗门群岛", "Oman": "阿曼", "Tanzania": "坦桑尼亚", "Costa Rica": "哥斯达黎加", "Isle of Man": "曼岛", "Gabon": "加蓬", "Niue": "纽埃", "Bahamas": "巴哈马", "New Zealand": "新西兰", "Yemen": "也门", "Jersey": "泽西岛", "Pakistan": "巴基斯坦", "Albania": "阿尔巴尼亚", "Samoa": "萨摩亚", "Czech Rep.": "捷克", "United Arab Emirates": "阿拉伯联合酋长国", "Guam": "关岛", "India": "印度", "Azerbaijan": "阿塞拜疆", "N. Mariana Is.": "北马里亚纳群岛", "Lesotho": "莱索托", "Kenya": "肯尼亚", "Belarus": "白俄罗斯", "Tajikistan": "塔吉克斯坦", "Turkey": "土耳其", "Afghanistan": "阿富汗", "Bangladesh": "孟加拉国", "Mauritania": "毛里塔尼亚", "Dem. Rep. Korea": "朝鲜", "Saint Lucia": "圣卢西亚", "Br. Indian Ocean Ter.": "英属印度洋领地", "Mongolia": "蒙古", "France": "法国", "Cura?ao": "库拉索岛", "S. Sudan": "南苏丹", "Rwanda": "卢旺达", "Slovakia": "斯洛伐克", "Somalia": "索马里", "Peru": "秘鲁", "Vanuatu": "瓦努阿图", "Norway": "挪威", "Malawi": "马拉维", "Benin": "贝宁", "St. Vin. and Gren.": "圣文森特和格林纳丁斯", "Korea": "韩国", "Singapore": "新加坡", "Montenegro": "黑山共和国", "Cayman Is.": "开曼群岛", "Togo": "多哥", "China": "中国", "Heard I. and McDonald Is.": "赫德岛和麦克唐纳群岛", "Armenia": "亚美尼亚", "Falkland Is.": "马尔维纳斯群岛（福克兰）", "Ukraine": "乌克兰", "Ghana": "加纳", "Tonga": "汤加", "Finland": "芬兰", "Libya": "利比亚", "Dominican Rep.": "多米尼加", "Indonesia": "印度尼西亚", "Mauritius": "毛里求斯", "Eq. Guinea": "赤道几内亚", "Sweden": "瑞典", "Vietnam": "越南", "Mali": "马里", "Russia": "俄罗斯", "Bulgaria": "保加利亚", "United States": "美国", "Romania": "罗马尼亚", "Angola": "安哥拉", "Chad": "乍得", "South Africa": "南非", "Fiji": "斐济", "Liechtenstein": "列支敦士登", "Malaysia": "马来西亚", "Austria": "奥地利", "Mozambique": "莫桑比克", "Uganda": "乌干达", "Japan": "日本", "Niger": "尼日尔", "Brazil": "巴西", "Kuwait": "科威特", "Panama": "巴拿马", "Guyana": "圭亚那", "Madagascar": "马达加斯加", "Luxembourg": "卢森堡", "American Samoa": "美属萨摩亚", "Andorra": "安道尔", "Ireland": "爱尔兰", "Italy": "意大利", "Nigeria": "尼日利亚", "Turks and Caicos Is.": "特克斯和凯科斯群岛", "Ecuador": "厄瓜多尔", "U.S. Virgin Is.": "美属维尔京群岛", "Brunei": "文莱", "Australia": "澳大利亚", "Iran": "伊朗", "Algeria": "阿尔及利亚", "El Salvador": "萨尔瓦多", "C?te d'Ivoire": "科特迪瓦", "Chile": "智利", "Puerto Rico": "波多黎各", "Belgium": "比利时", "Thailand": "泰国", "Haiti": "海地", "Iraq": "伊拉克", "S?o Tomé and Principe": "圣多美和普林西比", "Sierra Leone": "塞拉利昂", "Georgia": "格鲁吉亚", "Denmark": "丹麦", "Philippines": "菲律宾", "S. Geo. and S. Sandw. Is.": "南乔治亚岛和南桑威奇群岛", "Moldova": "摩尔多瓦", "Morocco": "摩洛哥", "Namibia": "纳米比亚", "Malta": "马耳他", "Guinea-Bissau": "几内亚比绍", "Kiribati": "基里巴斯", "Switzerland": "瑞士", "Grenada": "格林纳达", "Seychelles": "塞舌尔", "Portugal": "葡萄牙", "Estonia": "爱沙尼亚", "Uruguay": "乌拉圭", "Antigua and Barb.": "安提瓜和巴布达", "Lebanon": "黎巴嫩", "Uzbekistan": "乌兹别克斯坦", "Tunisia": "突尼斯", "Djibouti": "吉布提", "Greenland": "格陵兰", "Timor-Leste": "东帝汶", "Dominica": "多米尼克", "Colombia": "哥伦比亚", "Burundi": "布隆迪", "Bosnia and Herz.": "波斯尼亚和黑塞哥维那", "Cyprus": "塞浦路斯", "Barbados": "巴巴多斯", "Qatar": "卡塔尔", "Palau": "帕劳", "Bhutan": "不丹", "Sudan": "苏丹", "Nepal": "尼泊尔", "Micronesia": "密克罗尼西亚", "Bermuda": "百慕大", "Suriname": "苏里南", "Venezuela": "委内瑞拉", "Israel": "以色列", "St. Pierre and Miquelon": "圣皮埃尔和密克隆群岛", "Central African Rep.": "中非", "Iceland": "冰岛", "Zambia": "赞比亚", "Senegal": "塞内加尔", "Papua New Guinea": "巴布亚新几内亚", "Trinidad and Tobago": "特立尼达和多巴哥", "Zimbabwe": "津巴布韦", "Jordan": "约旦", "Gambia": "冈比亚", "Kazakhstan": "哈萨克斯坦", "Poland": "波兰", "Eritrea": "厄立特里亚", "Kyrgyzstan": "吉尔吉斯斯坦", "Montserrat": "蒙特塞拉特", "New Caledonia": "新喀里多尼亚", "Macedonia": "马其顿", "Paraguay": "巴拉圭", "Latvia": "拉脱维亚", "Hungary": "匈牙利", "Syria": "叙利亚", "Honduras": "洪都拉斯", "Myanmar": "缅甸", "Mexico": "墨西哥", "Egypt": "埃及", "Nicaragua": "尼加拉瓜", "Cuba": "古巴", "Serbia": "塞尔维亚", "Comoros": "科摩罗", "United Kingdom": "英国", "Fr. S. Antarctic Lands": "南极洲", "Congo": "刚果（布）", "Greece": "希腊", "Sri Lanka": "斯里兰卡", "Croatia": "克罗地亚", "Botswana": "博茨瓦纳", "Siachen Glacier": "锡亚琴冰川地区" }, roam: false, label: { show: false, color: 'blue' }, data: mydata } ] }; //使用指定的配置项和数据显示图表 myChart.setOption(option); }, error:function(){//处理页面出错以后执行的函数。 } }); } </script> </body> </html>
dao层
package dao; import java.sql.Connection; import java.sql.ResultSet; import java.sql.SQLException; import java.sql.Statement; import java.util.ArrayList; import entity.World; import util.DBUtil; public class Dao { public ArrayList<World> getconfirmed(String time) { String sql="select * from world_map where now_time like '"+time+"%' "; System.out.println(time); Connection con=null; Statement state=null; ResultSet rs=null; boolean flag=false; con=DBUtil.getConn(); World bean=null; ArrayList<World> list=new ArrayList<World>(); try { state=con.createStatement(); rs=state.executeQuery(sql); while(rs.next()) { bean=new World(); bean.setProvinceName(rs.getString("provinceName")); bean.setConfirmedCount(rs.getString("confirmedCount")); bean.setSuspectedCount(rs.getString("suspectedCount")); bean.setCuredCount(rs.getString("curedCount")); bean.setDeadCount(rs.getString("deadCount")); //System.out.println(bean.getName()+" "+bean.getConfirmed()); list.add(bean); } } catch (SQLException e) { // TODO 自动生成的 catch 块 e.printStackTrace(); } DBUtil.close(rs, state, con); return list; } public ArrayList<World> getdead(String time) { String sql="select * from world_map where now_time like '"+time+"%' ORDER BY deadCount desc "; System.out.println(time); Connection con=null; Statement state=null; ResultSet rs=null; boolean flag=false; con=DBUtil.getConn(); World bean=null; ArrayList<World> list=new ArrayList<World>(); try { state=con.createStatement(); rs=state.executeQuery(sql); while(rs.next()) { bean=new World(); bean.setProvinceName(rs.getString("provinceName")); bean.setConfirmedCount(rs.getString("confirmedCount")); bean.setSuspectedCount(rs.getString("suspectedCount")); bean.setCuredCount(rs.getString("curedCount")); bean.setDeadCount(rs.getString("deadCount")); //System.out.println(bean.getName()+" "+bean.getConfirmed()); list.add(bean); } } catch (SQLException e) { // TODO 自动生成的 catch 块 e.printStackTrace(); } DBUtil.close(rs, state, con); return list; } public ArrayList<World> getcured(String time) { String sql="select * from world_map where now_time like '"+time+"%' order by curedCount desc "; System.out.println(time); Connection con=null; Statement state=null; ResultSet rs=null; boolean flag=false; con=DBUtil.getConn(); World bean=null; ArrayList<World> list=new ArrayList<World>(); try { state=con.createStatement(); rs=state.executeQuery(sql); while(rs.next()) { bean=new World(); bean.setProvinceName(rs.getString("provinceName")); bean.setConfirmedCount(rs.getString("confirmedCount")); bean.setSuspectedCount(rs.getString("suspectedCount")); bean.setCuredCount(rs.getString("curedCount")); bean.setDeadCount(rs.getString("deadCount")); //System.out.println(bean.getCuredCount()); list.add(bean); } } catch (SQLException e) { // TODO 自动生成的 catch 块 e.printStackTrace(); } DBUtil.close(rs, state, con); return list; } public ArrayList<World> dataconfirmed() { String sql="select * from world_map "; Connection con=null; Statement state=null; ResultSet rs=null; boolean flag=false; con=DBUtil.getConn(); World bean=null; int sum=0; int ans=0; String data=null; ArrayList<World> list=new ArrayList<World>(); try { state=con.createStatement(); rs=state.executeQuery(sql); while(rs.next()) { sum++; bean=new World(); bean.setProvinceName(rs.getString("now_time")); if(sum==1) data=bean.getProvinceName(); bean.setConfirmedCount(rs.getString("confirmedCount")); if(data.equals(bean.getProvinceName())) ans+=Integer.parseInt(bean.getConfirmedCount()); else { String timeString=data.substring(0,10); World bean2=new World(); bean2.setProvinceName(timeString); bean2.setConfirmedCount(String.valueOf(ans)); sum=1; ans=0; ans+=Integer.parseInt(bean.getConfirmedCount()); data=bean.getProvinceName(); list.add(bean2); } } bean.setProvinceName(data.substring(0,10)); bean.setConfirmedCount(String.valueOf(ans)); list.add(bean); } catch (SQLException e) { // TODO 自动生成的 catch 块 e.printStackTrace(); } DBUtil.close(rs, state, con); return list; } public ArrayList<World> allworld(String time) { String sql="select * from world_map where now_time like '"+time+"%' "; System.out.println(time); Connection con=null; Statement state=null; ResultSet rs=null; boolean flag=false; con=DBUtil.getConn(); World bean=null; ArrayList<World> list=new ArrayList<World>(); try { state=con.createStatement(); rs=state.executeQuery(sql); while(rs.next()) { bean=new World(); bean.setProvinceName(rs.getString("provinceName")); bean.setConfirmedCount(rs.getString("confirmedCount")); bean.setSuspectedCount(rs.getString("suspectedCount")); bean.setCuredCount(rs.getString("curedCount")); bean.setDeadCount(rs.getString("deadCount")); //System.out.println(bean.getName()+" "+bean.getConfirmed()); list.add(bean); } } catch (SQLException e) { // TODO 自动生成的 catch 块 e.printStackTrace(); } DBUtil.close(rs, state, con); return list; } }
显示治愈人数、死亡人数、确诊人数功能
package servlet; import java.io.IOException; import java.util.Date; import java.text.SimpleDateFormat; import java.util.ArrayList; 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.google.gson.Gson; import dao.Dao; import entity.World; /** * Servlet implementation class Getconfirmed */ @WebServlet("/Getconfirmed") public class Getconfirmed extends HttpServlet { private static final long serialVersionUID = 1L; /** * @see HttpServlet#HttpServlet() */ public Getconfirmed() { super(); // TODO Auto-generated constructor stub } /** * @see HttpServlet#doGet(HttpServletRequest request, HttpServletResponse response) */ protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException { // TODO Auto-generated method stub Dao dao=new Dao(); request.setCharacterEncoding("utf-8"); Date now = new Date(); SimpleDateFormat dateFormat = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");//设置日期格式 String Time = dateFormat.format(now);//格式化然后放入字符串中 String data=Time.substring(0,10); ArrayList<World> list=dao.getconfirmed(data); Gson gson = new Gson(); response.setContentType("text/html;charset=utf-8"); String json = gson.toJson(list); response.getWriter().write(json); System.out.println(json); } /** * @see HttpServlet#doPost(HttpServletRequest request, HttpServletResponse response) */ protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException { // TODO Auto-generated method stub doGet(request, response); } }
package servlet; import java.io.IOException; import java.text.SimpleDateFormat; import java.util.ArrayList; import java.util.Date; 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.google.gson.Gson; import dao.Dao; import entity.World; /** * Servlet implementation class Getcured */ @WebServlet("/Getcured") public class Getcured extends HttpServlet { private static final long serialVersionUID = 1L; /** * @see HttpServlet#HttpServlet() */ public Getcured() { super(); // TODO Auto-generated constructor stub } /** * @see HttpServlet#doGet(HttpServletRequest request, HttpServletResponse response) */ protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException { Dao dao =new Dao(); request.setCharacterEncoding("utf-8"); Date now = new Date(); SimpleDateFormat dateFormat = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");//设置日期格式 String Time = dateFormat.format(now);//格式化然后放入字符串中 String data=Time.substring(0,10); ArrayList<World> list=dao.getcured(data); Gson gson = new Gson(); response.setContentType("text/html;charset=utf-8"); String json = gson.toJson(list); response.getWriter().write(json); System.out.println(json); } /** * @see HttpServlet#doPost(HttpServletRequest request, HttpServletResponse response) */ protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException { // TODO Auto-generated method stub doGet(request, response); } }
package servlet; import java.io.IOException; import java.text.SimpleDateFormat; import java.util.ArrayList; import java.util.Date; 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.google.gson.Gson; import dao.Dao; import entity.World; /** * Servlet implementation class GetDead */ @WebServlet("/GetDead") public class GetDead extends HttpServlet { private static final long serialVersionUID = 1L; /** * @see HttpServlet#HttpServlet() */ public GetDead() { super(); // TODO Auto-generated constructor stub } /** * @see HttpServlet#doGet(HttpServletRequest request, HttpServletResponse response) */ protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException { Dao dao=new Dao(); request.setCharacterEncoding("utf-8"); Date now = new Date(); SimpleDateFormat dateFormat = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");//设置日期格式 String Time = dateFormat.format(now);//格式化然后放入字符串中 String data=Time.substring(0,10); ArrayList<World> list=dao.getdead(data); Gson gson = new Gson(); response.setContentType("text/html;charset=utf-8"); String json = gson.toJson(list); response.getWriter().write(json); System.out.println(json); } /** * @see HttpServlet#doPost(HttpServletRequest request, HttpServletResponse response) */ protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException { // TODO Auto-generated method stub doGet(request, response); } }
实现日期控制
package servlet; import java.io.IOException; import java.util.ArrayList; 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.google.gson.Gson; import dao.Dao; import entity.World; /** * Servlet implementation class Dataconfirmed */ @WebServlet("/Dataconfirmed") public class Dataconfirmed extends HttpServlet { private static final long serialVersionUID = 1L; /** * @see HttpServlet#HttpServlet() */ public Dataconfirmed() { super(); // TODO Auto-generated constructor stub } /** * @see HttpServlet#doGet(HttpServletRequest request, HttpServletResponse response) */ protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException { Dao dao =new Dao(); request.setCharacterEncoding("utf-8"); ArrayList<World> list=dao.dataconfirmed(); Gson gson = new Gson(); response.setContentType("text/html;charset=utf-8"); String json = gson.toJson(list); response.getWriter().write(json); System.out.println("日期变化曲线！"); System.out.println(json); } /** * @see HttpServlet#doPost(HttpServletRequest request, HttpServletResponse response) */ protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException { // TODO Auto-generated method stub doGet(request, response); } }
具体运行界面：
