有一个javabean : Stock.java
有一个Servlet: TestStockServlet.java
有一个 页面：TestStock.html
Js: jquerystock.js
Stock.java
/**
* Created by IntelliJ IDEA.
* User: wenbing lu
* Date:
* Time: 9:22:48
* To change this template use File | Settings | File Templates.
*/
public class Stock {
private String name;
private String id;
private double yestdayPrice;
private double todayPrice;
private double nowPrice;
public Stock(String name, String id, double yestdayPrice, double todayPrice) {
this.name = name;
this.id = id;
this.yestdayPrice = yestdayPrice;
this.todayPrice = todayPrice;
this.nowPrice = todayPrice;
}
public String getName() {
return name;
}
public void setName(String name) {
this.name = name;
}
public String getId() {
return id;
}
public void setId(String id) {
this.id = id;
}
public double getYestdayPrice() {
return yestdayPrice;
}
public void setYestdayPrice(double yestdayPrice) {
this.yestdayPrice = yestdayPrice;
}
public double getTodayPrice() {
return todayPrice;
}
public void setTodayPrice(double todayPrice) {
this.todayPrice = todayPrice;
}
public double getNowPrice() {
return nowPrice;
}
public void setNowPrice(double nowPrice) {
this.nowPrice = nowPrice;
}
public String toString(){
return this.name + ": " + this.nowPrice;
}
}
TestStockServlet.java
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import javax.servlet.ServletException;
import java.io.IOException;
import java.io.PrintWriter;
import java.util.HashMap;
/**
* Created by IntelliJ IDEA.
* User: wenbing lu
* Date:
* Time: 9:32:34
* To change this template use File | Settings | File Templates.
*/
public class TestStockServlet extends HttpServlet {
private HashMap<String,Stock> Stocks;
protected void doPost(HttpServletRequest httpServletRequest, HttpServletResponse httpServletResponse) throws ServletException, IOException {
doGet(httpServletRequest, httpServletResponse);
}
@Override
protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
//设置随机数
double sz = Math.random() * 20;
double pf = Math.random() * 0.5;
//根据随机数的奇偶来判断上涨还是下跌
boolean flagsz = ((int)(Math.random() * 10)) % 2 == 0;
boolean flagpf = ((int)(Math.random() * 10)) % 2 == 0;
Stock szzs = Stocks.get("00001");
Stock pufa = Stocks.get("00002");
double temp;
//对股票当前指数进行加减
if(flagsz) {
temp = szzs.getNowPrice() + sz;
}else{
temp = szzs.getNowPrice() - sz;
}
//取小数点后两位
temp = ((int)(temp * 100) /100.0);
szzs.setNowPrice(temp);
if(flagpf) {
temp = pufa.getNowPrice() + pf;
}else{
temp = pufa.getNowPrice() - pf;
}
temp = ((int)(temp * 100) /100.0);
pufa.setNowPrice(temp);
response.setContentType("text/html;charset=gbk");
PrintWriter out = response.getWriter();
//out.println(szzs + "<br/>" + pufa);
//采用json的数据格式返回股票信息
StringBuilder builder = new StringBuilder();
//数组的方式回传两个股票对象
/* builder.append("[{ name:\" ").append(szzs.getName()).append(" \",")
.append("id: \"").append(szzs.getId()).append(" \",")
.append("yes: ").append(szzs.getYestdayPrice()).append(" ,")
.append("tod: ").append(szzs.getTodayPrice()).append(" ,")
.append("now: ").append(szzs.getNowPrice()).append(" },")
.append("{ name: \"").append(pufa.getName()).append(" \",")
.append("id: \"").append(pufa.getId()).append(" \",")
.append("yes: ").append(pufa.getYestdayPrice()).append(" ,")
.append("tod: ").append(pufa.getTodayPrice()).append(" ,")
.append("now: ").append(pufa.getNowPrice()).append(" }]");
out.println(builder);*/
/* [{
name:"szzs.getName()",
id: "szzs.getId()",
yes: szzs.getYestdayPrice(),
tod: szzs.getTodayPrice(),
now: szzs.getNowPrice()
},
{
name:"pufa.getName()",
id: "pufa.getId()",
yes: pufa.getYestdayPrice(),
tod: pufa.getTodayPrice(),
now: pufa.getNowPrice()
}]
*/ //对象的方式回传两个股票对象
/*{
szzs.getId():
{
name:"szzs.getName()",
yes: szzs.getYestdayPrice(),
tod: szzs.getTodayPrice(),
now: szzs.getNowPrice()
},
pufa.getId():
{
name:"pufa.getName()",
yes: pufa.getYestdayPrice(),
tod: pufa.getTodayPrice(),
now: pufa.getNowPrice()
}
/* }*/
//,如果采用对象的方式返回对象，要在对象上加括号
builder.append("({ \"").append(szzs.getId()).append("\" : {")
.append("name: \"").append(szzs.getName()).append(" \",")
.append("yes: ").append(szzs.getYestdayPrice()).append(" ,")
.append("tod: ").append(szzs.getTodayPrice()).append(" ,")
.append("now: ").append(szzs.getNowPrice()).append(" },\"")
.append(pufa.getId()).append("\" : {")
.append("name: \"").append(pufa.getName()).append(" \",")
.append("yes: ").append(pufa.getYestdayPrice()).append(" ,")
.append("tod: ").append(pufa.getTodayPrice()).append(" ,")
.append("now: ").append(pufa.getNowPrice()).append(" }})");
out.print(builder);
}
@Override
public void init() throws ServletException {
Stocks = new HashMap<String,Stock>();
Stock szzs = new Stock("上证指数","00001",3000.0,2999.0);
Stock pufa = new Stock("浦发银行","00002",25.0,24.0);
Stocks.put(szzs.getId(),szzs);
Stocks.put(pufa.getId(),pufa);
System.out.println(Stocks);
}
}
TestStock.html
<html>
<head>
<title></title>
<script type="text/javascript" src="jslib/jquery.js"></script>
<script type="text/javascript" src="jslib/jquerystock.js"></script>
</head>
<body>
<div id="00001"><a href="#">上证指数：</a><span></span></div>
<div id="00002"><a href="#">浦发银行：</a><span></span></div>
</body>
</html>
jquerystock.js
$(document).ready(function(){
getInfo();
//每隔一秒和服务器进行交互
setInterval(getInfo,1000);
});
function getInfo(){
//向服务器端发起请求，获取数据
$.get("TestStockServlet",null,function(data){
//接收数据， 解析数据
var obj = eval(data);
//获取两个对象
var szzs = obj["00001"];
var pufa = obj["00002"];
//找到页面对应的节点，填充股票价格
var span1 = $("#00001").children("span");
span1.html(szzs.now);
if(szzs.now > szzs.yes){
span1.css("color","red");
}else{
span1.css("color","green");
}
var span2 = $("#00002").children("span");
span2.html(pufa.now);
if(pufa.now > pufa.yes){
span2.css("color","red");
}else{
span2.css("color","green");
}
})
}
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