使用Servlet+JSON实现股票信息实时更新-创新互联

使用servlet+json实现股票信息实时更新

一、服务端代码

1、Stock.java

package bean;
public class Stock {
    private String code;
    private String name;
    private int price;
    public String getCode() {
        return code;
    }
    public void setCode(String code) {
        this.code = code;
    }
    public String getName() {
        return name;
    }
    public void setName(String name) {
        this.name = name;
    }
    public int getPrice() {
        return price;
    }
    public void setPrice(int price) {
        this.price = price;
    }
}

2、ActionServlet.java

package web;
import java.io.IOException;
import java.io.PrintWriter;
import java.util.ArrayList;
import java.util.List;
import java.util.Random;
import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import bean.Stock;
import net.sf.json.JSONArray;

public class ActionServlet extends HttpServlet{
    public void service(HttpServletRequest request,HttpServletResponse response) throws ServletException,IOException{
        System.out.println("service()");
        //获得请求路径
        String uri=request.getRequestURI();
        System.out.println(uri);
        //分析请求路径
        String action=uri.substring(uri.lastIndexOf("/"),uri.lastIndexOf("."));
        System.out.println(action);
        response.setContentType("text/html;charset=utf-8");
        PrintWriter out=response.getWriter();
        if("/quoto".equals(action)){
            //模拟生成几支股票信息
            List stocks=new ArrayList();
            Random r=new Random();
            for(int i=0;i<8;i++){
                Stock s=new Stock();
                s.setCode("600877"+r.nextInt(10));
                s.setName("中国嘉陵"+r.nextInt(100));
                s.setPrice(10+r.nextInt(1000));
                stocks.add(s);
            }   
            //fromObject方法的参数可以是属猪或者结合
            JSONArray jsonArr=JSONArray.fromObject(stocks);
            String jsonStr=jsonArr.toString();
            System.out.println(jsonStr);
            out.println(jsonStr);
        }
    }
}

3、web.xml



  ajax-day02
  
    index.html
    index.htm
    index.jsp
    default.html
    default.htm
    default.jsp
  
  
    action
    web.ActionServlet
  
  
    action
    *.do

4、pom.xml


  4.0.0
  cn.qiuuuu
  ajax-day02
  0.0.1-SNAPSHOT
  war
  
      
          net.sf.json-lib
          json-lib
          2.4
          jdk15

二、客户端代码

1.stock.jsp

<%@ page contentType="text/html; charset=utf-8" pageEncoding="utf-8"%>


    
        
        
        
        Insert title here
        
    
    
        
            股票行情
            
                
                    
                        
                            代码
                            名称
                            价格