512
技術社區[雲棲]
天氣預報進展
昨天下午和今天早上重新對程序進行了一下修改,增加了如下功能:
一、首次運行時會先暫停五秒,然後每24小時運行一次
二、每次運行程序的時候會先清空一次數據庫,然後再執行抓取、解析、插入的工作
三、增加了程序30%的注釋
四、部分類和主函數之間麵向對象的實現得到了改善
五、發布了JSP的WEB頁麵,WEB頁麵有兩個:Index和detail。Index主要顯示數據庫city_info中的數據項信息,detail主要通過頁麵傳參的形式通過city_info及weather_info兩張表的聯合查詢,顯示出Index頁麵鼠標點擊城市的對應天氣信息。每個城市都有自己的id值,這個id值就是對外發布出去的HTTP接口,頁麵運行結果如以下幾個頁麵的地址所示:
https://localhost:8080/WeatherWeb/ShowDetail.jsp?id=101050301
{"weatherinfo":{"city":"牡丹江","date":2011年12月1日","year":辛卯年","week":星期四","description":天氣寒冷,建議著厚羽絨服、毛皮大衣加厚毛衣等隆冬服裝。年老體弱者尤其要注意保暖防凍。","temp1":"-7℃~-18℃","winddricetion1":"西風3-4級轉微風","windpower1":"3-4級轉小於3級 ","temp2":"-6℃~-15℃","winddricetion2":"西北風3-4級轉微風","windpower2":"3-4級轉小於3級
","temp3":"-6℃~-15℃","winddricetion3":"西南風3-4級轉微風","windpower3":"3-4級轉小於3級 ","temp4":"-6℃~-16℃","winddricetion4":"西南風3-4級轉微風","windpower4":"3-4級轉小於3級 ","temp5":"-6℃~-17℃","winddricetion5":"西南風3-4級轉微風","windpower5":"3-4級轉小於3級"}}
https://localhost:8080/WeatherWeb/ShowDetail.jsp?id=101060301
{"weatherinfo":{"city":"延吉","date":2011年12月1日","year":辛卯年","week":星期四","description":天氣寒冷,建議著厚羽絨服、毛皮大衣加厚毛衣等隆冬服裝。年老體弱者尤其要注意保暖防凍。","temp1":"-6℃~-17℃","winddricetion1":"西風轉東風小於3級","windpower1":"小於3級 ","temp2":"-4℃~-12℃","winddricetion2":"東風轉西風小於3級","windpower2":"小於3級
","temp3":"-4℃~-12℃","winddricetion3":"西風3-4級轉小於3級","windpower3":"3-4級轉小於3級 ","temp4":"-2℃~-13℃","winddricetion4":"西風小於3級","windpower4":"小於3級 ","temp5":"-3℃~-11℃","winddricetion5":"西風小於3級","windpower5":"小於3級"}}
https://localhost:8080/WeatherWeb/ShowDetail.jsp?id=101081000
{"weatherinfo":{"city":"唿倫貝爾","date":2011年12月1日","year":辛卯年","week":星期四","description":天氣寒冷,建議著厚羽絨服、毛皮大衣加厚毛衣等隆冬服裝。年老體弱者尤其要注意保暖防凍。","temp1":"-17℃~-26℃","winddricetion1":"微風","windpower1":"小於3級 ","temp2":"-11℃~-20℃","winddricetion2":"微風","windpower2":"小於3級
","temp3":"-12℃~-25℃","winddricetion3":"微風","windpower3":"小於3級 ","temp4":"-7℃~-29℃","winddricetion4":"微風","windpower4":"小於3級 ","temp5":"-9℃~-28℃","winddricetion5":"微風","windpower5":"小於3級"}}
六、將數據庫中解析出的字段通過拚字符串的方法重新轉化為JSON格式對外提供接口
需要改善增加的地方有:
一、程序麵向對象的體現不是很好
二、增加曆史表,每天自動運行程序時不是使用truncate清空表,而是將曆史記錄轉移至曆史表中
三、定時器,改造為每天,比如零點或者六點自動運行
四、放棄JSP,改用SERVLET的方法重新製作WEB端,需要學習WEB開發!
最近的事情也要做個規劃:
一、今天周四了,打算利用這周四、五、六、日的業餘時間學習製作一下馬士兵的BBS項目,然後自己動手改造做一個自己的項目。旨在熟悉WEB開發,前台後台管理員、登陸等等。畢竟以前從未做過WEB開發。
二、 下周利用時間學習製作下馬士兵的網上商城項目,然後自己動手也跟著學習製作一個自己的網上商城。
三、SERVLET還是前提啊。。。。需要抓緊學習。
增加的部分代碼如下:
主函數定時器實現:
public class TestWeather { /** * @param args */ public static void main(String[] args) { Timer tt=new Timer();//設置定時器 TimerTaskMine tk=new TimerTaskMine(); tt.schedule(tk, 1000*5, 1000*3600*24);//程序不關,每次執行先暫停五秒,以後每隔24小時運行一次 } } class TimerTaskMine extends TimerTask{ private static GetInfo get;//調用靜態方法從GetInfo類中獲取網頁信息 @Override public void run() { //private static ReadJson read;//調用靜態方法從ReadJson類中讀取文件信息 //private static InputStream inputStream; /* 主函數 */ //int i = 0; //Properties可保存在流中或從流中加載。屬性列表中每個鍵及其對應值都是一個字符串 Properties prop = new Properties(); InputStream inputStream = new TestWeather().getClass().getResourceAsStream("/weather_code.properties"); try { prop.load(inputStream);//從輸入流中讀取屬性列表 // System.out.println(prop.getProperty("101020100")); Enumeration<?> en = prop.propertyNames();//返回屬性列表中所有鍵的枚舉 String obj = ""; // get=new GetInfo(); // get.getInfo("101020100"); TruncateMysql.truncateMysql();//清空數據庫數據表內容 System.out.println("truncate over!"); while (en.hasMoreElements()) {//測試此枚舉是否包含更多的元素。 obj = (String) en.nextElement();//obj即為weather_code.properties中獲得的城市代碼 // System.out.println(obj); // get.getInfo(Integer.parseInt(obj)); get = new GetInfo(); // System.out.println(obj.); get.getInfo(obj); // 抓取網頁 // get=new GetInfo(); // get.getInfo(obj); // get=new GetInfo(); // get.getInfo(Integer.parseInt(obj)); } } catch (IOException e) { e.printStackTrace(); } finally { // 關閉IO資源 try { if (null != inputStream) { inputStream.close(); inputStream = null; } } catch (IOException e) { e.printStackTrace(); } } System.out.println("helloworld"); } }
清空表的實現:
public class TruncateMysql { public static void truncateMysql() { //將連接和預編譯的 SQL語句的對象初始化為0 Statement stmt=null; Connection conn=null; try { Class.forName("com.mysql.jdbc.Driver");//Load the Driver conn=DriverManager.getConnection("jdbc:mysql://10.1.101.223:3306/weather", "appuser", "opzoon123!");//Connect to the DataBase stmt=conn.createStatement(); String sql="truncate table weather_info"; stmt.executeUpdate(sql);//Execute the SQL }catch (ClassNotFoundException e) { e.printStackTrace(); }catch (SQLException e) { e.printStackTrace(); }finally {//close try {//按照順序先關閉stmt再關閉conn if(stmt!=null) { stmt.close(); stmt=null; } }catch (SQLException e) { e.printStackTrace(); } try { if(conn!=null) { conn.close(); conn=null; } }catch (SQLException e) { e.printStackTrace(); } } }
JSP主頁麵實現:
<%@ page language="java" contentType="text/html; charset=gbk" pageEncoding="gbk"%> <%@ page import="java.sql.*" %> <% Class.forName("com.mysql.jdbc.Driver"); Connection conn=DriverManager.getConnection("jdbc:mysql://10.1.101.223:3306/weather", "appuser", "opzoon123!"); Statement stmt=conn.createStatement(); ResultSet rs=stmt.executeQuery("select * from city_info"); %> <!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "https://www.w3.org/TR/html4/loose.dtd"> <html> <head> <meta http-equiv="Content-Type" content="text/html; charset=gbk"> <title>天氣預報發布頁主頁</title> </head> <body> <table border="1"> <% while(rs.next()) { %> <tr> <td><%= rs.getInt("id") %></td> <td><%= rs.getInt("city_id") %></td> <td><a href="ShowDetail.jsp?id=<%= rs.getInt("city_id") %>"><%= rs.getString("city_name") %></a></td> <%-- <td><%= rs.getString("weather_date") %></td> <td><%= rs.getString("weather_year") %></td> <td><%= rs.getString("weather_week") %></td> <td><%= rs.getString("weather_temp") %></td> <td><%= rs.getString("weather_winddriection") %></td> <td><%= rs.getString("weather_windpower") %></td> <td><%= rs.getString("weather_desprition") %></td> --%> </tr> <% } %> </table> </body> <% rs.close(); stmt.close(); conn.close(); %> </html>
JSP detail頁麵的實現
將內容轉化為JSON格式
<%@ page language="java" contentType="text/html; charset=gbk" pageEncoding="gbk"%> <%@ page import="java.sql.*" %> <% String city_id=request.getParameter("id"); Class.forName("com.mysql.jdbc.Driver"); Connection conn=DriverManager.getConnection("jdbc:mysql://10.1.101.223:3306/weather", "appuser", "opzoon123!"); Statement stmt=conn.createStatement(); ResultSet rs=stmt.executeQuery("select city_name,weather_date,weather_year,weather_week,weather_temp,weather_winddirection,weather_windpower,weather_description from city_info,weather_info where city_info.city_id=weather_info.city_id and city_info.city_id='"+city_id+"'"); %> <% boolean flag = true; int i=0; int j=0; int k=0; int m=0; while(rs.next()) { %> <%if(flag){ %>{"weatherinfo":{"city":"<%= rs.getString("city_name") %>","date":<%= rs.getString("weather_date") %>","year":<%= rs.getString("weather_year") %>","week":<%= rs.getString("weather_week") %>","description":<%= rs.getString("weather_description") %><% flag = false; } %>","temp<%++i;out.print(i);%>":"<%= rs.getString("weather_temp")%>","winddricetion<%++j;out.print(j);%>":"<%= rs.getString("weather_winddirection")%>","windpower<%++k;out.print(k);%>":"<%= rs.getString("weather_windpower")%><%}%>"}} <% rs.close(); stmt.close(); conn.close(); %>
最後更新:2017-04-02 06:52:11