本文主要是介绍java写的未来6天的天气预报，希望对大家解决编程问题提供一定的参考价值，需要的开发者们随着小编来一起学习吧！
最近写的一个java程序，
需求：获取未来6天的天气预报，条用中央气象台API来实现的
有兴趣的同学可以，参考一下：代码如下
package com.xuan.service;import java.io.BufferedReader;
import java.io.FileNotFoundException;
import java.io.IOException;
import java.io.InputStreamReader;
import java.net.SocketTimeoutException;
import java.net.URL;
import java.net.URLConnection;
import java.text.SimpleDateFormat;
import java.util.ArrayList;
import java.util.Calendar;
import java.util.Date;
import java.util.HashMap;
import java.util.List;
import java.util.Map;import net.sf.json.JSONObject;public class Weather {private String Cityid;private URLConnection connectionData;private StringBuilder sb;private BufferedReader br;// 读取data数据流 private JSONObject jsonData; private JSONObject info; public Weather(String cityid) throws IOException{///解析本机IP地址this.Cityid=cityid;///连接中央气象台的APiURL url=new URL("http://m.weather.com.cn/data/" + Cityid + ".html");connectionData = url.openConnection(); connectionData.setConnectTimeout(1000); try { br = new BufferedReader(new InputStreamReader(connectionData.getInputStream(), "UTF-8")); sb = new StringBuilder(); String line = null; while ((line = br.readLine()) != null){sb.append(line); }} catch (SocketTimeoutException e) { System.out.println("连接超时"); } catch (FileNotFoundException e) { System.out.println("加载文件出错"); } String datas = sb.toString(); jsonData = JSONObject.fromObject(datas); // System.out.println(jsonData.toString()); info = jsonData.getJSONObject("weatherinfo"); //得到1到6天的天气情况List<Map<String,Object>> list =new ArrayList<Map<String,Object>>();for(int i=1;i<=6;i++){//得到未来6天的日期Calendar cal = Calendar.getInstance();cal.add(Calendar.DAY_OF_YEAR, i-1);Date date = cal.getTime();SimpleDateFormat sf = new SimpleDateFormat("yyyy年MM月dd日");Map<String,Object> map = new HashMap<String, Object>();map.put("city", info.getString("city").toString());//城市map.put("date_y", sf.format(date));//日期map.put("week", getWeek(cal.get(Calendar.DAY_OF_WEEK)));//星期map.put("fchh", info.getString("fchh").toString());//发布时间map.put("weather", info.getString("weather"+i).toString());//天气map.put("temp", info.getString("temp"+i).toString());//温度map.put("wind", info.getString("wind"+i).toString());//风况map.put("fl", info.getString("fl"+i).toString());//风速map.put("index", info.getString("index").toString());// 今天的穿衣指数 map.put("index_uv", info.getString("index_uv").toString());// 紫外指数 map.put("index_tr", info.getString("index_tr").toString());// 旅游指数 map.put("index_co", info.getString("index_co").toString());// 舒适指数 map.put("index_cl", info.getString("index_cl").toString());// 晨练指数 map.put("index_xc", info.getString("index_xc").toString());//洗车指数 map.put("index_d", info.getString("index_d").toString());//天气详细穿衣指数 list.add(map);}//控制台打印出天气for(int j=0;j<list.size();j++){Map<String,Object> wMap = list.get(j);System.out.println(wMap.get("city")+"\t"+wMap.get("date_y")+"\t"+wMap.get("week")+"\t"+wMap.get("weather")+"\t"+wMap.get("temp")+"\t"+wMap.get("index_uv"));}}private String getWeek(int iw){String weekStr = "";switch (iw) {case 1:weekStr = "星期天";break;case 2:weekStr = "星期一";break;case 3:weekStr = "星期二";break;case 4:weekStr = "星期三";break;case 5:weekStr = "星期四";break;case 6:weekStr = "星期五";break;case 7:weekStr = "星期六";break;default:break;}return weekStr;}///public static void main(String[] args) { try { new Weather("101010100"); // 101010100(北京)就是你的城市代码new Weather("101280101"); // 101280101(广州)就是你的城市代码} catch (Exception e) { e.printStackTrace(); } } }/
运行效果：
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