抓出问天网的城市天气

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package com.zdao.weather.util;

import java.io.BufferedReader;
import java.io.InputStreamReader;

import java.net.URL;
import java.util.regex.Matcher;
import java.util.regex.Pattern; import com.zdao.weather.bean.Weather;

public class OpenUrl {
 public static void main(String[] args){
 OpenUrl openUrl = new OpenUrl();
 Weather w = openUrl.getWeatherByUrl("http://weather.tq121.com.cn/detail.php?city=武汉");
 System.out.println(w.getDate1());
 System.out.println(w.getTemperature1());
 System.out.println(w.getWeather1());
 System.out.println(w.getWind1());

 System.out.println(w.getDate2());
 System.out.println(w.getTemperature2());
 System.out.println(w.getWeather2());
 System.out.println(w.getWind2());

 System.out.println(w.getDate3());
 System.out.println(w.getTemperature3());
 System.out.println(w.getWeather3());
 System.out.println(w.getWind3());

 System.out.println(w.getDate4());
 System.out.println(w.getTemperature4());
 System.out.println(w.getWeather4());
 System.out.println(w.getWind4());

 System.out.println(w.getDate5());
 System.out.println(w.getTemperature5());
 System.out.println(w.getWeather5());
 System.out.println(w.getWind5());
 }

 /
 * 根据连接抓出5天天气
 */
 public Weather getWeatherByUrl(String url){
 Weather weather = new Weather();
 try {
 long l1 = System.currentTimeMillis();

 String content = getContent(url);
 weather = getDateTemperature(content , weather);
 weather = getWind3(content , weather);
 weather = getWeather3(content , weather);
 weather = getDate(content , weather);
 weather = getTemperature(content , weather);
 weather = getWind2(content , weather);
 weather = getWeather2(content , weather);
 long l2 = System.currentTimeMillis();
 System.out.println(l2 - l1);
 }catch (Exception e){
 System.out.println(e);
 }
 return weather;
 }

 /
 * 根据连接地址抓出页面内容
 * @param 根据一个连接地址
 * @return 页面内容
 */
 private String getContent(String strUrl){
 try{
 URL url = new URL(strUrl);
 BufferedReader br = new BufferedReader(new InputStreamReader(url.openStream()));
 String s = "";
 StringBuffer sb=new StringBuffer();
 while((s = br.readLine())!=null){
 sb.append(s+"/r/n");
 }
 br.close();
 return sb.toString();
 }catch(Exception e){
 return "error open url" + strUrl;
 }
 }

 /
 * 取当前3天内的温度和时间
 * 返回一个天气bean
 * 0和1 2个参数为第一天时间和温度后面相同
 * content 为页面内容
 * weather 为天气bean
 */
 private Weather getDateTemperature(String content , Weather weather) throws Exception{
 String[] s = analysis("<td width=/"215/" align=/"center/" valign=/"middle/">(.*?)</td>", content , 6);
 weather.setDate1(s[0].trim());
 weather.setTemperature1(s[1].trim());
 weather.setDate2(s[2].trim());
 weather.setTemperature2(s[3].trim());
 weather.setDate3(s[4].trim());
 weather.setTemperature3(s[5].trim());
 return weather;
 }

 /
 * 取前3天的风向
 * content 为页面内容
 * weather 为天气bean
 */
 private Weather getWind3(String content , Weather weather){
 String[] s = analysis("<td width=/"215/" align=/"center/" valign=/"middle/">(.*?)</td>", content , 3);
 weather.setWind1(s[0].trim());
 weather.setWind2(s[1].trim());
 weather.setWind3(s[2].trim());
 return weather;
 }

 /
 * 取前3天的天气情况
 * content 为页面内容
 * weather 为天气bean
 */
 private Weather getWeather3(String content , Weather weather){
 String[] s = analysis("align=/"center/" valign=/"top/"><img src=/"../images/a(.*?).gif/" width=/"70/" height=/"65/"></td>" , content , 6);
 s = ConversionWeather(s);
 weather.setWeather1(s[0]);
 weather.setWeather2(s[1]);
 weather.setWeather3(s[2]);
 return weather;
 }

 /
 * 取后2天的日期
 */
 private Weather getDate(String content , Weather weather){
 String[] s = analysis("<td width=/"121/">(.*?)</td>" , content , 2);
 weather.setDate4(s[0].trim());
 weather.setDate5(s[1].trim());
 return weather;
 }

 /
 * 取后天2天的温度
 */
 private Weather getTemperature(String content , Weather weather){
 String[] s = analysis("<td width=/"86/" class=/"cn/">(.*?)</td>" , content , 2);
 weather.setTemperature4(s[0].trim());
 weather.setTemperature5(s[1].trim());
 return weather;
 }

 /
 * 取后天2天的风向
 */
 private Weather getWind2(String content , Weather weather){
 String[] s = analysis("<td width=/"157/">(.*?)</td>" , content , 2);
 weather.setWind4(s[0].trim());
 weather.setWind5(s[1].trim());
 return weather;
 }

 /
 *
 */
 private Weather getWeather2(String content , Weather weather){
 String[] s = analysis("<img src=/"../images/b(.*?).gif/" width=/"50/" height=/"46/"></td>" , content , 4);
 s = ConversionWeather(s);
 weather.setWeather4(s[0]);
 weather.setWeather5(s[1]);
 return weather;
 }

 /
 * 根据页面内容和正则表达式来分析页面,得到分析结果
 * @param pattern 正则表达式
 * @param match 页面内容
 * @return content 结果
 */
 private String[] analysis(String pattern, String match , int i){
 Pattern sp = Pattern.compile(pattern);
 Matcher matcher = sp.matcher(match);
 String[] content = new String[i];
 for (int i1 = 0; matcher.find(); i1++){
 content[i1] = matcher.group(1);
 }
 return content;
 }

 /
 * 转换天气情况
 * @param s第1张图片
 * @return 天气情况
 */
 private String[] ConversionWeather(String s[]){
 String[] s1 = { "晴天", "多云", "阴", "阵雨", "雷阵雨", "雷阵雨并伴有冰雹", "雨加雪", "小雨", "中雨", "大雨", "暴雨", "大暴雨", "特大暴雨", "阵雪", "小雪", "中雪", "大雪", "暴雪", "雾", "冻雨", "沙尘暴", "小雨-中雨", "中雨-大雨", "大雨-暴雨", "暴雨-大暴雨", "大暴雨-特大暴雨", "小雪-中雪", "中雪-大雪", "大雪-暴雪", "浮尘", "扬沙", "强沙尘暴"};
 String[] s2 = new String[s.length/2];
 int i1 = 0;
 for (int i = 0; i < s.length; i += 2){
 if (s[i].trim().equals(s[i+1].trim())){
 s2[i1] = s1[Integer.parseInt(s[i])];
 }else {
 s2[i1] = s1[Integer.parseInt(s[i])] + "转" + s1[Integer.parseInt(s[i+1])];
 }
 i1++;
 }
 return s2;
 }
}

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抓出问天网的城市天气

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