java 获取新浪天气样例

前言：

       提供天气api的厂商有很多，比如，腾讯、雅虎、中国天气网，在综合比较各个功能后，决定使用新浪的天气接口，主要是考虑到，新浪的接口可以直接通过城市名字查询天气，而像雅虎、中国天气网需要使用自己的内部城市编码，维护起来比较麻烦，另外有的厂商会收费。

实现思路：

通过新浪ip的api，获取ip归属地城市；

通过新浪天气的api，传入城市名字，获取城市的天气；

通过ip获取城市的url地址：

http://int.dpool.sina.com.cn/iplookup/iplookup.php?format=json&ip="+ip

通过城市获取天气的url地址：

"http://php.weather.sina.com.cn/xml.php?city=" + encodedCityName+ "&password=DJOYnieT8234jlsK&day=0";

注意，city需要经过gbk编码，比如String encodedCityName = URLEncoder.encode(cityName, "GBK");

password是固定的，新浪规定的，不需要修改；

基本代码：

通过ip获取城市

private static String getCityNameByIp(String ip) {
		try{
			String ipUrl = "http://int.dpool.sina.com.cn/iplookup/iplookup.php?format=json&ip="+ip;
			HttpClient  client = new DefaultHttpClient();
			HttpGet get = new HttpGet(ipUrl);
			HttpResponse  response = client.execute(get);
			HttpEntity responseEntity = response.getEntity();
			//服务器端使用utf-8编码,所以这里用utf-8解析服务器端传来的字节流
			String resultJsonStr = EntityUtils.toString(responseEntity,"utf-8");
			IpCityInfo result = new Gson().fromJson(resultJsonStr, IpCityInfo.class);
			String cityName =  result.getCity();
			if(cityName == null){
				return "";
			}
		}catch(Exception e){
			e.printStackTrace();
			logger.error("根据ip获取城市名字失败",e);
		}
		return "";
	}

这里使用了apache httpclient包，google的gson包，用于将json串转为java对象

通过城市名字获取天气

private static WeatherInfo getWeatherInfoByCityName(String cityName) {
		
		String encodedCityName = null;
		try {
			encodedCityName = URLEncoder.encode(cityName, "GBK");
		} catch (UnsupportedEncodingException e1) {
			e1.printStackTrace();
		}
		String url = "http://php.weather.sina.com.cn/xml.php?city=" + encodedCityName
				+ "&password=DJOYnieT8234jlsK&day=0";
		try{
			HttpClient  client = new DefaultHttpClient();
			HttpGet get = new HttpGet(url);
			HttpResponse  response = client.execute(get);
			HttpEntity responseEntity = response.getEntity();
			InputStream content = responseEntity.getContent();
			JAXBContext context = JAXBContext.newInstance(Profile.class);
			Unmarshaller  unmarshaller = context.createUnmarshaller();
			Profile result = (Profile) unmarshaller.unmarshal(content);
			return result.getWeather();
		}catch(Exception e){
			e.printStackTrace();
			logger.error("根据ip获取城市名字失败",e);
		}
		return null;
	}
	

这里用到了：jdk1.6自带的jaxb（java api for xml binding）用于将xml转java对象

辅助的实体类：

public class IpCityInfo implements Serializable{

	
	/**    
	 * serialVersionUID:TODO（用一句话描述这个变量表示什么）    
	 *    
	 * @since Ver 1.1    
	 */    
	
	private static final long serialVersionUID = 1L;
	
	
	String ret;
	String start;
	String end;
	String country;
	String province;
	String city;
	String district;
	String isp;
	String type;
	String desc;
	
	
	
	public String getRet() {
		return ret;
	}
	public void setRet(String ret) {
		this.ret = ret;
	}
	public String getStart() {
		return start;
	}
	public void setStart(String start) {
		this.start = start;
	}
	public String getEnd() {
		return end;
	}
	public void setEnd(String end) {
		this.end = end;
	}
	public String getCountry() {
		return country;
	}
	public void setCountry(String country) {
		this.country = country;
	}
	public String getProvince() {
		return province;
	}
	public void setProvince(String province) {
		this.province = province;
	}
	public String getCity() {
		return city;
	}
	public void setCity(String city) {
		this.city = city;
	}
	public String getDistrict() {
		return district;
	}
	public void setDistrict(String district) {
		this.district = district;
	}
	public String getIsp() {
		return isp;
	}
	public void setIsp(String isp) {
		this.isp = isp;
	}
	public String getType() {
		return type;
	}
	public void setType(String type) {
		this.type = type;
	}
	public String getDesc() {
		return desc;
	}
	public void setDesc(String desc) {
		this.desc = desc;
	}
	@Override
	public String toString() {
		return "IpCityInfo [ret=" + ret + ", start=" + start + ", end=" + end
				+ ", country=" + country + ", province=" + province + ", city="
				+ city + ", district=" + district + ", isp=" + isp + ", type="
				+ type + ", desc=" + desc + "]";
	}
	
	
	
	
	
}

@XmlRootElement(name="Profiles") 
public class Profile {

	private WeatherInfo weather;

	public WeatherInfo getWeather() {
		return weather;
	}

	@XmlElement(name="Weather") 
	public void setWeather(WeatherInfo weather) {
		this.weather = weather;
	}
	
	
}

public class WeatherInfo implements Serializable{

	/**    
	 * serialVersionUID:TODO（用一句话描述这个变量表示什么）    
	 *    
	 * @since Ver 1.1    
	 */    
	/*
	 * <?xml version="1.0" encoding="UTF-8"?>
<!-- published at 2015-07-01 10:26:29 -->
<Profiles>
<Weather>
<city>青岛</city>
<status1>晴</status1>
<status2>晴</status2>
<figure1>qing</figure1>
<figure2>qing</figure2>
<direction1>北风</direction1>
<direction2>北风</direction2>
<power1>3-4</power1>
<power2>3-4</power2>
<temperature1>31</temperature1>
<temperature2>19</temperature2>
<ssd>8</ssd>
<tgd1>28</tgd1>
<tgd2>28</tgd2>
<zwx>4</zwx>
<ktk>4</ktk>
<pollution>1</pollution>
<xcz>4</xcz>
<zho></zho>
<diy></diy>
<fas></fas>
<chy>1</chy>
<zho_shuoming>暂无</zho_shuoming>
<diy_shuoming>暂无</diy_shuoming>
<fas_shuoming>暂无</fas_shuoming>
<chy_shuoming>短袖衫、短裙、短裤、薄型T恤衫、敞领短袖棉衫</chy_shuoming>
<pollution_l>优</pollution_l>
<zwx_l>强</zwx_l>
<ssd_l>较热</ssd_l>
<fas_l>暂无</fas_l>
<zho_l>暂无</zho_l>
<chy_l>薄短袖类</chy_l>
<ktk_l>不需要开启</ktk_l>
<xcz_l>不太适宜</xcz_l>
<diy_l>暂无</diy_l>
<pollution_s>非常有利于空气污染物扩散</pollution_s>
<zwx_s>紫外线强</zwx_s>
<ssd_s>户外活动不适宜在中午前后展开。</ssd_s>
<ktk_s>不需要开启空调</ktk_s>
<xcz_s>洗车后未来1-2天内有降水、大风或沙尘天气，不太适宜洗车</xcz_s>
<gm>1</gm>
<gm_l>低发期</gm_l>
<gm_s>环境温度较高，要提防长时间在空调环境中引发的空调病；</gm_s>
<yd>5</yd>
<yd_l>不适宜</yd_l>
<yd_s>天气炎热，不适宜户外运动；</yd_s>
<savedate_weather>2015-07-01</savedate_weather>
<savedate_life>2015-07-01</savedate_life>
<savedate_zhishu>2015-07-01</savedate_zhishu>
<udatetime>2015-07-01 07:58:00</udatetime>
</Weather>
</Profiles>

	 */
	private static final long serialVersionUID = 1L;
	private String city;
	private String status1;
	private String status2;
	private String figure1;
	private String figure2;
	private String direction1;
	private String direction2;
	private String power1;
	private String power2;
	private String temperature1;
	private String temperature2;
	private String ssd;
	private String tgd1;
	private String tgd2;
	private String zwx;
	private String ktk;
	private String pollution;
	private String xcz;
	private String zho;
	private String diy;
	private String fas;
	private String chy;
	private String zho_shuoming;
	private String diy_shuoming;
	private String fas_shuoming;
	private String chy_shuoming;
	private String pollution_l;
	private String zwx_l;
	private String ssd_l;
	private String fas_l;
	private String zho_l;
	private String chy_l;
	private String ktk_l;
	private String xcz_l;
	private String diy_l;
	private String pollution_s;
	private String zwx_s;
	private String ssd_s;
	private String ktk_s;
	private String xcz_s;
	private String gm;
	private String gm_l;
	private String gm_s;
	private String yd;
	private String yd_l;
	private String yd_s;
	private String savedate_weather;
	private String savedate_life;
	private String savedate_zhishu;
	private String udatetime;
	
	
	
	
	
	
	
	
	public String getCity() {
		return city;
	}
	public void setCity(String city) {
		this.city = city;
	}
	public String getStatus1() {
		return status1;
	}
	public void setStatus1(String status1) {
		this.status1 = status1;
	}
	public String getStatus2() {
		return status2;
	}
	public void setStatus2(String status2) {
		this.status2 = status2;
	}
	public String getFigure1() {
		return figure1;
	}
	public void setFigure1(String figure1) {
		this.figure1 = figure1;
	}
	public String getFigure2() {
		return figure2;
	}
	public void setFigure2(String figure2) {
		this.figure2 = figure2;
	}
	public String getDirection1() {
		return direction1;
	}
	public void setDirection1(String direction1) {
		this.direction1 = direction1;
	}
	public String getDirection2() {
		return direction2;
	}
	public void setDirection2(String direction2) {
		this.direction2 = direction2;
	}
	public String getPower1() {
		return power1;
	}
	public void setPower1(String power1) {
		this.power1 = power1;
	}
	public String getPower2() {
		return power2;
	}
	public void setPower2(String power2) {
		this.power2 = power2;
	}
	public String getTemperature1() {
		return temperature1;
	}
	public void setTemperature1(String temperature1) {
		this.temperature1 = temperature1;
	}
	public String getTemperature2() {
		return temperature2;
	}
	public void setTemperature2(String temperature2) {
		this.temperature2 = temperature2;
	}
	public String getSsd() {
		return ssd;
	}
	public void setSsd(String ssd) {
		this.ssd = ssd;
	}
	public String getTgd1() {
		return tgd1;
	}
	public void setTgd1(String tgd1) {
		this.tgd1 = tgd1;
	}
	public String getTgd2() {
		return tgd2;
	}
	public void setTgd2(String tgd2) {
		this.tgd2 = tgd2;
	}
	public String getZwx() {
		return zwx;
	}
	public void setZwx(String zwx) {
		this.zwx = zwx;
	}
	public String getKtk() {
		return ktk;
	}
	public void setKtk(String ktk) {
		this.ktk = ktk;
	}
	public String getPollution() {
		return pollution;
	}
	public void setPollution(String pollution) {
		this.pollution = pollution;
	}
	public String getXcz() {
		return xcz;
	}
	public void setXcz(String xcz) {
		this.xcz = xcz;
	}
	public String getZho() {
		return zho;
	}
	public void setZho(String zho) {
		this.zho = zho;
	}
	public String getDiy() {
		return diy;
	}
	public void setDiy(String diy) {
		this.diy = diy;
	}
	public String getFas() {
		return fas;
	}
	public void setFas(String fas) {
		this.fas = fas;
	}
	public String getChy() {
		return chy;
	}
	public void setChy(String chy) {
		this.chy = chy;
	}
	public String getZho_shuoming() {
		return zho_shuoming;
	}
	public void setZho_shuoming(String zho_shuoming) {
		this.zho_shuoming = zho_shuoming;
	}
	public String getDiy_shuoming() {
		return diy_shuoming;
	}
	public void setDiy_shuoming(String diy_shuoming) {
		this.diy_shuoming = diy_shuoming;
	}
	public String getFas_shuoming() {
		return fas_shuoming;
	}
	public void setFas_shuoming(String fas_shuoming) {
		this.fas_shuoming = fas_shuoming;
	}
	public String getChy_shuoming() {
		return chy_shuoming;
	}
	public void setChy_shuoming(String chy_shuoming) {
		this.chy_shuoming = chy_shuoming;
	}
	public String getPollution_l() {
		return pollution_l;
	}
	public void setPollution_l(String pollution_l) {
		this.pollution_l = pollution_l;
	}
	public String getZwx_l() {
		return zwx_l;
	}
	public void setZwx_l(String zwx_l) {
		this.zwx_l = zwx_l;
	}
	public String getSsd_l() {
		return ssd_l;
	}
	public void setSsd_l(String ssd_l) {
		this.ssd_l = ssd_l;
	}
	public String getFas_l() {
		return fas_l;
	}
	public void setFas_l(String fas_l) {
		this.fas_l = fas_l;
	}
	public String getZho_l() {
		return zho_l;
	}
	public void setZho_l(String zho_l) {
		this.zho_l = zho_l;
	}
	public String getChy_l() {
		return chy_l;
	}
	public void setChy_l(String chy_l) {
		this.chy_l = chy_l;
	}
	public String getKtk_l() {
		return ktk_l;
	}
	public void setKtk_l(String ktk_l) {
		this.ktk_l = ktk_l;
	}
	public String getXcz_l() {
		return xcz_l;
	}
	public void setXcz_l(String xcz_l) {
		this.xcz_l = xcz_l;
	}
	public String getDiy_l() {
		return diy_l;
	}
	public void setDiy_l(String diy_l) {
		this.diy_l = diy_l;
	}
	public String getPollution_s() {
		return pollution_s;
	}
	public void setPollution_s(String pollution_s) {
		this.pollution_s = pollution_s;
	}
	public String getZwx_s() {
		return zwx_s;
	}
	public void setZwx_s(String zwx_s) {
		this.zwx_s = zwx_s;
	}
	public String getSsd_s() {
		return ssd_s;
	}
	public void setSsd_s(String ssd_s) {
		this.ssd_s = ssd_s;
	}
	public String getKtk_s() {
		return ktk_s;
	}
	public void setKtk_s(String ktk_s) {
		this.ktk_s = ktk_s;
	}
	public String getXcz_s() {
		return xcz_s;
	}
	public void setXcz_s(String xcz_s) {
		this.xcz_s = xcz_s;
	}
	public String getGm() {
		return gm;
	}
	public void setGm(String gm) {
		this.gm = gm;
	}
	public String getGm_l() {
		return gm_l;
	}
	public void setGm_l(String gm_l) {
		this.gm_l = gm_l;
	}
	public String getGm_s() {
		return gm_s;
	}
	public void setGm_s(String gm_s) {
		this.gm_s = gm_s;
	}
	public String getYd() {
		return yd;
	}
	public void setYd(String yd) {
		this.yd = yd;
	}
	public String getYd_l() {
		return yd_l;
	}
	public void setYd_l(String yd_l) {
		this.yd_l = yd_l;
	}
	public String getYd_s() {
		return yd_s;
	}
	public void setYd_s(String yd_s) {
		this.yd_s = yd_s;
	}
	public String getSavedate_weather() {
		return savedate_weather;
	}
	public void setSavedate_weather(String savedate_weather) {
		this.savedate_weather = savedate_weather;
	}
	public String getSavedate_life() {
		return savedate_life;
	}
	public void setSavedate_life(String savedate_life) {
		this.savedate_life = savedate_life;
	}
	public String getSavedate_zhishu() {
		return savedate_zhishu;
	}
	public void setSavedate_zhishu(String savedate_zhishu) {
		this.savedate_zhishu = savedate_zhishu;
	}
	public String getUdatetime() {
		return udatetime;
	}
	public void setUdatetime(String udatetime) {
		this.udatetime = udatetime;
	}
	@Override
	public String toString() {
		return "WeatherInfo [city=" + city + ", status1=" + status1
				+ ", status2=" + status2 + ", figure1=" + figure1
				+ ", figure2=" + figure2 + ", direction1=" + direction1
				+ ", direction2=" + direction2 + ", power1=" + power1
				+ ", power2=" + power2 + ", temperature1=" + temperature1
				+ ", temperature2=" + temperature2 + ", ssd=" + ssd + ", tgd1="
				+ tgd1 + ", tgd2=" + tgd2 + ", zwx=" + zwx + ", ktk=" + ktk
				+ ", pollution=" + pollution + ", xcz=" + xcz + ", zho=" + zho
				+ ", diy=" + diy + ", fas=" + fas + ", chy=" + chy
				+ ", zho_shuoming=" + zho_shuoming + ", diy_shuoming="
				+ diy_shuoming + ", fas_shuoming=" + fas_shuoming
				+ ", chy_shuoming=" + chy_shuoming + ", pollution_l="
				+ pollution_l + ", zwx_l=" + zwx_l + ", ssd_l=" + ssd_l
				+ ", fas_l=" + fas_l + ", zho_l=" + zho_l + ", chy_l=" + chy_l
				+ ", ktk_l=" + ktk_l + ", xcz_l=" + xcz_l + ", diy_l=" + diy_l
				+ ", pollution_s=" + pollution_s + ", zwx_s=" + zwx_s
				+ ", ssd_s=" + ssd_s + ", ktk_s=" + ktk_s + ", xcz_s=" + xcz_s
				+ ", gm=" + gm + ", gm_l=" + gm_l + ", gm_s=" + gm_s + ", yd="
				+ yd + ", yd_l=" + yd_l + ", yd_s=" + yd_s
				+ ", savedate_weather=" + savedate_weather + ", savedate_life="
				+ savedate_life + ", savedate_zhishu=" + savedate_zhishu
				+ ", udatetime=" + udatetime + "]";
	}
	
	
	
	
}

过程中遇到的问题： 

      由于是第一次使用jaxb，对要用到的注解不熟悉，这里再说明一下，
    根元素需要添加注解@XmlRootElement(name="xx") , name值与xml的节点名字相同，
    @XmlElement是与xml文档中的节点对应的，@XmlElementxml只能添加在get/set方法上，添加在成员变量上会出现异常。
    @xmlattribute是对应xml文档中的属性，比如<node id="xx">是对应id的。