免费开放的API
1）新浪IP地址查询API接口
http://int.dpool.sina.com.cn/iplookup/iplookup.php?format=js&ip=IP地址
format有 js、xml、json三种，文字经过utf-8编码
2）雅虎天气预报
http://weather.yahooapis.com/forecastrss?w=2151330&u=c
w=2151330城市代码u=c温度单位，城市代码查询
http://weather.yahoo.com/
3）中国天气网天气预报（http://www.weather.com.cn/crossdomain.xml）
http://www.weather.com.cn/data/sk/101010100.html
http://www.weather.com.cn/data/cityinfo/101010100.htm
http://m.weather.com.cn/data/101010100.html
城市代码："北京", 101010100, "朝阳", 101010300, "顺义", 101010400, "怀柔", 101010500, "通州", 101010600, "昌平", 101010700, "延庆", 101010800, "丰台", 101010900, "石景山", 101011000, "大兴", 101011100, "房山", 101011200, "密云", 101011300, "门头沟", 101011400, "平谷", 101011500, "八达岭", 101011600, "佛爷顶", 101011700, "汤河口", 101011800, "密云上甸子", 101011900, "斋堂", 101012000, "霞云岭", 101012100, "北京城区", 101012200, "海淀", 101010200, "天津", 101030100, "宝坻", 101030300, "东丽", 101030400, "西青", 101030500, "北辰", 101030600, "蓟县", 101031400, "汉沽", 101030800, "静海", 101030900, "津南", 101031000, "塘沽", 101031100, "大港", 101031200, "武清", 101030200, "宁河", 101030700, "上海", 101020100, "宝山", 101020300, "嘉定", 101020500, "南汇", 101020600, "浦东", 101021300, "青浦", 101020800, "松江", 101020900, "奉贤", 101021000, "崇明", 101021100, "徐家汇", 101021200, "闵行", 101020200, "金山", 101020700, "石家庄", 101090101, "张家口", 101090301, "承德", 101090402, "唐山", 101090501, "秦皇岛", 101091101, "沧州", 101090701, "衡水", 101090801, "邢台", 101090901, "邯郸", 101091001, "保定", 101090201, "廊坊", 101090601, "郑州", 101180101, "新乡", 101180301, "许昌", 101180401, "平顶山", 101180501, "信阳", 101180601, "南阳", 101180701, "开封", 101180801, "洛阳", 101180901, "商丘", 101181001, "焦作", 101181101, "鹤壁", 101181201, "濮阳", 101181301, "周口", 101181401, "漯河", 101181501, "驻马店", 101181601, "三门峡", 101181701, "济源", 101181801, "安阳", 101180201, "合肥", 101220101, "芜湖", 101220301, "淮南", 101220401, "马鞍山", 101220501, "安庆", 101220601, "宿州", 101220701, "阜阳", 101220801, "亳州", 101220901, "黄山", 101221001, "滁州", 101221101, "淮北", 101221201, "铜陵", 101221301, "宣城", 101221401, "六安", 101221501, "巢湖", 101221601, "池州", 101221701, "蚌埠", 101220201, "杭州", 101210101, "舟山", 101211101, "湖州", 101210201, "嘉兴", 101210301, "金华", 101210901, "绍兴", 101210501, "台州", 101210601, "温州", 101210701, "丽水", 101210801, "衢州", 101211001, "宁波", 101210401, "重庆", 101040100, "合川", 101040300, "南川", 101040400, "江津", 101040500, "万盛", 101040600, "渝北", 101040700, "北碚", 101040800, "巴南", 101040900, "长寿", 101041000, "黔江", 101041100, "万州天城", 101041200, "万州龙宝", 101041300, "涪陵", 101041400, "开县", 101041500, "城口", 101041600, "云阳", 101041700, "巫溪", 101041800, "奉节", 101041900, "巫山", 101042000, "潼南", 101042100, "垫江", 101042200, "梁平", 101042300, "忠县", 101042400, "石柱", 101042500, "大足", 101042600, "荣昌", 101042700, "铜梁", 101042800, "璧山", 101042900, "丰都", 101043000, "武隆", 101043100, "彭水", 101043200, "綦江", 101043300, "酉阳", 101043400, "秀山", 101043600, "沙坪坝", 101043700, "永川", 101040200, "福州", 101230101, "泉州", 101230501, "漳州", 101230601, "龙岩", 101230701, "晋江", 101230509, "南平", 101230901, "厦门", 101230201, "宁德", 101230301, "莆田", 101230401, "三明", 101230801, "兰州", 101160101, "平凉", 101160301, "庆阳", 101160401, "武威", 101160501, "金昌", 101160601, "嘉峪关", 101161401, "酒泉", 101160801, "天水", 101160901, "武都", 101161001, "临夏", 101161101, "合作", 101161201, "白银", 101161301, "定西", 101160201, "张掖", 101160701, "广州", 101280101, "惠州", 101280301, "梅州", 101280401, "汕头", 101280501, "深圳", 101280601, "珠海", 101280701, "佛山", 101280800, "肇庆", 101280901, "湛江", 101281001, "江门", 101281101, "河源", 101281201, "清远", 101281301, "云浮", 101281401, "潮州", 101281501, "东莞", 101281601, "中山", 101281701, "阳江", 101281801, "揭阳", 101281901, "茂名", 101282001, "汕尾", 101282101, "韶关", 101280201, "南宁", 101300101, "柳州", 101300301, "来宾", 101300401, "桂林", 101300501, "梧州", 101300601, "防城港", 101301401, "贵港", 101300801, "玉林", 101300901, "百色", 101301001, "钦州", 101301101, "河池", 101301201, "北海", 101301301, "崇左", 101300201, "贺州", 101300701, "贵阳", 101260101, "安顺", 101260301, "都匀", 101260401, "兴义", 101260906, "铜仁", 101260601, "毕节", 101260701, "六盘水", 101260801, "遵义", 101260201, "凯里", 101260501, "昆明", 101290101, "红河", 101290301, "文山", 101290601, "玉溪", 101290701, "楚雄", 101290801, "普洱", 101290901, "昭通", 101291001, "临沧", 101291101, "怒江", 101291201, "香格里拉", 101291301, "丽江", 101291401, "德宏", 101291501, "景洪", 101291601, "大理", 101290201, "曲靖", 101290401, "保山", 101290501, "呼和浩特", 101080101, "乌海", 101080301, "集宁", 101080401, "通辽", 101080501, "阿拉善左旗", 101081201, "鄂尔多斯", 101080701, "临河", 101080801, "锡林浩特", 101080901, "呼伦贝尔", 101081000, "乌兰浩特", 101081101, "包头", 101080201, "赤峰", 101080601, "南昌", 101240101, "上饶", 101240301, "抚州", 101240401, "宜春", 101240501, "鹰潭", 101241101, "赣州", 101240701, "景德镇", 101240801, "萍乡", 101240901, "新余", 101241001, "九江", 101240201, "吉安", 101240601, "武汉", 101200101, "黄冈", 101200501, "荆州", 101200801, "宜昌", 101200901, "恩施", 101201001, "十堰", 101201101, "神农架", 101201201, "随州", 101201301, "荆门", 101201401, "天门", 101201501, "仙桃", 101201601, "潜江", 101201701, "襄樊", 101200201, "鄂州", 101200301, "孝感", 101200401, "黄石", 101200601, "咸宁", 101200701, "成都", 101270101, "自贡", 101270301, "绵阳", 101270401, "南充", 101270501, "达州", 101270601, "遂宁", 101270701, "广安", 101270801, "巴中", 101270901, "泸州", 101271001, "宜宾", 101271101, "内江", 101271201, "资阳", 101271301, "乐山", 101271401, "眉山", 101271501, "凉山", 101271601, "雅安", 101271701, "甘孜", 101271801, "阿坝", 101271901, "德阳", 101272001, "广元", 101272101, "攀枝花", 101270201, "银川", 101170101, "中卫", 101170501, "固原", 101170401, "石嘴山", 101170201, "吴忠", 101170301, "西宁", 101150101, "黄南", 101150301, "海北", 101150801, "果洛", 101150501, "玉树", 101150601, "海西", 101150701, "海东", 101150201, "海南", 101150401, "济南", 101120101, "潍坊", 101120601, "临沂", 101120901, "菏泽", 101121001, "滨州", 101121101, "东营", 101121201, "威海", 101121301, "枣庄", 101121401, "日照", 101121501, "莱芜", 101121601, "聊城", 101121701, "青岛", 101120201, "淄博", 101120301, "德州", 101120401, "烟台", 101120501, "济宁", 101120701, "泰安", 101120801, "西安", 101110101, "延安", 101110300, "榆林", 101110401, "铜川", 101111001, "商洛", 101110601, "安康", 101110701, "汉中", 101110801, "宝鸡", 101110901, "咸阳", 101110200, "渭南", 101110501, "太原", 101100101, "临汾", 101100701, "运城", 101100801, "朔州", 101100901, "忻州", 101101001, "长治", 101100501, "大同", 101100201, "阳泉", 101100301, "晋中", 101100401, "晋城", 101100601, "吕梁", 101101100, "乌鲁木齐", 101130101, "石河子", 101130301, "昌吉", 101130401, "吐鲁番", 101130501, "库尔勒", 101130601, "阿拉尔", 101130701, "阿克苏", 101130801, "喀什", 101130901, "伊宁", 101131001, "塔城", 101131101, "哈密", 101131201, "和田", 101131301, "阿勒泰", 101131401, "阿图什", 101131501, "博乐", 101131601, "克拉玛依", 101130201, "拉萨", 101140101, "山南", 101140301, "阿里", 101140701, "昌都", 101140501, "那曲", 101140601, "日喀则", 101140201, "林芝", 101140401, "台北县", 101340101, "高雄", 101340201, "台中", 101340401, "海口", 101310101, "三亚", 101310201, "东方", 101310202, "临高", 101310203, "澄迈", 101310204, "儋州", 101310205, "昌江", 101310206, "白沙", 101310207, "琼中", 101310208, "定安", 101310209, "屯昌", 101310210, "琼海", 101310211, "文昌", 101310212, "保亭", 101310214, "万宁", 101310215, "陵水", 101310216, "西沙", 101310217, "南沙岛", 101310220, "乐东", 101310221, "五指山", 101310222, "琼山", 101310102, "长沙", 101250101, "株洲", 101250301, "衡阳", 101250401, "郴州", 101250501, "常德", 101250601, "益阳", 101250700, "娄底", 101250801, "邵阳", 101250901, "岳阳", 101251001, "张家界", 101251101, "怀化", 101251201, "黔阳", 101251301, "永州", 101251401, "吉首", 101251501, "湘潭", 101250201, "南京", 101190101, "镇江", 101190301, "苏州", 101190401, "南通", 101190501, "扬州", 101190601, "宿迁", 101191301, "徐州", 101190801, "淮安", 101190901, "连云港", 101191001, "常州", 101191101, "泰州", 101191201, "无锡", 101190201, "盐城", 101190701, "哈尔滨", 101050101, "牡丹江", 101050301, "佳木斯", 101050401, "绥化", 101050501, "黑河", 101050601, "双鸭山", 101051301, "伊春", 101050801, "大庆", 101050901, "七台河", 101051002, "鸡西", 101051101, "鹤岗", 101051201, "齐齐哈尔", 101050201, "大兴安岭", 101050701, "长春", 101060101, "延吉", 101060301, "四平", 101060401, "白山", 101060901, "白城", 101060601, "辽源", 101060701, "松原", 101060801, "吉林", 101060201, "通化", 101060501, "沈阳", 101070101, "鞍山", 101070301, "抚顺", 101070401, "本溪", 101070501, "丹东", 101070601, "葫芦岛", 101071401, "营口", 101070801, "阜新", 101070901, "辽阳", 101071001, "铁岭", 101071101, "朝阳", 101071201, "盘锦", 101071301, "大连", 101070201, "锦州", 101070701
