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Java实现Map集合二级联动

发布时间:2017-07-14 00:01:53
Map集合可以保存键值映射关系,这非常适合本实例所需要的数据结构,所有省份信息可以保存为Map集合的键,而每个键可以保存对应的城市信息,本实例就是利用Map集合实现了省市级联选择框,当选择省份信息时,将改变城市下拉选择框对应的内容。思路分析:1. 创建全国(省,直辖市,自治区 ...

Java实现Map集合二级联动

Map集合可以保存键值映射关系,这非常适合本实例所需要的数据结构,所有省份信息可以保存为Map集合的键,而每个键可以保存对应的城市信息,本实例就是利用Map集合实现了省市级联选择框,当选择省份信息时,将改变城市下拉选择框对应的内容。

思路分析:

1. 创建全国(省,直辖市,自治区)映射集合,即LinkedHashMap对象,使用Map接口的put()方法向集合中添加指定的省与城市的映射关系,其中值为String型一维数组。

 1 import java.util.LinkedHashMap; 2 import java.util.Map; 3  4 public class CityMap { 5   /** 6    * 全国(省,直辖市,自治区)映射集合 7   */ 8   public static Map<String,String[]> model=new LinkedHashMap<String, String[]>(); 9   static{10     model.put("北京", new String[]{"北京"});11     model.put("上海", new String[]{"上海"});12     model.put("天津", new String[]{"天津"});13     model.put("重庆", new String[]{"重庆"});14     model.put("黑龙江", new String[]{"哈尔滨","齐齐哈尔","牡丹江","大庆","伊春","双鸭山","鹤岗","鸡西","佳木斯","七台河","黑河","绥化","大兴安岭"});15     model.put("吉林", new String[]{"长春","延边","吉林","白山","白城","四平","松原","辽源","大安","通化"});16     model.put("辽宁", new String[]{"沈阳","大连","葫芦岛","旅顺","本溪","抚顺","铁岭","辽阳","营口","阜新","朝阳","锦州","丹东","鞍山"});17     model.put("内蒙古", new String[]{"呼和浩特","呼伦贝尔","锡林浩特","包头","赤峰","海拉尔","乌海","鄂尔多斯","通辽"});18     model.put("河北", new String[]{"石家庄","唐山","张家口","廊坊","邢台","邯郸","沧州","衡水","承德","保定","秦皇岛"});19     model.put("河南", new String[]{"郑州","开封","洛阳","平顶山","焦作","鹤壁","新乡","安阳","濮阳","许昌","漯河","三门峡","南阳","商丘","信阳","周口","驻马店"});20     model.put("山东", new String[]{"济南","青岛","淄博","威海","曲阜","临沂","烟台","枣庄","聊城","济宁","菏泽","泰安","日照","东营","德州","滨州","莱芜","潍坊"});21     model.put("山西", new String[]{"太原","阳泉","晋城","晋中","临汾","运城","长治","朔州","忻州","大同","吕梁"});22     model.put("江苏", new String[]{"南京","苏州","昆山","南通","太仓","吴县","徐州","宜兴","镇江","淮安","常熟","盐城","泰州","无锡","连云港","扬州","常州","宿迁"});23     model.put("安徽", new String[]{"合肥","巢湖","蚌埠","安庆","六安","滁州","马鞍山","阜阳","宣城","铜陵","淮北","芜湖","毫州","宿州","淮南","池州"});24     model.put("陕西", new String[]{"西安","韩城","安康","汉中","宝鸡","咸阳","榆林","渭南","商洛","铜川","延安"});25     model.put("宁夏", new String[]{"银川","固原","中卫","石嘴山","吴忠"});26     model.put("甘肃", new String[]{"兰州","白银","庆阳","酒泉","天水","武威","张掖","甘南","临夏","平凉","定西","金昌"});27     model.put("青海", new String[]{"西宁","海北","海西","黄南","果洛","玉树","海东","海南"});28     model.put("湖北", new String[]{"武汉","宜昌","黄冈","恩施","荆州","神农架","十堰","咸宁","襄樊","孝感","随州","黄石","荆门","鄂州"});29     model.put("湖南", new String[]{"长沙","邵阳","常德","郴州","吉首","株洲","娄底","湘潭","益阳","永州","岳阳","衡阳","怀化","韶山","张家界"});30     model.put("浙江", new String[]{"杭州","湖州","金华","宁波","丽水","绍兴","雁荡山","衢州","嘉兴","台州","舟山","温州"});31     model.put("江西", new String[]{"南昌","萍乡","九江","上饶","抚州","吉安","鹰潭","宜春","新余","景德镇","赣州"});32     model.put("福建", new String[]{"福州","厦门","龙岩","南平","宁德","莆田","泉州","三明","漳州"});33     model.put("贵州", new String[]{"贵阳","安顺","赤水","遵义","铜仁","六盘水","毕节","凯里","都匀"});34     model.put("四川", new String[]{"成都","泸州","内江","凉山","阿坝","巴中","广元","乐山","绵阳","德阳","攀枝花","雅安","宜宾","自贡","甘孜州","达州","资阳","广安","遂宁","眉山","南充"});35     model.put("广东", new String[]{"广州","深圳","潮州","韶关","湛江","惠州","清远","东莞","江门","茂名","肇庆","汕尾","河源","揭阳","梅州","中山","德庆","阳江","云浮","珠海","汕头","佛山"});36     model.put("广西", new String[]{"南宁","桂林","阳朔","柳州","梧州","玉林","桂平","贺州","钦州","贵港","防城港","百色","北海","河池","来宾","崇左"});37     model.put("云南", new String[]{"昆明","保山","楚雄","德宏","红河","临沧","怒江","曲靖","思茅","文山","玉溪","昭通","丽江","大理"});38     model.put("海南", new String[]{"海口","三亚","儋州","琼山","通什","文昌"});39     model.put("新疆", new String[]{"乌鲁木齐","阿勒泰","阿克苏","昌吉","哈密","和田","喀什","克拉玛依","石河子","塔城","库尔勒","吐鲁番","伊宁"});40   }41 }

原标题:Java实现Map集合二级联动

关键词:JAVA

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