挑选你熟悉省份,制作xml城市列表 ----- 必备城市基本信息 10个城市 --- 一定要有属性
对城市列表 添加DTD约束
<?xml version="1.0" encoding="UTF-8"?> <!-- 使用内部DTD约束XML [] 内部编写DTD内容--> <!DOCTYPE province[ <!ELEMENT province (city+)> <!ELEMENT city (name,num)> <!ATTLIST city cid ID #REQUIRED weather CDATA #REQUIRED > ]> <province> <city cid="c20" weather="sunny"> <name>合肥</name> <num>1</num> </city> <city cid="c21" weather="sunny"> <name>宿州</name> <num>2</num> </city> <city cid="c24" weather="sunny"> <name>淮北</name> <num>3</num> </city> <city cid="c1" weather="hailstone"> <name>安庆</name> <num>4</num> </city> <city cid="c60" weather="rain"> <name>芜湖</name> <num>5</num> </city> <city cid="c77" weather="rain"> <name>马鞍山</name> <num>6</num> </city> <city cid="c34" weather="rain"> <name>黄山</name> <num>7</num> </city> <city cid="c70" weather="rain"> <name>铜陵</name> <num>8</num> </city> <city cid="c200" weather="rain"> <name>六安</name> <num>9</num> </city> <city cid="c201" weather="rain"> <name>淮南</name> <num>10</num> </city> </province>