获取JSON中的直接获取或遍历

基本格式

 var person = {"name":"张三",age:23,"gender":true}
    for{var key in person}//遍历
     {
        alert(key+":"+person[key]);//获取键和值 key为字符串格式
     }

数组格式

   var ps = [{"name":"张三","age":23,"gender":true},{"name":"李四","age":24,"gender":true}
   ,{"name":"王五","age":25,"gender":false}]
   for{var i=0; i<ps.length:i++}//遍历
   {
      var p = ps[i];
     for(var key in p)
     {
        alert(key+":"+p[key]);
     }
   }

嵌套格式

var persons = {"persons":
                    [{"name":"张三","age":23,"gender":true},
                     {"name":"李四","age":24,"gender":true},
                     {"name":"王五","age":25,"gender":false}]};
					//获取王五的值
					var name = persons.persons[2].name