json数据格式常见操作示例

<script>
//var json3={name:"longzhoufeng",age:123}//第一种方式
var json3={"name":"longzhoufeng","age":123}//推荐这种方式，加引号，安全性高一点，转换格式好一些
for( var attr in json3){
  //alert(attr)//name,age
  console.log(json3[attr])//longzhoufeng,123
}
</script>

<script>
var arr=[{"name":"longzhoufeng","age":123},{"name":"minigui","age":25}]
var parn=arr[0].name+"今年多少岁"+arr[1].age
console.log(parn)
</script>

<script>
//对象里包数组
var json4={
  "url":["img/1.jpg","img/2.jpg","img/3.jpg","img/4.jpg"],
  "text":["aaaa","bbbb","","dddd"]
}
for(var att in json4){
  console.log(json4[att])
  for(var i=0;i<json4[att].length;i++){
    console.log(json4[att][i])
  }
}
</script>

<script>
var json5=[{"姓名":"longzhoufeng","年龄":123},{"姓名":"minigui","年龄":25}]
for(var i=0;i<json5.length;i++){
  for(var att in json5[i]){
    //alert(att)
    console.log(json5[i][att])
  }
}
</script>