JSON数据格式

Demo: JSON 表示一个数字
2.90

Demo: JSON 表示一个字符串
"Hello world"

Demo: JSON 表示一个对象
{
  "name":"smith".
  "age":30,
  "sex":"男"
}

Demo: JSON对象的属性可以是对象
{
  "name":"smith".
  "age":28,
  "sex":"男"
  "school":{
  "sname":"南京大学".
  "address":"南京市鼓楼区汉口路22号"
}
}

Demo: JSON 格式表示数组
保存名字的数组: ["张三","李四","王五"]
保存雇员的信息: ["smith",1001,"clerck",7788,2000.00,200.0]
[
  ["smith",1001,"clerck",7788,2000.00,200.0]
  ["smith",1001,"clerck",7788,2000.00,200.0]
  ["smith",1001,"clerck",7788,2000.00,200.0]
]
[
  {"name":"smith","empno":1001,"job":"clerck","sal":9000.00,"comm":5000.00},
  {"name":"smith","empno":1001,"job":"clerck","sal":9000.00,"comm":5000.00},
  {"name":"smith","empno":1001,"job":"clerck","sal":9000.00,"comm":5000.00},
]

Demo: 对象数组
在一个数组保存多个 json 对象 (在一个数组中保存多个对象)
[
  {
    "title":"Java 开发",
    "edition":3,
    "author":["smith","张三","李四"]
  },
  {
    "title":"Web 开发",
    "edition":3,
    "author":["Allen","王五","赵六"]
  }
]
二维数组保存
[
  ["Java 开发",3,["smith","张三","李四"]],
  ["Web 开发",3["Allen","王五","赵六"]]
]

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