json 总结
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json 是存储和交换文本信息的语法
1 JSON 指的是 JavaScript 对象表示法(JavaScript Object Notation)
2 语法: 名称/值 "firstname":"sb"
3 对象:可以包含多个名称/值对,用花括号 { "firstName":"John" , "lastName":"Doe" }
4 数组:在方括号中可以包含多个对象
{
"employees": [
{ "firstName":"John" , "lastName":"Doe" },
{ "firstName":"Anna" , "lastName":"Smith" },
{ "firstName":"Peter" , "lastName":"Jones" }
]
}
5 json 使用js 语法
法一:
var employees = [
{ "firstName":"Bill" , "lastName":"Gates" },
{ "firstName":"George" , "lastName":"Bush" },
{ "firstName":"Thomas" , "lastName": "Carter" }
];
employees[0].lastName;
法二:
var txt = '{ "employees" : [' +
'{ "firstName":"Bill" , "lastName":"Gates" },' +
'{ "firstName":"George" , "lastName":"Bush" },' +
'{ "firstName":"Thomas" , "lastName":"Carter" } ]}';
txt.employees[0].lastName
1 JSON 指的是 JavaScript 对象表示法(JavaScript Object Notation)
2 语法: 名称/值 "firstname":"sb"
3 对象:可以包含多个名称/值对,用花括号 { "firstName":"John" , "lastName":"Doe" }
4 数组:在方括号中可以包含多个对象
{
"employees": [
{ "firstName":"John" , "lastName":"Doe" },
{ "firstName":"Anna" , "lastName":"Smith" },
{ "firstName":"Peter" , "lastName":"Jones" }
]
}
5 json 使用js 语法
法一:
var employees = [
{ "firstName":"Bill" , "lastName":"Gates" },
{ "firstName":"George" , "lastName":"Bush" },
{ "firstName":"Thomas" , "lastName": "Carter" }
];
employees[0].lastName;
法二:
var txt = '{ "employees" : [' +
'{ "firstName":"Bill" , "lastName":"Gates" },' +
'{ "firstName":"George" , "lastName":"Bush" },' +
'{ "firstName":"Thomas" , "lastName":"Carter" } ]}';
txt.employees[0].lastName
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