json对象和json字符串之间的转化

json对象和json字符串之间的转化
json字符串----->json对象
使用JSON.parse()函数

var jsonStr = '{"name":"zhangsan","age":23,"email":"[e-mail]"}';
var json = JSON.parse(jsonStr);
console.log(json);//输出:Object {name: "zhangsan", age: 23, email: "[e-mail]"}
使用eval（)函数

var jsonStr = '{"name":"zhangsan","age":23,"email":"[e-mail]"}';
var json = eval（"(" + jsonStr + ")");
console.log(json);//输出:Object {name: "zhangsan", age: 23, email: "[e-mail]"}
使用jQuery插件jQuery.parseJSON()

var jsonStr = '{"name":"zhangsan","age":23,"email":"[e-mail]"}';
var json = jQuery.parseJSON(jsonStr);
console.log(json);//输出:Object {name: "zhangsan", age: 23, email: "[e-mail]"}
json对象------>json字符串
使用JSON.stringify()

var json = {name: "zhangsan", age: 23, email: "[e-mail]"};
var jsonStr = JSON.stringify(json);
console.log(jsonStr);//输出:"{"name":"zhangsan","age":23,"email":"[e-mail]"}"
把数据在前后端之间传递，需要把json对象转换为json字符串