/**
* 數(shù)據(jù)
*/
var school = [{id:1,name:'一年級'},{id:2,name:'二年級'},{id:3,name:'三年級'}];

    /**
     * 對象轉(zhuǎn)JSON字符串
     */
    var str = JSON.stringify(school);
    
    console.log(str)    
    
    //輸出：[{"id":1,"name":"一年級"},{"id":2,"name":"二年級"},{"id":3,"name":"三年級"}]
    
    
    /**
     * JSON字符串轉(zhuǎn)對象
     */
    var obj = JSON.parse(str);
    
    console.log(obj)   
    
    //輸出：[Object, Object, Object]