JSON對象和JSON字符串之間的轉換

一.  JSON對象和JSON字符串之間的轉換

1. json字符串----->json對象

   • 使用JSON.parse()函數

     var jsonStr = '{"name":"zhangsan","age":23,"email":"chentging@aliyun.com"}'; var json = JSON.parse(jsonStr); console.log(json);//輸出:Object {name: "zhangsan", age: 23, email: "chentging@aliyun.com"}

   • 使用eval()函數

     var jsonStr = '{"name":"zhangsan","age":23,"email":"chentging@aliyun.com"}'; var json = eval ("(" + jsonStr + ")"); console.log(json);//輸出:Object {name: "zhangsan", age: 23, email: "chentging@aliyun.com"}

   • 使用jQuery插件jQuery.parseJSON()

     var jsonStr = '{"name":"zhangsan","age":23,"email":"chentging@aliyun.com"}'; var json = jQuery.parseJSON(jsonStr); console.log(json);//輸出:Object {name: "zhangsan", age: 23, email: "chentging@aliyun.com"}

2. json對象------>json字符串

• 使用JSON.stringify()

  var json = {name: "zhangsan", age: 23, email: "chentging@aliyun.com"}; var jsonStr = JSON.stringify(json); console.log(jsonStr);//輸出:"{"name":"zhangsan","age":23,"email":"chentging@aliyun.com"}"

3. 把數據在先後端之間傳遞，須要把json對象轉換爲json字符串