JSON.parse(),JSON.stringify(),jQuery.parseJSON()的用法

 摘自:https://www.cnblogs.com/whh412/p/5627088.html

1. JSON.parse(jsonString): 在一个字符串中解析出JSON对象

1 2 3 var  str =  ‘[{"href":"baidu.com","text":"test","orgId":123,"dataType":"curry","activeClass":"haha"}]‘ ;   JSON.parse(str);

  结果:

2. JSON.stringify(obj) : 将一个JSON对象转换成字符串

1 2 3 var  obj = [{ "href" : "baidu.com" , "text" : "test" , "orgId" :123, "dataType" : "curry" , "activeClass" : "haha" }];   JSON.stringify(obj);

  结果:

1 "[{" href ":" baidu.com "," text ":" test "," orgId ":123," dataType ":" curry "," activeClass ":" haha "}]"

  

3. jQuery.parseJSON(jsonString) : 将格式完好的JSON字符串转为与之对应的JavaScript对象 

1 2 3 var  str =  ‘[{"href":"baidu.com","text":"test","orgId":123,"dataType":"curry","activeClass":"haha"}]‘ ;   jQuery.parseJSON(str);

  结果:

4.JSON.parse()和jQuery.parseJSON()的区别:
有的浏览器不支持JSON.parse()方法,使用jQuery.parseJSON()方法时,在浏览器支持时会返回执行JSON.parse()方法的结果,否则会返回类似执行eval()方法的结果,以上结论参考jquery 1.9.1 得出:

 

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 parseJSON:  function ( data ) {      // Attempt to parse using the native JSON parser first      if  ( window.JSON && window.JSON.parse ) {          return  window.JSON.parse( data );      }          if  ( data ===  null  ) {          return  data;      }          if  typeof  data ===  "string"  ) {              // Make sure leading/trailing whitespace is removed (IE can‘t handle it)          data = jQuery.trim( data );              if  ( data ) {              // Make sure the incoming data is actual JSON              // Logic borrowed from http://json.org/json2.js              if  ( rvalidchars.test( data.replace( rvalidescape,  "@"  )                  .replace( rvalidtokens,  "]"  )                  .replace( rvalidbraces,  "" )) ) {                      return  new  Function(  "return "  + data ) )();              }          }      }          jQuery.error(  "Invalid JSON: "  + data ); },