1.json字符串转化成json对象

// jquery的方法
var jsonObj = $.parseJSON(jsonStr)
//js 的方法
var jsonObj =  JSON.parse(jsonStr)

2.json对象转化成json字符串

//js方法
var jsonStr1 = JSON.stringify(jsonObj)

3.json对象转化成数组

<script type="text/javascript">
 var jsonStr = '[{"id":"01","open":false,"pId":"0","name":"A部门"}, 
                 {"id":"01","open":false,"pId":"0","name":"A部门"}, 
                 {"id":"011","open":false,"pId":"01","name":"A部门"},  
                 {"id":"06","open":false,"pId":"0","name":"A部门"}]';
      
      var jsonObj =  JSON.parse(jsonStr)
        console.log(jsonObj) 

     var jsonStr1 = JSON.stringify(jsonObj)
         console.log(jsonStr1+"jsonStr1")

     var jsonArr = [];
     for(var i =0 ;i < jsonObj.length;i++){
            jsonArr[i] = jsonObj[i];
     }
     console.log(typeof(jsonArr))
</script>