json字符串、json对象、数组 三者之间的转换

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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)

json对象转化成json字符串

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

例如

例如：

<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":"03","open":false,"pId":"0","name":"A部门"},{"id":"04","open":false,"pId":"0","name":"A部门"}, {"id":"05","open":false,"pId":"0","name":"A部门"}, {"id":"06","open":false,"pId":"0","name":"A部门"}]';
      //  var jsonObj = $.parseJSON(jsonStr);
      var jsonObj =  JSON.parse(jsonStr)
        console.log(jsonObj)
     var jsonStr1 = JSON.stringify(jsonObj)
     console.log(jsonStr1+"jsonStr1")
    </script>

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":"03","open":false,"pId":"0","name":"A部门"},{"id":"04","open":false,"pId":"0","name":"A部门"}, {"id":"05","open":false,"pId":"0","name":"A部门"}, {"id":"06","open":false,"pId":"0","name":"A部门"}]';
      //  var jsonObj = $.parseJSON(jsonStr);
      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>