在javascript中JSON对象和JSON字符串的转换及取值

1.json类型的字符串转换为json对象及取值

1 　var jsonString = '{"bar":"property","baz":3}';
2   var jsObject = JSON.parse(jsonString);    //转换为json对象
3   alert(jsObject.bar);    //取json中的值

 2.json对象转为json类型的字符串

var json = [Object obj];

var st = JSON.stringify(json); //转换为json类型的字符串　　

alert(st) //可以看到json对象里面的字段名

3.json数组类型的字符串转换为json及取值 和json对象转换为转换为json字符串

 //json数组类型字符串取值
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 =  JSON.parse(jsonStr);//转换为json对象
for(var i=0;i){
        alert(jsonObj[i].id);  //取json中的值
}
console.log(jsonObj)
var jsonStr1 = JSON.stringify(jsonObj)
console.log(jsonStr1+"jsonStr1")

原文请见：https://www.cnblogs.com/tangbang/p/tb.html