二话不说先上代码：
$.ajax({
type: "GET",
url: "",
data: {},
async: true,
dataType:"json",
success: function(returnedData) {
var jsonObj = JSON.parse( JSON.stringify(returnedData) );
$("body").append('<h2>' + JSON.parse(jsonObj.newslist[0]).content + '</h2>');
},
error: function(e) {
alert(e);
alert("error");
//请求失败时调用此函数
}
});
1、JSON.stringify(returnedData)的数据：
{"newslist":["{\"content\":\"2016.10.10开始做网站了呢\",\"id\":1,\"author\":\"zhao\",\"time\":\"2016-10-11 14:37:54.0\",\"title\":\"开始做网站\",\"type\":0,\"pictureurl\":\"http//:www.gto.com\"}","{\"content\":\"2016.10.10开始做网站了呢，大家很努力\",\"id\":2,\"author\":\"zhaoxin\",\"time\":\"2016-10-11 14:37:54.0\",\"title\":\"大家很努力\",\"type\":1,\"pictureurl\":\"http//:www.gto.com\"}","{\"content\":\"2016.10.10开始做网站了呢，大家很努力，杨晓辉\",\"id\":3,\"author\":\"yang\",\"time\":\"2016-10-11 14:37:54.0\",\"title\":\"一起加油\",\"type\":0,\"pictureurl\":\"http//:www.gto.com\"}","{\"content\":\"就是测试update功能\",\"id\":4,\"author\":\"哥特偶编辑\",\"time\":\"2016-10-13 11:30:51.0\",\"title\":\"今天是个好日子\",\"type\":6,\"pictureurl\":\"http/:www.GTO.com\"}","{\"content\":\"content\",\"id\":5,\"author\":\"author\",\"time\":\"2016-10-17 15:21:30.0\",\"title\":\"title\",\"type\":1,\"pictureurl\":\"pictureurl\"}","{\"content\":\"\\\"2\\\"\",\"id\":6,\"author\":\"\\\"1\\\"\",\"time\":\"2016-10-18 15:37:20.0\",\"title\":\"\\\"4\\\"\",\"type\":1,\"pictureurl\":\"\\\"5\\\"\"}","{\"content\":\"2\",\"id\":7,\"author\":\"1\",\"time\":\"2016-10-18 15:39:20.0\",\"title\":\"4\",\"type\":1,\"pictureurl\":\"5\"}"]}
2、jsonObj的数据：
[object Object]
3、jsonObj.newslist[0])的数据也是正常的啊：
{"content":"2016.10.10开始做网站了呢","id":1,"author":"zhao","time":"2016-10-11 14:37:54.0","title":"开始做网站","type":0,"pictureurl":"http//:www.gto.com"}
3、jsonObj.newslist[0]).content的数据：
显示时undefined 这就是问题所在了
4、只要一步就可以解决了
JSON.parse(jsonObj.newslist[0]).content