Question

使用JQuery插件DataTables，报错：Uncaught TypeError: Cannot read property 'length' of undefined

使用JQuery插件DataTables，报错：Uncaught TypeError: Cannot read property 'length' of undefined后台返回的 JSON 数据格式没问题，用浏览器 network 查看网络请求也成功了。后台使用的是 Java springMVC+myBatis。以下是返回的 JSON 数据：{"code":"200","data":[{"lastLoginTime":"2018-01-13 18:10:01.0","gender":"man","registerTime":"2018-01-13 18:10:01.0","nickName":"雨田三石","icon":"/default/man.jpg","authType":2,"userId":1,"account":"17396486424"},{"lastLoginTime":"2018-01-13 18:10:01.0","gender":"man","registerTime":"2018-01-13 18:10:01.0","nickName":"黑策策","icon":"/default/man.jpg","authType":1,"userId":2,"account":"17070882754"},{"lastLoginTime":"2018-01-13 18:10:01.0","gender":"man","registerTime":"2018-01-13 18:10:01.0","nickName":"凉岛","icon":"/default/man.jpg","authType":2,"userId":3,"account":"17717489245"},{"lastLoginTime":"2018-01-13 18:10:02.0","gender":"woman","registerTime":"2018-01-13 18:10:02.0","nickName":"陆颗","icon":"/default/woman.jpg","authType":2,"userId":4,"account":"17252643120"},{"lastLoginTime":"2018-01-13 18:10:02.0","gender":"woman","registerTime":"2018-01-13 18:10:02.0","nickName":"沫汨","icon":"/default/woman.jpg","authType":2,"userId":5,"account":"18691745414"},{"lastLoginTime":"2018-01-13 18:10:02.0","gender":"man","registerTime":"2018-01-13 18:10:02.0","nickName":"狐狸飞","icon":"/default/man.jpg","authType":2,"userId":6,"account":"13174552044"},{"lastLoginTime":"2018-01-13 18:10:03.0","gender":"man","registerTime":"2018-01-13 18:10:03.0","nickName":"何文通","icon":"/default/man.jpg","authType":2,"userId":7,"account":"17250880927"},{"lastLoginTime":"2018-01-13 18:10:03.0","gender":"man","registerTime":"2018-01-13 18:10:03.0","nickName":"布林","icon":"/default/man.jpg","authType":2,"userId":8,"account":"17289452078"},{"lastLoginTime":"2018-01-13 18:10:04.0","gender":"woman","registerTime":"2018-01-13 18:10:04.0","nickName":"多肉星人","icon":"/default/woman.jpg","authType":2,"userId":9,"account":"13540770412"},{"lastLoginTime":"2018-01-13 18:10:05.0","gender":"woman","registerTime":"2018-01-13 18:10:05.0","nickName":"王安静","icon":"/default/woman.jpg","authType":2,"userId":10,"account":"18992210467"}],"msg":"获取用户列表成功!"}

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Answer 1

目测是因为分页参数问题，如果不是请忽略
没开分页可以直接传集合转化为json，开分页一般需要{total:100,rows={ ｛｝，｛｝ }}这种形式，jq读取rows为空，找不到rows.length属性就会报这种错；
具体的可以参看一下帮助文档有没有类似的说明，