json中一个对象里面有两个数组为什么数组最后是null?
话不多说直接上代码
然后一运行报错Exception in thread "main" java.lang.NullPointerException at per.swwfourteen.fourteen.JsonRoot.main(JsonRoot.java:12)调试发现在运行时Root_List root=JSONObject.parseObject(ReadRoot("D:"+File.separator+"1.json"),Root_List.class);其中student和teacher的值都是null,很是不
{
"Root": {
"student": [
{
"id": "001",
"name": "student1",
"password": "123",
"age": "20"
},
{
"id": "002",
"name": "student2",
"password": "456",
"age": "21"
},
{
"id": "003",
"name": "student3",
"password": "123",
"age": "21"
}
],
"teacher": [
{
"id": "001",
"name": "teacher1",
"password": "123",
"age": "20",
"car": { "num": "098" }
},
{
"id": "002",
"name": "teacher2",
"password": "123",
"age": "20",
"car": { "num": "098" }
}
]
}
}
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IT从业package ; import java.util.List; public class Root { private List student ; private List teacher ; public void setStudent(List student){ this.student = student; } public List getStudent(){ return this.student; } public void setTeacher(List teacher){ this.teacher = teacher; } public List getTeacher(){ return this.teacher; } }你要自己去试试，capy的时候，集合类型会消失http://www.bejson.com/json2javapojo/
2019-07-17 19:53:02赞同 展开评论 打赏
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