jsonarray用法，json的4种解析方式

{    "key":"value",    "simpleArray":[        1,        2,        3    ],    "arrays":[        {            "arrInnerClsKey":"arrInnerClsValue",            "arrInnerClsKeyNub":1        }    ],    "innerclass":{        "name":"Musk",        "age":50,        "sex":"男"    }}

public class JsonJavaBean {    private String key;    private List<Integer> simpleArray;    private List<ArraysBean> arrays;    private InnerclassBean innerclass;    public String getKey() {        return key;    }    public void setKey(String key) {        this.key = key;    }    public List<Integer> getSimpleArray() {        return simpleArray;    }    public void setSimpleArray(List<Integer> simpleArray) {        this.simpleArray = simpleArray;    }    public List<ArraysBean> getArrays() {        return arrays;    }    public void setArrays(List<ArraysBean> arrays) {        this.arrays = arrays;    }    public InnerclassBean getInnerclass() {        return innerclass;    }    public void setInnerclass(InnerclassBean innerclass) {        this.innerclass = innerclass;    }    private static class ArraysBean {        private String arrInnerClsKey;        private int arrInnerClsKeyNub;        public String getArrInnerClsKey() {            return arrInnerClsKey;        }        public void setArrInnerClsKey(String arrInnerClsKey) {            this.arrInnerClsKey = arrInnerClsKey;        }        public int getArrInnerClsKeyNub() {            return arrInnerClsKeyNub;        }        public void setArrInnerClsKeyNub(int arrInnerClsKeyNub) {            this.arrInnerClsKeyNub = arrInnerClsKeyNub;        }    }    private static class InnerclassBean {        private String name;        private int age;        private String sex;        public String getName() {            return name;        }        public void setName(String name) {            this.name = name;        }        public int getAge() {            return age;        }        public void setAge(int age) {            this.age = age;        }        public String getSex() {            return sex;        }        public void setSex(String sex) {            this.sex = sex;        }    }}

public class GsonUse {    public static void main(String[] args) throws Exception {        Student student = new Student();        student.setName("John");        student.setAge(20);        student.setSex("男");        List<Course> courses = new ArrayList<>();        courses.add(new Course("语文", 99));        courses.add(new Course("地理", 59));        student.setCourses(courses);        Gson gson = new Gson();        //在项目根目录下的json文件夹下生成Jgsonjson.json文件        File file = new File("json/gsonjson.json");        FileOutputStream fos = new FileOutputStream(file);        OutputStreamWriter osw = new OutputStreamWriter(fos, "utf-8");        JsonWriter jw = new JsonWriter(osw);        gson.toJson(student, new TypeToken<Student>() {        }.getType(), jw);        jw.flush();        jw.close();        //反序列化为JavaBean        FileInputStream fis = new FileInputStream(file);        InputStreamReader isr = new InputStreamReader(fis);        JsonReader jr = new JsonReader(isr);        Student student1 = gson.fromJson(jr, new TypeToken<Student>() {        }.getType());        System.out.println(student1);    }}

//Jacksonimplementation 'com.fasterxml.jackson.core:jackson-databind:2.13.1'implementation 'com.fasterxml.jackson.core:jackson-core:2.13.1'implementation 'com.fasterxml.jackson.core:jackson-annotations:2.13.1'

public class JacksonUse {    public static void main(String[] args) throws Exception {        Student student = new Student();        student.setName("HongKong Doll");        student.setSex("女");        student.setAge(26);        List<Course> courses = new ArrayList<>();        courses.add(new Course("Art", 100));        courses.add(new Course("Love", 99));        student.setCourses(courses);        ObjectMapper objectMapper = new ObjectMapper();        //序列化 生成json文件        File file = new File("json/jacksonjson.json");        FileOutputStream fos = new FileOutputStream(file);        objectMapper.writeValue(fos, student);        //反序列化 json文件转为JavaBean        Student student1 = objectMapper.readValue(file, Student.class);        System.out.println(student1);    }}

Exception in thread "main" com.fasterxml.jackson.databind.exc.UnrecognizedPropertyException: Unrecognized field "hobby" (class site.exciter.learn.json.Student), not marked as ignorable (4 known properties: "courses", "name", "sex", "age"]) at [Source: (File); line: 3, column: 13] (through reference chain: site.exciter.learn.json.Student["hobby"])