java - How to exclude in JSON property of an object (inside output class)? -


let's have piece of code output class used json:

studentsummary.java  public class studentsummary {  studentlist studentlist;  //getters setters }

and studentlist

studentlist.java public class studentlist {  int numberofstudents; int totalexpenditures; list<student> students;  //getters setters }

after making service call, json output:

{   "studentsummary": {      "studentlist": {      "numberofstudents": 500      "totalexpenditures": 250000      "students": [ {         //students listed     }   ]  } }

what want do, exclude json students list in studentsummary output class, looks this:

{   "studentsummary": {      "studentlist": {      "numberofstudents": 500      "totalexpenditures": 250000          } }

i've tried using (in studentsummary output class) @jsonignore , @jsonproperties , specifying exclude "studentlist.students", doesn't anything.

edit: further clarification, why couldn't changes inside studentlist class, it's because used service , service studentsummary class of different service, can make changes inside latter class, without modifying previous service.

summary

this solve problem:

public class studentsummary {      @jsonignoreproperties(value = { "students" })     public studentlist studentlist = new studentlist();

you not need edit studentlist class.

all test class definitions

student

public class student {      string name = "student" + math.random()*100;      public string getname() {         return name;     }      public void setname(string name) {         this.name = name;     } }

studentlist

public class studentlist {      int numberofstudents;     int totalexpenditures;     list<student> students = new arraylist<>();      public studentlist(){         for(int =0; i<10; i++){             students.add(new student());         }     }      public int getnumberofstudents() {         return numberofstudents;     }      public void setnumberofstudents(int numberofstudents) {         this.numberofstudents = numberofstudents;     }      public int gettotalexpenditures() {         return totalexpenditures;     }      public void settotalexpenditures(int totalexpenditures) {         this.totalexpenditures = totalexpenditures;     }      public list<student> getstudents() {         return students;     }      public void setstudents(list<student> students) {         this.students = students;     }      //getters setters }

studentsummary

public class studentsummary {      @jsonignoreproperties(value = { "students" })     public studentlist studentlist = new studentlist();      public studentsummary(){         studentlist = new studentlist();     }      public studentlist getstudentlist() {         return studentlist;     }      public void setstudentlist(studentlist studentlist) {         this.studentlist = studentlist;     }      //getters setters }

main class

objectmapper mapper = new objectmapper();  studentsummary summary = new studentsummary(); string test = mapper.writevalueasstring(summary); system.out.println(test); system.out.print("done");

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