convert list of lists to json object in java

Question

I have table employee which has the columns EMPID , EMPNAME , EMPAGE , SALARY , ADDRESS , department_id (foreign key to department_id in department) and another table department which has department_id , name . So I made a query

List<Department> deps = sessionFactory.getCurrentSession().createCriteria(Department.class).list(); 

The return vlaue is a List of Lists

I want to put the result in in JSON Object. How can I achieve this?

Answer 1

Do something like this

    List<List<Object>> listOfLists = new ArrayList<>();
    JSONArray jsonArray = new JSONArray();
        for (List<Object> list : listOfLists) {
        JSONArray newArray = new JSONArray(list);
        jsonArray.put(newArray);
    }

Answer 2

如果您使用的是 Spring，那么只需在您的 REST @RequestMapping添加produces ={"application/json"}并休息 Spring 将为您做的事情