如何以 Json 格式显示包含员工和多个地址的地图

Question

我创建了两个类 Employee 和 Address 并且对于每个员工都会有多个地址。我想以 JSON 格式显示这些地址。我在下面尝试了一些代码。您能告诉我如何更改代码以按以下格式显示地图值吗？同样，我想显示 ID 为 2 的员工。{ id: 1 name: John Addresses: [  {   addrLine1:StreetABC Line 1   addrLine2: StreetABC Line 2   city:CityABC   zip: ZipABC  },  {   addrLine1:StreetXYZ Line 1   addrLine2: StreetXYZ Line 2   city:CityXYZ   zip: ZipXYZ  } ]}这是Test.class;import java.util.*;import com.fasterxml.jackson.core.type.TypeReference;import com.fasterxml.jackson.databind.ObjectMapper;import org.json.JSONObject;public class Test {    public static void main(String args[]) {        ObjectMapper mapper = new ObjectMapper();        Employee e1= new Employee(1,"John");        Employee e2= new Employee(2,"Robert");        Address a1 = new Address ("StreetABC Line 1","StreetABC Line 2", "CityABC","ZipABC");        Address a2 = new Address ("StreetXYZ Line 1","StreetXYZ Line 2", "CityXYZ","ZipXYZ");        Address a3 = new Address ("StreetLMN Line 1","StreetLMN Line 2", "CityLMN","ZipLMN");        Address a4 = new Address ("StreetJQK Line 1","StreetJQK Line 2", "CityJQK","ZipJQK");        List<Address> address1=new ArrayList<Address>();        List<Address> address2=new ArrayList<Address>();        List<Employee> employees = new ArrayList<Employee>();        employees.add(e1);        employees.add(e2);        address1.add(a1);        address1.add(a2);        address2.add(a3);        address2.add(a4);        Map<Employee, List<Address>> employeeAddressmap=new HashMap<Employee, List<Address>>();        employeeAddressmap.put(e1,address1);        employeeAddressmap.put(e2,address2);        try {            mapper.writeValueAsString(employeeAddressmap);        } catch (Exception e) {            e.printStackTrace();        }    }}Employee.class 喜欢 ;class Employee{    private int id;    private String name;    public Employee(int id, String name) {        this.id = id;        this.name = name;    }    public void setId(int id){        this.id=id;    }