java - Jackson 中的 @XmlPath 模拟是什么？

Question

使用org.eclipse.persistence.oxm.annotations.XmlPath可以read相同的元素放入不同的类字段中。有 jackson 的模拟注释吗？

Answer 1

模拟是 Elastic Path's JSON Unmarshaller

鉴于有关 XmlPath 的问题中的示例，我创建了以下示例:

输入Json

{ "response": 
  { "employee": [ 
    {"name":"Sharique"}, 
    {"name":24}, 
    {"name":"India"}
  ]}
}

目标 POJO:

public class Employee
{
    @JsonPath("$.response.employee[0].name")
    private String empName;
    @JsonPath("$.response.employee[1].name")
    private int age;
    @JsonPath("$.response.employee[2].name")
    private String country;

    public String getEmpName() { return empName; }
    public void   setEmpName(String empName) { this.empName = empName; }
    public int    getAge() { return age; }
    public void   setAge(int age) { this.age = age; }
    public String getCountry() { return country; }
    public void   setCountry(String country) { this.country = country; }
}

调用:

public static void main(String[] args)
{
    String json = "{ \"response\": { \"employee\": [ {\"name\":\"Sharique\"}, {\"name\":24}, {\"name\":\"India\"}] }}";

    try {
        JsonUnmarshaller unmarshaller = new DefaultJsonUnmarshaller();
        Employee emp = unmarshaller.unmarshal(Employee.class, json);
        System.out.println(emp.getEmpName() + " " + emp.getAge() + " " + emp.getCountry());
    } catch (Exception e) {
        e.printStackTrace();
    }

输出:

Sharique 24 India