java - POJO 到 JSON 的转换不适用于以 "is"开头的字符串变量

Question

字符串变量 - 下面示例中的“isInitial”未转换为 JSON。是否可以在不修改 EmployeePOJO 类的情况下为 isInitial 变量生成 JSON 结构？

PS: converting the getter method to getIsInitial works.

请找到下面用于生成 JSON 的 POJO 类:

public class EmployeePOJO {
    private String firstName;
    private String lastName;
    private String isInitial;
    private boolean isFirstNameAvailable;
    private boolean hasLastNameAvailable;
    private String hasHouse;


    public String getFirstName() {
        return firstName;
    }

    public void setFirstName(String firstName) {
        this.firstName = firstName;
    }

    public String getLastName() {
        return lastName;
    }

    public void setLastName(String lastName) {
        this.lastName = lastName;
    }

    public String isInitial()
    {
        return this.isInitial;
    }

    public void setInitial(String pInitial)
    {
        this.isInitial = pInitial;
    }

    public String getHasHouse() {
        return hasHouse;
    }

    public void setHasHouse(String hasHouse) {
        this.hasHouse = hasHouse;
    }

    public boolean isFirstNameAvailable() {
        return isFirstNameAvailable;
    }

    public void setFirstNameAvailable(boolean firstNameAvailable) {
        isFirstNameAvailable = firstNameAvailable;
    }

    public boolean isHasLastNameAvailable() {
        return hasLastNameAvailable;
    }

    public void setHasLastNameAvailable(boolean hasLastNameAvailable) {
        this.hasLastNameAvailable = hasLastNameAvailable;
    }
}

POJO转换的主要逻辑如下:

import org.codehaus.jackson.map.ObjectMapper;

import java.io.IOException;

public class JacksonPojoToJson {
    public static void main(String[] args) throws IOException {
        // Create ObjectMapper
        ObjectMapper mapper = new ObjectMapper();

        EmployeePOJO employeePOJO = new EmployeePOJO();
        employeePOJO.setFirstName("FIRST NAME");
        employeePOJO.setFirstNameAvailable(true);
        employeePOJO.setLastName("last name");
        employeePOJO.setHasLastNameAvailable(true);
        employeePOJO.setInitial("true");

        // Convert object to JSON string
        String json = mapper.writeValueAsString(employeePOJO);
        System.out.println(json);
    }
}

Answer 1

错误的命名约定。如果您使用 IDE，请让 IDE 为您生成 getter 和 setter。

isInitial 方法可用作 boolean 变量的 getter。不是字符串变量。

这样你就可以修复你的 POJO 类 ( https://en.wikipedia.org/wiki/Plain_old_Java_object )

或者您可以使用@JsonProperty注释( https://fasterxml.github.io/jackson-annotations/javadoc/2.8/com/fasterxml/jackson/annotation/JsonProperty.html )