fastjson序列化一个java bean,默认是根据fieldName的字母序进行序列化的,你可以通过ordinal指定字段的顺序,这个特性需要1.1.42以上版本。示例如下。

import com.alibaba.fastjson.JSON;
import com.alibaba.fastjson.annotation.JSONField;

/**
 * Created by gary on 16/6/21.
 */
public class FieldSequence {

    @JSONField(ordinal=1,name = "name_1")
    private String name;
    @JSONField(ordinal=2)
    private int age;
    @JSONField(ordinal=3)
    private String gender;

    public FieldSequence(String name,int age,String gender){

        this.name = name;
        this.age = age;
        this.gender = gender;
    }

    public String getName() {
        return name;
    }

    public void setName(String name) {
        this.name = name;
    }

    public int getAge() {
        return age;
    }

    public void setAge(int age) {
        this.age = age;
    }

    public String getGender() {
        return gender;
    }

    public void setGender(String gender) {
        this.gender = gender;
    }

    public static void main(String[] args){

        FieldSequence fieldSequence = new FieldSequence("lily",20,"woman");
        System.out.println(JSON.toJSONString(fieldSequence));
    }

}

 

属性中不使用@JSONField注解输出如下

{"age":20,"gender":"woman","name":"lily"}  //按属性字母顺序排序

 

使用注解后,上面程序输出如下

{"name_1":"lily","age":20,"gender":"woman"}

 

@JSONField注解中可以设置属性顺序,重新设置属性名称,格式等,SerializerFeature(这是个枚举类,里面封装的有很多序列化的格式需求)

posted on 2017-12-19 16:46  毛会懂  阅读(682)  评论(0编辑  收藏  举报