jackson 序列化 忽略为空的字段

[苗哥哥]

package com.winston.test.json;

import com.fasterxml.jackson.annotation.JsonInclude;
import com.fasterxml.jackson.core.JsonProcessingException;
import com.fasterxml.jackson.databind.ObjectMapper;

/**
 * @Description:
 * @Author Winston
 * @Version 1.0 2017/4/25 15:29
 */
public class JackSonTest {
    public static void main(String[] args) {

        ObjectMapper objectMapper = new ObjectMapper();
        try {
            Student student = new Student();
            student.setName("小明");
            student.setAddress("");
            //过滤为null的属性、如上面的student中对address设为“” 此处任然可以打印出来
            objectMapper.setSerializationInclusion(JsonInclude.Include.NON_NULL);
            System.out.println(objectMapper.getSerializationConfig().getSerializationInclusion()+":"+objectMapper.writeValueAsString(student));
            //过滤为null和“”的属性、如上面的student中对address设为“” 此处不能打印出来
            objectMapper.setSerializationInclusion(JsonInclude.Include.NON_EMPTY);
            System.out.println(objectMapper.getSerializationConfig().getSerializationInclusion()+":"+objectMapper.writeValueAsString(student));
        } catch (JsonProcessingException e) {
            e.printStackTrace();
        }
    }

}


class Student{
    private String name;
    private int age;
    private String eamil;
    private String address;
    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 getEamil() {
        return eamil;
    }

    public void setEamil(String eamil) {
        this.eamil = eamil;
    }

    public String getAddress() {
        return address;
    }

    public void setAddress(String address) {
        this.address = address;
    }
}

输出结果为：
NON_NULL:{"name":"小明","age":0,"address":""}
NON_EMPTY:{"name":"小明","age":0,"address":""}

按照代码里面的注释来说 第二次打印内容应该为NON_EMPTY:{"name":"小明","age":0}

[IOE_X]

objectMapper.setSerializationInclusion(JsonInclude.Include.NON_NULL); 配置下ObjectMapper序列化的参数就行

[little_how]

你的空串不是空，你应该不设置address，或者student.setAddress(null);