项目框架：spring+springMVC+mybatis
@JsonInclude(Include.NON_NULL)的作用：jackson 实体转json 为NULL的字段不参加序列化（即不显示）
实体类：
package com.baidu.entity;import com.fasterxml.jackson.annotation.JsonIgnore;import com.fasterxml.jackson.annotation.JsonInclude;import org.springframework.data.annotation.Transient;import java.io.Serializable;public class User implements Serializable{ ???private static final long serialVersionUID = 8121761080892505330L; ???private String username; ???/*@Transient ???@JsonIgnore*/ ???@JsonInclude(JsonInclude.Include.NON_NULL) ???private String password; //transient ???public String getUsername() { ???????return username; ???} ???public void setUsername(String username) { ???????this.username = username; ???} ???public String getPassword() { ???????return password; ???} ???public void setPassword(String password) { ???????this.password = password; ???}}后台返回结果：
页面返回结果：
从图片上可以看出后台返回的实体在转化为json时，字段值为null的字段不显示。
@JsonInclude(Include.NON_NULL)
原文地址：https://www.cnblogs.com/super-chao/p/8484490.html