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@JSONField是阿里巴巴下fastjson下的,@JsonFormat是jackson下面的。
一、@JSONField的常用方式:
1.1、name的用法:
实体类:
package com.xiaobu.entity;import com.alibaba.fastjson.annotation.JSONField;import lombok.Data;import javax.persistence.*;import java.io.Serializable;/** * @author xiaobu * @version JDK1.8.0_171 * @date on 2018/12/4 19:00 * @description V1.0 */@Datapublic class Roles implements Serializable { private static final long serialVersionUID = 5775171105018867238L; @JSONField(name = "role_id") @Column(name = "RoleId") private Integer RoleId; @JSONField(name = "role_desc") @Column(name = "RoleDesc") private String RoleDesc;}
测试类:
/** * @author xiaobu * @date 2018/12/5 16:53 * @descprition 表明 json不区分大小写都能转换 * @version 1.0 * bean to JSON:{"role_desc":"admin","role_id":8} * 需要转换的json:{"ROLE_DESC":"ADMIN","ROLE_ID":8} * RoleDesc:ADMIN */ @Test public void testJSONField(){ Roles roles = new Roles(); roles.setRoleDesc("admin"); roles.setRoleId(8); String jsonStr=JSONObject.toJSONString(roles); System.out.println("bean to JSON:"+jsonStr); //改变json的key为大写 jsonStr = jsonStr.toUpperCase(); System.out.println("需要转换的json:" + jsonStr); roles = JSONObject.toJavaObject(JSONObject.parseObject(jsonStr), Roles.class); System.out.println("RoleDesc:"+roles.getRoleDesc()); }
1.2 format的用法:
实体类:
/** * 任务接收时间 */ @JsonFormat(pattern = "yyyy-MM-dd",timezone = "GMT+8") @JSONField(format = "yyyy-MM-dd") @Column(name="TaskAcceptTime") private Date TaskAcceptTime; /** *任务完成时间 */ @JsonFormat(pattern = "yyyy-MM-dd HH:mm:ss",timezone = "GMT+8") @JSONField(format = "yyyy-MM-dd") @Column(name="TaskCompleteTime") private Date TaskCompleteTime;
测试类:
@Test public void findByExample() { Task task = new Task(); task.setTaskId("HYR08274-0804"); Example example = new Example(Task.class); Example.Criteria criteria = example.createCriteria(); if (StringUtils.isNotBlank(task.getTaskId())) { criteria.andLike("TaskId", "%" + task.getTaskId() + "%"); } //TaskAcceptTime=Mon Aug 04 00:00:00 CST 2008,TaskCompleteTime=Fri Nov 07 00:00:00 CST 2008 Listtasks = taskMapper.selectByExample(example); System.out.println(tasks); //""taskAcceptTime":"2008-08-04","taskCompleteTime":"2008-11-07" String fastJsonStr = JSON.toJSONString(tasks); System.out.println("fastJsonStr = " + fastJsonStr); ObjectMapper MAPPER = new ObjectMapper(); try { //""TaskAcceptTime":"2008-08-04","TaskCompleteTime":"2008-11-07 00:00:00" String ujosn = MAPPER.writeValueAsString(tasks); System.out.println("ujosn = " + ujosn); } catch (JsonProcessingException e) { e.printStackTrace(); } }
@JsonFormat(pattern = "yyyy-MM-dd",timezone = "GMT+8") 必须加上时区。
@JSONField(format = "yyyy-MM-dd")
这两个的作用都是格式化日期时间。且只能作用在日期时间上。
补充: 前台传后台
@DateTimeFormat(pattern="yyyy-MM-dd")转载地址:http://nygai.baihongyu.com/