关于@JSONField和@JsonFormat的使用区别说明

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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
 */
@Data
public 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;
}

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/**
     * @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());
    }

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/**
     * 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;

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@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
        List<Task> tasks = 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();
        } 
    }

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@JSONField(format = "yyyy-MM-dd")

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@DateTimeFormat(pattern="yyyy-MM-dd")

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@JsonFormat(pattern = "yyyy-MM-dd HH:mm:ss", timezone = "GMT+8")

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@JsonFormat(pattern = "yyyy-MM-dd HH:mm:ss", timezone = "GMT+8")

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@JsonFormat(pattern = "yyyy-MM-dd HH:mm:ss", timezone = "GMT+8")

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@DateTimeFormat(pattern = "yyyy-MM-dd HH:mm:ss")

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SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");

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@DateTimeFormat(pattern = "yyyy-MM-dd")

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Mon Apr 01 00:00:00 CST 2019

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@DateTimeFormat(pattern = "yyyy-MM-dd HH:mm:ss")