@JsonFormat、@DateTimeFormat、@JSONField注解的使用

墨蓝 2022-03-07 11:54 1025阅读 0赞

1.注解@JsonFormat  
1)使用maven引入@JsonFormat所需要的jar包

<dependency>
    	<groupId>com.fasterxml.jackson.core</groupId>
    	<artifactId>jackson-annotations</artifactId>
    	<version>2.8.8</version>
    </dependency>
    <dependency>
    	<groupId>com.fasterxml.jackson.core</groupId>
    	<artifactId>jackson-databind</artifactId>
    	<version>2.8.8</version>
    </dependency>
    <dependency>
    	<groupId>org.codehaus.jackson</groupId>
    	<artifactId>jackson-mapper-asl</artifactId>
    	<version>1.9.13</version>
    </dependency>

2)在实体类的属性上添加@JsonFormat

@Data
    public class DateTest1 {
        @JsonFormat(shape = JsonFormat.Shape.STRING, pattern = "yyyy-MM-dd HH:mm:ss", timezone = "GMT+8")
        private Date date;
        @JsonFormat(shape = JsonFormat.Shape.NUMBER)
        private Date date1;
        @JsonFormat(locale = "zh_CN")
        private Date date2;
    
        public DateTest1(){};
    
        public DateTest1(Date date, Date date1, Date date2) {
            this.date=date;
            this.date1=date1;
            this.date2=date2;
        }
    }

3)对应的controller

@RequestMapping("/testDate1")
        public DateTest1 testDate1(@RequestBody DateTest1 dateTest1) throws JsonProcessingException {
            ObjectMapper objectMapper = new ObjectMapper();
            System.out.println("dateTest1: date="+dateTest1.getDate()+"&date1="+dateTest1.getDate1()+"&date2="+dateTest1.getDate2());
            System.out.println(objectMapper.writeValueAsString(dateTest1));
            return dateTest1;
        }

4)前端请求  
![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L211c2lfbQ_size_16_color_FFFFFF_t_70]  
5)管理台打印的日志  
![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L211c2lfbQ_size_16_color_FFFFFF_t_70 1]

2.注解@DateTimeFormat  
1)引入相关依赖

2)在实体类的属性上添加@DateTimeFormat

@Data
    public class DateTest2{
        @DateTimeFormat(pattern = "yyyy-MM-dd HH:mm:ss")
        private Date date5;
        public DateTest2(){};
    }

3)对应的controller

@RequestMapping("/testDate2")
        public DateTest2 testDate2(@RequestBody DateTest2 dateTest2){
            System.out.println("dateTest2: date="+dateTest2.getDate() );
            return dateTest2;
        }

4)前端请求  
![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L211c2lfbQ_size_16_color_FFFFFF_t_70 2]  
5)管理台打印的日志  
![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L211c2lfbQ_size_16_color_FFFFFF_t_70 3]  
3注解@JSONField  
1)引入相关依赖

<dependency>
        <groupId>com.alibaba</groupId>
        <artifactId>fastjson</artifactId>
        <version>1.1.39</version>
    </dependency>

2)在实体类的属性上添加@JSONField

@Data
    public class DateTest3 {
        @JSONField(name="aaa")
        private String name;
        @JSONField(format="yyyy-MM-dd HH:mm:ss")
        private Date date1;
        
        public DateTest3() {}
        
        public DateTest3(Date date1) {
            this.date1=date1;
        }
        
        public DateTest3(String name, Date date1) {
            this.name=name;
            this.date1=date1;
        }
    }

3)对应的controller

@RequestMapping("/testDate3")
        public DateTest3 testDate3(@RequestBody DateTest3 dateTest3){
            System.out.println("dateTest3: name="+dateTest3.getName()+"&date1="+dateTest3.getDate1());
            System.out.println(JSONObject.toJSONString(dateTest3));
            return dateTest3;
        }

4)前端请求  
![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L211c2lfbQ_size_16_color_FFFFFF_t_70 4]  
5)管理台打印的日志  
![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L211c2lfbQ_size_16_color_FFFFFF_t_70 5]

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