springboot 日期、数字格式化器

灰太狼 2023-02-25 08:54 2阅读 0赞

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### springboot 日期、数字格式化器 ###

**应用：将指定格式的日期、数字字符串转换为日期、数字**

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**相关注解**

**@DateTimeFormat：将指定格式的字符串转换为日期**

@Documented
    @Retention(RetentionPolicy.RUNTIME)
    @Target({ElementType.METHOD, ElementType.FIELD, ElementType.PARAMETER, ElementType.ANNOTATION_TYPE})
    public @interface DateTimeFormat {
    
    	String style() default "SS";
    	ISO iso() default ISO.NONE;
    	String pattern() default "";
    
    
    	enum ISO {
    		DATE, TIME, DATE_TIME, NONE
    	}
    
    }

**@NumberFormat：将指定格式的字符串转换为数字**

@Documented
    @Retention(RetentionPolicy.RUNTIME)
    @Target({ElementType.METHOD, ElementType.FIELD, ElementType.PARAMETER, ElementType.ANNOTATION_TYPE})
    public @interface NumberFormat {
    
    	Style style() default Style.DEFAULT;
    	String pattern() default "";
    
    	enum Style {
    		DEFAULT, NUMBER, PERCENT, CURRENCY
    	}
    
    }

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**示例**

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**pojo 层**

**Order**

@Data
    public class Order {
    
        @DateTimeFormat(pattern = "yyyy-MM-dd HH:mm:ss")
        private LocalDateTime orderTime;
    
        @NumberFormat(pattern = "￥ ##,###.00")
        private BigDecimal amount;
    }

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**controller 层**

**HelloController**

@RestController
    public class HelloController {
    
        @RequestMapping("/hello")
        public String hello(Order order){
            System.out.println("orderTime："+order.getOrderTime());
            System.out.println("amount："+order.getAmount());
    
            return "success";
        }
    
        @RequestMapping("/hello2")
        public String hello2(@DateTimeFormat(pattern = "yyyy-MM-dd HH:mm:ss") LocalDateTime orderTime,
                             @NumberFormat(pattern = "￥ ##,###.00") BigDecimal amount){
            System.out.println("orderTime："+orderTime);
            System.out.println("amount："+amount);
    
            return "success";
        }
    }

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**使用测试**

**localhost:8080/hello?orderTime=2020-07-12 01:01:01&amount=￥ 232.121**

2020-07-12 09:48:13.688  INFO 2456 --- [nio-8080-exec-2] o.s.web.servlet.DispatcherServlet        : Initializing Servlet 'dispatcherServlet'
    2020-07-12 09:48:13.697  INFO 2456 --- [nio-8080-exec-2] o.s.web.servlet.DispatcherServlet        : Completed initialization in 8 ms
    orderTime：2020-07-12T01:01:01
    amount：232.121

**localhost:8080/hello2?orderTime=2020-06-12 09:12:34&amount=￥ 232.132**

orderTime：2020-06-12T09:12:34
    amount：232.132