springboot validation 使用示例

悠悠 2023-02-25 11:20 1阅读 0赞

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### springboot validation 使用示例 ###

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**示例：对参数pojo进行检验**

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**pojo 层**

**Order**

@Data
    public class Order {
    
        @FutureOrPresent(message = "时间不能为过去时间")
        @DateTimeFormat(pattern = "yyyy-MM-dd HH:mm:ss")
        private LocalDateTime orderTime;
    
        @DecimalMin(value = "0.01",message = "最小值为0.01")
        private Double price;
    
        @Min(value = 1,message = "最小值为1")
        private Integer amount;
    }

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**controller 层**

**HelloController**

@RestController
    public class HelloController {
    
        @RequestMapping("/hello")
        public String hello(@Validated Order order,BindingResult result){
            System.out.println(order);
    
            if (result.hasFieldErrors()){
                result.getFieldErrors().forEach(error -> {
                    System.out.print("field："+error.getField());
                    System.out.println(" ==> defaultMessage："+error.getDefaultMessage());
                });
            }
    
            return "success";
        }
    }

**说明：需要在参数前加注解表示需要对参数验证，如不加注解则不验证**

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**使用测试**

**localhost:8080/hello?orderTime=2021-07-11 20:20:20&amount=10&price=10**

2020-07-13 17:54:01.543  INFO 1284 --- [nio-8080-exec-3] o.s.web.servlet.DispatcherServlet        : Initializing Servlet 'dispatcherServlet'
    2020-07-13 17:54:01.553  INFO 1284 --- [nio-8080-exec-3] o.s.web.servlet.DispatcherServlet        : Completed initialization in 10 ms
    Order(orderTime=2021-07-11T20:20:20, price=10.0, amount=10)

**localhost:8080/hello?orderTime=2020-01-10 20:20:20&amount=10&price=0**

2020-07-13 18:03:06.877  INFO 1048 --- [nio-8080-exec-2] o.s.web.servlet.DispatcherServlet        : Initializing Servlet 'dispatcherServlet'
    2020-07-13 18:03:06.888  INFO 1048 --- [nio-8080-exec-2] o.s.web.servlet.DispatcherServlet        : Completed initialization in 11 ms
    Order(orderTime=2020-01-10T20:20:20, price=0.0, amount=10)
    field：price ==> defaultMessage：最小值为0.01
    field：orderTime ==> defaultMessage：时间不能为过去时间

**说明：验证错误信息存储在bindingResult中，仍可正常返回 success**

**如果不设置bindingResult，则需要自定义异常处理**