springboot validation 参数嵌套

绝地灬酷狼 2023-02-26 04:22 2阅读 0赞

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### springboot validation 参数嵌套 ###

**如果需要对嵌套pojo检验，需要在嵌套参数前加@Valid，使嵌套pojo上的验证注解生效**

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**示例**

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**pojo 层**

**Product**

@Data
    public class Product {
    
        @NotNull
        private Integer prodId;
    
        @NotNull
        private String prodName;
    
        @DecimalMin(value = "0.01",message = "价格不能小于0.01")
        private BigDecimal price;
    
        @Min(value = 1,message = "数量不能小于1")
        private Integer amount;
    }

**Order**

@Data
    public class Order {
    
        @NotNull
        private String orderId;
    
        @FutureOrPresent
        @JsonFormat(shape = JsonFormat.Shape.STRING,pattern = "yyyy-MM-dd HH:mm:ss")
        private LocalDateTime orderTime;
    
        @Valid
        @NotNull
        private List<Product> productList;
    }

**productList上加@Valid，使product的验证注解生效**

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**controller 层**

**HelloController**

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

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**使用测试**

**localhost:8080/hello，设置header：Content-Type application/json，设置body：**

![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3dlaXhpbl80MzkzMTYyNQ_size_16_color_FFFFFF_t_70][]

**productList 不加@Valid，控制台输出**

2020-07-14 11:16:44.949  INFO 8972 --- [nio-8080-exec-1] o.s.web.servlet.DispatcherServlet        : Initializing Servlet 'dispatcherServlet'
    2020-07-14 11:16:44.956  INFO 8972 --- [nio-8080-exec-1] o.s.web.servlet.DispatcherServlet        : Completed initialization in 7 ms
    Order(orderId=2, orderTime=2020-09-09T09:08, productList=[Product(prodId=1, prodName=苹果, price=10, amount=1), Product(prodId=2, prodName=香蕉, price=2, amount=0)])

**没有对product进行检验，参数注解失效**

**prductList 加注解，控制台输出**

2020-07-14 11:18:26.195  INFO 17364 --- [nio-8080-exec-1] o.s.web.servlet.DispatcherServlet        : Initializing Servlet 'dispatcherServlet'
    2020-07-14 11:18:26.199  INFO 17364 --- [nio-8080-exec-1] o.s.web.servlet.DispatcherServlet        : Completed initialization in 4 ms
    Order(orderId=2, orderTime=2020-09-09T09:08, productList=[Product(prodId=1, prodName=苹果, price=10, amount=1), Product(prodId=2, prodName=香蕉, price=2, amount=0)])
    field：productList[1].amount ==> message：数量不能小于1

**productList\[1\].amount 报出错误，注解生效**

[watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3dlaXhpbl80MzkzMTYyNQ_size_16_color_FFFFFF_t_70]: /images/20230209/6b210b5478824e4abb872f8bfa11379e.png