springboot validation 参数嵌套-蒲公英云

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