Spring @Valid 注释不能用作验证 dto 字段？

Question

我已经检查了很多关于它的其他问题，但我找不到解决方案，我在哪里遗漏了？

控制器方法如下：

package com.nishberkay.nishcustomer.controller;

import com.nishberkay.nishcustomer.dto.request.CustomerAddRequestDto;
import com.nishberkay.nishcustomer.dto.request.CustomerUpdateRequestDto;
import com.nishberkay.nishcustomer.dto.response.CustomerDto;
import com.nishberkay.nishcustomer.entity.mysqlentity.Customer;
import com.nishberkay.nishcustomer.exception.InvalidRequestException;
import com.nishberkay.nishcustomer.service.CustomerService;
import org.modelmapper.ModelMapper;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.validation.BindingResult;
import org.springframework.validation.annotation.Validated;
import org.springframework.web.bind.annotation.*;

import javax.validation.Valid;

@RestController
@RequestMapping("/customer")
@Validated
public class CustomerController {


    private CustomerService customerService;
    private ModelMapper modelMapper;

    @Autowired
    public CustomerController(CustomerService customerService, ModelMapper modelMapper) {
        this.customerService = customerService;
        this.modelMapper = modelMapper;
    }

    @PutMapping
    public CustomerDto updateCustomer(@Valid @RequestBody CustomerUpdateRequestDto customerDto,
                                      BindingResult bindingResult) throws Exception {
        if (bindingResult.hasErrors()) {
            String errorMessage = bindingResult.getAllErrors().get(0).getDefaultMessage();
            throw new InvalidRequestException(errorMessage);
        }
        Customer customer = modelMapper.map(customerDto, Customer.class);
        return modelMapper.map(customerService.update(customer), CustomerDto.class);
    }
}

我的 dto 是：

import javax.validation.constraints.NotNull;

@Data
public class CustomerUpdateRequestDto {

    @NotNull
    private int id;

    @NotNull
    private String firstName;

    @NotNull
    private String lastName;
}

我的问题是（也许@Valid 确实在工作我不确定），当我用邮递员请求调试它时：

{
    "firstName" : "berkayaaasd",
    "lastName" : "dada"
}

我期待某种消息，例如“Id 不能为空”，但是 id field 将以 0 的形式出现，所以这就是为什么我认为也许 @Valid 正在工作，但其他地方出了问题。

这里是 pom 依赖项：

<dependencies>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-web</artifactId>
        </dependency>
        <dependency>
            <groupId>mysql</groupId>
            <artifactId>mysql-connector-java</artifactId>
            <scope>runtime</scope>
        </dependency>
        <dependency>
            <groupId>org.postgresql</groupId>
            <artifactId>postgresql</artifactId>
            <scope>runtime</scope>
        </dependency>
        <dependency>
            <groupId>org.projectlombok</groupId>
            <artifactId>lombok</artifactId>
            <optional>true</optional>
        </dependency>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-test</artifactId>
            <scope>test</scope>
        </dependency>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-validation</artifactId>
        </dependency>
        <dependency>
            <groupId>org.springframework.data</groupId>
            <artifactId>spring-data-jpa</artifactId>
            <version>2.6.1</version>
        </dependency>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-data-jpa</artifactId>
        </dependency>
        <dependency>
            <groupId>org.modelmapper</groupId>
            <artifactId>modelmapper</artifactId>
            <version>2.3.8</version>
        </dependency>
    </dependencies>

Answer 1

这里的问题是您将 id 定义为原始类型，它永远不能为 null。

如果您选择盒装类型（Integer 在这种情况下），这应该有效。

所以在你的 DTO 中：

import javax.validation.constraints.NotNull;

@Data
public class CustomerUpdateRequestDto {
    @NotNull
    private Integer id;
    ...
}

Spring @Valid 注释不能用作验证 dto 字段？

Spring @Valid annotation not working as validating dto fields?

java

spring

spring-boot

validation

spring-restcontroller