可能是在您的情况下，您正在反序列化请求，并且构造函数引用的缺少的原语属性被分配了一个默认值
java默认值
您可以尝试为mydto使用相应的长 Package 对象，而不是原语，或者为原语使用反序列化功能fail\u on \u null\u

必须将类型从primitive更改为wrapper，否则将考虑默认值0，验证将通过。
用注解mydto @Valid 注解。
当spring boot发现一个带有@valid注解的参数时，它会自动引导默认的jsr 380实现hibernate validator并验证该参数。
从这里开始
请将以下依赖项添加到pom.xml

<dependency>
    <groupId>org.springframework.boot</groupId>
    <artifactId>spring-boot-starter-validation</artifactId>
</dependency>

附言：我对回应结构做了一些小的调整，看看回应中的错误
整个代码如下：

package com.example.spring.java.springjavasamples;

import com.fasterxml.jackson.annotation.JsonProperty;
import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
import org.springframework.http.HttpStatus;
import org.springframework.http.ResponseEntity;
import org.springframework.stereotype.Service;
import org.springframework.validation.BindingResult;
import org.springframework.validation.FieldError;
import org.springframework.web.bind.annotation.PostMapping;
import org.springframework.web.bind.annotation.RequestBody;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RestController;

import javax.validation.Valid;
import javax.validation.constraints.NotNull;
import java.util.HashMap;
import java.util.Map;

@SpringBootApplication
public class SpringJavaSamplesApplication {

    public static void main(String[] args) {
        SpringApplication.run(SpringJavaSamplesApplication.class, args);
    }

}

@RestController
@RequestMapping(value = "/master")
class MyController {

    private final MyService service;

    public MyController(MyService service) {
        this.service = service;
    }

    @PostMapping("/call")
    public ResponseEntity<Map<String, Object>> apiCall(@Valid @RequestBody MyDTO myDto, BindingResult bindingResult) {
        if (bindingResult.hasErrors()) {
            Map<String, String> errors = new HashMap<>();
            bindingResult.getAllErrors().forEach((error) -> {
                String fieldName = ((FieldError) error).getField();
                String errorMessage = error.getDefaultMessage();
                errors.put(fieldName, errorMessage);
            });
            return prepareResponse("error", errors, HttpStatus.BAD_REQUEST);
        } else {
            return prepareResponse("data", service.apiCall(myDto), HttpStatus.OK);
        }
    }

    private ResponseEntity<Map<String, Object>> prepareResponse(String key, Object data, HttpStatus status) {
        Map<String, Object> map = new HashMap<>();
        map.put(key, data);
        return new ResponseEntity<>(map, status);
    }

}

class MyDTO {

    @NotNull(message = "Employee number cannot be null")
    @JsonProperty("emp_number")
    private Long empNumber;

    @NotNull(message = "Office Id cannot be null")
    @JsonProperty("office_id")
    private Long officeId;

    @Override
    public String toString() {
        return "MyDTO{" +
                "empNumber=" + empNumber +
                ", officeId=" + officeId +
                '}';
    }
}

@Service
class MyService {

    public String apiCall(MyDTO myDto) {
        System.out.println("all valid: " + myDto);
        return myDto.toString();
    }
}