SpringBoot使用Validation进行参数校验的示例详解

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

import com.fasterxml.jackson.annotation.JsonIgnore;
import lombok.AllArgsConstructor;
import lombok.Data;
import lombok.NoArgsConstructor;
import org.hibernate.validator.constraints.Length;

import javax.validation.constraints.Email;
import javax.validation.constraints.Max;
import javax.validation.constraints.Min;
import javax.validation.constraints.NotBlank;
import java.util.UUID;

@Data
@AllArgsConstructor
@NoArgsConstructor
public class registryUserDto {
    @NotBlank(message = "用户名不能为空")
    private String username;
    @NotBlank(message = "密码不能为空")
    @Length(min = 6, max = 20, message = "密码长度在6-20之间")
    private String password;
    @Min(value = 0, message = "年龄最小为0")
    @Max(value = 200, message = "年龄最大为200")
    private Integer age;
    @NotBlank(message = "邮箱不能为空")
    @Email(message = "邮箱格式不正确")
    private String email;
    @JsonIgnore
    private String salt = UUID.randomUUID().toString().replaceAll("-", "");
    private Boolean admin;
}

@PostMapping("/registry")
public ResponseResult registryUser(@RequestBody @Valid registryUserDto registryUserDto) {
    return ResponseResult.okResult(registryUserDto);
}

@Pattern(regexp = "^1(3|4|5|7|8)\d{9}$",message = "手机号码格式错误")
@NotBlank(message = "手机号码不能为空")
private String phone;

@RestController
@RequestMapping("/user")
@Validated
public class UserController {
    @PostMapping("/registry")
    public ResponseResult registryUser(@NotBlank(message = "name不能为空") String name) {
        return ResponseResult.okResult(name);
    }
}

import com.jk.validator.StatusValidator;

import javax.validation.Constraint;
import javax.validation.Payload;
import java.lang.annotation.*;

@Target({ElementType.FIELD, ElementType.PARAMETER})
@Retention(RetentionPolicy.RUNTIME)
@Documented
@Constraint(validatedBy = {StatusValidator.class})
public @interface Status {

    String[] statusType() default {};

    String message() default "状态传递有误";

    Class<?>[] groups() default {};

    Class<? extends Payload>[] payload() default {};

}

import com.jk.annotation.validator.Status;
import javax.validation.ConstraintValidator;
import javax.validation.ConstraintValidatorContext;
import java.util.Arrays;
import java.util.List;
public class StatusValidator implements ConstraintValidator<Status, Integer> {
    private List<String> typeStatus ;
    @Override
    public void initialize(Status constraintAnnotation) {
        typeStatus = Arrays.asList(constraintAnnotation.statusType());
        ConstraintValidator.super.initialize(constraintAnnotation);
    }
    @Override
    public boolean isValid(Integer value, ConstraintValidatorContext constraintValidatorContext) {
        if(value !=null){
            if(!typeStatus.contains(String.valueOf(value))){
                return false;
            }
        }
        return true;
    }
}

@Status(statusType = {"1", "2"})
private Integer status;

import com.jk.enums.AppHttpCodeEnum;
import com.jk.exception.SystemException;
import com.jk.domain.vo.ResponseResult;
import lombok.extern.slf4j.Slf4j;
import org.springframework.validation.BindException;
import org.springframework.web.bind.annotation.ExceptionHandler;
import org.springframework.web.bind.annotation.RestControllerAdvice;

@RestControllerAdvice
@Slf4j
public class GlobalExceptionHandler {
    @ExceptionHandler(SystemException.class)
    public ResponseResult systemExceptionHandler(SystemException e) {
        log.error("出现了异常! {}", e);
        return ResponseResult.errorResult(e.getCode(), e.getMsg());
    }
    @ExceptionHandler(Exception.class)
    public ResponseResult exceptionHandler(Exception e) {
        log.error("出现了异常! {}", e);
        return ResponseResult.errorResult(AppHttpCodeEnum.SYSTEM_ERROR.getCode(), e.getMessage());
    }
    /* 添加校验参数异常处理 */
    @ExceptionHandler(BindException.class)
    public ResponseResult bindExceptionHandler(BindException e) {
        log.error("出现了异常! {}", e);
        return ResponseResult.errorResult(AppHttpCodeEnum.SYSTEM_ERROR, e.getBindingResult().getAllErrors().get(0).getDefaultMessage());
    }
}