Unified verification of java project

We use springa tool spring-boot-starter-validationthat provides us with a good unified verification in the background to verify the request.

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

Several commonly used checks are encapsulated here through annotations

• @NotNull Cannot be null
• @NotEmpty Cannot be null, empty string, empty collection
• @NotBlank Cannot be null, empty string, pure space string
• @Min The minimum value of the number cannot be less than x
• @Max Maximum number cannot be greater than x
• @Email The string is in the mail format
• @Max Maximum number cannot be greater than x
• @Size The minimum string length is x, and the minimum collection length is x
• @Pattern Regular expression

Let’s take SysUseran example and see how to use it

public class SysUser implements Serializable {
    
    
	private static final long serialVersionUID = 1L;
	
	/**
	 * 用户ID
	 *
	 */
	@TableId
	private Long userId;

	/**
	 * 用户名
	 */
	@NotBlank(message="用户名不能为空")
	@Size(min = 2,max = 20,message = "用户名长度要在2-20之间")
	private String username;

	/**
	 * 密码
	 */
	@JsonProperty(access = JsonProperty.Access.WRITE_ONLY)
	private String password;

	/**
	 * 邮箱
	 */
	@NotBlank(message="邮箱不能为空")
	@Email(message="邮箱格式不正确")
	private String email;

	/**
	 * 手机号
	 */
	@Pattern(regexp="0?1[0-9]{10}",message = "请输入正确的手机号")
	private String mobile;

	/**
	 * 状态  0：禁用   1：正常
	 */
	private Integer status;
	
	/**
	 * 用户所在店铺id
	 */
	private Long shopId;
	
	/**
	 * 角色ID列表
	 */
	@TableField(exist=false)
	private List<Long> roleIdList;
	
	/**
	 * 创建时间
	 */
	private Date createTime;

}

We use the bean in the Controller layer and use @Validannotations to make the verification annotations effective, such as SysUserController:

@RestController
@RequestMapping("/sys/user")
public class SysUserController {
    
    
	/**
	 * 保存用户
	 */
	@SysLog("保存用户")
	@PostMapping
	@PreAuthorize("@pms.hasPermission('sys:user:save')")
	public ResponseEntity<String> save(@Valid @RequestBody SysUser user){
    
    
		String username = user.getUsername();
		SysUser dbUser = sysUserService.getOne(new LambdaQueryWrapper<SysUser>()
				.eq(SysUser::getUsername, username));
		if (dbUser!=null) {
    
    
			return ResponseEntity.badRequest().body("该用户已存在");
		}
		user.setShopId(SecurityUtils.getSysUser().getShopId());
		user.setPassword(passwordEncoder.encode(user.getPassword()));
		sysUserService.saveUserAndUserRole(user);
		return ResponseEntity.ok().build();
	}
}

And DefaultExceptionHandlerConfigintercept @Validthe exception information triggered by and return:

@Controller
@RestControllerAdvice
public class DefaultExceptionHandlerConfig {
    
    

    @ExceptionHandler(BindException.class)
    public ResponseEntity<String> bindExceptionHandler(BindException e){
    
    
        e.printStackTrace();
        return ResponseEntity.status(HttpStatus.BAD_REQUEST).body(e.getBindingResult().getFieldErrors().get(0).getDefaultMessage());

    }

    @ExceptionHandler(MethodArgumentNotValidException.class)
    public ResponseEntity<String> methodArgumentNotValidExceptionHandler(MethodArgumentNotValidException e){
    
    
        e.printStackTrace();
        return ResponseEntity.status(HttpStatus.BAD_REQUEST).body(e.getBindingResult().getFieldErrors().get(0).getDefaultMessage());
    }
}