SpringBoot Validation快速实现数据校验的示例代码

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

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

@Data
@ToString
public class DemoEntity {
	
	// 不能为空，比较时会除去空格
    @NotBlank(message = "名称不能为空")
    private String name;
	
	// amount必须是一个大于等于5，小于等于10的数字
    @DecimalMax(value = "10")
    @DecimalMin(value = "5")
    private BigDecimal amount;

	// 必须符合email格式
    @Email
    private String email;
	
	// size长度必须在5到10之间
    @Size(max = 10, min = 5)
    private String size;
	
	// age大小必须在18到35之间
    @Min(value = 18)
    @Max(value = 35)
    private int age;
	
	// user不能为null
    @NotNull
    private User user;
	
	// 限制必须为小数，且整数位integer最多2位，小数位fraction最多为4位
    @Digits(integer = 2, fraction = 4)
    private BigDecimal digits;
	
	// 限制必须为未来的日期
    @Future
    private Date future;

	// 限制必须为过期的日期
    @Past
    private Date past;
	
	// 限制必须是一个未来或现在的时间
    @FutureOrPresent
    private Date futureOrPast;
	
	// 支持正则表达式
	@Pattern(regexp = "^\\d+$")
	private String digit;
}

@RestController
@Slf4j
@RequestMapping("/valid")
public class TestValidController {

    @RequestMapping("/demo1")
    public String demo12(@Validated @RequestBody DemoEntity demoEntity) {
        try {
            return "SUCCESS";
        } catch (Exception e) {
            log.error(e.getMessage(), e);
            return "FAIL";
        }
    }
}

@NotBlank(message = "名称不能为空", groups = A.class)
@Size(max = 10, min = 5, groups = B.class)
private String name;

@RestController
@Slf4j
@RequestMapping("/valid")
public class TestValidController {

    @RequestMapping("/demo1")
    public String demo1(@Validated({A.class}) @RequestBody DemoEntity demoEntity) {
        try {
            return "SUCCESS";
        } catch (Exception e) {
            log.error(e.getMessage(), e);
            return "FAIL";
        }
    }

    @RequestMapping("/demo2")
    public String demo2(@Validated({B.class}) @RequestBody DemoEntity demoEntity) {
        try {
            return "SUCCESS";
        } catch (Exception e) {
            log.error(e.getMessage(), e);
            return "FAIL";
        }
    }
}