普通Java项目使用Hibernate Validator进行数据校验参数校验 校验Bean

背景#

最近有负责维护一个专门做对外数据接口的项目，由于接口数据需要加密，而且解密后的数据需要校验，手动ifelse判断非常繁琐，因此想使用hibernate validator在数据解密后手动进行校验。

依赖#

需要使用以下几个依赖，这里我是用的是maven，如果没有使用maven可以手动下载jar包引入。

需要注意的一点是，如果你使用的是Jdk8，hibernate-validator不要使用7以上的版本。
以及，在某些情况下可能需要引入jboss-logging包(如果报错)

<dependency>
    <groupId>org.projectlombok</groupId>
    <artifactId>lombok</artifactId>
    <version>1.18.18</version>
</dependency>
<!-- https://mvnrepository.com/artifact/org.hibernate.validator/hibernate-validator -->
<dependency>
    <groupId>org.hibernate.validator</groupId>
    <artifactId>hibernate-validator</artifactId>
    <version>6.2.0.Final</version>
</dependency>
<!-- https://mvnrepository.com/artifact/javax.validation/validation-api -->
<dependency>
    <groupId>javax.validation</groupId>
    <artifactId>validation-api</artifactId>
    <version>2.0.1.Final</version>
</dependency>
<!-- https://mvnrepository.com/artifact/com.fasterxml/classmate -->
<dependency>
    <groupId>com.fasterxml</groupId>
    <artifactId>classmate</artifactId>
    <version>1.5.1</version>
</dependency>
<!-- https://mvnrepository.com/artifact/javax.el/javax.el-api -->
<dependency>
    <groupId>javax.el</groupId>
    <artifactId>javax.el-api</artifactId>
    <version>3.0.0</version>
</dependency>
<!-- https://mvnrepository.com/artifact/org.glassfish.web/el-impl -->
<dependency>
    <groupId>org.glassfish.web</groupId>
    <artifactId>el-impl</artifactId>
    <version>2.2</version>
</dependency>

实体类添加注解校验#

如果需要对嵌套的实体类也进行校验，需要在属性上加上@Valid注解，比如下面的equipments

@Data
@Accessors(chain = true)
public class Gamer {
    @NotBlank(message = "角色名称不能为空")
    private String name;
    @Range(min = 0, max = 1, message = "性别只能是0或1")
    private Integer sex;
    @Min(value = 1, message = "攻击力最低为1")
    private Integer attack;
    @Min(value = 1, message = "防御力最低为1")
    private Integer defense;
    @Valid
    @Size(min = 1, message = "装备列表不能空")
    private List<Equipment> equipments = new ArrayList<>();
}

@Data
@Accessors(chain = true)
public class Equipment {
    @NotBlank(message = "装备名称不能为空")
    private String name;
    @NotNull(message = "装备类型不能为空")
    private Integer equipmentType;
}

编写校验工具类#

public class ValidationUtil {

    // 如果只需要返回第一个校验失败的信息，需要将下面的failFast设置为true
    private static Validator validator = Validation
            .byProvider(HibernateValidator.class)
            .configure()
            .failFast(false)
            .buildValidatorFactory()
            .getValidator();

    public static <T> void validate(T bean) {
        Set<ConstraintViolation<T>> validate = validator.validate(bean);
        Iterator<ConstraintViolation<T>> it = validate.iterator();
        for (; it.hasNext(); ) {
            ConstraintViolation<T> next = it.next();
            System.out.println(next);
        }
    }
}

测试#

编写测试类进行测试

public class ValidationUtilTest {
    @Test
    public void testValidate() {
        Gamer gamer = new Gamer();
        gamer.setName("小红帽");
        gamer.setAttack(-1);
        gamer.setDefense(10);
        gamer.setSex(0);
        Equipment equipment = new Equipment().setEquipmentType(1);
        gamer.getEquipments().add(equipment);
        ValidationUtil.validate(gamer);
    }
}

结果#