value：指定某些值匹配

@Data
@Accessors(chain = true)
public class WhiteAEntity {
    @Matcher({"a","b","c","null"})
    private String name;
    private String address;
}

注意：测试代码这里全部采用Spock测试框架进行工具方面的测试，主要是为了方便

def "只有指定的值才能通过"() {
    given:
    WhiteAEntity entity = new WhiteAEntity()
    entity.setName(name as String)
    expect:
    boolean actResult = MkValidators.check(entity)
    if (!actResult) {
        println MkValidators.getErrMsgChain()
    }
    Assert.assertEquals(result, actResult)
    where:
    name | result
    "a"  | true
    "b"  | true
    "c"  | true
    null | true
    "d"  | false
}