内置的约束条件

Hibernate Validator包含了一些基本的使用比较广的约束,下面是一些Hibernate Validator给出的最常用的约束.另外Hibernate Validator还提供了一些有有的custom约束.

一.Bean Validation constraints

下面是一些常的constraints,它们的作用,支持的数据类型.它们全部都是属性级别的注释,如果你使用Hibernate 对象-关系映射,当你为你的model创建ddl时,有一些约束是要被考虑在内的.

注意:Hibernate Validator的有些约束是能支持比Bean Validation specification要求的数据类型的更多的类型.e.g. @Max can be applied to Strings

 

Annotation	Supported data types	作用	Hibernate metadata impact
@AssertFalse	Boolean ,  boolean	Checks that the annotated element is false .	没有
@AssertTrue	Boolean ,  boolean	Checks that the annotated element is true .	没有
@DecimalMax	BigDecimal , BigInteger , String , byte , short , int , long and the respective wrappers of the primitive types. Additionally supported by HV: any sub-type of Number and CharSequence .	被标注的值必须 不大于约束中指定 的最大值. 这个约 束的参数是一个通 过 BigDecimal 定义的最 大值的字符串表示.	没有
@DecimalMin	BigDecimal , BigInteger , String , byte , short , int , long and the respective wrappers of the primitive types. Additionally supported by HV: any sub-type of Number and CharSequence .	被标注的值必须 不小于约束中指定 的最小值. 这个约 束的参数是一个通 过 BigDecimal 定义的最 小值的字符串表示.	没有
@Digits(integer=, fraction=	BigDecimal , BigInteger , String , byte , short , int , long and the respective wrappers of the primitive types. Additionally supported by HV: any sub-type of Number and CharSequence .	Checks whether the annoted value is a number having up to integer digits and fraction fractional digits	对应的数据库表 字段会被设置精度 (precision)和准度 (scale).
@Future	java.util.Date , java.util.Calendar ; Additionally supported by HV, if the Joda Time [http://joda- time.sourceforge.net/ ] date/time API is on the class path: any implementations of ReadablePartial and ReadableInstant .	检查给定的日期是否 比现在晚.	没有
@Max	BigDecimal , BigInteger , byte , short , int , long and the respective wrappers of the primitive types. Additionally supported by HV: any sub-type of CharSequence (the numeric value represented by the char sequence is evaluated), any sub-type of Number .	检查该值是否大于或 等于约束条件中规定 的最大值	会给对应的数据库表 字段添加一个check的 约束条件.
@Min	BigDecimal , BigInteger , byte , short , int , long and the respective wrappers of the primitive types. Additionally supported by HV: any sub-type of CharSequence (the numeric value represented by the char sequence is evaluated), any sub-type of Number .	检查该值是否大于或 等于约束条件中规定 的最小值.	的最小值. 会给对应的数据库表 字段添加一个check的 约束条件.
@NotNull	Any type	Checks that the annotated value is not null.	对应的表字段不允许 为null.
@Null	Any type	Checks that the annotated value is  null.	没有
@Past	java.util.Date , java.util.Calendar ; Additionally supported by HV, if the Joda Time [http://joda- time.sourceforge.net/ ] date/time API is on the class path: any implementations of ReadablePartial and ReadableInstant .	检查标注对象中的值 表示的日期比当前早.	没有
@Pattern(regex=, flag=	String . Additionally supported by HV: any sub-type of CharSequence	检查该字符串是否能 够在 match 指定的情况 下被 regex 定义的正则 表达式匹配.	没有
@Size(min=, max=)	String , Collection , Map and arrays . Additionally supported by HV: any sub-type of CharSequence .	Checks if the annotated element's size is between min and max (inclusive).	对应的数据库表字段 的长度会被设置成约 束中定义的最大值.
@Valid	Any non-primitive type	递归的对关联对象进 行校验, 如果关联对 象是个集合或者数组, 那么对其中的元素进 行递归校验,如果是一 个map,则对其中的值 部分进行校验	没有
注意:        这些约束都能支持message,groups,payload的参数

 

 

二,Additional constraints

除了Bean Validation API Hibernate Validator中的约束外,还有一些有用的定制的约束.其中@ScriptAssert是一个类级别的注释

Annotation	Supported data types	作用	Hibernate metadata impact
@CreditCardNumber	CharSequence	Checks that the annotated character sequence passes the Luhn checksum test. Note, this validation aims to check for user mistakes, not credit card validity! See also Anatomy of Credit Card Numbers [http:// www.merriampark.com/ anatomycc.htm].	没有
@Email	CharSequence	Checks whether the specified character sequence is a valid email address. The optional parameters regexp and flags allow to specify an additional regular expression (including regular expression flags) which the email must match.	没有
@Length(min=, max=)	CharSequence	Validates that the annotated character sequence is between min and max included.	对应的数据库表字段 的长度会被设置成约 束中定义的最大值
@ModCheck(modType=, multiplier=, startIndex=, endIndex=, checkDigitPosition=, ignoreNonDigitCharacters=)	CharSequence	Checks that the digits within the annotated character sequence pass the mod 10 or mod 11 checksum algorithm. modType is used to select the modulo type and the multiplier determines the algorithm specific multiplier (see also Luhn algorithm [http:// en.wikipedia.org/ wiki/ Luhn_algorithm]). startIndex and endIndex allow to only run the modulo algorithm on the specified sub-string. checkDigitPosition allows to use an arbitrary digit within the character sequence to be the check digit. If not specified it is assumed that the check digit is part of the specified range. Last but not least, ignoreNonDigitCharacters allows to ignore non digit characters.	没有
@NotBlank	CharSequence	Checks that the annotated character sequence is not null and the trimmed length is greater than 0. The difference to @NotEmpty is that this constraint can only be applied on strings and that trailing whitespaces are ignored.	没有
@NotEmpty	CharSequence , Collection , Map and arrays	Checks whether the annotated element is not null nor empty	没有
@Range(min=, max=)	BigDecimal , BigInteger , CharSequence , byte , short , int , long and the respective wrappers of the primitive types	Checks whether the annotated value lies between (inclusive) the specified minimum and maximum.	没有
@SafeHtml(whitelistType=, additionalTags=)	CharSequence	Checks whether the annotated value contains potentially malicious fragments such as <script/ > . In order to use this constraint, the jsoup [http:// jsoup.org/] library must be part of the class path. With the whitelistType attribute predefined whitelist types can be chosen. You can also specify additional html tags for the whitelist with the additionalTags attribute.	没有
@ScriptAssert(lang=, script=, alias=)	Any type	Checks whether the given script can successfully be evaluated against the annotated element. In order to use this constraint, an implementation of the Java Scripting API as defined by JSR 223 ("Scripting for the Java TM Platform") must part of the class path. The expressions to be evaluated can be written in any scripting or expression language, for which a JSR 223 compatible engine can be found in the class path.	没有
@URL(protocol=, host=, port=, regexp=, flags=)	CharSequence	Checks if the annotated character sequence is a valid URL according to RFC2396. If any of the optional parameters protocol , host or port are specified, the corresponding URL fragments must match the specified values. The optional parameters regexp and flags allow to specify an additional regular expression (including regular expression flags) which the URL must match.	没有

 

 三, Country specific constraints(略)