org.springframework.validation

类 ValidationUtils

java.lang.Object

org.springframework.validation.ValidationUtils

public abstract class ValidationUtils
extends Object

Utility class offering convenient methods for invoking a Validator and for rejecting empty fields.

Checks for an empty field in Validator implementations can become one-liners when using rejectIfEmpty(org.springframework.validation.Errors, java.lang.String, java.lang.String) or rejectIfEmptyOrWhitespace(org.springframework.validation.Errors, java.lang.String, java.lang.String).

从以下版本开始:

06.05.2003

作者:

Juergen Hoeller, Dmitriy Kopylenko

另请参阅:

Validator, Errors

构造器概要

构造器

构造器和说明
ValidationUtils()

方法概要

限定符和类型	方法和说明
static void	invokeValidator(Validator validator, Object obj, Errors errors) Invoke the given Validator for the supplied object and Errors instance.
static void	invokeValidator(Validator validator, Object obj, Errors errors, Object... validationHints) Invoke the given Validator/SmartValidator for the supplied object and Errors instance.
static void	rejectIfEmpty(Errors errors, String field, String errorCode) Reject the given field with the given error code if the value is empty.
static void	rejectIfEmpty(Errors errors, String field, String errorCode, Object[] errorArgs) Reject the given field with the given error code and error arguments if the value is empty.
static void	rejectIfEmpty(Errors errors, String field, String errorCode, Object[] errorArgs, String defaultMessage) Reject the given field with the given error code, error arguments and default message if the value is empty.
static void	rejectIfEmpty(Errors errors, String field, String errorCode, String defaultMessage) Reject the given field with the given error code and default message if the value is empty.
static void	rejectIfEmptyOrWhitespace(Errors errors, String field, String errorCode) Reject the given field with the given error code if the value is empty or just contains whitespace.
static void	rejectIfEmptyOrWhitespace(Errors errors, String field, String errorCode, Object[] errorArgs) Reject the given field with the given error code and error arguments if the value is empty or just contains whitespace.
static void	rejectIfEmptyOrWhitespace(Errors errors, String field, String errorCode, Object[] errorArgs, String defaultMessage) Reject the given field with the given error code, error arguments and default message if the value is empty or just contains whitespace.
static void	rejectIfEmptyOrWhitespace(Errors errors, String field, String errorCode, String defaultMessage) Reject the given field with the given error code and default message if the value is empty or just contains whitespace.

从类继承的方法 java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

构造器详细资料

ValidationUtils

public ValidationUtils()

方法详细资料

invokeValidator

public static void invokeValidator(Validator validator,
                                   Object obj,
                                   Errors errors)

Invoke the given Validator for the supplied object and Errors instance.

参数:

validator - the Validator to be invoked (must not be null)

obj - the object to bind the parameters to

errors - the Errors instance that should store the errors (must not be null)

抛出:

IllegalArgumentException - if either of the Validator or Errors arguments is null, or if the supplied Validator does not support the validation of the supplied object's type

invokeValidator

public static void invokeValidator(Validator validator,
                                   @Nullable
                                   Object obj,
                                   Errors errors,
                                   @Nullable
                                   Object... validationHints)

Invoke the given Validator/SmartValidator for the supplied object and Errors instance.

参数:

validator - the Validator to be invoked (must not be null)

obj - the object to bind the parameters to

errors - the Errors instance that should store the errors (must not be null)

validationHints - one or more hint objects to be passed to the validation engine

抛出:

IllegalArgumentException - if either of the Validator or Errors arguments is null, or if the supplied Validator does not support the validation of the supplied object's type

rejectIfEmpty

public static void rejectIfEmpty(Errors errors,
                                 String field,
                                 String errorCode)

Reject the given field with the given error code if the value is empty.

An 'empty' value in this context means either null or the empty string "".

The object whose field is being validated does not need to be passed in because the Errors instance can resolve field values by itself (it will usually hold an internal reference to the target object).

参数:

errors - the Errors instance to register errors on

field - the field name to check

errorCode - the error code, interpretable as message key

rejectIfEmpty

public static void rejectIfEmpty(Errors errors,
                                 String field,
                                 String errorCode,
                                 String defaultMessage)

Reject the given field with the given error code and default message if the value is empty.

An 'empty' value in this context means either null or the empty string "".

The object whose field is being validated does not need to be passed in because the Errors instance can resolve field values by itself (it will usually hold an internal reference to the target object).

参数:

errors - the Errors instance to register errors on

field - the field name to check

errorCode - error code, interpretable as message key

defaultMessage - fallback default message

rejectIfEmpty

public static void rejectIfEmpty(Errors errors,
                                 String field,
                                 String errorCode,
                                 Object[] errorArgs)

Reject the given field with the given error code and error arguments if the value is empty.

An 'empty' value in this context means either null or the empty string "".

The object whose field is being validated does not need to be passed in because the Errors instance can resolve field values by itself (it will usually hold an internal reference to the target object).

参数:

errors - the Errors instance to register errors on

field - the field name to check

errorCode - the error code, interpretable as message key

errorArgs - the error arguments, for argument binding via MessageFormat (can be null)

rejectIfEmpty

public static void rejectIfEmpty(Errors errors,
                                 String field,
                                 String errorCode,
                                 @Nullable
                                 Object[] errorArgs,
                                 @Nullable
                                 String defaultMessage)

Reject the given field with the given error code, error arguments and default message if the value is empty.

An 'empty' value in this context means either null or the empty string "".

The object whose field is being validated does not need to be passed in because the Errors instance can resolve field values by itself (it will usually hold an internal reference to the target object).

参数:

errors - the Errors instance to register errors on

field - the field name to check

errorCode - the error code, interpretable as message key

errorArgs - the error arguments, for argument binding via MessageFormat (can be null)

defaultMessage - fallback default message

rejectIfEmptyOrWhitespace

public static void rejectIfEmptyOrWhitespace(Errors errors,
                                             String field,
                                             String errorCode)

Reject the given field with the given error code if the value is empty or just contains whitespace.

An 'empty' value in this context means either null, the empty string "", or consisting wholly of whitespace.

The object whose field is being validated does not need to be passed in because the Errors instance can resolve field values by itself (it will usually hold an internal reference to the target object).

参数:

errors - the Errors instance to register errors on

field - the field name to check

errorCode - the error code, interpretable as message key

rejectIfEmptyOrWhitespace

public static void rejectIfEmptyOrWhitespace(Errors errors,
                                             String field,
                                             String errorCode,
                                             String defaultMessage)

Reject the given field with the given error code and default message if the value is empty or just contains whitespace.

An 'empty' value in this context means either null, the empty string "", or consisting wholly of whitespace.

The object whose field is being validated does not need to be passed in because the Errors instance can resolve field values by itself (it will usually hold an internal reference to the target object).

参数:

errors - the Errors instance to register errors on

field - the field name to check

errorCode - the error code, interpretable as message key

defaultMessage - fallback default message

rejectIfEmptyOrWhitespace

public static void rejectIfEmptyOrWhitespace(Errors errors,
                                             String field,
                                             String errorCode,
                                             @Nullable
                                             Object[] errorArgs)

Reject the given field with the given error code and error arguments if the value is empty or just contains whitespace.

An 'empty' value in this context means either null, the empty string "", or consisting wholly of whitespace.

The object whose field is being validated does not need to be passed in because the Errors instance can resolve field values by itself (it will usually hold an internal reference to the target object).

参数:

errors - the Errors instance to register errors on

field - the field name to check

errorCode - the error code, interpretable as message key

errorArgs - the error arguments, for argument binding via MessageFormat (can be null)

rejectIfEmptyOrWhitespace

public static void rejectIfEmptyOrWhitespace(Errors errors,
                                             String field,
                                             String errorCode,
                                             @Nullable
                                             Object[] errorArgs,
                                             @Nullable
                                             String defaultMessage)

Reject the given field with the given error code, error arguments and default message if the value is empty or just contains whitespace.

An 'empty' value in this context means either null, the empty string "", or consisting wholly of whitespace.

The object whose field is being validated does not need to be passed in because the Errors instance can resolve field values by itself (it will usually hold an internal reference to the target object).

参数:

errors - the Errors instance to register errors on

field - the field name to check

errorCode - the error code, interpretable as message key

errorArgs - the error arguments, for argument binding via MessageFormat (can be null)

defaultMessage - fallback default message