Class ServletRequestDataBinder
- All Implemented Interfaces:
PropertyEditorRegistry
,TypeConverter
- Direct Known Subclasses:
ExtendedServletRequestDataBinder
DataBinder
to perform data binding
from servlet request parameters to JavaBeans, including support for multipart files.
WARNING: Data binding can lead to security issues by exposing parts of the object graph that are not meant to be accessed or modified by external clients. Therefore the design and use of data binding should be considered carefully with regard to security. For more details, please refer to the dedicated sections on data binding for Spring Web MVC and Spring WebFlux in the reference manual.
See the DataBinder/WebDataBinder superclasses for customization options, which include specifying allowed/required fields, and registering custom property editors.
Can also be used for manual data binding in custom web controllers:
for example, in a plain Controller implementation or in a MultiActionController
handler method. Simply instantiate a ServletRequestDataBinder for each binding
process, and invoke bind
with the current ServletRequest as argument:
MyBean myBean = new MyBean(); // apply binder to custom target object ServletRequestDataBinder binder = new ServletRequestDataBinder(myBean); // register custom editors, if desired binder.registerCustomEditor(...); // trigger actual binding of request parameters binder.bind(request); // optionally evaluate binding errors Errors errors = binder.getErrors(); ...
- Author:
- Rod Johnson, Juergen Hoeller
- See Also:
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Field Summary
Fields inherited from class org.springframework.web.bind.WebDataBinder
DEFAULT_FIELD_DEFAULT_PREFIX, DEFAULT_FIELD_MARKER_PREFIX
Fields inherited from class org.springframework.validation.DataBinder
DEFAULT_AUTO_GROW_COLLECTION_LIMIT, DEFAULT_OBJECT_NAME, logger
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Constructor Summary
ConstructorDescriptionServletRequestDataBinder
(Object target) Create a new ServletRequestDataBinder instance, with default object name.ServletRequestDataBinder
(Object target, String objectName) Create a new ServletRequestDataBinder instance. -
Method Summary
Modifier and TypeMethodDescriptionprotected void
addBindValues
(MutablePropertyValues mpvs, ServletRequest request) Extension point that subclasses can use to add extra bind values for a request.void
bind
(ServletRequest request) Bind the parameters of the given request to this binder's target, also binding multipart files in case of a multipart request.void
Treats errors as fatal.Methods inherited from class org.springframework.web.bind.WebDataBinder
adaptEmptyArrayIndices, bindMultipart, checkFieldDefaults, checkFieldMarkers, doBind, getEmptyValue, getEmptyValue, getFieldDefaultPrefix, getFieldMarkerPrefix, isBindEmptyMultipartFiles, setBindEmptyMultipartFiles, setFieldDefaultPrefix, setFieldMarkerPrefix
Methods inherited from class org.springframework.validation.DataBinder
addCustomFormatter, addCustomFormatter, addCustomFormatter, addValidators, applyPropertyValues, bind, checkAllowedFields, checkRequiredFields, close, convertIfNecessary, convertIfNecessary, convertIfNecessary, convertIfNecessary, createBeanPropertyBindingResult, createDirectFieldBindingResult, findCustomEditor, getAllowedFields, getAutoGrowCollectionLimit, getBindingErrorProcessor, getBindingResult, getConversionService, getDisallowedFields, getInternalBindingResult, getObjectName, getPropertyAccessor, getPropertyEditorRegistry, getRequiredFields, getSimpleTypeConverter, getTarget, getTypeConverter, getValidator, getValidators, initBeanPropertyAccess, initDirectFieldAccess, isAllowed, isAutoGrowNestedPaths, isIgnoreInvalidFields, isIgnoreUnknownFields, registerCustomEditor, registerCustomEditor, replaceValidators, setAllowedFields, setAutoGrowCollectionLimit, setAutoGrowNestedPaths, setBindingErrorProcessor, setConversionService, setDisallowedFields, setIgnoreInvalidFields, setIgnoreUnknownFields, setMessageCodesResolver, setRequiredFields, setValidator, validate, validate
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Constructor Details
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ServletRequestDataBinder
Create a new ServletRequestDataBinder instance, with default object name.- Parameters:
target
- the target object to bind onto (ornull
if the binder is just used to convert a plain parameter value)- See Also:
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ServletRequestDataBinder
Create a new ServletRequestDataBinder instance.- Parameters:
target
- the target object to bind onto (ornull
if the binder is just used to convert a plain parameter value)objectName
- the name of the target object
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Method Details
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bind
Bind the parameters of the given request to this binder's target, also binding multipart files in case of a multipart request.This call can create field errors, representing basic binding errors like a required field (code "required"), or type mismatch between value and bean property (code "typeMismatch").
Multipart files are bound via their parameter name, just like normal HTTP parameters: i.e. "uploadedFile" to an "uploadedFile" bean property, invoking a "setUploadedFile" setter method.
The type of the target property for a multipart file can be MultipartFile, byte[], or String. Servlet Part binding is also supported when the request has not been parsed to MultipartRequest via MultipartResolver.
- Parameters:
request
- the request with parameters to bind (can be multipart)- See Also:
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addBindValues
Extension point that subclasses can use to add extra bind values for a request. Invoked beforeWebDataBinder.doBind(MutablePropertyValues)
. The default implementation is empty.- Parameters:
mpvs
- the property values that will be used for data bindingrequest
- the current request
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closeNoCatch
Treats errors as fatal.Use this method only if it's an error if the input isn't valid. This might be appropriate if all input is from dropdowns, for example.
- Throws:
ServletRequestBindingException
- subclass of ServletException on any binding problem
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