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The Spring Framework | |||||||||
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java.lang.Object javax.servlet.GenericServlet javax.servlet.http.HttpServlet org.springframework.web.servlet.HttpServletBean
public abstract class HttpServletBean
Simple extension of HttpServlet
which treats
its config parameters (init-param
entries within the
servlet
tag in web.xml
) as bean properties.
A handy superclass for any type of servlet. Type conversion of config parameters is automatic, with the corresponding setter method getting invoked with the converted value. It is also possible for subclasses to specify required properties. Parameters without matching bean property setter will simply be ignored.
This servlet leaves request handling to subclasses, inheriting the default
behavior of HttpServlet (doGet
, doPost
, etc).
This generic servlet base class has no dependency on the Spring
ApplicationContext
concept. Simple
servlets usually don't load their own context but rather access service
beans from the Spring root application context, accessible via the
filter's ServletContext
(see
WebApplicationContextUtils
).
The FrameworkServlet
class is a more specific servlet base
class which loads its own application context. FrameworkServlet serves
as direct base class of Spring's full-fledged DispatcherServlet
.
addRequiredProperty(java.lang.String)
,
initServletBean()
,
HttpServlet.doGet(javax.servlet.http.HttpServletRequest, javax.servlet.http.HttpServletResponse)
,
HttpServlet.doPost(javax.servlet.http.HttpServletRequest, javax.servlet.http.HttpServletResponse)
,
Serialized FormField Summary | |
---|---|
protected Log |
logger
Logger available to subclasses |
Constructor Summary | |
---|---|
HttpServletBean()
|
Method Summary | |
---|---|
protected void |
addRequiredProperty(String property)
Subclasses can invoke this method to specify that this property (which must match a JavaBean property they expose) is mandatory, and must be supplied as a config parameter. |
ServletContext |
getServletContext()
Overridden method that simply returns null when no
ServletConfig set yet. |
String |
getServletName()
Overridden method that simply returns null when no
ServletConfig set yet. |
void |
init()
Map config parameters onto bean properties of this servlet, and invoke subclass initialization. |
protected void |
initBeanWrapper(BeanWrapper bw)
Initialize the BeanWrapper for this HttpServletBean, possibly with custom editors. |
protected void |
initServletBean()
Subclasses may override this to perform custom initialization. |
Methods inherited from class javax.servlet.http.HttpServlet |
---|
doDelete, doGet, doHead, doOptions, doPost, doPut, doTrace, getLastModified, service, service |
Methods inherited from class javax.servlet.GenericServlet |
---|
destroy, getInitParameter, getInitParameterNames, getServletConfig, getServletInfo, init, log, log |
Methods inherited from class java.lang.Object |
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clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait |
Field Detail |
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protected final Log logger
Constructor Detail |
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public HttpServletBean()
Method Detail |
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protected final void addRequiredProperty(String property)
This method is only relevant in case of traditional initialization driven by a ServletConfig instance.
property
- name of the required propertypublic final void init() throws ServletException
init
in class GenericServlet
ServletException
- if bean properties are invalid (or required
properties are missing), or if subclass initialization fails.protected void initBeanWrapper(BeanWrapper bw) throws BeansException
This default implementation is empty.
bw
- the BeanWrapper to initialize
BeansException
- if thrown by BeanWrapper methodsPropertyEditorRegistry.registerCustomEditor(java.lang.Class, java.beans.PropertyEditor)
public final String getServletName()
null
when no
ServletConfig set yet.
getServletName
in interface ServletConfig
getServletName
in class GenericServlet
GenericServlet.getServletConfig()
public final ServletContext getServletContext()
null
when no
ServletConfig set yet.
getServletContext
in interface ServletConfig
getServletContext
in class GenericServlet
GenericServlet.getServletConfig()
protected void initServletBean() throws ServletException
This default implementation is empty.
ServletException
- if subclass initialization fails
|
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