java.lang.Object
- javax.servlet.GenericServlet
- - javax.servlet.http.HttpServlet
  - - org.springframework.web.servlet.HttpServletBean

所有已实现的接口:
Serializable, Servlet, ServletConfig, Aware, EnvironmentAware, EnvironmentCapable
直接已知子类:
FrameworkServlet, ResourceServlet
```
public abstract class HttpServletBean
extends HttpServlet
implements EnvironmentCapable, EnvironmentAware
```
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.
作者:
Rod Johnson, Juergen Hoeller
另请参阅:
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), 序列化表格

字段概要
字段
修饰符和类型字段说明
protected Log logger
Logger available to subclasses

构造器概要
构造器
构造器说明
HttpServletBean()

方法概要

所有方法实例方法具体方法
修饰符和类型	方法	说明
`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.
`protected ConfigurableEnvironment`	`createEnvironment()`	Create and return a new `StandardServletEnvironment`.
`ConfigurableEnvironment`	`getEnvironment()`	Return the `Environment` associated with this servlet.
`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.
`void`	`setEnvironment(Environment environment)`	Set the `Environment` that this servlet runs in.

从类继承的方法 javax.servlet.http.HttpServlet
doDelete, doGet, doHead, doOptions, doPost, doPut, doTrace, getLastModified, service, service

从类继承的方法 javax.servlet.GenericServlet
destroy, getInitParameter, getInitParameterNames, getServletConfig, getServletInfo, init, log, log

从类继承的方法 java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

- 字段详细资料
  - logger
```
protected final Log logger
```
    Logger available to subclasses
- 构造器详细资料
  - HttpServletBean
```
public HttpServletBean()
```
- 方法详细资料
  - addRequiredProperty
```
protected final 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. This should be called from the constructor of a subclass.
    This method is only relevant in case of traditional initialization driven by a ServletConfig instance.
    参数:
    property - name of the required property
  - setEnvironment
```
public void setEnvironment(Environment environment)
```
    Set the Environment that this servlet runs in.
    Any environment set here overrides the StandardServletEnvironment provided by default.
    指定者:
    setEnvironment 在接口中 EnvironmentAware
    抛出:
    IllegalArgumentException - if environment is not assignable to ConfigurableEnvironment
  - getEnvironment
```
public ConfigurableEnvironment getEnvironment()
```
    Return the Environment associated with this servlet.
    If none specified, a default environment will be initialized via createEnvironment().
    指定者:
    getEnvironment 在接口中 EnvironmentCapable
  - createEnvironment
```
protected ConfigurableEnvironment createEnvironment()
```
    Create and return a new StandardServletEnvironment.
    Subclasses may override this in order to configure the environment or specialize the environment type returned.
  - init
```
public final void init()
                throws ServletException
```
    Map config parameters onto bean properties of this servlet, and invoke subclass initialization.
    覆盖:
    init 在类中 GenericServlet
    抛出:
    ServletException - if bean properties are invalid (or required properties are missing), or if subclass initialization fails.
  - initBeanWrapper
```
protected void initBeanWrapper(BeanWrapper bw)
                        throws BeansException
```
    Initialize the BeanWrapper for this HttpServletBean, possibly with custom editors.
    This default implementation is empty.
    参数:
    bw - the BeanWrapper to initialize
    抛出:
    BeansException - if thrown by BeanWrapper methods
    另请参阅:
    PropertyEditorRegistry.registerCustomEditor(java.lang.Class<?>, java.beans.PropertyEditor)
  - initServletBean
```
protected void initServletBean()
                        throws ServletException
```
    Subclasses may override this to perform custom initialization. All bean properties of this servlet will have been set before this method is invoked.
    This default implementation is empty.
    抛出:
    ServletException - if subclass initialization fails
  - getServletName
```
public final String getServletName()
```
    Overridden method that simply returns null when no ServletConfig set yet.
    指定者:
    getServletName 在接口中 ServletConfig
    覆盖:
    getServletName 在类中 GenericServlet
    另请参阅:
    GenericServlet.getServletConfig()
  - getServletContext
```
public final ServletContext getServletContext()
```
    Overridden method that simply returns null when no ServletConfig set yet.
    指定者:
    getServletContext 在接口中 ServletConfig
    覆盖:
    getServletContext 在类中 GenericServlet
    另请参阅:
    GenericServlet.getServletConfig()

类 HttpServletBean

字段概要

构造器概要

方法概要

从类继承的方法 javax.servlet.http.HttpServlet

从类继承的方法 javax.servlet.GenericServlet

从类继承的方法 java.lang.Object

字段详细资料

logger

构造器详细资料

HttpServletBean

方法详细资料

addRequiredProperty

setEnvironment

getEnvironment

createEnvironment

init

initBeanWrapper

initServletBean

getServletName

getServletContext