servlet配置了初始化参数后,web容器在建立servlet实例对象时,会自动将这些初始化参数封装到ServletConfig对象中,并在调用servlet的init方法时,将ServletConfig对象传递给servlethtml
<servlet>java
<servlet-name></servlet-name>web
<servlet-class></servlet-class>api
<init-param>this
<param-name></param-name>spa
<param-value></param-value>code
</init-param>htm
</servlet>对象
TIPS:blog
在实际开发中 直接能够经过getServletConfig()获得ServletConfig对象
String |
getInitParameter(String name) Returns a String containing the value of the named initialization parameter, or null if the parameter does not exist. |
Enumeration |
getInitParameterNames() Returns the names of the servlet's initialization parameters as an Enumeration of String objects, or an empty Enumeration if the servlet has no initialization parameters. |
ServletContext |
getServletContext() Returns a reference to the ServletContext in which the caller is executing. |
String |
getServletName() Returns the name of this servlet instance. |