genericservlet.html

j2ee帮助文档软件设计/软件工程 文件格式

<DD><DL>

<DT><B>Returns:</B><DD>String          information about this servlet, by default an
                                empty string</DL>
</DD>
</DL>
<HR>

<A NAME="init(javax.servlet.ServletConfig)"><!-- --></A><H3>
init</H3>
<PRE>
public void <B>init</B>(<A HREF="../../javax/servlet/ServletConfig.html" title="interface in javax.servlet">ServletConfig</A>&nbsp;config)
          throws <A HREF="../../javax/servlet/ServletException.html" title="class in javax.servlet">ServletException</A></PRE>
<DL>
<DD>Called by the servlet container to indicate to a servlet that the
 servlet is being placed into service.  See <A HREF="../../javax/servlet/Servlet.html#init(javax.servlet.ServletConfig)"><CODE>Servlet.init(javax.servlet.ServletConfig)</CODE></A>.

 <p>This implementation stores the <A HREF="../../javax/servlet/ServletConfig.html" title="interface in javax.servlet"><CODE>ServletConfig</CODE></A>
 object it receives from the servlet container for later use.
 When overriding this form of the method, call 
 <code>super.init(config)</code>.
<P>
<DD><DL>
<DT><B>Specified by:</B><DD><CODE><A HREF="../../javax/servlet/Servlet.html#init(javax.servlet.ServletConfig)">init</A></CODE> in interface <CODE><A HREF="../../javax/servlet/Servlet.html" title="interface in javax.servlet">Servlet</A></CODE></DL>
</DD>
<DD><DL>
<DT><B>Parameters:</B><DD><CODE>config</CODE> - the <code>ServletConfig</code> object
                                        that contains configutation
                                        information for this servlet
<DT><B>Throws:</B>
<DD><CODE><A HREF="../../javax/servlet/ServletException.html" title="class in javax.servlet">ServletException</A></CODE> - if an exception occurs that
                                        interrupts the servlet's normal
                                        operation<DT><B>See Also:</B><DD><A HREF="../../javax/servlet/UnavailableException.html" title="class in javax.servlet"><CODE>UnavailableException</CODE></A></DL>
</DD>
</DL>
<HR>

<A NAME="init()"><!-- --></A><H3>
init</H3>
<PRE>
public void <B>init</B>()
          throws <A HREF="../../javax/servlet/ServletException.html" title="class in javax.servlet">ServletException</A></PRE>
<DL>
<DD>A convenience method which can be overridden so that there's no need
 to call <code>super.init(config)</code>.

 <p>Instead of overriding <A HREF="../../javax/servlet/GenericServlet.html#init(javax.servlet.ServletConfig)"><CODE>init(ServletConfig)</CODE></A>, simply override
 this method and it will be called by
 <code>GenericServlet.init(ServletConfig config)</code>.
 The <code>ServletConfig</code> object can still be retrieved via <A HREF="../../javax/servlet/GenericServlet.html#getServletConfig()"><CODE>getServletConfig()</CODE></A>.
<P>
<DD><DL>
</DL>
</DD>
<DD><DL>

<DT><B>Throws:</B>
<DD><CODE><A HREF="../../javax/servlet/ServletException.html" title="class in javax.servlet">ServletException</A></CODE> - if an exception occurs that
                                        interrupts the servlet's
                                        normal operation</DL>
</DD>
</DL>
<HR>

<A NAME="log(java.lang.String)"><!-- --></A><H3>
log</H3>
<PRE>
public void <B>log</B>(<A HREF="http://java.sun.com/j2se/1.5/docs/api/java/lang/String.html" title="class or interface in java.lang">String</A>&nbsp;msg)</PRE>
<DL>
<DD>Writes the specified message to a servlet log file, prepended by the
 servlet's name.  See <A HREF="../../javax/servlet/ServletContext.html#log(java.lang.String)"><CODE>ServletContext.log(String)</CODE></A>.
<P>
<DD><DL>
</DL>
</DD>
<DD><DL>
<DT><B>Parameters:</B><DD><CODE>msg</CODE> - a <code>String</code> specifying
                        the message to be written to the log file</DL>
</DD>
</DL>
<HR>

<A NAME="log(java.lang.String, java.lang.Throwable)"><!-- --></A><H3>
log</H3>
<PRE>
public void <B>log</B>(<A HREF="http://java.sun.com/j2se/1.5/docs/api/java/lang/String.html" title="class or interface in java.lang">String</A>&nbsp;message,
                <A HREF="http://java.sun.com/j2se/1.5/docs/api/java/lang/Throwable.html" title="class or interface in java.lang">Throwable</A>&nbsp;t)</PRE>
<DL>
<DD>Writes an explanatory message and a stack trace
 for a given <code>Throwable</code> exception
 to the servlet log file, prepended by the servlet's name.
 See <A HREF="../../javax/servlet/ServletContext.html#log(java.lang.String, java.lang.Throwable)"><CODE>ServletContext.log(String, Throwable)</CODE></A>.
<P>
<DD><DL>
</DL>
</DD>
<DD><DL>
<DT><B>Parameters:</B><DD><CODE>message</CODE> - a <code>String</code> that describes
                                the error or exception<DD><CODE>t</CODE> - the <code>java.lang.Throwable</code> error
                                or exception</DL>
</DD>
</DL>
<HR>

<A NAME="service(javax.servlet.ServletRequest, javax.servlet.ServletResponse)"><!-- --></A><H3>
service</H3>
<PRE>
public abstract void <B>service</B>(<A HREF="../../javax/servlet/ServletRequest.html" title="interface in javax.servlet">ServletRequest</A>&nbsp;req,
                             <A HREF="../../javax/servlet/ServletResponse.html" title="interface in javax.servlet">ServletResponse</A>&nbsp;res)
                      throws <A HREF="../../javax/servlet/ServletException.html" title="class in javax.servlet">ServletException</A>,
                             <A HREF="http://java.sun.com/j2se/1.5/docs/api/java/io/IOException.html" title="class or interface in java.io">IOException</A></PRE>
<DL>
<DD>Called by the servlet container to allow the servlet to respond to
 a request.  See <A HREF="../../javax/servlet/Servlet.html#service(javax.servlet.ServletRequest, javax.servlet.ServletResponse)"><CODE>Servlet.service(javax.servlet.ServletRequest, javax.servlet.ServletResponse)</CODE></A>.
 
 <p>This method is declared abstract so subclasses, such as 
 <code>HttpServlet</code>, must override it.
<P>
<DD><DL>
<DT><B>Specified by:</B><DD><CODE><A HREF="../../javax/servlet/Servlet.html#service(javax.servlet.ServletRequest, javax.servlet.ServletResponse)">service</A></CODE> in interface <CODE><A HREF="../../javax/servlet/Servlet.html" title="interface in javax.servlet">Servlet</A></CODE></DL>
</DD>
<DD><DL>
<DT><B>Parameters:</B><DD><CODE>req</CODE> - the <code>ServletRequest</code> object
                        that contains the client's request<DD><CODE>res</CODE> - the <code>ServletResponse</code> object
                        that will contain the servlet's response
<DT><B>Throws:</B>
<DD><CODE><A HREF="../../javax/servlet/ServletException.html" title="class in javax.servlet">ServletException</A></CODE> - if an exception occurs that
                                        interferes with the servlet's
                                        normal operation occurred
<DD><CODE><A HREF="http://java.sun.com/j2se/1.5/docs/api/java/io/IOException.html" title="class or interface in java.io">IOException</A></CODE> - if an input or output
                                        exception occurs</DL>
</DD>
</DL>
<HR>

<A NAME="getServletName()"><!-- --></A><H3>
getServletName</H3>
<PRE>
public <A HREF="http://java.sun.com/j2se/1.5/docs/api/java/lang/String.html" title="class or interface in java.lang">String</A> <B>getServletName</B>()</PRE>
<DL>
<DD>Returns the name of this servlet instance.
 See <A HREF="../../javax/servlet/ServletConfig.html#getServletName()"><CODE>ServletConfig.getServletName()</CODE></A>.
<P>
<DD><DL>
<DT><B>Specified by:</B><DD><CODE><A HREF="../../javax/servlet/ServletConfig.html#getServletName()">getServletName</A></CODE> in interface <CODE><A HREF="../../javax/servlet/ServletConfig.html" title="interface in javax.servlet">ServletConfig</A></CODE></DL>
</DD>
<DD><DL>

<DT><B>Returns:</B><DD>the name of this servlet instance</DL>
</DD>
</DL>
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