Servlet中的几个容器方法

public void service(ServletRequest req,ServletResponse res) throws ServletException,java.io.IOException

源自接口javax.servlet.Servlet,容器实现,委派调用

protected void service(HttpServletRequest req,HttpServletResponse res) throws ServletException,java.io.IOException

该方法再按照client的request方法是get,post等等(采用javax.servlet.ServletRequest.getMethod()方法),委派给

protected void doXXX(HttpServletRequest req,HttpServletResponse res) throws ServletException,java.io.IOException

方法.

所以若确定request method类型的话,一般不要覆写两个service方法,而直接覆写doXXX方法