Question

这是我的代码。请帮我解决这个问题。我是servlet的新手，我正尽力解决它，但我无法解决它。

public class InsertData extends GenericServlet{    

    public void service(ServletRequest request, ServletResponse response) throws ServletException, IOException {
        PrintWriter pw = null ;
        ServletConfig conf = getServletConfig(); // This is giving null everytime i m checked it in webpage
        String str = cont.getInitParameter("username");
        pw  = response.getWriter();
        pw.println("<html><body><b>conf</b></body><html>"); 
        }
}

这是我的web.xml文件：

 <web-app>
  <servlet>
    <servlet-name>s1</servlet-name>
    <servlet-class>InsertData</servlet-class>
    <init-param>
        <param-name>username</param-name>
        <param-value>mydb</param-value>
    </init-param>
  </servlet>
  <servlet-mapping>
    <servlet-name>s1</servlet-name>
    <url-pattern>/InsertData</url-pattern>
  </servlet-mapping>
  <welcome-file-list>
    <welcome-file>home.html</welcome-file>  
  </welcome-file-list>
</web-app>

Eclipse：ServletConfig对象在调用getServletConfig（）时返回NULL

0 个答案: