Servlets Eclipse:ServletConfig对象在调用getServletConfig()时返回NULL
这是我的密码。请帮我解决这个问题。我是servlet新手,我正在尽力解决它,但我无能为力Servlets Eclipse:ServletConfig对象在调用getServletConfig()时返回NULL,servlets,Servlets,这是我的密码。请帮我解决这个问题。我是servlet新手,我正在尽力解决它,但我无能为力 public class InsertData extends GenericServlet{ public void service(ServletRequest request, ServletResponse response) throws ServletException, IOException { PrintWriter pw = null ;
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>");
}
}
公共类InsertData扩展了GenericServlet{
公共void服务(ServletRequest请求、ServletResponse响应)抛出ServletException、IOException{
PrintWriter pw=null;
ServletConfig conf=getServletConfig();//每次我在网页中检查它时,都会给出null
字符串str=cont.getInitParameter(“用户名”);
pw=response.getWriter();
pw.println(“conf”);
}
}
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>
s1
插入数据
用户名
mydb
s1
/插入数据
home.html
如何运行servlet?在eclipse中使用Apache服务器。