第一个Servlet程序
- 1.Servlet 的 HelloWorld
1)创建一个 Servlet 接口的实现类。
2)在 web.xml 文件中配置和映射这个 Servlet
public class HelloServlet implements Servlet {
@Override
public void destroy() {
System.out.println("destroy...");
}
@Override
public ServletConfig getServletConfig() {
System.out.println("getServletConfig");
return null;
}
@Override
public String getServletInfo() {
System.out.println("getServletInfo");
return null;
}
@Override
public void init(ServletConfig arg0) throws ServletException {
System.out.println("init");
}
@Override
public void service(ServletRequest arg0, ServletResponse arg1) throws ServletException, IOException {
System.out.println("service");
}
public HelloServlet() {
System.out.println("HelloServlet's construtor");
}
}
<servlet>
<servlet-name>helloServlet</servlet-name>
<servlet-class>com.xs.javaweb.HelloServlet</servlet-class>
</servlet>
<servlet-mapping>
<servlet-name>helloServlet</servlet-name>
<url-pattern>/hello</url-pattern>
</servlet-mapping>