package com.lovecoding.xml.servlet; import javax.servlet.*; import java.io.IOException; import java.io.PrintWriter; /** * 假设说我在这里写业务代码 * 我们最终要展示给用户看 * 那么用户呢只能看到 JSP 页面的HTML */ public class DemoServlet implements Servlet { public void test(ServletResponse servletResponse) throws IOException { /** * 我们只需要在 web.xml 里面定义 URL 匹配路径并指定Servlet 处理类 * 我们就可以接到前端的请求, web.xml 是Tomcat的配置档 */ //System.out.println( "OK" ); //System.out.println( "我是中国人" ); PrintWriter writer = servletResponse.getWriter(); String msg = "

HELLO SERVLET!!!!

"; writer.print(msg); } @Override public void init(ServletConfig servletConfig) throws ServletException { System.out.println( "ServLet 初始化" ); } @Override public ServletConfig getServletConfig() { System.out.println( "ServLet 取配置档" ); return null; } @Override public void service(ServletRequest servletRequest, ServletResponse servletResponse) throws ServletException, IOException { System.out.println( "ServLet 处理业务消息" ); test(servletResponse); } @Override public String getServletInfo() { System.out.println( "ServLet 获取Servlet信息" ); return null; } @Override public void destroy() { System.out.println( "ServLet 销毁" ); } }