基于Servlet3.0规范的一个HelloWorld-优快云博客

在环境Java EE 6 + GlassFish v3 + NetBeans IDE 6.8 下的一个简单的Servlet程序:

/**
 *
 * @author pylxy
 */
@WebServlet(name="MyServlet", urlPatterns={"/MyServlet"})
public class MyServlet extends HttpServlet {

    protected void processRequest(HttpServletRequest request, HttpServletResponse response)
    throws ServletException, IOException {
        response.setContentType("text/html;charset=UTF-8");
        PrintWriter out = response.getWriter();
        try {
            out.println("<html>");
            out.println("<head>");
            out.println("<title>Servlet3.0 HelloWorld</title>");
            out.println("</head>");
            out.println("<body>");
            out.println("<h1>Hello! Servlet3.0规范</h1>");
            out.println("</body>");
            out.println("</html>");
          
        } finally { 
            out.close();
        }
    } 

    @Override
    protected void doGet(HttpServletRequest request, HttpServletResponse response)
    throws ServletException, IOException {
        processRequest(request, response);
    } 

    @Override
    protected void doPost(HttpServletRequest request, HttpServletResponse response)
    throws ServletException, IOException {
        processRequest(request, response);
    }


    @Override
    public String getServletInfo() {
        return "Short description";
    }
}

注解@WebServlet(name="MyServlet", urlPatterns={"/MyServlet"})，标识这一个类为Servlet类，当然这个类也要继承HttpServlet 类.name是区分不同Servlet类的一个标识，urlPatterns表示此Servlet访问的路径: 在浏览器访问路径为

http://localhost:8080/HelloWorld/MyServlet ,输出内容为: