利用IntelliJ IDEA社区版开发servlet

import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import java.io.IOException;
import java.io.PrintWriter;

public class MainServlet extends HttpServlet {

    /**
     * 处理get或post请求
     *
     * @param request
     * @param response
     * @throws javax.servlet.ServletException
     * @throws java.io.IOException
     */
    protected void processRequest(HttpServletRequest request, HttpServletResponse response)
            throws ServletException, IOException {
        response.setContentType("text/html;charset=UTF-8");
        PrintWriter out = response.getWriter();
        out.println("Servlet MainServlet.");
    }

    // <editor-fold defaultstate="collapsed" desc="HttpServlet 内部处理方法">

    @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";
    }

    // </editor-fold>

}

import org.eclipse.jetty.server.Server;
import org.eclipse.jetty.servlet.ServletContextHandler;
import org.eclipse.jetty.servlet.ServletHolder;

public class Main {
    // 端口
    private static final int PORT=8090;
    // 根路径
    private static final String contextPath="/demo";

    public static void main(String[] args) throws Exception {
        // 建立jetty服务器
        Server server=new Server(PORT);
        ServletContextHandler context=new ServletContextHandler(ServletContextHandler.SESSIONS);
        context.setContextPath(contextPath);
        server.setHandler(context);
        // 添加servlet，可添加多个
        context.addServlet(new ServletHolder(new MainServlet()),"/Main");
        // 启动服务器
        server.start();
        server.join();
    }
}

<?xml version="1.0" encoding="UTF-8"?>
<web-app version="3.1" xmlns="http://xmlns.jcp.org/xml/ns/javaee" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://xmlns.jcp.org/xml/ns/javaee http://xmlns.jcp.org/xml/ns/javaee/web-app_3_1.xsd">
    <servlet>
        <servlet-name>MainServlet</servlet-name>
        <servlet-class>MainServlet</servlet-class>
    </servlet>
    <servlet-mapping>
        <servlet-name>MainServlet</servlet-name>
        <url-pattern>/Main</url-pattern>
    </servlet-mapping>
    <session-config>
        <session-timeout>
            30
        </session-timeout>
    </session-config>
</web-app>

#if (${PACKAGE_NAME} && ${PACKAGE_NAME} != "")package ${PACKAGE_NAME};#end
import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import java.io.IOException;
import java.io.PrintWriter;

/**
 * Created by ${USER} on ${YEAR}-${MONTH}-${DAY} ${HOUR}:${MINUTE}.
 */
public class ${NAME} extends HttpServlet {

    /**
     * 处理get或post请求
     *
     * @param request
     * @param response
     * @throws javax.servlet.ServletException
     * @throws java.io.IOException
     */
    protected void processRequest(HttpServletRequest request, HttpServletResponse response)
            throws ServletException, IOException {
        response.setContentType("text/html;charset=UTF-8");
        PrintWriter out = response.getWriter();
        out.println("Servlet ${NAME}.");
    }

    // <editor-fold defaultstate="collapsed" desc="HttpServlet 内部处理方法">

    @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";
    }
    
    // </editor-fold>

}

利用IntelliJ IDEA社区版开发servlet

原文：http://my.oschina.net/lonewolf/blog/346920