myeclipse 第一个程序就不能运行，请各位帮忙指教
刚装的myeclipse2013 all-in-one，建立web project工程和程序servlet文档结构如图
程序内容：
import java.io.IOException;
import java.io.PrintWriter;
import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
public class HelloServlet extends HttpServlet {
/**
* Constructor of the object.
*/
public HelloServlet() {
super();
}
/**
* Destruction of the servlet. <br>
*/
public void destroy() {
super.destroy(); // Just puts "destroy" string in log
// Put your code here
}
/**
* The doGet method of the servlet. <br>
*
* This method is called when a form has its tag value method equals to get.
*
* @param request the request send by the client to the server
* @param response the response send by the server to the client
* @throws ServletException if an error occurred
* @throws IOException if an error occurred
*/
public void doGet(HttpServletRequest request, HttpServletResponse response)
throws ServletException, IOException {
request.setCharacterEncoding("UTF-8");
response.setCharacterEncoding("UTF-8");
response.setContentType("text/html");
PrintWriter out = response.getWriter();
out.println("<!DOCTYPE HTML PUBLIC \"-//W3C//DTD HTML 4.01 Transitional//EN\">");
out.println("<HTML>");
out.println(" <HEAD><TITLE>A Servlet</TITLE></HEAD>");
out.println(" <BODY>");String requestURI=request.getRequestURI();
out.println("<form action='"+requestURI+"' method='post'>");
out.println("Input your name:<input type='text' name='name'/>");
out.println("<input type='submit'/>");
out.println("</form>");
out.println("");
String name=request.getParameter("name");
if(name!=null && name.trim().length()>0){
out.println("Hello,<b>"+name+"</b>.");
out.println(" </BODY>");
out.println("</HTML>");
out.flush();
out.close();
}
}
/**
* The doPost method of the servlet. <br>
*
* This method is called when a form has its tag value method equals to post.
*
* @param request the request send by the client to the server
* @param response the response send by the server to the client
* @throws ServletException if an error occurred
* @throws IOException if an error occurred
*/
public void doPost(HttpServletRequest request, HttpServletResponse response)
throws ServletException, IOException {
response.setContentType("text/html");
PrintWriter out = response.getWriter();
out.println("<!DOCTYPE HTML PUBLIC \"-//W3C//DTD HTML 4.01 Transitional//EN\">");
out.println("<HTML>");
out.println(" <HEAD><TITLE>A Servlet</TITLE></HEAD>");
out.println(" <BODY>");
out.print(" This is ");
out.print(this.getClass());
out.println(", using the POST method");
out.println(" </BODY>");
out.println("</HTML>");
out.flush();
out.close();
}
/**
* Initialization of the servlet. <br>
*
* @throws ServletException if an error occurs
*/
public void init() throws ServletException {
// Put your code here
}
}
web.xml为自动生成，内容：
<?xml version="1.0" encoding="UTF-8"?>
<web-app version="3.0"
xmlns="http://java.sun.com/xml/ns/javaee"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://java.sun.com/xml/ns/javaee http://java.sun.com/xml/ns/javaee/web-app_3_0.xsd">
<servlet>
<description>This is the description of my J2EE component</description>
<display-name>This is the display name of my J2EE component</display-name>
<servlet-name>HelloServlet</servlet-name>
<servlet-class>com.mikedehill.firstweb.HelloServlet</servlet-class>
</servlet>
<servlet-mapping>
<servlet-name>HelloServlet</servlet-name>
<url-pattern>/servlet/HelloServlet</url-pattern>
</servlet-mapping>
</web-app>
tomcat可以启动
2013-7-11 16:53:57 org.apache.tomcat.util.digester.SetPropertiesRule begin
警告: [SetPropertiesRule]{Server/Service/Engine/Host/Context} Setting property 'source' to 'org.eclipse.jst.jee.server:FirstWeb' did not find a matching property.
2013-7-11 16:53:58 org.apache.catalina.core.AprLifecycleListener initializeSSL
信息: OpenSSL successfully initialized (OpenSSL 1.0.1d 5 Feb 2013)
2013-7-11 16:53:59 org.apache.coyote.AbstractProtocol init
信息: Initializing ProtocolHandler ["http-apr-8080"]
2013-7-11 16:53:59 org.apache.coyote.AbstractProtocol init
信息: Initializing ProtocolHandler ["ajp-apr-8009"]
2013-7-11 16:53:59 org.apache.catalina.startup.Catalina load
信息: Initialization processed in 3969 ms
2013-7-11 16:53:59 org.apache.catalina.core.StandardService startInternal
信息: Starting service Catalina
2013-7-11 16:53:59 org.apache.catalina.core.StandardEngine startInternal
信息: Starting Servlet Engine: Apache Tomcat/7.0.40
2013-7-11 16:54:01 org.apache.catalina.startup.HostConfig deployDirectory
信息: Deploying web application directory D:\Program Files\apache-tomcat-7.0.40\webapps\DeployCopy
2013-7-11 16:54:02 org.apache.catalina.startup.HostConfig deployDirectory
信息: Deploying web application directory D:\Program Files\apache-tomcat-7.0.40\webapps\docs
2013-7-11 16:54:02 org.apache.catalina.startup.HostConfig deployDirectory
信息: Deploying web application directory D:\Program Files\apache-tomcat-7.0.40\webapps\examples
2013-7-11 16:54:02 org.apache.catalina.core.ApplicationContext log
信息: ContextListener: contextInitialized()
2013-7-11 16:54:02 org.apache.catalina.core.ApplicationContext log
信息: SessionListener: contextInitialized()
2013-7-11 16:54:02 org.apache.catalina.core.ApplicationContext log
信息: ContextListener: attributeAdded('org.apache.jasper.compiler.TldLocationsCache', 'org.apache.jasper.compiler.TldLocationsCache@1a05bdb')
2013-7-11 16:54:02 org.apache.catalina.startup.HostConfig deployDirectory
信息: Deploying web application directory D:\Program Files\apache-tomcat-7.0.40\webapps\host-manager
2013-7-11 16:54:03 org.apache.catalina.startup.HostConfig deployDirectory
信息: Deploying web application directory D:\Program Files\apache-tomcat-7.0.40\webapps\manager
2013-7-11 16:54:03 org.apache.catalina.startup.HostConfig deployDirectory
信息: Deploying web application directory D:\Program Files\apache-tomcat-7.0.40\webapps\ROOT
2013-7-11 16:54:03 org.apache.coyote.AbstractProtocol start
信息: Starting ProtocolHandler ["http-apr-8080"]
2013-7-11 16:54:03 org.apache.coyote.AbstractProtocol start
信息: Starting ProtocolHandler ["ajp-apr-8009"]
2013-7-11 16:54:03 org.apache.catalina.startup.Catalina start
信息: Server startup in 3952 ms
1、按小三角运行按钮显示：the serve is not specified
2、用浏览器键入：http://localhost:8080/FirstWeb/servlet/HelloServlet后回车，显示：
HTTP Status 404 - /FirstWeb/servlet/HelloServlet
--------------------------------------------
type Status report
message /FirstWeb/servlet/HelloServlet
description The requested resource is not available.
--------------------------------------------
Apache Tomcat/7.0.40
请教各位，这个程序应该如何才能编译运行？
[解决办法]
是你项目没部署成功到的原因，你看你tomcat控制台输出信息，自带的root，manage等都都有输出信息，没有你的firstWeb,你重新部署一下，然后点击run as server application
[解决办法]
404是路径问题，tomcat没有找到
[解决办法]
从tomcat控制台的信息来看，你的项目没有deploy成功~~所以浏览器访问肯定是404。
[解决办法]
没什么问题啊..是不是你的web容器用的是myeclipse中的默认的啊..而且那个三角下面不是都能直接点击的..里面会记录你最近运行的项目名称..说不定你运行的是其他项目而不是你现在这个项目呢..你应该在servlet那个类里面直接点右键..然后run as server就ok了..
[解决办法]
首先，web项目是需要部署到tomcat下的，怎么配置服务器环境怎么部署，百度。
其次，servlet不是java可运行文件，是不能点三角图标来运行的，要部署到tomcat下用url来访问。
[解决办法]
首先要配置好tomcat，其次要将项目部署到tomcat中，然后开启tomcat，最后在浏览器访问！总共四个步骤！至于每一个步骤如何做！我相信只要学了servlet开发的就应该会配置！
[解决办法]
1、工具栏windows->showview->servers
2、servers视图，右键选择Add and Remove
3、选择你的项目添加到server
4、点击三角运行