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在tomcat上全手工部署Servlet3.0

时间:2016-05-05 22:31:59      阅读:318      评论:0      收藏:0      [点我收藏+]

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从头写java文件的方式,编译成CLASS文件,加强对SERVLET容器的理解。

稍后试试JAR和WAR包。

文件内容(跟以前用IDE的一样):

HelloServlet.java:

package cc.openhome;

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

/**
 * Servlet implementation class HelloServlet
 */
@WebServlet(urlPatterns = {"/hello.view"})
public class HelloServlet extends HttpServlet {
    private static final long serialVersionUID = 1L;

    /**
     * @see HttpServlet#HttpServlet()
     */
    public HelloServlet() {
        super();
        // TODO Auto-generated constructor stub
    }

    /**
     * @see HttpServlet#doGet(HttpServletRequest request, HttpServletResponse response)
     */
    protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
        // TODO Auto-generated method stub
        response.setContentType("text/html;charset=UTF-8");
        PrintWriter out = response.getWriter();
        String name = request.getParameter("name");
        out.println("<html>");
        out.println("<head>");
        out.println("<title>Hello</title>");
        out.println("</head>");
        out.println("<body>");
        out.println("<h1> Hello!" + name + "! </h1>");
        out.println("</body>");
        out.println("</html>");
        out.close();
    }

    /**
     * @see HttpServlet#doPost(HttpServletRequest request, HttpServletResponse response)
     */
    protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
        // TODO Auto-generated method stub
        doGet(request, response);
    }

}

web.xml(这个文件可有可无的,在用servlet3.0注解的情况下,当里,用了注解,也可以定义另一个URL):

<?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>
      <servlet-name>firstServlet</servlet-name>
      <servlet-class>cc.openhome.HelloServlet</servlet-class>
      <load-on-startup>0</load-on-startup>
  </servlet>

  <servlet-mapping>
      <servlet-name>firstServlet</servlet-name>
      <url-pattern>/first.do</url-pattern>
  </servlet-mapping>
  
</web-app>

注意目录的摆放:

。HelloServlet.java文件位于C:\apache-tomcat-8.0.30\webapps\First\WEB-INF\classes目录下。
。编译命令为:

。C:\apache-tomcat-8.0.30\webapps\First\WEB-INF\classes>javac -cp .;C:\apache-tomcat-8.0.30\lib\servlet-api.jar -d . HelloServlet.java

。生成的HelloServlet.class文件位于:C:\apache-tomcat-8.0.30\webapps\First\WEB-INF\classes\cc\openhome目录下。
。web.xml当然位于C:\apache-tomcat-8.0.30\webapps\First\WEB-INF目录下。

于是用

http://127.0.0.1:8080/First/first.do?name=hello

http://127.0.0.1:8080/First/hello.view?name=hello

都会指定到同一个servlet.

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在tomcat上全手工部署Servlet3.0

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原文地址:http://www.cnblogs.com/aguncn/p/5463383.html

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