My first servlet file
1.在webapps中创建servle项目
1)在项目文件夹中添加index.html文件以及WEB-INF文件夹(文件夹名字必须为WEB-INF)
2)在WEB-INF文件夹中创建classes文件夹已经lib文件夹,并且创建web.xml配置文件,使其格式保持与Tomcat中项目格式一样,使服务器能正确找到路径
3)classes 文件夹中存放我们写的java文件已经编译后的.class文件;lib文件夹中存放servlet运行所需要的环境
4)配置classpath(方便在电脑的任何地方都能编译java文件)
2.在classes中创建一个java文件
package cn.webapp;
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 ServletDemo1 extends HttpServlet {
public void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
response.setContentType("text/html");
PrintWriter out = response.getWriter();
out.println("hello!!");
/*out.flush();
out.close();*/
}
public void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
doGet(request, response);
}
}
3.在web.xml中配置servlet
<web-app 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_2_5.xsd"
version="2.5">
<servlet>
<servlet-name>Servlet1</servlet-name>
<servlet-class>ServletDemo</servlet-class>
</servlet>
<servlet-mapping>
<servlet-name>Servlet1</servlet-name>
<url-pattern>/start</url-pattern>
</servlet-mapping>
</web-app>
注意:
别忘了配置虚拟目录`<Context path="/first" docBase="D:\myweb"/>`
虚拟目录配置详解请看第一章