Servlet入门

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package ts.cn;

import java.io.*;

import javax.servlet.*;

import javax.servlet.ServletException;

import javax.servlet.http.*;

public class HelloSevlet extendsHttpServlet{

publicvoid service(HttpServletRequest request,HttpServletResponse response)throwsServletException,IOException{

response.setContentType("text/html;charset=UTF-8");

request.setCharacterEncoding("UTF-8");

PrintWriterout =response.getWriter();

out.println("<html>");

out.println("<body>");

out.println("<p>hello!</p>");

out.println("</body>");

out.println("</html>");

}

Web.xml配置信息：

<?xmlversion="1.0"encoding="UTF-8"?>

<web-appversion="2.5"

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">

<servlet-name>

HelloServlet

</servlet-name>

<servlet-class>ts.cn.HelloSevlet</servlet-class>

</servlet>

<servlet-mapping>

<servlet-name>HelloServlet</servlet-name>

<url-pattern>/ts/cn/HelloServlet</url-pattern>

</servlet-mapping>

</web-app>

注意的两点：

<url-pattern>/ts/cn/HelloServlet</url-pattern>这个配置和访问时路径有关系这里的访问路径为：http://localhost:8080/工程名/ts/cn/HelloServlet 如果这个配置成这样<url-pattern>/HelloServlet</url-pattern>访问

路径则为http://localhost:8080/工程名/HelloServlet

就可以了

需要加入的jar包有javax.servlet.jar