Servlet

servlet hello world 要运行Servlet，则需要JSP/Servlet container，建议初学者用Tomcat. Tomcat 7.0.xx: http://mirror.bit.edu.cn/apache/tomcat/tomcat-7/v7.0.xx/bin/apache-tomcat-7.0.xx.tar.gz 然后把这个压缩包解压到: /home/wiloon/opt/apache-tomcat-7.0.xx 然后再配置环境变量；添加三个系统变量: JAVA_HOME="/opt/jvm/jdk1.7.0" TOMCAT_HOME="/home/wiloon/program/apache-tomcat-7.0.xx" CLASSPATH: %JAVA_HOME%/lib;%TOMCAT_HOME%/lib Tomcat的环境变量就配置完毕了，下面检验Tomcat是否能够运行: 转到/home/wiloon/program/apache-tomcat-7.0.xx/bin这个目录，运行sh startup.sh，在浏览器中输入http://localhost:8080，出现欢迎界面，则表示Tomcat没问题了。然后写入你的第一个Servlet。 import java.io.*; import javax.servlet.*; import javax.servlet.http.*; public class HelloWorld extends HttpServlet { public void doGet(HttpServletRequest request,HttpServletResponse response)throws ServletException,IOException { response.setContentType("text/html"); PrintWriter out = response.getWriter(); out.println("＜html＞＜head＞＜title＞"); out.println("This is my first Servlet"); out.println("＜/title＞＜/head＞＜body＞"); out.println("＜h1＞Hello,World!＜/h1＞"); out.println("＜/body＞＜/html＞"); } } 然后照样用javac HelloWorld.java来编译这个文件，如果出现无法import javax.servlet.* ...