行环境: JDK 5.0 + Tomcat 5.5.4 JDK安装路径: D:\Java\jdk1.5.0_01 Tomcat安装路径:D:\Tomcat 5.5 设置环境变量(控制面板->系统->高级): java_home=D:\Java\jdk1.5.0_01 path=%JAVA_HOME%\bin classpath=.;D:\Java\jdk1.5.0_01\lib\dt.jar;D:\Java\jdk1.5.0_01\lib\tools.jar;D:\Tomcat 5.5\common\lib\servlet-api.jar;D:\Tomcat 5.5\common\lib\mysql-connector-java-3.1.6-bin.jar; 其中D:\Tomcat 5.5\common\lib\servlet-api.jar为Tomcat的servlet API实现,一定要加上,不如无法编译servlet D:\Tomcat 5.5\common\lib\mysql-connector-java-3.1.6-bin.jar;是MySQL的JDBC驱动,connect/J 3.1.6,可到MySQL官方网站下载 Tomcat5.5虚拟目录设定: D:\Tomcat 5.5\conf\Catalina\localhost下新加一test.xml 内容如下: <Context path="/test" docBase="d:/www" reloadable="true" crossContext="true" debug="0" > </Context> d:\www路径将是我们测试网站的根目录,通过http://localhost:8080/test访问该虚拟目录 d:\www下建有目录WEB-INF,下有web.xml设置文件(可参考D:\Tomcat 5.5\webapps\ROOT\WEB-INF\web.xml),classes目录和lib目录 //连接数据库的Java Bean文件名dbconn.java package NinGoo; import java.sql.*; public class dbconn { public dbconn() { } //declare variable private Connection conn = null; ResultSet rs = null; private String server = "127.0.0.1"; private String port = "3306"; private String db = "test"; private String user = "root"; private String pass = "password"; private String drivername="com.mysql.jdbc.Driver"; private String URL="jdbc:mysql://"+server+":"+port+"/"+db+"?user="+user+"&password="+pass; public Connection getConn(){//get database connection try{ Class.forName(drivername).newInstance(); conn = DriverManager.getConnection(URL); } catch(Exception e){ e.printStackTrace(); } return this.conn ; } public ResultSet executeSQL(String str) { try{ Statement stmt = conn.createStatement(); rs = stmt.executeQuery(str); } catch(Exception e){ e.printStackTrace(); } return this.rs; } } 编译javac welcome.java,将编译后的文件welcome.class放到目录D:\www\WEB-INF\classes\NinGoo\下 //调用Java Bean的servlet welcome.java import java.io.*; import javax.servlet.*; import javax.servlet.http.*; import java.sql.*; public class welcome extends HttpServlet { public welcome() { } public void doGet(HttpServletRequest Req,HttpServletResponse Res) throws ServletException,IOException { Res.setContentType("text/html"); Connection conn=null; Statement stmt=null; ResultSet rs = null; try{ NinGoo.database.dbconn myconn =new NinGoo.database.dbconn(); conn = myconn.getConn() ; rs = myconn.executeSQL("select * from test"); //test是MySQL中的一个table PrintWriter out=Res.getWriter(); out.println("<html><head><title>test</title></head>"); out.println("<body>"); while(rs.next()) { out.println(rs.getString(1)); } out.println("successfule!</body></html>"); } catch(Exception e){ } } } 编译javac welcome.java,将编译后的文件welcome.class放到目录D:\www\WEB-INF\classes下 然后修改D:\www\WEB-INF\web.xml,加入如下设置 <servlet> <servlet-name>welcome</servlet-name> <servlet-class>welcome</servlet-class> </servlet> <servlet-mapping> <servlet-name>welcome</servlet-name> <url-pattern>/welcome</url-pattern> </servlet-mapping> 保存后重启Tomcat,然后在浏览器中敲入http://localhost:8080/test/welcome 作者Blog:http://blog.csdn.net/NinGoo/ 相关文章 使用servlet和Java Bean访问MySQL JSP+Java Bean访问MySQL数据库 编写第一个servlet HOW TO:在 SQL Server 实例之间传输登录和密码 jsp连接数据库---Mysql
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