Servlet访问数据库mysql

JDBC驱动的种类型：

1、JDBC-ODBC桥

2、部分本地API，部分java驱动程序

3、JDBC网络纯java程序

4、本地协议纯java驱动程序

在doc窗口上使用mysql点击打开链接，进行建表， 加入数据。再通过servlet来在网上访问。

import java.io.IOException;
import java.io.PrintWriter;
import java.sql.Connection;
import java.sql.DriverManager;
import java.sql.ResultSet;
import java.sql.SQLException;
import java.sql.Statement; 
import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse; 
/**
 * 在Servlet中直接连接数据库，并查询显示信息
 * 每个application都应该有自己的驱动包，放在各自项目的WEB-INF\lib\目录下
 * @author jukey
 *
 */
public class ShowRs extends HttpServlet { 
    protected void doGet(HttpServletRequest request, HttpServletResponse response) 
    		throws ServletException, IOException {
        
        Connection conn = null;
        Statement stmt = null;
        ResultSet rs = null;
        
        response.setContentType("text/html;charset=gbk");
        PrintWriter out = response.getWriter();
        out.println("<table border=1>");
        out.println("<tr><td>Content:</td></tr>"); 
        try {
            Class.forName("com.mysql.jdbc.Driver");
            conn = DriverManager.getConnection("jdbc:mysql://localhost/mybase?user=root&password=123456");
            stmt = conn.createStatement();
            String sql = "select * from article";
            rs = stmt.executeQuery(sql);
            while(rs.next()) {
                out.println("<tr>");
                out.println("<td>" + rs.getString("title") + "</td>");
                out.println("</tr>");
            }
        } catch (SQLException ex) {
            ex.printStackTrace();
        } catch (Exception ex) {
            ex.printStackTrace();
        } finally {
             if (rs != null) {
                 try {
                     rs.close();
                     rs = null;
                 } catch (SQLException sqlEx) { 
                     sqlEx.printStackTrace();
                 }
             }
             if (stmt != null) {
                 try {
                     stmt.close();
                     stmt = null;
                 } catch (SQLException sqlEx) { 
                     sqlEx.printStackTrace();
                 }
             }
             if (conn != null) {
                 try {
                     conn.close();
                     conn = null;
                 } catch (SQLException sqlEx) { 
                     sqlEx.printStackTrace();
                 }
             }
        }
    } 
} 

配置web.xml

<servlet>
	
	<servlet-name>ShowRs</servlet-name>
	
	<servlet-class>ShowRs</servlet-class>

</servlet>

<servlet-mapping>
	
	<servlet-name>ShowRs</servlet-name>
	
	<url-pattern>/ShowRs</url-pattern>

</servlet-mapping>