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>