JSP连接MySQL

1) 将下载到的驱动mysql-connector-java-5.1.6-bin.jar复制到WEB-INF/lib/下,记得更新启动tomcat
2) 使用范例

//驱动程序名
String driverName=”com.mysql.jdbc.Driver”;

//数据库用户名
String userName=”username”;

//密码
String userPasswd=”password”;

//数据库名
String dbName=”dbname”;

//表名
String tableName=”tablename”;

//联结字符串
String url=”jdbc:mysql://localhost/”+dbName+”?user=”+userName+”&password=”+userPasswd;

Class.forName(“com.mysql.jdbc.Driver”).newInstance();
Connection conn=DriverManager.getConnection(url);
Statement statement = conn.createStatement();
String sql=”SELECT * FROM “+tableName;
ResultSet rs = statement.executeQuery(sql);

//获得数据结果集合
ResultSetMetaData rmeta = rs.getMetaData();

//确定数据集的列数，亦字段数
int numColumns=rmeta.getColumnCount();

// 输出每一个数据值
while(rs.next()) {
out.print(rs.getString(1)+” “);
out.print(“|”);
out.print(rs.getString(2));
out.print(“
“);
}

out.print(“
“);
out.print(“数据库操作成功，恭喜你”);
rs.close();

statement.close();
conn.close();