import ="java.util.*"
import ="java.io.*"
contentType="text/html; charset=gb2312"
%>
使用JSP读取Mysql数据库
String host="localhost"; //数据库主机
String database="pinghui"; //数据库名
String user="test"; //用户名
String pass=""; //口令
%>java.sql.Statement sqlStmt; //语句对象
java.sql.ResultSet sqlRst; //结果集对象
//登记JDBC驱动对象
Class.forName ("org.gjt.mm.mysql.Driver").newInstance ();
//连接数据库
sqlConn= java.sql.DriverManager.getConnection ("jdbc:mysql://"+host+"/"+database,user,pass);
//创建语句对象
sqlStmt=sqlConn.createStatement (java.sql.ResultSet.TYPE_SCROLL_INSENSITIVE,java.sql.ResultSet.CONCUR_READ_ONLY);
//执行Sql语句
String sqlQuery="select count(*) from comment";
sqlRst=sqlStmt.executeQuery (sqlQuery);
sqlRst.next();
int count=sqlRst.getInt(1); //取得总的留言记录数
sqlQuery="select * from comment order by userid desc;";
sqlRst=sqlStmt.executeQuery (sqlQuery); //执行SQL语句
%>
总共有条留言
ID | 昵称 | 性别 | 地址 | IP地址 | 邮编 | Oicq | ICQ | 电话 | 留言 | 时间 |
//关闭结果集对象
sqlRst.close();
//关闭语句对象
sqlStmt.close ();
//关闭数据库连接
sqlConn.close();
%>

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Adding MySQL users through the PHP web interface can use MySQLi extensions. The steps are as follows: 1. Connect to the MySQL database and use the MySQLi extension. 2. Create a user, use the CREATEUSER statement, and use the PASSWORD() function to encrypt the password. 3. Prevent SQL injection and use the mysqli_real_escape_string() function to process user input. 4. Assign permissions to new users and use the GRANT statement.

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