用CashFilter实现页面级缓存实践

王朝other·作者佚名  2008-05-31
窄屏简体版  字體: |||超大  

1.mysql在本地localhost的test数据库 建person表,暂以字段id,name,passWord ,表中可输入一行值.

2.建类 DAOUtil

import Java.sql.Connection;

import java.sql.DriverManager;

public class DAOUtil {

public DAOUtil() {

}

public static Connection getConn() {

Connection conn = null;

String db_url = "jdbc:mysql://127.0.0.1:3306/test?useUnicode=true&characterEncoding=gb2312";

String db_user = "root";

String db_password= "admin";

String db_driver = "com.mysql.jdbc.Driver";

try {

Class.forName(db_driver);

conn = DriverManager.getConnection(db_url, db_user, db_password);

} catch (Exception ex) {

ex.printStackTrace();

}

return conn;

}

/**

* dbclose

* 关闭Connection,Statement

* @param conn Connection

* @param stmt Statement

*/

public static void dbclose(Connection conn, Statement stmt) {

try {

if (stmt != null)

stmt.close();

} catch (Exception e) {

e.printStackTrace();

}

try {

if (conn != null)

conn.close();

} catch (Exception e) {

e.printStackTrace();

}

}

}

3.建类 PersonDAO

import java.util.*;

import java.sql.Connection;

import java.sql.Statement;

import java.sql.ResultSet;

public class PersonDAO {

static PersonDAO pdao;

public static PersonDAO getInstance() {

if (pdao == null) {

synchronized (PersonDAO.class) {

pdao = new PersonDAO();

}

}

return pdao;

}

 
 
 
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