连接mysql数据库的javabean，修改url数据库连接字符串和驱动程序加载代码，即可成为通用的数据库连接BEAN。
package com.common;
import java.sql.*;
public class DataBaseConn {
public Connection conn = null;
public void createConn(){
String url = "jdbc:mysql://localhost:3306/employeeDb";
String username = "root";// 数据库用户名
String password = "root";// 数据库密码
if(conn == null){
try{ Class.forName("com.mysql.jdbc.Driver");
conn = DriverManager.getConnection(url,username,password);
}catch(Exception e){e.toString();}
}
}
public Connection getConn(){
if(conn == null){ createConn();}
return conn;
}
public void closeConn(){
if(conn != null){
try {
conn.close();
conn = null;
} catch (Exception e) { e.printStackTrace(); }
}
}
public ResultSet executeQuery(String sql) {
ResultSet rs = null;
if (conn == null) {createConn();}
try {
Statement stmt = conn.createStatement();
rs = stmt.executeQuery(sql);
} catch (Exception e) { e.printStackTrace(); }
return rs;
}
public void executeUpdate(String sql) {
if (conn == null) {createConn(); }
try { Statement stmt = conn.createStatement(ResultSet.TYPE_SCROLL_SENSITIVE,ResultSet.CONCUR_READ_ONLY);
stmt.executeUpdate(sql);
} catch (Exception e) { e.printStackTrace(); }
}
}
再操作数据库，通过usebean动作标记调用该javabean即可，希望对你有所帮助。
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