使用JavaBean访问数据库

封装访问数据库的JavaBean（DBConnectionManager.java）
package JavaBean;import java.sql.Connection;import java.sql.DriverManager;public class DBConnectionManager {private String driverName = "com.mysql.jdbc.Driver";//驱动程序private String url = "jdbc:mysql:localhost:3306/mydb";//jdbc:mysql:机器IP:3306/数据库名private String user = "root";//数据库登录用户名private String password = "admin";//数据库登录密码public void setDriverName(String newDriverName){driverName = newDriverName;}public String getDriverName(){return driverName;}public void setUrl(String newUrl){url = newUrl;}public String getUrl(){return url;}public void setUser(String newUser){user = newUser;}public String getUser(){return user;}public void setPassword(String newPassword){password = newPassword;}public String getPassword(){return password;}public Connection getConnection(){try{Class.forName(driverName);return DriverManager.getConnection(url, user, password);}catch(Exception e){e.printStackTrace();return null;}}}