用Java实现数据库操纵系统[Java编程]

我们在做信息系统的时刻,都要拜候数据库,我近来接办一个项目,项目组决意利用Java编写,我负责数据层的计划和编码,为了提高代码的重用性和提高项目的开辟效率.我们开辟了一个通用的数据库衔接和完成基本操作的类库,个人认为这个类在做MIS系统时还是有一定的代价,所以总结出来,介绍给大家.

衔接工厂,实现了DataSource接口

package skydev.modules.data;
import java.sql.*;
import javax.sql.DataSource;
import java.io.PrintWriter;
public class ConnectionFactory implements DataSource {
private String userName;
private String password;
private String driverName;
private String url;
private java.sql.Connection connection;
/**
* 按照设置的衔接参数成立一个新的衔接实例
* @return
*/
private Connection getNewConnection() {
try {
this.connection.close(); //试图关闭衔接
}
finally {
this.connection = null; //释放衔接
try {
Class.forName(this.driverName); //加载驱动程序
//DriverManager.registerDriver(driver);
try {
this.connection = DriverManager.getConnection(this.url, this.userName,
this.password);
}
catch (SQLException e) {
throw e;
}
}
finally {
return this.connection; //返回新成立的衔接
}
}
}
public String getUserName() {
return userName;
}
public void setUserName(String userName) {
this.userName = userName;
}
public String getPassword() {
return password;
}
public void setPassword(String password) {
this.password = password;
}
public String getDriverName() {
return driverName;
}
public void setDriverName(String driverName) {
this.driverName = driverName;
}
public String getUrl() {
return url;
}
public void setUrl(String url) {
this.url = url;
}
public java.sql.Connection getConnection() {
if (connection != null) {
try {
if (connection.isClosed()) {
connection = null;
getNewConnection();
}
}
catch (SQLException ex) {
}
}
if (connection == null) { //没有设置衔接则成立一个衔接
getNewConnection();
}
return connection;
}
public Connection getConnection(String userName, String password) throws
SQLException {
this.setUserName(userName);
this.setPassword(password);
return getConnection();
}
public PrintWriter getLogWriter() {
return null;
}
public void setLogWriter(PrintWriter printWriter) {
}
public void setLoginTimeout(int int0) {
}
public int getLoginTimeout() {
return 0;
}
}

　　以上是“用Java实现数据库操纵系统[Java编程]”的内容，如果你对以上该文章内容感兴趣，你可以看看七道奇为您推荐以下文章：