dbconn Java_关于java jdbc 数据连接类（dbconnection）
package util;
import java.sql.Connection;
import java.sql.Driver;
import java.sql.DriverManager;
public class DBConnection {
/**
* 连接数据库参数
*/
private String username = "ciss";
private String password = "ciss";
private String driverName = "oracle.jdbc.driver.OracleDriver";
private String url = "jdbc:oracle:thin:@172.29.140.140:1521:ciss";
/**
* 静态实例属性
*/
private static DBConnection dbConn = null;
/**
* 无参构造方法
*/
private DBConnection(){
}
/**
* 静态实例化连接
* @return
*/
public static DBConnection getInstance(){
if(dbConn == null){
dbConn = new DBConnection();
}
return dbConn;
}
/**
* 得到配置文件配置的连接
*
* @return
*/
public Connection getConnection() throws Exception {
try {
return getConnection(driverName, url, username, password);
} catch (Exception e) {
throw new Exception("Fail at create dababase connection!"+ e.getMessage());
}
}
/**
* 得到配置文件配置的连接
*
* @return
*/
public Connection getConnection(String databaseDriver, String url,
String userName, String password) throws Exception {
try {
Driver dbDriver = (Driver) Class.forName(databaseDriver).newInstance();
DriverManager.registerDriver(dbDriver);
return DriverManager.getConnection(url, userName, password);
} catch (Exception e) {
return null;
}
}
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;
}
/**
* @param args
*/
public static void main(String[] args) {
try {
Connection conn = new DBConnection().getInstance().getConnection();
if(conn != null){
System.out.println("连接成功！");
}
}catch(Exception e){
e.printStackTrace();
}
}
}