Java通过配置文件连接Mysql和Oracle数据库实例详解

Java通过配置文件连接Mysql和Oracle数据库实例详解
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配置文件： db.properties

#Mysql parameter
mysqldriver=com.mysql.jdbc.Driver
mysqlurl=jdbc:mysql://127.0.0.1:3306/database
mysqluser=username
mysqlpassword=password

#Oracle Parameter
oracledriver=oracle.jdbc.driver.OracleDriver
oracleurl=jdbc:oracle:thin:@127.0.0.1:1521:ORCL
oracleuser=username
oraclepassword=password

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package service;
import java.io.File;
import java.io.FileInputStream;
import java.io.IOException;
import java.sql.Connection;
import java.sql.DriverManager;
import java.sql.SQLException;
import java.util.Properties;
public class DBManagerService {
private Properties prop;
private Connection conn;

public Connection getMyslqConnection(){
prop = new Properties();
try {
prop.load(new FileInputStream("config"+File.separator+"db.properties"));
// prop.load(this.getClass().getClassLoader().getResourceAsStream("config/db.properties"));
} catch (IOException e1) {
e1.printStackTrace();
}

/*two method to connect to Mysql
*
* String url ="jdbc:mysql://localhost/jeff?user=boehf&password=boehf&useUnicode=true&characterEncoding=8859_1";
* conn = DriverManager.getConnection(url);
*/

String driver = prop.getProperty("mysqldriver");
String url = prop.getProperty("mysqlurl");
String user = prop.getProperty("mysqluser");
String passwd = prop.getProperty("mysqlpassword");
try {
Class.forName(driver);
conn = DriverManager.getConnection(url, user, passwd);
System.out.println("Mysql Connected Success!");
} catch (SQLException e) {
System.err.println("sql exception:" + e.getMessage());
} catch (ClassNotFoundException e) {
System.err.println("Driver Class not found " + e.getMessage());
}
return conn;
}

public Connection getMOracleConnection(){
prop = new Properties();
try {
prop.load(new FileInputStream("config"+File.separator+"db.properties"));
} catch (IOException e1) {
e1.printStackTrace();
}
String driver = prop.getProperty("oracledriver");
String url = prop.getProperty("oracleurl");
String user = prop.getProperty("oracleuser");
String passwd = prop.getProperty("oraclepassword");
try {
Class.forName(driver);
conn = DriverManager.getConnection(url, user, passwd);
System.out.println("Oracle Connected Success!");
} catch (SQLException e) {
System.err.println("sql exception:" + e.getMessage());
} catch (ClassNotFoundException e) {
System.err.println("Driver Class not found " + e.getMessage());
}
return conn;
}

/**
* 关闭数据库连接
*
* @param connect
*/
public void closeConnection(Connection conn) {
try {
if (conn != null) {
/** 判断当前连接连接对象如果没有被关闭就调用关闭方法 */
if (!conn.isClosed())

{
conn.close();
}
}
} catch (Exception ex) {
ex.printStackTrace();
}
}
}
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