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Properties props = new Properties();   
props.load(new FileInputStream("db.properties"));
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blog.propertiesÎļþÈçÏÂ
dbdriver=oracle.jdbc.driver.OracleDriver
dburl=jdbc:oracle:thin:@127.0.0.1:1521:ora92
dbuser=blog
dbpwd=blog
--------------
public class Config {
public Config() {
    this.initDBConfig();
}
public String DBdriver;
public String DBuser;
public String DBpwd;
public String DBurl;
private void initDBConfig() {
    try {
      ResourceBundle bundle = ResourceBundle.getBundle("blog");
      DBdriver = bundle.getString("dbdriver");
      DBurl = bundle.getString("dburl");
      DBuser = bundle.getString("dbuser");
      DBpwd = bundle.getString("dbpwd");
    }
    catch (Exception ex) {
      ex.printStackTrace();
    }
}
}
----------------
public class DAO {
public DAO() {
}
public Connection getConnection() {
    Connection conn = null;
    Config config = new Config();
    String DBdriver = config.DBdriver;
    String DBuser = config.DBuser;
    String DBpwd = config.DBpwd;
    String DBurl = config.DBurl;
    try {
      Class.forName(DBdriver);
      conn = DriverManager.getConnection(DBurl, DBuser, DBpwd);
    }
    catch (Exception ex) {
      System.out.println("********************");
      System.out.println("²»Äܵõ½Êý¾Ý¿âÁ¬½Ó");
      System.out.println("DBdriv