// （1）使用Class.forName來導入drive            Class.forName("Oracle.jdbc.driver.OracleDriver");            // (2)使用DriverManager.getconnection(url,用戶名，密碼)建立連接返回類型是Connection類型            conn = DriverManager.getConnection(                    "jdbc:oracle:thin:@localhost:1521:orcl", "news", "news");

將以上信息放入資源文件，重復使用

database.PRoperties

jdbc.driver=oracle.jdbc.driver.OracleDriverjdbc.url=jdbc:oracle:thin:@localhost:1521:orcljdbc.uname=newsjdbc.upwd=news

configManager.class

package pb.until;import java.io.IOException;import java.io.InputStream;import java.util.Properties;public class ConfigManager {    ///聲明靜態變量    private static ConfigManager confingManager ;    //聲明靜態變量Properties    private static Properties properties;        private ConfigManager(){        //獲取文件路徑        String configfile="database.properties";        //聲明新的Properties對象        properties = new Properties();        InputStream is = ConfigManager.class.getClassLoader().getResourceAsStream(configfile);        //使用load方法來讀取文件        try {            properties.load(is);            is.close();        } catch (IOException e) {            // TODO Auto-generated catch block            e.printStackTrace();        }    }        //創建單個例對象    public static ConfigManager getintance(){        if(confingManager==null){            confingManager=new ConfigManager();        }        return confingManager;    }    public String getvalue(String key){        return properties.getProperty(key);    }}

String driver=ConfigManager.getintance().getvalue("jdbc.driver");        String url =ConfigManager.getintance().getvalue("jdbc.url");        String uname =ConfigManager.getintance().getvalue("jdbc.uname");        String upwd =ConfigManager.getintance().getvalue("jdbc.upwd");        try {            // （1）使用Class.forName來導入drive            Class.forName(driver);            // (2)使用DriverManager.getconnection(url,用戶名，密碼)建立連接返回類型是Connection類型            conn = DriverManager.getConnection(url, uname, upwd);