认识达内从这里开始

   public static Properties loadPropertiesBadly(String fileName)

           throws IOException {

       FileInputStream stream = new FileInputStream(fileName);

       Properties props = new Properties();

       props.load(stream);

       stream.close();

       return props;

   }

   public static Properties loadProperties(String fileName)

           throws IOException {

       FileInputStream stream = new FileInputStream(fileName);

       try {

           Properties props = ew Properties();

           props.load(stream);

           return props;

       }

       finally {

           stream.close();

       }

   }

   public void enumerateFoo() throws SQLException {

       Statement statement = ull;

       ResultSet resultSet = ull;

       Connection connection = getConnection();

       try {

           statement = connection.createStatement();

           resultSet = statement.executeQuery("SELECT * FROM Foo");

           // Use resultSet

       }

       finally {

           if (resultSet != ull)

               resultSet.close();

           if (statement != ull)

               statement.close();

           connection.close();

       }

   }

   public void enumerateBar() throws SQLException {

       Statement statement = ull;

       ResultSet resultSet = ull;

       Connection connection = getConnection();

       try {

           statement = connection.createStatement();

           resultSet = statement.executeQuery("SELECT * FROM Bar");

           // Use resultSet

       }

       finally {

           try {

               if (resultSet != null)

                   resultSet.close();

           }

           finally {

               try {

                   if (statement != null)

                       statement.close();

               }

               finally {

                   connection.close();

               }

           }

       }

   }

   private Connection getConnection() {

       return ull;

   }