找不到Java Fileinputstream文件

Question

"Dbconnection.java" "db.properties" the file can not find the file. I show you how I get the following files.

My next project directory.

• src

  • DB

    • DbConnection.java

• db.properties

DbConnection.java

 public class DBConnection {
    public static Connection getConnection() {
        Properties props = new Properties();
        FileInputStream fis = null;
        Connection con = null;
        try {

            fis = new FileInputStream("db.properties");
            props.load(fis);
            out.println(props.getProperty("DB_DRIVER_CLASS"));
            // load the Driver Class
            Class.forName(props.getProperty("DB_DRIVER_CLASS"));

            // create the connection now
            con = DriverManager.getConnection(props.getProperty("DB_URL"),
                    props.getProperty("DB_USERNAME"),
                    props.getProperty("DB_PASSWORD"));
        } catch (IOException | ClassNotFoundException | SQLException e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
        }
        return con;
    }
}

Answer 1

fis = new FileInputStream("db.properties");

This line looks for the file under the "home" directory where you run the application. Its equivalent to "./db.properties". If you don't know the root directory of the application, try add debug using this line new File(".").getAbsolutePath(); then move your properties file there.

Answer 2

In the above code please give the complete path of the file(db.properties). That is, for example, if the file is placed in "E" drive "projectA" folder then the path is

fis = new FileInputStream("E:/projectA/db.properties");// will work