jdbc (java.util.)Properties file
This code snippet reads from a file named 'database.properties', however, I would like to know what format should the properties be written?
I'm trying to connect to a postgre database, hence, included file named postgresql-8.3-604.jdbc4.jar within the project.
:confused:
Code:
import java.sql.*;
import java.io.*;
import java.util.*;
/**
This program tests that the database and the JDBC
driver are correctly configured.
*/
class TestDB
{
public static void main (String args[])
{
try
{
runTest();
}
catch (SQLException ex)
{
while (ex != null)
{
ex.printStackTrace();
ex = ex.getNextException();
}
}
catch (IOException ex)
{
ex.printStackTrace();
}
}
/**
Runs a test by creating a table, adding a value, showing the table contents, and
removing the table.
*/
public static void runTest()
throws SQLException, IOException
{
Connection conn = getConnection();
try
{
Statement stat = conn.createStatement();
stat.execute("CREATE TABLE Greetings (Message CHAR(20))");
stat.execute("INSERT INTO Greetings VALUES ('Hello, World!')");
ResultSet result = stat.executeQuery("SELECT * FROM Greetings");
result.next();
System.out.println(result.getString(1));
stat.execute("DROP TABLE Greetings");
}
finally
{
conn.close();
}
}
/**
Gets a connection from the properties specified
in the file database.properties
@return the database connection
*/
public static Connection getConnection()
throws SQLException, IOException
{
Properties props = new Properties();
FileInputStream in = new FileInputStream("[B]database.properties[/B]");
props.load(in);
in.close();
String drivers = props.getProperty("jdbc.drivers");
if (drivers != null)
System.setProperty("jdbc.drivers", drivers);
String url = props.getProperty("jdbc.url");
String username = props.getProperty("jdbc.username");
String password = props.getProperty("jdbc.password");
return DriverManager.getConnection(url, username, password);
}
}
References
1. Core Java Vol II 7th Ed.
2. The API
jdbc (java.util.)Properties file
Thanks, however, you would need to document what I don't know and what you know so it becomes easy for me.
:)
