java中propertyNames() 怎么用,请帮帮忙举个例子,小女子再此多谢!

java中propertyNames() 怎么用,请帮帮忙举个例子,小女子再此多谢!

import java.io.File;
import java.io.FileInputStream;
import java.io.FileNotFoundException;
import java.io.IOException;
import java.util.Enumeration;
import java.util.Properties;

public class PropertiesTest
{

public static void initFile()
{

File file = new File("D://a.properties");
FileInputStream fis = null;
try
{

fis = new FileInputStream(file);

Properties prop = new Properties();

prop.load(fis);

Enumeration enums = prop.propertyNames();
while (enums.hasMoreElements())
{

String key = (String) enums.nextElement();

String value = prop.getProperty(key);

System.out.println(key+"----"+value);
}
} catch (FileNotFoundException e)
{
// TODO Auto-generated catch block
e.printStackTrace();
} catch (IOException e)
{
// TODO Auto-generated catch block
e.printStackTrace();
} finally
{
if(fis!=null)
try {
fis.close();
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}
}
public static void main(String[] args)
{

PropertiesTest.initFile();
}
}

结果是:
UserPass----
URl----jdbc:microsoft:sqlserver://localhost:1433;databasename=employee
Driver----com.microsoft.jdbc.sqlserver.SQLServerDriver
UserName----sa

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