创造系统参数 (实例化参数)

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

public class SystemProperties {

	private Properties qnrSystemProperties = new Properties();
	private static SystemProperties context = null ;

	private SystemProperties() {
		
	}
	private void init(){
		initQnr();
	}
	

	private void initQnr() {
		String path = this.getClass().getResource("/").getPath()
				+ "qnr.properties";

		FileInputStream fin = null;
		try {
			fin = new FileInputStream(path);
			qnrSystemProperties.load(fin);
			fin.close();
		} catch (FileNotFoundException e1) {
			e1.printStackTrace();
			return;
		} catch (IOException e) {
			e.printStackTrace();
			return;
		}

	}
	public synchronized static SystemProperties getSystemPropertie()
	{
		if(context == null)
		{
			context = new SystemProperties();
			context.init();
		}
		return context;
	}
	
	public String getQnrPropertyValue(String property){
		
		return qnrSystemProperties.getProperty(property);
	}

}