轻松读取项目中properties文件的方式

import java.io.IOException;
import java.io.InputStream;
import java.util.Properties;
/**
 * 读取ipconfig.properties
 * @data 2017-12-25
 * @author LQ
 */
public class IpConfigUtil {


    private static Properties configfile = null;


    static {
        InputStream in = IpConfigUtil.class.getClassLoader()
                .getResourceAsStream("ipconfig.properties");
        configfile = new Properties();
        try {
            configfile.load(in);
            in.close();
        } catch (IOException e) {
            System.out.println("No config.properties defined error");
        }finally {
            try {
                if (in != null) {
                    in.close();
                }
            } catch (IOException e) {
                in = null;
            }
        }
    }


    public String getPropertiesByKey(String _key) {
        return configfile.getProperty(_key);
    }


}import java.io.IOException;
import java.i