Java读取配置文件 java配置文件读取

1.新建application.properties

name=solin

 2.使用以下程序获取配置信息

InputStream inputStream = this.getClass().getClassLoader().getResourceAsStream("application.properties");   
  Properties p = new Properties();   
  try {   
   p.load(inputStream);   
  } catch (IOException e1) {   
   e1.printStackTrace();   
  }   
System.out.println("name:"+p.getProperty("name"));  

3.完善获取配置

public class Config {
	private static final Log logger = LogFactory.getLog(Config.class);
	private static HashMap<String, Properties> propMap = new HashMap();

	private static Properties loadProperties(String fileName) {
		InputStream in = null;
		if (in == null) {
			in = Config.class.getClassLoader().getResourceAsStream(fileName + ".properties");
			if (logger.isInfoEnabled()) {
				logger.info("load properties file:" + fileName + ".properties");
			}
		}
		Properties prop = null;
		try {
			if (in != null) {
				prop = new Properties();
				prop.load(in);
			}
		} catch (IOException e) {
			e.printStackTrace();
			logger.error(e);
		}
		return prop;
	}

	public static String getProperty(String key, String fileName) {
		Properties prop = null;
		prop = (Properties) propMap.get(fileName);
		if (prop == null) {
			synchronized (Config.class) {
				if (propMap.get(fileName) == null) {
					prop = loadProperties(fileName);
					if (prop != null) {
						propMap.put(fileName, prop);
					}
				} else {
					prop = (Properties) propMap.get(fileName);
				}
			}
		}
		if (prop == null) {
			return "";
		}
		String str = prop.getProperty(key);
		return str == null ? "" : str;
	}

	public static void main(String[] args) {
		System.out.println("key:" + getProperty("name", "application"));
	}

}