Properties prop = new Properties();//属性集合对象 FileInputStream fis = new FileInputStream("prop.properties");//属性文件流 prop.load(fis);//将属性文件流装载到Properties对象中 prop.getProperty("key"); //根据指定key获取properties中对应的值 prop.getProperty("key","value"); //根据指定key获取properties中对应的值,如果这个key未定义,则返回默认值vlaue
写入
Properties prop = new Properties();//属性集合对象 prop.setProperty("key1", "value1"); //修改key1的属性值 prop.setProperty("key2", "value2"); //添加一个新的属性key2 //文件输出流 FileOutputStream fos = new FileOutputStream("prop.properties"); //将Properties集合保存到流中 prop.store(fos, "remark"); fos.close();//关闭流
properties配置文件util类
private String fileName = null; private String propKey = null; private URL url = null; Properties properties = new Properties(); /** * 根据url实例化properties * @param url * @throws URISyntaxException * @throws IOException */ public PropUtil(URL url) throws URISyntaxException, IOException { this.url = url; File file =new File(url.toURI()); if (file!=null) { FileInputStream fis = new FileInputStream(file); properties.load(fis); } } /** * 根据文件全路径实例化properties * @param fileName */ public PropUtil(String fileName) { this.fileName = fileName; try { if (fileName!=null&&!fileName.isEmpty()) { InputStream is = new FileInputStream(fileName); properties.load(is); } } catch (FileNotFoundException e) { e.printStackTrace(); } catch (IOException e) { e.printStackTrace(); } } /** * 根据properties的key值获取value * @param key * @return */ public String getPro(String key) { String value = properties.getProperty(key); return value; }
原文：http://www.cnblogs.com/aeolian/p/properties.html