java Properties (属性集)

 加载Properties

Properties downloadLog = new Properties();
try {
                   //加载logFile文件
            downloadLog.load(new FileReader(logFile));
        } catch (IOException e) {
            e.printStackTrace();
        }

 设置和读取属性

final String uri = httpServletRequest.getRequestURI();
String property = downloadLog.getProperty(uri);
                if (property == null) {
                    downloadLog.setProperty(uri, "1");
                } else {
                    int count = 0;
                    try {
                        count = Integer.parseInt(property);
                    } catch (NumberFormatException e) {
// silent
                    }
                    count++;
                    downloadLog.setProperty(uri, Integer.toString(count));
                }