java读取properties文件代码，java读取properties,Java读写Proper

java读取properties文件代码，java读取properties,Java读写Proper

Java读写Properties 文件

private final static String SYS_TEMP_FILE = System              .getProperty("java.io.tmpdir") + "\\9884698793643198z.properties";      private static Map<String, String> fileNames = null;      /**      * get a file path from a system temp file.      *       * @param keyOfFileName      * @return      */      public static final String getAFilePathFromSysTempFile(String keyOfFileName) {          if (null == fileNames) {              fileNames = new HashMap<String, String>();              loadFilePathsFromSysTempFile();          }          String path = fileNames.get(keyOfFileName);          return null == path ? "" : path;      }      private static final boolean loadFilePathsFromSysTempFile() {          try {              if (!new File(SYS_TEMP_FILE).exists()) {                  new File(SYS_TEMP_FILE).createNewFile();                  return true;              }              Properties props = new Properties();              InputStream in = new BufferedInputStream(new FileInputStream(                      SYS_TEMP_FILE));              props.load(in);              Enumeration<?> en = props.propertyNames();              while (en.hasMoreElements()) {                  String key = (String) en.nextElement();                  String prop = props.getProperty(key);                  fileNames.put(key, prop);              }              return true;          } catch (Exception e) {              e.printStackTrace();              return false;          }      }      /**      * save a file path to a system temp file.      *       * @param parameterName      * @param parameterValue      * @return      */      public static final int saveAFilePathToSysTempFile(String parameterName,              String parameterValue) {          Properties prop = new Properties();          try {              InputStream fis = new FileInputStream(SYS_TEMP_FILE);              prop.load(fis);              OutputStream fos = new FileOutputStream(SYS_TEMP_FILE);              prop.setProperty(parameterName, parameterValue);              prop.store(fos, "Update '" + parameterName + "' value");              fileNames.put(parameterName, parameterValue);              return fileNames.size();          } catch (IOException e) {              e.printStackTrace();              return -1;          }      }