写入和读取.properties文件-优快云博客

本文链接：https://blog.youkuaiyun.com/iteye_15989/article/details/82516835

本文介绍了一种使用Java进行.properties配置文件的写入与读取的方法。通过获取项目的实际路径，利用Properties类来修改和保存配置信息，并从配置文件中读取指定的键值。

摘要生成于 C知道，由 DeepSeek-R1 满血版支持，前往体验 >

写入.properties

String path = ServletActionContext.getServletContext().getRealPath("");
  Properties properties = new Properties();
  try {
        InputStream inputStream = new FileInputStream(path+"/config.properties");
        properties.load(inputStream);
        OutputStream outputStream = new FileOutputStream(path+"/config.properties");
       properties.setProperty("database.url","jdbc:mysql://" + infomation.getDbUrl() + ":3306/"+systemInfomation.getDbName());
       properties.setProperty("database.user",infomation.getDbUser());
       properties.setProperty("database.password", infomation.getDbPassword());
       properties.setProperty("administrator.username", infomation.getAdminName());
        properties.setProperty("administrator.password", infomation.getAdminPassword());
        properties.store(outputStream, "System Base Infomation(Database and Administrator)");
  } catch (Exception e) {
   // TODO: handle exception
   e.printStackTrace();
  }

读取.properties

private String readValue(String key) {
  String path = ServletActionContext.getServletContext().getRealPath("");
  Properties props = new Properties();
  try {
       InputStream in = new BufferedInputStream(new FileInputStream(path+"/config.properties"));
        props.load(in);
        String value = props.getProperty(key);
        return value;
     } catch (Exception e) {
      return null;
     }
  }