如何更新属性文件? [英] How to update a property file?

问题描述

我正在使用 classLoader 方法加载属性文件.使用它，我能够检索属性的值，但现在我想更新某些属性的值，但我无法做到.请帮忙.这是代码:

i am using the classLoader method to load a property file. Using this, I am able to retrieve the values of properties but now I want to update the values of some properties and i am not able to do it. Please help. Here, is the code:

InputStream inputStream = this.getClass().getClassLoader().getResourceAsStream("PublishDate.properties");

InputStream inputStream = this.getClass().getClassLoader() .getResourceAsStream("PublishDate.properties");

try {
    Properties properties = new Properties();

    try {
       // load the inputStream using the Properties
       properties.load(inputStream);
    }
    catch(Exception e) {
       e.printStackTrace();
    }
    // get the value of the property
    String propValue = properties.getProperty("lastHtlProcessPublishDate");

在这里，在 propValue 中，我从文件中获得了正确的值.我正在更新这个:

here, in propValue i get the right value from file. I am updating this like this:

properties.put("lastHtlProcessPublishDate",dateFormatter.format(new Date()));   
properties.store(new FileOutputStream("PublishDate.properties"), null);

使用此值不会更新，但是当我提供 PublishDate.properties 的完整路径时，它就可以工作了.但是，我不想给出完整的路径，因为路径是动态的.有人知道如何使用一些相对路径来做到这一点.请就此给我建议.

Using this the value doesn't get update but when i provide the complete path for PublishDate.properties then it works. But, I don't want to give the complete path as the path is dynamic. Does someone knows how to do this using some relative path. Please advise me on this.

推荐答案

你可能想试试 commons-configuration 并使用 PropertiesConfiguration.这应该可以满足您的所有需求.

You might want to try commons-configuration and use a PropertiesConfiguration. That should satisfy all your needs.

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