spring boot – 我可以通过环境读取放在src/main/resources中的json文件吗

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英文:

spring boot - Can I read json files placed in src/main/resources by environment

问题

我有一个Spring Boot项目,其中的JSON文件根据环境放置在src/main/resources目录下,就像这样:
src/main/resources/dataFiles/dev - 包含开发环境的JSON文件
src/main/resources/dataFiles/local - 包含本地环境的JSON文件,诸如此类。

我正在尝试根据活动环境读取JSON文件路径。
也就是模糊地说,类似于:
String path = "dataFiles/${spring.profiles.active}/someFile.json"

  1. 有没有办法使用Spring配置文件来实现这个?如何做?

  2. 如果我想以高效的方式来实现,应该怎么做?

谢谢

英文:

I have a spring boot project with json files placed by environment under src/main/resources like this:
src/main/resources/dataFiles/dev - contains dev json files
src/main/resources/dataFiles/local - contains local json files, and so on.

I am trying to read the json file path depending on the active environment.
i.e. vaguely speaking, something like :
String path = "dataFiles/${spring.profiles.active}/someFile.json"

  1. Is there a way to do this using spring profiles? How to ?

  2. If I were to do this in an efficient way, what would it be ?

Thank you

答案1

得分: 0

可以的,你可以这样做。在你进行读取的组件中,注入Environment

@Autowired
private Environment environment;

然后获取激活的配置文件:

String[] activeProfiles = environment.getActiveProfiles();

请注意,可能有多个配置文件处于激活状态,因此这会返回一个数组。如果你确定只会设置一个激活配置文件,那么可以这样获取文件路径:

String path = "dataFiles/" + activeProfiles[0] + "/someFile.json";

可能更好的方法是为每个配置文件创建一个属性文件,并在配置文件中放置数据路径。例如,对于本地配置文件,创建一个名为application-local.yml的文件,然后在其中添加一个名为datapath的属性,设置为"datafiles/local/"。在读取文件的组件中,你只需注入这个属性:

@Value("${datapath}")
String dataPath;

然后可以像这样读取文件:

String path = dataPath + "someFile.json";
英文:

In short, yes you can do this. In your component that you are doing the read, inject Environment

@Autowired
private Environment environment;

Then get the profiles with

String [] activeProfiles = environment.getActiveProfiles();

Keep in mind that many profiles may be active, so this returns an array. If you are certain that you will only set a single active profile, then you can the get the file as

String path = "dataFiles/" + activeProfiles[0] + "/someFile.json";

Probably a better approach would be to create property file for each of your profiles ad place the data path in the profile. e.g. for the local profile, create a application-local.yml file, and put a property in there called something like datapath, set to "datafiles/local/". In your component that reads the file, then you just have to inject this property

@Value("${datapath}")
String dataPath;

The read your file like

String path = dataPath + "someFile.json";

huangapple
  • 本文由 发表于 2020年4月8日 23:39:41
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