如何在JAR Springboot中的FileInputStream中读取资源文件夹的文件

Question

我正在尝试从直接放在资源文件夹中的 json 文件中读取值。我能够成功运行它，在 bootrun & 中没有任何错误。也可以使用下面的代码在 IntelliJ 中成功构建

 try (FileInputStream serviceAccountStream=new FileInputStream("src/main/resources/mockData.json");) {
            credentials = ServiceAccountCredentials.fromStream(serviceAccountStream);
        } catch (FileNotFoundException e) {
            e.printStackTrace();
        } catch (IOException e) {
            e.printStackTrace();
        }
        catch (Exception e){
            System.out.println("Issue with the credential reader"+e.getMessage());

        }

但是，当使用上面的代码创建 JAR 时，我收到异常 fileNotFound

java -jar app-0.0.1-SNAPSHOT-plain.jar

java.io.FileNotFoundException: src\main\resources\mockData.json (The system cannot find the path specified)
        at java.io.FileInputStream.open0(Native Method)
        at java.io.FileInputStream.open(Unknown Source)
        at java.io.FileInputStream.<init>(Unknown Source)
        at java.io.FileInputStream.<init>(Unknown Source)
        at com.exampleBQ.demoBQ.BQConfig.getBQBean(BQConfig.java:31)
    ```

Could someone plz help on how to read the file as FileInputStream  within Jar

Answer 1

当您使用 Springboot 时，您可以使用 Resource 抽象

尝试这样做：-

@Value("classpath:mockData.json")
Resource resourceFile;