java - Spring Boot - 访问资源文件夹内的文件

Question

我正在从主类访问资源文件夹内的文件

File file = new ClassPathResource("remoteUnitsIdsInOldServer.txt").getFile();

我收到此错误:

java.io.FileNotFoundException: class path resource [remoteUnitsIdsInOldServer.txt] cannot be resolved to absolute file path because it does not reside in the file system: jar:file:/Users/lopes/Documents/workspace-sts-3.9.0.RELEASE/telefonicaUtils/target/telefonicaUtils-0.0.1-SNAPSHOT.jar!/BOOT-INF/classes!/remoteUnitsIdsInOldServer.txt

我什至打开jar 文件，文件remoteUnitsIdsInOldServer.txt 就在那里，在类内部

Answer 1

对我来说最简单的解决方案是，

try {
   ClassPathResource classPathResource = new ClassPathResource("remoteUnitsIdsInOldServer.txt");
   byte[] data = FileCopyUtils.copyToByteArray(classPathResource.getInputStream());
   String content = new String(data, StandardCharsets.UTF_8);
} catch (Exception ex) {
  ex.printStackTrace();
}