Jar类路径资源读取失败，这是从其他可执行jar触发的 [英] Jar classpath resources read failing which is triggerred from other executable jar

问题描述

参考链接：如何从Java jar文件读取资源文件？

我正在尝试使用您的代码库并尝试读取其中的内容 sample.csv 驻留在我的项目目录 src / main / resources 中。我无法读取内容，它说无法读取文件。输出：

I am trying using your code base and trying to read content of sample.csv which is residing in my project directory src/main/resources. I am unable to read the content, it says can not read file. Output:

[无法读取文件： sample.csv ]

//此项在检查 / *后添加到了while循环中，如果它是目录，则跳过它。 * /

//This is added within your while loop after this check /* If it is a directory, then skip it. */

我的意思是，当检测到文件时，接下来是我下面的代码片段被添加来读取文件内容

I mean when file is detected then next is my below code snippet added to read the file content

if(entry.getName().contains("sample.csv")) {
   File f1 = new File("sample.csv");
   if(f1.canRead()) {
      List<String> lines = Files.readAllLines(f1.toPath());
      System.out.println("Lines in file: "+lines.size());
   } else {
      System.out.println("Can not read file: "+entry.getName());
  }
}

有人可以教育我在这里做错什么吗，我如何使其工作？

Can anyone educate me what I am doing wrong here, how can I make it working?

我的要求是：

1. （我的微服务） Service.jar 在其pom中导入 Parser.jar 库。 xml


2. （我的库）- Parser.jar 具有 FnmaUtils-3.2-fieldMapping.csv src / main / resources 目录中的c $ c>文件



3. 有一个 FnmaUtils 类在其构造函数中加载 FnmaUtils-3.2-fieldMapping.csv 的类，该类属于 Parser.jar -在这里我试图读取内容 FnmaUtils-3.2-fieldMapping.csv ，此步骤一直失败，并出现以下错误，尝试了显示的所有可能选项[如何执行我从Java jar文件中读取了资源文件吗？

1. (My micro-service) Service.jar imports Parser.jar library in its pom.xml
2. (My library) - Parser.jar has FnmaUtils-3.2-fieldMapping.csv file in src/main/resources directory

3. There is a FnmaUtils class that loads the FnmaUtils-3.2-fieldMapping.csv within its constructor, this class is part of Parser.jar - Here I am trying to read the content FnmaUtils-3.2-fieldMapping.csv, this step is keep failing with below error, tried all possible options shown in [How do I read a resource file from a Java jar file?

public FnmaUtils() {
   String mappingFileUrl = null;
   try {
       Resource resource = new ClassPathResource("FnmaUtils-3.2-fieldMapping.csv");
       mappingFileUrl = resource.getFile().getPath();
       loadFnmaTemplate(mappingFileUrl);
   } catch (Exception e) {
       e.printStackTrace();
       LOGGER.error("Error loading fnma template file ", e);
   }
}

获取错误：

java.io.FileNotFoundException: class path resource [`FnmaUtils-3.2-fieldMapping.csv`] cannot be resolved to absolute file path because it does not reside in the file system: `jar:file:/home/ravibeli/.m2/repository/com/xxx/mismo/util/fnma-parser32/2018.1.0.0-SNAPSHOT/fnma-parser32-2018.1.0.0-SNAPSHOT.jar!/FnmaUtils-3.2-fieldMapping.csv`
at org.springframework.util.ResourceUtils.getFile(ResourceUtils.java:218)
at org.springframework.core.io.AbstractFileResolvingResource.getFile(AbstractFileResolvingResource.java:52)
at com.xxx.fnma.util.FannieMaeUtils.<init>(FannieMaeUtils.java:41)
at com.xxx.fnma.processor.FNMA32Processor.<init>(FNMA32Processor.java:54)
at com.xxx.fnma.processor.FNMA32Processor.<clinit>(FNMA32Processor.java:43)

这里出了什么问题？

推荐答案

尝试

InputStream in = this.getClass（）。getClassLoader（）
.getResourceAsStream（ SomeTextFile.txt）;

InputStream in = this.getClass().getClassLoader() .getResourceAsStream("SomeTextFile.txt");

请确保资源位于类路径中。

Be sure the resource is in your classpath.

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