使用可执行Jar时未找到Spring-Boot资源

Question

我再次面临一个奇怪的问题，希望这里有人能帮助我。

模块的Pom如下所示：

<project>
    <modelVersion>4.0.0</modelVersion>

    <parent>
        <groupId>at.company.bbsng</groupId>
        <artifactId>bbsng-import</artifactId>
        <version>0.1.0-SNAPSHOT</version>
    </parent>

    <artifactId>bbsng-import-backend</artifactId>
    <name>bbsng-import-backend</name>

    <properties>
        <start-class>at.company.bbsng.dataimport.Application</start-class>
    </properties>


    <dependencies>

        <!-- SPRING ... -->
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-batch</artifactId>
            <!-- EXCLUDE LOGBACK AND USE LOG4J -->
            <exclusions>
                <exclusion>
                    <artifactId>spring-boot-starter-logging</artifactId>
                    <groupId>org.springframework.boot</groupId>
                </exclusion>
            </exclusions>
        </dependency>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-log4j</artifactId>
        </dependency>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-test</artifactId>
            <scope>test</scope>
        </dependency>

        <!-- COMMONS ... -->

        ...

    </dependencies>

    <build>
        <plugins>
            <plugin>
                <groupId>org.springframework.boot</groupId>
                <artifactId>spring-boot-maven-plugin</artifactId>
                <executions>
                    <execution>
                        <goals>
                            <goal>repackage</goal>
                        </goals>
                    </execution>
                </executions>
            </plugin>
        </plugins>
    </build>

</project>

CSV路径-文件在propery files中配置如下：

# EXAMPLE PATH
csv.path=config/csv/

java配置文件的部分如下：

  ...

  @Value("${csv.path}")
  private String csvExamplePath;

  @Bean
  public Resource addressResource() {
    return new ClassPathResource(csvExamplePath + CSV_ADDRESS);
  }

    ...

\config\csv\

Caused by: java.io.FileNotFoundException: class path resource [config/csv/Company.csv] cannot be resolved to absolute file path because it does not reside in th
e file system: jar:file:/C:/Development/Projekte/bbsng/trunk/import/backend/target/bbsng-import-backend-0.1.0-SNAPSHOT.jar!/config/csv/Company.csv
        at org.springframework.util.ResourceUtils.getFile(ResourceUtils.java:207)
        at org.springframework.core.io.AbstractFileResolvingResource.getFile(AbstractFileResolvingResource.java:52)
        at at.compax.bbsng.dataimport.app.source.company.CompanyGenerator.init(CompanyGenerator.java:28)
        at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
        at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)
        at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
        at java.lang.reflect.Method.invoke(Unknown Source)
        at org.springframework.beans.factory.annotation.InitDestroyAnnotationBeanPostProcessor$LifecycleElement.invoke(InitDestroyAnnotationBeanPostProcessor.java

Answer 1

好吧，我已经找到真正的问题和解决办法了。

首先，应用程序使用csv文件的正确路径，但在使用可执行jar时还有另一个问题，我在下面的链接中找到了这个问题。StackOverflow-链接

在发布可执行jar之前，我使用了以下获取CSV-File的解决方案（问题是getFile（））：

final List<String> resourceLines = FileReadUtils.readLines(specialisationResource.getFile());
for (final String line : resourceLines) {
  data.add(getNewTransientSpecialisation(line));
}

final InputStream inputStream = specialisationResource.getInputStream();
final BufferedReader bufferedReader = new BufferedReader(new InputStreamReader(inputStream));

String line;
while ((line = bufferedReader.readLine()) != null) {
    data.add(getNewTransientSpecialisation(line));
}

final List<String> resourceLines = IOUtils.readLines(specialisationResource.getInputStream());
for (final String line : resourceLines) {
    data.add(getNewTransientSpecialisation(line));
}

所以请记住，不要使用File（）获取资源，始终使用stream从一开始就避免了这个问题：-）

希望能帮到别人。