Question

使用spring boot构建一个jar，其中一个类需要从类路径中读取文本文件。这是一段代码..

InputStream fp = this.getClass().getClassLoader().getResourceAsStream("install/release-2.2.0-SNAPSHOT/schema/Create-Index.xml");

问题是，fp正在返回＆＃39; null＆＃39;，并且它的使用会抛出Null Pointer Exception。

这是jar内容..

 **jar tvf target/orchestrationservice.jar | grep install**
     0 Fri Feb 10 19:19:06 PST 2017 BOOT-INF/classes/install/
     0 Fri Feb 10 19:19:06 PST 2017 BOOT-INF/classes/install/release-3.0.0/
     0 Fri Feb 10 19:19:06 PST 2017 BOOT-INF/classes/install/release-3.0.0/predecessors/
     0 Fri Feb 10 19:19:06 PST 2017 BOOT-INF/classes/install/release-3.0.0/predecessors/release-2.2.0/
     0 Fri Feb 10 19:19:06 PST 2017 BOOT-INF/classes/install/release-3.0.0/schema/
   633 Fri Feb 10 19:19:06 PST 2017 BOOT-INF/classes/install/release-3.0.0/predecessors/release-2.2.0/orchestration_upgrade_set_version.cql
   910 Fri Feb 10 19:19:06 PST 2017 BOOT-INF/classes/install/release-3.0.0/predecessors/release-2.2.0/Upgrade-Index.xml
   706 Fri Feb 10 19:19:06 PST 2017 BOOT-INF/classes/install/release-3.0.0/Prod-Index.xml
  1108 Fri Feb 10 19:19:06 PST 2017 BOOT-INF/classes/install/release-3.0.0/schema/Create-Index.xml
   465 Fri Feb 10 19:19:06 PST 2017 BOOT-INF/classes/install/release-3.0.0/schema/orchestration_3.0_fresh_install_schema.cql
  1356 Fri Feb 10 19:19:06 PST 2017 BOOT-INF/classes/install/release-3.0.0/schema/orchestration_3.0_fresh_install_tables.cql
    28 Fri Feb 10 19:19:06 PST 2017 BOOT-INF/classes/install/release-3.0.0/schema/orchestration_3.0_fresh_install_tables_data.cql
   651 Fri Feb 10 19:19:06 PST 2017 BOOT-INF/classes/install/release-3.0.0/schema/orchestration_3.0_fresh_install_tables_idx.cql
   296 Fri Feb 10 19:19:06 PST 2017 BOOT-INF/classes/install/release-3.0.0/schema/orchestration_3.0_set_version.cql
  2135 Fri Feb 10 19:19:06 PST 2017 BOOT-INF/classes/install/StepExecutionOrder.xml
   128 Fri Feb 10 19:19:06 PST 2017 BOOT-INF/classes/install/UpgradePaths.xml

在切换Spring Boot版本后，引入了BOOT-INF / classes / **。之前它只是/ classes / **，资源加载得很好。

请帮助我，如何使用BOOT-INF读取资源？

Answer 1

这就是你要找的东西：

＆＃34;安装/释放-2.2.0-SNAPSHOT /模式/创建-INDEX.XML＆＃34;

这是你的jar文件中的内容：

＆＃34; BOOT-INF /类/安装/释放-3.0.0 /模式/创建-INDEX.XML＆＃34;

此外，在使用Spring时，从类路径获取文件时使用org.springframework.core.io.ClassPathResource会更加惯用。

类加载器资源作为流到＆＃39; Null＆＃39;，Spring启动微服务jar BOOT-INF

1 个答案: