Springboot resource下文件（文件夹）读取

SpringBoot打包后无法访问JAR中的路径，所以必须使用resource.getInputStream()，

直接读取文件异常如下：

java.io.FileNotFoundException: class path resource [validator-config/battery.xml] cannot be resolved to absolute file path because it does not reside in the file system: jar:file:/D:/idea_workspace/SVN/mx_vehicle_parts_management/branches/mx_vehicle_parts_management_springboot/mx-vehicle-parts-management-web/target/mx-vehicle-parts-management-web-1.0.0-SNAPSHOT.jar!/BOOT-INF/classes!/validator-config/battery.xml

resource下文件读取：

1.  
   ClassPathResource resource = new ClassPathResource("validator-config/battery.xml");
2.  
   InputStream inputStream = resource.getInputStream();
3.  
   String xmlContent = IOUtils.toString(inputStream, "UTF-8");

resource下文件夹读取：

Resource[] resources = new PathMatchingResourcePatternResolver().getResources("validator-config/*.xml");
for (int i = 0; i < resources.length; i++) {
    InputStream inputStream = resources[i].getInputStream();
    String xmlContent = IOUtils.toString(inputStream, "UTF-8");
    System.out.println("content" + i + "=" + xmlContent);
}