springBoot项目打成jar包给其他项目引用，读取jar里面的资源文件失败

读取项目中的xml文件

代码:

	
		SAXReader reader = new SAXReader();
		Document document = reader.read(ResourceUtils.getFile("classpath:application-validation.xml"));
		Element root = document.getRootElement();
			

但是抛出 FileNotFound异常

java.io.FileNotFoundException: class path resource [application-validation.xml] cannot be resolved to absolute file path because it does not reside in the file system: jar:file:/usr/local/conet/cloud/conet-ds/DS_V200R002B020.jar!/BOOT-INF/classes!/application-validation.xml
	at org.springframework.util.ResourceUtils.getFile(ResourceUtils.java:217)
	at org.springframework.util.ResourceUtils.getFile(ResourceUtils.java:180)
	at com.validation.ValidationConfigParser.parse(ValidationConfigParser.java:39)
	at com.validation.runner.ValidationRunner.run(ValidationRunner.java:28)
	at org.springframework.boot.SpringApplication.callRunner(SpringApplication.java:797)
	at org.springframework.boot.SpringApplication.callRunners(SpringApplication.java:781)
	at org.springframework.boot.SpringApplication.run(SpringApplication.java:335)
	at org.springframework.boot.SpringApplication.run(SpringApplication.java:1255)
	at org.springframework.boot.SpringApplication.run(SpringApplication.java:1243)
	at com.ds.ConetDsApplication.main(ConetDsApplication.java:26)
	at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
	at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
	at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
	at java.lang.reflect.Method.invoke(Method.java:498)
	at org.springframework.boot.loader.MainMethodRunner.run(MainMethodRunner.java:48)
	at org.springframework.boot.loader.Launcher.launch(Launcher.java:87)
	at org.springframework.boot.loader.Launcher.launch(Launcher.java:50)
	at org.springframework.boot.loader.JarLauncher.main(JarLauncher.java:51)

原因：

项目打成jar包后，资源文件也存在于jar包中，文件的绝对路径是jar:file:/D:/sunmnet/JetBrains/workspace/xxx/target/xxx-1.0-SNAPSHOT.jar!/BOOT-INF/classes!/XXX.cfg但在运行过程中，spring是不允许直接访问jar包内的文件的，所以会报错。

解决：

采用读取流的方式访问文件：

	ClassPathResource resource = new ClassPathResource("application-validation.xml");
	InputStream inputStream = resource.getInputStream();
	Document document = reader.read(inputStream);
	Element root = document.getRootElement();