這個錯誤是以爲編譯代碼的jdk版本高，而運行的jdk版本過低導致啓動報錯
major.minor是 Java Class 的主版本號和次版本號：
JDK1.5 對應爲Unsupported major.minor version 49.0
JDK1.6 對應爲Unsupported major.minor version 50.0
JDK1.7 對應爲Unsupported major.minor version 51.0
JDK1.8 對應爲Unsupported major.minor version 52.0
java.lang.UnsupportedClassVersionError: com/taobao/hsf/app/spring/util/annotation/EnableHSF : Unsupported major.minor version 52.0
at java.lang.ClassLoader.defineClass1(Native Method) ~[na:1.7.0_79]
at java.lang.ClassLoader.defineClass(ClassLoader.java:800) ~[na:1.7.0_79]
at java.security.SecureClassLoader.defineClass(SecureClassLoader.java:142) ~[na:1.7.0_79]
at java.net.URLClassLoader.defineClass(URLClassLoader.java:449) ~[na:1.7.0_79]
at java.net.URLClassLoader.access$100(URLClassLoader.java:71) ~[na:1.7.0_79]
at java.net.URLClassLoader$1.run(URLClassLoader.java:361) ~[na:1.7.0_79]
at java.net.URLClassLoader$1.run(URLClassLoader.java:355) ~[na:1.7.0_79]
at java.security.AccessController.doPrivileged(Native Method) ~[na:1.7.0_79]
at java.net.URLClassLoader.findClass(URLClassLoader.java:354) ~[na:1.7.0_79]
at java.lang.ClassLoader.loadClass(ClassLoader.java:425) ~[na:1.7.0_79]
at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:308) ~[na:1.7.0_79]
at java.lang.ClassLoader.loadClass(ClassLoader.java:358) ~[na:1.7.0_79]
at java.lang.Class.forName0(Native Method) ~[na:1.7.0_79]
at java.lang.Class.forName(Class.java:274) ~[na:1.7.0_79]
at sun.reflect.generics.factory.CoreReflectionFactory.makeNamedType(CoreReflectionFactory.java:114) ~[na:1.7.0_79]
at sun.reflect.generics.visitor.Reifier.visitClassTypeSignature(Reifier.java:125) ~[na:1.7.0_79]
at sun.reflect.generics.tree.ClassTypeSignature.accept(ClassTypeSignature.java:49) ~[na:1.7.0_79]
at sun.reflect.annotation.AnnotationParser.parseSig(AnnotationParser.java:432) ~[na:1.7.0_79]
at sun.reflect.annotation.AnnotationParser.parseAnnotation2(AnnotationParser.java:238) ~[na:1.7.0_79]
at sun.reflect.annotation.AnnotationParser.parseAnnotations2(AnnotationParser.java:117) ~[na:1.7.0_79]
at sun.reflect.annotation.AnnotationParser.parseAnnotations(AnnotationParser.java:70) ~[na:1.7.0_79]
at java.lang.Class.initAnnotationsIfNecessary(Class.java:3271) ~[na:1.7.0_79]
at java.lang.Class.getDeclaredAnnotations(Class.java:3248) ~[na:1.7.0_79]
at org.springframework.core.annotation.AnnotationUtils.findAnnotation(AnnotationUtils.java:704) ~[spring-core-4.2.5.RELEASE.jar:4.2.5.RELEASE]
at org.springframework.core.annotation.AnnotationUtils.findAnnotation(AnnotationUtils.java:683) ~[spring-core-4.2.5.RELEASE.jar:4.2.5.RELEASE]
at org.springframework.core.annotation.AnnotationUtils.findAnnotation(AnnotationUtils.java:660) ~[spring-core-4.2.5.RELEASE.jar:4.2.5.RELEASE]
at org.springframework.boot.BeanDefinitionLoader.isComponent(BeanDefinitionLoader.java:266) ~[spring-boot-1.3.3.RELEASE.jar:1.3.3.RELEASE]
at org.springframework.boot.BeanDefinitionLoader.load(BeanDefinitionLoader.java:157) ~[spring-boot-1.3.3.RELEASE.jar:1.3.3.RELEASE]
at org.springframework.boot.BeanDefinitionLoader.load(BeanDefinitionLoader.java:134) ~[spring-boot-1.3.3.RELEASE.jar:1.3.3.RELEASE]
at org.springframework.boot.BeanDefinitionLoader.load(BeanDefinitionLoader.java:126) ~[spring-boot-1.3.3.RELEASE.jar:1.3.3.RELEASE]
at org.springframework.boot.SpringApplication.load(SpringApplication.java:708) [spring-boot-1.3.3.RELEASE.jar:1.3.3.RELEASE]
at org.springframework.boot.SpringApplication.createAndRefreshContext(SpringApplication.java:357) [spring-boot-1.3.3.RELEASE.jar:1.3.3.RELEASE]
at org.springframework.boot.SpringApplication.run(SpringApplication.java:307) [spring-boot-1.3.3.RELEASE.jar:1.3.3.RELEASE]
at org.springframework.boot.SpringApplication.run(SpringApplication.java:1191) [spring-boot-1.3.3.RELEASE.jar:1.3.3.RELEASE]
at org.springframework.boot.SpringApplication.run(SpringApplication.java:1180) [spring-boot-1.3.3.RELEASE.jar:1.3.3.RELEASE]
at com.alibaba.boot.Application.main(Application.java:21) [classes/:na]
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) ~[na:1.7.0_79]
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57) ~[na:1.7.0_79]
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) ~[na:1.7.0_79]
at java.lang.reflect.Method.invoke(Method.java:606) ~[na:1.7.0_79]
at com.intellij.rt.execution.application.AppMain.main(AppMain.java:144) [idea_rt.jar:na]