在linux下配置nexus后启动出错

Running Nexus OSS...
wrapper | --> Wrapper Started as Console
wrapper | Launching a JVM...
wrapper | JVM exited while loading the application.
jvm 1 | Exception in thread "main" java.lang.UnsupportedClassVersionError: org/sonatype/nexus/bootstrap/jsw/JswLauncher : Unsupported major.minor version 51.0
jvm 1 | at java.lang.ClassLoader.defineClass1(Native Method)
jvm 1 | at java.lang.ClassLoader.defineClassCond(ClassLoader.java:631)
jvm 1 | at java.lang.ClassLoader.defineClass(ClassLoader.java:615)
jvm 1 | at java.security.SecureClassLoader.defineClass(SecureClassLoader.java:141)
jvm 1 | at java.net.URLClassLoader.defineClass(URLClassLoader.java:283)
jvm 1 | at java.net.URLClassLoader.access$000(URLClassLoader.java:58)
jvm 1 | at java.net.URLClassLoader$1.run(URLClassLoader.java:197)
jvm 1 | at java.security.AccessController.doPrivileged(Native Method)
jvm 1 | at java.net.URLClassLoader.findClass(URLClassLoader.java:190)
jvm 1 | at java.lang.ClassLoader.loadClass(ClassLoader.java:306)
jvm 1 | at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:301)
jvm 1 | at java.lang.ClassLoader.loadClass(ClassLoader.java:247)
jvm 1 | Could not find the main class: org.sonatype.nexus.bootstrap.jsw.JswLauncher. Program will exit.
wrapper | Reloading Wrapper configuration...
wrapper | Launching a JVM...
wrapper | JVM exited while loading the application.
jvm 2 | Exception in thread "main" java.lang.UnsupportedClassVersionError: org/sonatype/nexus/bootstrap/jsw/JswLauncher : Unsupported major.minor version 51.0
jvm 2 | at java.lang.ClassLoader.defineClass1(Native Method)
jvm 2 | at java.lang.ClassLoader.defineClassCond(ClassLoader.java:631)
jvm 2 | at java.lang.ClassLoader.defineClass(ClassLoader.java:615)
jvm 2 | at java.security.SecureClassLoader.defineClass(SecureClassLoader.java:141)
jvm 2 | at java.net.URLClassLoader.defineClass(URLClassLoader.java:283)
jvm 2 | at java.net.URLClassLoader.access$000(URLClassLoader.java:58)
jvm 2 | at java.net.URLClassLoader$1.run(URLClassLoader.java:197)
jvm 2 | at java.security.AccessController.doPrivileged(Native Method)
jvm 2 | at java.net.URLClassLoader.findClass(URLClassLoader.java:190)
jvm 2 | at java.lang.ClassLoader.loadClass(ClassLoader.java:306)
jvm 2 | at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:301)
jvm 2 | at java.lang.ClassLoader.loadClass(ClassLoader.java:247)
jvm 2 | Could not find the main class: org.sonatype.nexus.bootstrap.jsw.JswLauncher. Program will exit.
wrapper | Reloading Wrapper configuration...
wrapper | Launching a JVM...
wrapper | JVM exited while loading the application.
jvm 3 | Exception in thread "main" java.lang.UnsupportedClassVersionError: org/sonatype/nexus/bootstrap/jsw/JswLauncher : Unsupported major.minor version 51.0
jvm 3 | at java.lang.ClassLoader.defineClass1(Native Method)
jvm 3 | at java.lang.ClassLoader.defineClassCond(ClassLoader.java:631)
jvm 3 | at java.lang.ClassLoader.defineClass(ClassLoader.java:615)
jvm 3 | at java.security.SecureClassLoader.defineClass(SecureClassLoader.java:141)
jvm 3 | at java.net.URLClassLoader.defineClass(URLClassLoader.java:283)
jvm 3 | at java.net.URLClassLoader.access$000(URLClassLoader.java:58)
jvm 3 | at java.net.URLClassLoader$1.run(URLClassLoader.java:197)
jvm 3 | at java.security.AccessController.doPrivileged(Native Method)
jvm 3 | at java.net.URLClassLoader.findClass(URLClassLoader.java:190)
jvm 3 | at java.lang.ClassLoader.loadClass(ClassLoader.java:306)
jvm 3 | at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:301)
jvm 3 | at java.lang.ClassLoader.loadClass(ClassLoader.java:247)
jvm 3 | Could not find the main class: org.sonatype.nexus.bootstrap.jsw.JswLauncher. Program will exit.
wrapper | Reloading Wrapper configuration...
wrapper | Launching a JVM...
wrapper | JVM exited while loading the application.
jvm 4 | Exception in thread "main" java.lang.UnsupportedClassVersionError: org/sonatype/nexus/bootstrap/jsw/JswLauncher : Unsupported major.minor version 51.0
jvm 4 | at java.lang.ClassLoader.defineClass1(Native Method)
jvm 4 | at java.lang.ClassLoader.defineClassCond(ClassLoader.java:631)
jvm 4 | at java.lang.ClassLoader.defineClass(ClassLoader.java:615)
jvm 4 | at java.security.SecureClassLoader.defineClass(SecureClassLoader.java:141)
jvm 4 | at java.net.URLClassLoader.defineClass(URLClassLoader.java:283)
jvm 4 | at java.net.URLClassLoader.access$000(URLClassLoader.java:58)
jvm 4 | at java.net.URLClassLoader$1.run(URLClassLoader.java:197)
jvm 4 | at java.security.AccessController.doPrivileged(Native Method)
jvm 4 | at java.net.URLClassLoader.findClass(URLClassLoader.java:190)
jvm 4 | at java.lang.ClassLoader.loadClass(ClassLoader.java:306)
jvm 4 | at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:301)
jvm 4 | at java.lang.ClassLoader.loadClass(ClassLoader.java:247)
jvm 4 | Could not find the main class: org.sonatype.nexus.bootstrap.jsw.JswLauncher. Program will exit.
wrapper | Reloading Wrapper configuration...
wrapper | Launching a JVM...
wrapper | JVM exited while loading the application.
jvm 5 | Exception in thread "main" java.lang.UnsupportedClassVersionError: org/sonatype/nexus/bootstrap/jsw/JswLauncher : Unsupported major.minor version 51.0
jvm 5 | at java.lang.ClassLoader.defineClass1(Native Method)
jvm 5 | at java.lang.ClassLoader.defineClassCond(ClassLoader.java:631)
jvm 5 | at java.lang.ClassLoader.defineClass(ClassLoader.java:615)
jvm 5 | at java.security.SecureClassLoader.defineClass(SecureClassLoader.java:141)
jvm 5 | at java.net.URLClassLoader.defineClass(URLClassLoader.java:283)
jvm 5 | at java.net.URLClassLoader.access$000(URLClassLoader.java:58)
jvm 5 | at java.net.URLClassLoader$1.run(URLClassLoader.java:197)
jvm 5 | at java.security.AccessController.doPrivileged(Native Method)
jvm 5 | at java.net.URLClassLoader.findClass(URLClassLoader.java:190)
jvm 5 | at java.lang.ClassLoader.loadClass(ClassLoader.java:306)
jvm 5 | at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:301)
jvm 5 | at java.lang.ClassLoader.loadClass(ClassLoader.java:247)
jvm 5 | Could not find the main class: org.sonatype.nexus.bootstrap.jsw.JswLauncher. Program will exit.
wrapper | There were 5 failed launches in a row, each lasting less than 300 seconds. Giving up.
wrapper | There may be a configuration problem: please check the logs.
wrapper | <-- Wrapper Stopped