在使用Maven打包工程运行的时候，有时会出现以下的异常：

-bash-4.1# java -cp iteblog-1.0-SNAPSHOT.jar com.iteblog.Client
Exception in thread "main" java.lang.SecurityException: Invalid signature file digest for Manifest main attributes
  at sun.security.util.SignatureFileVerifier.processImpl(SignatureFileVerifier.java:287)
  at sun.security.util.SignatureFileVerifier.process(SignatureFileVerifier.java:240)
  at java.util.jar.JarVerifier.processEntry(JarVerifier.java:317)
  at java.util.jar.JarVerifier.update(JarVerifier.java:228)
  at java.util.jar.JarFile.initializeVerifier(JarFile.java:348)
  at java.util.jar.JarFile.getInputStream(JarFile.java:415)
  at sun.misc.URLClassPath$JarLoader$2.getInputStream(URLClassPath.java:775)
  at sun.misc.Resource.cachedInputStream(Resource.java:77)
  at sun.misc.Resource.getByteBuffer(Resource.java:160)
  at java.net.URLClassLoader.defineClass(URLClassLoader.java:436)
  at java.net.URLClassLoader.access$100(URLClassLoader.java:71)
  at java.net.URLClassLoader$1.run(URLClassLoader.java:361)
  at java.net.URLClassLoader$1.run(URLClassLoader.java:355)
  at java.security.AccessController.doPrivileged(Native Method)
  at java.net.URLClassLoader.findClass(URLClassLoader.java:354)
  at java.lang.ClassLoader.loadClass(ClassLoader.java:425)
  at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:308)
  at java.lang.ClassLoader.loadClass(ClassLoader.java:358)
  at sun.launcher.LauncherHelper.checkAndLoadMain(LauncherHelper.java:482)

这是因为在使用Maven打包的时候导致某些包的重复引用，以至于打包之后的META-INF的目录下多出了一些*.SF,*.DSA,*.RSA文件所致，我们可以在pom文件里面加入以下配置：

<configuration>
    <filters>
        <filter>
            <artifact>*:*</artifact>
            <excludes>
                <exclude>META-INF/*.SF</exclude>
                <exclude>META-INF/*.DSA</exclude>
                <exclude>META-INF/*.RSA</exclude>
            </excludes>
        </filter>
    </filters>
</configuration>

当然，你也可以将报错的jar包解压，然后删除META-INF的目录下的*.SF,*.DSA,*.RSA文件，然后再打包即可。