java.lang.UnsatisfiedLinkError: no nio in java.library.path

23-Jul-2018 14:19:08.072 SEVERE [main] org.apache.tomcat.util.digester.Digester.startElement Begin event threw error
 java.lang.UnsatisfiedLinkError: no nio in java.library.path
	at java.lang.ClassLoader.loadLibrary(ClassLoader.java:1867)
	at java.lang.Runtime.loadLibrary0(Runtime.java:870)
	at java.lang.System.loadLibrary(System.java:1122)
	at sun.nio.ch.IOUtil$1.run(IOUtil.java:360)
	at sun.nio.ch.IOUtil$1.run(IOUtil.java:357)
	at java.security.AccessController.doPrivileged(Native Method)
	at sun.nio.ch.IOUtil.(IOUtil.java:356)

tomcat启动报这个错误的话，重新安装jdk可以解决。