问题描述：

    我是用spring-boot 向redis中写入的数据，然后用jfinal的redis插件取值，出现异常。

    初步判断应该是序列化方式不同。

    请问这样的情况该如何取值？

异常信息：

java.lang.RuntimeException: java.io.IOException: java.lang.NullPointerException
	at com.jfinal.plugin.redis.serializer.FstSerializer.valueFromBytes(FstSerializer.java:78)
	at com.jfinal.plugin.redis.Cache.valueFromBytes(Cache.java:1211)
	at com.jfinal.plugin.redis.Cache.get(Cache.java:91)
	at com.xinzhuzhang.qianghuopro.controller.inner.WXController.test(WXController.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 com.jfinal.aop.Invocation.invoke(Invocation.java:73)
	at com.xinzhuzhang.qianghuopro.interceptor.GlobalActionExceptionInterceptor.intercept(GlobalActionExceptionInterceptor.java:20)
	at com.jfinal.aop.Invocation.invoke(Invocation.java:67)
	at com.jfinal.core.ActionHandler.handle(ActionHandler.java:74)
	at com.xinzhuzhang.qianghuopro.handler.APINOPageErrorHandler.handle(APINOPageErrorHandler.java:26)
	at com.xinzhuzhang.qianghuopro.handler.APIVersionHandler.handle(APIVersionHandler.java:48)
	at com.xinzhuzhang.qianghuopro.handler.FakeStaticHandler.handle(FakeStaticHandler.java:17)
	at com.jfinal.core.JFinalFilter.doFilter(JFinalFilter.java:72)
	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:240)
	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:207)
	at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:212)
	at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:106)
	at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:502)
	at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:141)
	at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:79)
	at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:88)
	at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:522)
	at org.apache.coyote.http11.AbstractHttp11Processor.process(AbstractHttp11Processor.java:1095)
	at org.apache.coyote.AbstractProtocol$AbstractConnectionHandler.process(AbstractProtocol.java:672)
	at org.apache.tomcat.util.net.NioEndpoint$SocketProcessor.doRun(NioEndpoint.java:1502)
	at org.apache.tomcat.util.net.NioEndpoint$SocketProcessor.run(NioEndpoint.java:1458)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)
	at org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskThread.java:61)
	at java.lang.Thread.run(Thread.java:748)
Caused by: java.io.IOException: java.lang.NullPointerException
	at org.nustaq.serialization.FSTObjectInput.readObject(FSTObjectInput.java:243)
	at com.jfinal.plugin.redis.serializer.FstSerializer.valueFromBytes(FstSerializer.java:75)
	... 32 more
Caused by: java.lang.NullPointerException
	at org.nustaq.serialization.FSTObjectInput.readObjectWithHeader(FSTObjectInput.java:353)
	at org.nustaq.serialization.FSTObjectInput.readObjectInternal(FSTObjectInput.java:327)
	at org.nustaq.serialization.FSTObjectInput.readObject(FSTObjectInput.java:307)
	at org.nustaq.serialization.FSTObjectInput.readObject(FSTObjectInput.java:241)
	... 33 more