我正在尝试编写一个数字聚类工具。基本上，我有一个列表（在这里称为“产品”），应该从升序列表转换为表示数据集中数字之间链接的列表。读取数据集，删除回车符和连字符是可以的，但是根据数据集操作列表给我带来了麻烦。
2019-09-11 10:01:56,394 task-scheduler-2 ERROR LoggingHandler:192 - org.springframework.core.serializer.support.SerializationFailedException: Failed to deserialize payload. Is the byte array a result of corresponding serialization for DefaultDeserializer?; nested exception is java.io.InvalidClassException: org.springframework.security.authentication.UsernamePasswordAuthenticationToken; local class incompatible: stream classdesc serialVersionUID = 400, local class serialVersionUID = 420
at org.springframework.integration.support.converter.WhiteListDeserializingConverter.convert(WhiteListDeserializingConverter.java:140)
at org.springframework.integration.jdbc.store.channel.MessageRowMapper.mapRow(MessageRowMapper.java:49)
at org.springframework.integration.jdbc.store.channel.MessageRowMapper.mapRow(MessageRowMapper.java:37)
at org.springframework.jdbc.core.RowMapperResultSetExtractor.extractData(RowMapperResultSetExtractor.java:93)
at org.springframework.jdbc.core.RowMapperResultSetExtractor.extractData(RowMapperResultSetExtractor.java:60)
at org.springframework.jdbc.core.JdbcTemplate$1.doInPreparedStatement(JdbcTemplate.java:703)
at org.springframework.jdbc.core.JdbcTemplate.execute(JdbcTemplate.java:639)
at org.springframework.jdbc.core.JdbcTemplate.query(JdbcTemplate.java:690)
at org.springframework.jdbc.core.JdbcTemplate.query(JdbcTemplate.java:717)
at org.springframework.jdbc.core.JdbcTemplate.query(JdbcTemplate.java:767)
at org.springframework.jdbc.core.namedparam.NamedParameterJdbcTemplate.query(NamedParameterJdbcTemplate.java:192)
at org.springframework.integration.jdbc.store.JdbcChannelMessageStore.doPollForMessage(JdbcChannelMessageStore.java:607)
at org.springframework.integration.jdbc.store.JdbcChannelMessageStore.pollMessageFromGroup(JdbcChannelMessageStore.java:557)
at org.springframework.integration.store.MessageGroupQueue.doPoll(MessageGroupQueue.java:318)
at org.springframework.integration.store.MessageGroupQueue.poll(MessageGroupQueue.java:162)
at org.springframework.integration.store.MessageGroupQueue.poll(MessageGroupQueue.java:49)
at org.springframework.integration.channel.QueueChannel.doReceive(QueueChannel.java:116)
at org.springframework.integration.channel.AbstractPollableChannel.receive(AbstractPollableChannel.java:105)
at org.springframework.integration.endpoint.PollingConsumer.receiveMessage(PollingConsumer.java:192)
at org.springframework.integration.endpoint.AbstractPollingEndpoint.doPoll(AbstractPollingEndpoint.java:245)
at org.springframework.integration.endpoint.AbstractPollingEndpoint.access$000(AbstractPollingEndpoint.java:58)
at org.springframework.integration.endpoint.AbstractPollingEndpoint$1.call(AbstractPollingEndpoint.java:190)
at org.springframework.integration.endpoint.AbstractPollingEndpoint$1.call(AbstractPollingEndpoint.java:186)
at org.springframework.integration.endpoint.AbstractPollingEndpoint$Poller$1.run(AbstractPollingEndpoint.java:353)
at org.springframework.integration.util.ErrorHandlingTaskExecutor$1.run(ErrorHandlingTaskExecutor.java:55)
at org.springframework.core.task.SyncTaskExecutor.execute(SyncTaskExecutor.java:50)
at org.springframework.integration.util.ErrorHandlingTaskExecutor.execute(ErrorHandlingTaskExecutor.java:51)
at org.springframework.integration.endpoint.AbstractPollingEndpoint$Poller.run(AbstractPollingEndpoint.java:344)
at org.springframework.scheduling.support.DelegatingErrorHandlingRunnable.run(DelegatingErrorHandlingRunnable.java:54)
at org.springframework.scheduling.concurrent.ReschedulingRunnable.run(ReschedulingRunnable.java:81)
at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
at java.util.concurrent.FutureTask.run(FutureTask.java:266)
at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$201(ScheduledThreadPoolExecutor.java:180)
at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:293)
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
at java.lang.Thread.run(Thread.java:748)
Caused by: java.io.InvalidClassException: org.springframework.security.authentication.UsernamePasswordAuthenticationToken; local class incompatible: stream classdesc serialVersionUID = 400, local class serialVersionUID = 420
at java.io.ObjectStreamClass.initNonProxy(ObjectStreamClass.java:699)
at java.io.ObjectInputStream.readNonProxyDesc(ObjectInputStream.java:1885)
at java.io.ObjectInputStream.readClassDesc(ObjectInputStream.java:1751)
at java.io.ObjectInputStream.readOrdinaryObject(ObjectInputStream.java:2042)
at java.io.ObjectInputStream.readObject0(ObjectInputStream.java:1573)
at java.io.ObjectInputStream.readObject(ObjectInputStream.java:431)
at java.util.HashMap.readObject(HashMap.java:1412)
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 java.io.ObjectStreamClass.invokeReadObject(ObjectStreamClass.java:1170)
at java.io.ObjectInputStream.readSerialData(ObjectInputStream.java:2178)
at java.io.ObjectInputStream.readOrdinaryObject(ObjectInputStream.java:2069)
at java.io.ObjectInputStream.readObject0(ObjectInputStream.java:1573)
at java.io.ObjectInputStream.defaultReadFields(ObjectInputStream.java:2287)
at java.io.ObjectInputStream.defaultReadObject(ObjectInputStream.java:561)
at org.springframework.messaging.MessageHeaders.readObject(MessageHeaders.java:292)
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 java.io.ObjectStreamClass.invokeReadObject(ObjectStreamClass.java:1170)
at java.io.ObjectInputStream.readSerialData(ObjectInputStream.java:2178)
at java.io.ObjectInputStream.readOrdinaryObject(ObjectInputStream.java:2069)
at java.io.ObjectInputStream.readObject0(ObjectInputStream.java:1573)
at java.io.ObjectInputStream.defaultReadFields(ObjectInputStream.java:2287)
at java.io.ObjectInputStream.defaultReadObject(ObjectInputStream.java:561)
at org.springframework.messaging.MessageHeaders.readObject(MessageHeaders.java:292)
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 java.io.ObjectStreamClass.invokeReadObject(ObjectStreamClass.java:1170)
at java.io.ObjectInputStream.readSerialData(ObjectInputStream.java:2178)
at java.io.ObjectInputStream.readOrdinaryObject(ObjectInputStream.java:2069)
at java.io.ObjectInputStream.readObject0(ObjectInputStream.java:1573)
at java.io.ObjectInputStream.defaultReadFields(ObjectInputStream.java:2287)
at java.io.ObjectInputStream.readSerialData(ObjectInputStream.java:2211)
at java.io.ObjectInputStream.readOrdinaryObject(ObjectInputStream.java:2069)
at java.io.ObjectInputStream.readObject0(ObjectInputStream.java:1573)
at java.io.ObjectInputStream.readObject(ObjectInputStream.java:431)
at org.springframework.integration.support.converter.WhiteListDeserializingConverter.deserialize(WhiteListDeserializingConverter.java:158)
at org.springframework.integration.support.converter.WhiteListDeserializingConverter.convert(WhiteListDeserializingConverter.java:131)
... 36 more
我希望结果为[0、1、1、1、1、5、5、7、7、9、1、5、5]，但遇到“列表索引超出范围”时，使用其他数据集。
用于提供上述所需乘积的数据集如下：'1-2 \ n'，'2-3 \ n'，'3-4 \ n'，'5-6 \ n'，' 7-8 \ n'，'2-10 \ n'，'11-12 \ n'，'5-12 \ n'，'\ n'
但是，我面临的最大问题是使用其他数据集。事实证明，如果没有其他回车符，我将遇到列表索引超出范围的错误。
答案 0 :(得分：0)
我不太清楚您实际上在做什么。 “指示链接”是什么意思，最终输出如何实现？另外，您可以显示一个数据集实际失败的示例吗？并提供您得到的实际例外情况？
无论如何，您的代码都过于复杂，将其清理掉也可以解决索引问题。使用上面示例中的nums：
# Drop empty elements, split on hyphen, and convert to integers
pairs = [list(map(int, item.split('-'))) for item in nums if item.strip()]
# You don't need a for loop to count a list
count = len(pairs)
# You can get the maximum element with a nested generator expression
largest = max(item for p in pairs for item in p)
此外，在最后一个循环中，您要遍历product并同时对其进行就地修改，这往往不是一个好主意。如果我对您要实现的目标有了更多的了解，那么我也许可以提出一种更好的方法。