项目添加了spring-session-data-redisjar后，使用图片验证码提示异常：
org.springframework.data.redis.serializer.SerializationException: Cannot serialize; nested exception is org.springframework.core.serializer.support.SerializationFailedException: Failed to serialize object using DefaultSerializer; nested exception is java.io.NotSerializableException: java.awt.image.BufferedImage at org.springframework.data.redis.serializer.JdkSerializationRedisSerializer.serialize(JdkSerializationRedisSerializer.java:96) ~[spring-data-redis-2.3.6.RELEASE.jar:2.3.6.RELEASE] at org.springframework.data.redis.core.AbstractOperations.rawHashValue(AbstractOperations.java:185) ~[spring-data-redis-2.3.6.RELEASE.jar:2.3.6.RELEASE] at org.springframework.data.redis.core.DefaultHashOperations.putAll(DefaultHashOperations.java:147) ~[spring-data-redis-2.3.6.RELEASE.jar:2.3.6.RELEASE] at org.springframework.data.redis.core.DefaultBoundHashOperations.putAll(DefaultBoundHashOperations.java:147) ~[spring-data-redis-2.3.6.RELEASE.jar:2.3.6.RELEASE] at org.springframework.session.data.redis.RedisIndexedSessionRepository$RedisSession.saveDelta(RedisIndexedSessionRepository.java:795) ~[spring-session-data-redis-2.3.1.RELEASE.jar:2.3.1.RELEASE] at org.springframework.session.data.redis.RedisIndexedSessionRepository$RedisSession.save(RedisIndexedSessionRepository.java:783) ~[spring-session-data-redis-2.3.1.RELEASE.jar:2.3.1.RELEASE] at org.springframework.session.data.redis.RedisIndexedSessionRepository$RedisSession.access$000(RedisIndexedSessionRepository.java:670) ~[spring-session-data-redis-2.3.1.RELEASE.jar:2.3.1.RELEASE] at org.springframework.session.data.redis.RedisIndexedSessionRepository.save(RedisIndexedSessionRepository.java:398) ~[spring-session-data-redis-2.3.1.RELEASE.jar:2.3.1.RELEASE] at org.springframework.session.data.redis.RedisIndexedSessionRepository.save(RedisIndexedSessionRepository.java:249) ~[spring-session-data-redis-2.3.1.RELEASE.jar:2.3.1.RELEASE] at org.springframework.session.web.http.SessionRepositoryFilter$SessionRepositoryRequestWrapper.commitSession(SessionRepositoryFilter.java:225) ~[spring-session-core-2.3.1.RELEASE.jar:2.3.1.RELEASE] at org.springframework.session.web.http.SessionRepositoryFilter$SessionRepositoryRequestWrapper.access$100(SessionRepositoryFilter.java:192) ~[spring-session-core-2.3.1.RELEASE.jar:2.3.1.RELEASE] at org.springframework.session.web.http.SessionRepositoryFilter.doFilterInternal(SessionRepositoryFilter.java:144) ~[spring-session-core-2.3.1.RELEASE.jar:2.3.1.RELEASE] at org.springframework.session.web.http.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:82) ~[spring-session-core-2.3.1.RELEASE.jar:2.3.1.RELEASE] at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193) ~[tomcat-embed-core-9.0.41.jar:9.0.41] at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166) ~[tomcat-embed-core-9.0.41.jar:9.0.41] at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:103) ~[spring-web-5.2.12.RELEASE.jar:5.2.12.RELEASE] at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193) ~[tomcat-embed-core-9.0.41.jar:9.0.41] at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166) ~[tomcat-embed-core-9.0.41.jar:9.0.41] at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:103) ~[spring-web-5.2.12.RELEASE.jar:5.2.12.RELEASE] at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193) ~[tomcat-embed-core-9.0.41.jar:9.0.41] at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166) ~[tomcat-embed-core-9.0.41.jar:9.0.41] at org.apache.catalina.core.ApplicationDispatcher.invoke(ApplicationDispatcher.java:712) ~[tomcat-embed-core-9.0.41.jar:9.0.41] at org.apache.catalina.core.ApplicationDispatcher.processRequest(ApplicationDispatcher.java:461) ~[tomcat-embed-core-9.0.41.jar:9.0.41] at org.apache.catalina.core.ApplicationDispatcher.doForward(ApplicationDispatcher.java:384) ~[tomcat-embed-core-9.0.41.jar:9.0.41] at org.apache.catalina.core.ApplicationDispatcher.forward(ApplicationDispatcher.java:312) ~[tomcat-embed-core-9.0.41.jar:9.0.41] at org.apache.catalina.core.StandardHostValve.custom(StandardHostValve.java:398) [tomcat-embed-core-9.0.41.jar:9.0.41] at org.apache.catalina.core.StandardHostValve.status(StandardHostValve.java:257) [tomcat-embed-core-9.0.41.jar:9.0.41] at org.apache.catalina.core.StandardHostValve.throwable(StandardHostValve.java:352) [tomcat-embed-core-9.0.41.jar:9.0.41] at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:177) [tomcat-embed-core-9.0.41.jar:9.0.41] at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:92) [tomcat-embed-core-9.0.41.jar:9.0.41] at org.apache.catalina.core.StandardEnginevalve.invoke(StandardEnginevalve.java:78) [tomcat-embed-core-9.0.41.jar:9.0.41] at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:343) [tomcat-embed-core-9.0.41.jar:9.0.41] at org.apache.coyote.http11.Http11Processor.service(Http11Processor.java:374) [tomcat-embed-core-9.0.41.jar:9.0.41] at org.apache.coyote.AbstractProcessorLight.process(AbstractProcessorLight.java:65) [tomcat-embed-core-9.0.41.jar:9.0.41] at org.apache.coyote.AbstractProtocol$ConnectionHandler.process(AbstractProtocol.java:888) [tomcat-embed-core-9.0.41.jar:9.0.41] at org.apache.tomcat.util.net.NioEndpoint$SocketProcessor.doRun(NioEndpoint.java:1597) [tomcat-embed-core-9.0.41.jar:9.0.41] at org.apache.tomcat.util.net.SocketProcessorbase.run(SocketProcessorbase.java:49) [tomcat-embed-core-9.0.41.jar:9.0.41] at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149) [na:1.8.0_181] at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624) [na:1.8.0_181] at org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskThread.java:61) [tomcat-embed-core-9.0.41.jar:9.0.41] at java.lang.Thread.run(Thread.java:748) [na:1.8.0_181] Caused by: org.springframework.core.serializer.support.SerializationFailedException: Failed to serialize object using DefaultSerializer; nested exception is java.io.NotSerializableException: java.awt.image.BufferedImage at org.springframework.core.serializer.support.SerializingConverter.convert(SerializingConverter.java:64) ~[spring-core-5.2.12.RELEASE.jar:5.2.12.RELEASE] at org.springframework.core.serializer.support.SerializingConverter.convert(SerializingConverter.java:33) ~[spring-core-5.2.12.RELEASE.jar:5.2.12.RELEASE] at org.springframework.data.redis.serializer.JdkSerializationRedisSerializer.serialize(JdkSerializationRedisSerializer.java:94) ~[spring-data-redis-2.3.6.RELEASE.jar:2.3.6.RELEASE] ... 40 common frames omitted Caused by: java.io.NotSerializableException: java.awt.image.BufferedImage at java.io.ObjectOutputStream.writeObject0(ObjectOutputStream.java:1184) ~[na:1.8.0_181] at java.io.ObjectOutputStream.defaultWriteFields(ObjectOutputStream.java:1548) ~[na:1.8.0_181] at java.io.ObjectOutputStream.writeSerialData(ObjectOutputStream.java:1509) ~[na:1.8.0_181] at java.io.ObjectOutputStream.writeOrdinaryObject(ObjectOutputStream.java:1432) ~[na:1.8.0_181] at java.io.ObjectOutputStream.writeObject0(ObjectOutputStream.java:1178) ~[na:1.8.0_181] at java.io.ObjectOutputStream.writeObject(ObjectOutputStream.java:348) ~[na:1.8.0_181] at org.springframework.core.serializer.DefaultSerializer.serialize(DefaultSerializer.java:46) ~[spring-core-5.2.12.RELEASE.jar:5.2.12.RELEASE] at org.springframework.core.serializer.Serializer.serializeToByteArray(Serializer.java:56) ~[spring-core-5.2.12.RELEASE.jar:5.2.12.RELEASE] at org.springframework.core.serializer.support.SerializingConverter.convert(SerializingConverter.java:60) ~[spring-core-5.2.12.RELEASE.jar:5.2.12.RELEASE] ... 42 common frames omitted原因
项目中使用到的这个类没有序列化BufferedImage
解决新建一个类，然后继承它，接着把代码中用到BufferedImage的地方，都换成这个新建的类
示例MyBufferedImage
import java.awt.image.BufferedImage;
import java.io.Serializable;
public class MyBufferedImage extends BufferedImage implements Serializable {
public MyBufferedImage(int width, int height, int imageType) {
super(width, height, imageType);
}
}
替换
MyBufferedImage image = new MyBufferedImage(width, height, BufferedImage.TYPE_INT_RGB);
