问题：org.springframework.expression.spel.SpelEvaluationException: EL1008E:(pos 0): Property or field 'getAll' cannot be found on object of type 'org.springframework.cache.interceptor.CacheExpressionRootObject' - maybe not public?
@Cacheable(value = "redisCacheManager",key = "getAll")上面的key应该写成key="'getAll'",里面加个单引号
问题：Caused by: org.apache.ibatis.builder.BuilderException: Error parsing Mapper XML. Cause: java.lang.IllegalStateException: Type handler was null on parameter mapping for property 'imagepath'. It was either not specified and/or could not be found for the javaType (java.io.File) : jdbcType (null) combination.
Caused by: java.lang.IllegalStateException: Type handler was null on parameter mapping for property 'imagepath'. It was either not specified and/or could not be found for the javaType (java.io.File) : jdbcType (null) combination.
解决：在上传文件时，实体类应该是String类型的imagepath，我写成File类型，导致前台与之不匹配。
问题：The server cannot or will not process the request due to something that is p
解决：页面里面日期类型问题
问题：org.springframework.context.annotation.ConflictingBeanDefinitionException: Annotation-specified bean name 'messageBoardController' for bean class [com.jiangfx.controller.MessageBoardController] conflicts with existing, non-compatible bean definition of same name and class [com.jiangfx.controller.manager.MessageBoardController]
解决：两个congtroller名字一个，不在一个包也不行。
问题：org.springframework.core.serializer.support.SerializationFailedException: Failed to serialize object using DefaultSerializer; nested exception is java.io.NotSerializableException: com.jiangfx.entity.Banner
解决：实体类没有实现Serializable接口