2019-08-20 17:53:24,054 [ERROR] [http-nio-8047-exec-1] [HttpResult.java : 143] 系统异常 org.springframework.data.redis.serializer.SerializationException: Cannot serialize; nested exception is org.springframework.core.serializer.support.SerializationFaile…

一.问题描述:   在用redis做二级缓存时,出现如下异常   DefaultSerializer requires a Serializable payload but received an object of type [model.Admin] 二.问题分析:   要缓存的 Java 对象必须实现 Serializable 接口,因为 Spring 会将对象先序列化再存入 Redis 三.解决方法:  将缓存实体类继承 Serializable public class Admin i…

一.问题 eclipse启动时报下面的错误: Caused by: java.lang.IllegalArgumentException: Caches collection already contains value for com.crm.dao.PaperUserMapper    at org.apache.ibatis.session.Configuration$StrictMap.put(Configuration.java:782) ~[mybatis-3.2.7.jar:3.2…

mybatis报错:Caused by: java.lang.IllegalArgumentException: Result Maps collection does not contain value for com.geek.dao.ContentDao.Integer 出错原因:一个手误 <select id="selectAllFirstNavigationName" resultMap="firstNavigation"> SELECT fi…

写项目时应用了SpringSecurity框架来进行登陆验证,之前单独的写简单的SpringSecrity的Demo时并没有报错,但是当和SpringMVC一起整合时却发生了报错 报错如下: Caused by: java.lang.IllegalArgumentException: A universal match pattern ('/**') is defined before other patterns in the filter chain, causing them to be…

下面是我的报错信息 at org.apache.ibatis.session.defaults.DefaultSqlSession.selectList(DefaultSqlSession.java:148) at org.apache.ibatis.session.defaults.DefaultSqlSession.selectList(DefaultSqlSession.java:141) at sun.reflect.NativeMethodAccessorImpl.invoke0(Na…

是因为 Caused by: java.lang.IllegalArgumentException: Result Maps collection does not contain value for IStudentDaoMapper.Mapperdao.select是因为resultmaper的值错了…

1.问题的发生 Feign在默认情况下使用的是JDK原生的URLConnection发送HTTP请求,没有连接池,但是对每个地址会保持一个长连接,即利用HTTP的persistence connection .我们可以用Apache的HTTP Client替换Feign原始的http client, 从而获取连接池.超时时间等与性能息息相关的控制能力.Spring Cloud从Brixtion.SR5版本开始支持这种替换,首先在项目中声明Apache HTTP Client和feign-http…

由于数据库字段设置不正确引起的,不能选中 alter <table> modify <column> int unsigned; 关于unsigned int类型,可以看看它的帮助: INT[(M)] [UNSIGNED] [ZEROFILL] A normal-size integer. The signed range is -2147483648 to 2147483647. The unsigned range is 0 to 4294967295. Caused by:…

Caused by: java.lang.IllegalArgumentException: Modifying queries can only use void or int/Integer as return type!…