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RSS订阅原创 Failed to execute goal org.codehaus.mojo:exec-maven-plugin:3.0.0:exec (default-cli) on project sprin
Failed to execute goal org.codehaus.mojo:exec-maven-plugin:3.0.0:exec (default-cli) on project spring-01-ioc1: Command execution failed.报错
2021-08-25 20:03:32
658
原创 An attempt was made to call the method javax.persistence.PersistenceContext.synchronization()
An attempt was made to call the method javax.persistence.PersistenceContext.synchronization()Ljavax/persistence/SynchronizationType; but it does not exist. Its class, javax.persistence.PersistenceContext, is available from the following locations:
2021-01-22 10:33:28
1090
1原创 Java中多态讲解
1.多态的概述多态概述：在同一时刻体现出事物的不同状态 （如：水（气态、固态、液态））在面向对象Java语言中、多态的前提条件： 1)必须有继承关系，如果没有继承关系,无意义 2)必须有方法重写，在继承关系中,父类比较抽象(动物类), 动物类 eat(){...} 子类: 狗类, eat("狗吃骨头！！"){} 猫类 eat("猫吃鱼！！"){} 3)必须父类引用指向子类对象(向上转型) ; 格式:
2020-12-22 18:04:44
166
原创 关于org.apache.ibatis.binding.BindingException: Invalid bound statement (not found)解决办法
开始报这儿错一头雾水，在网上找了好多的解决方案都没有用！最后发现是配置要读取mapper.xml的地方写错了！原因：我Maven导包为MyBatis-Plus 读取mapper.xml却写的 mybatis.mapper-locations=classpath:mapping/*Mapper.xml 太粗心大意了解决方案：1.查看Maven是导的Mybatis 还是 Mybatis-plus2.如果是Mybatis 读取mapper.xml 应该为： mybatis.mapper-locati
2020-12-09 17:48:31
396
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