博客

在使用mybatis 不能使用 @select注解的坑，程序运行就会显示找不到类啥的，就像下面的报错信息，这个是存在多个不同版本的包导致的

Description:

An attempt was made to call a method that does not exist. The attempt was made from the following location:

    com.baomidou.mybatisplus.core.MybatisMapperAnnotationBuilder$AnnotationWrapper.<init>(MybatisMapperAnnotationBuilder.java:677)

The following method did not exist:

    org.apache.ibatis.annotations.Select.databaseId()Ljava/lang/String;

The method's class, org.apache.ibatis.annotations.Select, is available from the following locations:

    jar:file:/D:/apache-maven-3.6.3/repository/org/mybatis/mybatis/3.5.1/mybatis-3.5.1.jar!/org/apache/ibatis/annotations/Select.class

It was loaded from the following location:

    file:/D:/apache-maven-3.6.3/repository/org/mybatis/mybatis/3.5.1/mybatis-3.5.1.jar


Action:

Correct the classpath of your application so that it contains a single, compatible version of org.apache.ibatis.annotations.Select

1. 检查是否包含了多个mybatis的jar包，如果存在去掉其中一个就可以了

2.是否集合其他组件包含了mybatis，例如 activiti包等等，把包含的jar包进行排除即可

 <dependency>
            <groupId>org.activiti</groupId>
            <artifactId>activiti-engine</artifactId>
            <version>7.1.0.M6</version>
            <exclusions>
                <exclusion>
                    <artifactId>mybatis</artifactId>
                    <groupId>org.mybatis</groupId>
                </exclusion>
                <exclusion>
                    <artifactId>mybatis-plus-extension</artifactId>
                    <groupId>com.baomidou</groupId>
                </exclusion>
                <exclusion>
                    <artifactId>mybatis-plus</artifactId>
                    <groupId>com.baomidou</groupId>
                </exclusion>
            </exclusions>
        </dependency>

3. idea工具可以使用maven helper插件，在pom.xml文件下打开Dependency Analyzer视图就可以清晰的查看哪些包冲突了，不需要的可以直接右键Exclude进行排除jar包