Could not resolve type alias ‘‘. Cause: java.lang.ClassNotFoundException: Cannot find class:

使用ssm框架写项目，在写了一条语句后突然报错

Could not resolve type alias ‘’. Cause: java.lang.ClassNotFoundException: Cannot find class:

Could not resolve type alias ‘‘. Cause: java.lang.ClassNotFoundException: Cannot find class:
以为是不小心改了配置文件，于是检查了一遍applicationContext.xml、springMVC.xml和mybatisConfig.xml
后来我回到那条sql语句，定位到了参数类型，我记得mybatis可以自动匹配参数类型所以没加那句话，之后查了一下，需要加！！！
Could not resolve type alias ‘‘. Cause: java.lang.ClassNotFoundException: Cannot find class:

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