IDEA+Maven的SSM專案，遇到一個深坑invalid bound statement (not found)，就是mapper檔案掃描不到！

各種除錯，各種找Bug,網上大多數人說是mapper配置檔案路徑問題，但我的沒錯啊，最後才發現這種說法：

原來是需要在pom.xml檔案中配置resource，不然mapper.xml檔案就會被漏掉！

pom.xml的<build>中配置了resource，bug消失了~

        <!-- 如果不新增此節點mybatis的mapper.xml檔案都會被漏掉。 -->
        <resources>
            <resource>
                <directory>src/main/java</directory>
                <includes>
                    <include>**/*.properties</include>
                    <include>**/*.xml</include>
                </includes>
                <filtering>false</filtering>
            </resource>
            <resource>
                <directory>src/main/resources</directory>
                <includes>
                    <include>**/*.properties</include>
                    <include>**/*.xml</include>
                </includes>
                <filtering>false</filtering>
            </resource>
        </resources>