java.lang.IllegalArgumentException: Mapped Statements collection already contain

 

java.lang.IllegalArgumentException: Mapped Statements collection does not contain value for " 此处为包名"

错误原因是命名空间找不到： 以info.xml为例，(打不到info.xml文件)

1.查看mybitis-config.xml 中mappers中是否添加了此xml

<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE configuration
    PUBLIC "-//mybatis.org//DTD Config 3.0//EN"
    "http://mybatis.org/dtd/mybatis-3-config.dtd">
<configuration>
    <settings>
        <!--set lazy fetching-->
        <setting name="lazyLoadingEnabled" value="false" />
    </settings>

    <mappers>
         <span style="color:#cc0000;"><mapper resource="ibatis/info/info.xml"/>
</span> </mappers>

</configuration>

2.查看info.xml中namespace属性

<mapper namespace="cn.com.cc.info.dao.XDao"> 名值对确认无误就OK了