Mybatis报错----result Map

每次搭建Mybatis环境和Spring整合的时候都会报这个错：java.lang.IllegalArgumentException: Result Maps collection already contains value for XXX这个错误。

搭建过程如下：

Spring Beans文件：

	<!-- 配置包扫描 -->
	<!-- 使用annotation 自动注册bean, 并保证@Required、@Autowired的属性被注入 -->
    <context:component-scan base-package="com.lgy">
		<context:exclude-filter type="annotation"
			expression="org.springframework.stereotype.Controller" />
	</context:component-scan> 
	<!-- 使其注解生效 -->
	<context:annotation-config />
	
	<!-- 加载数据源 -->
	<import resource="datasource/data_source.xml"/>
	
	<!-- 配置MyBatis SqlSessionFactory -->
	<import resource="mybatis/my_batis.xml"/>
 	
	<!-- 配置MyBatis事物通知 -->
	<import resource="transmanager/transmanager.xml"/>

Mybatis文件：

<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"
	xmlns:context="http://www.springframework.org/schema/context"
	xmlns:aop="http://www.springframework.org/schema/aop"
	xmlns:tx="http://www.springframework.org/schema/tx"
	xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
	xsi:schemaLocation="http://www.springframework.org/schema/beans 
		                    http://www.springframework.org/schema/beans/spring-beans.xsd
		                    http://www.springframework.org/schema/context 
		                    http://www.springframework.org/schema/context/spring-context.xsd
		                    http://www.springframework.org/schema/tx 
		                    http://www.springframework.org/schema/tx/spring-tx.xsd
		                    http://www.springframework.org/schema/aop 
		                    http://www.springframework.org/schema/aop/spring-aop.xsd">
	<!-- 配置MyBatis SqlSessionFactory -->
	<bean id="sqlSessionFactory" class="org.mybatis.spring.SqlSessionFactoryBean">
		<property name="dataSource" ref="dataSource" />
		<property name="configLocation" value="classpath:myBatis-config.xml"></property>
		<property name="mapperLocations" value="classpath:mapper/**/*Mapper.xml" />
	</bean>
	<!-- 采用自动扫描包的形式来实例化dao层 --> 
	<bean class="org.mybatis.spring.mapper.MapperScannerConfigurer"> 
 		<property name="basePackage" value="com.lgy.dao.**" /> 
 	</bean> 
</beans>

Mybatis core:

<?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>
	<!-- 别名配置 -->
	<typeAliases>
		<package name="com.lgy.entry"/>
	</typeAliases>
</configuration>

用package配置别名，就是把该包下的所有类都配置了别名。

Dao:

import com.lgy.entry.UserInfo;
import com.lgy.entry.base.UserInfoQuery;



/**
 * 微信用户管理
 * @author feng
 *
 */
public interface UserInfoDao {
	/**
	 * 增加用户信息
	 * @param userInfo
	 */
	void addUserInfo(UserInfo userInfo);
	
	/**
	 * 修改用户订阅状态信息
	 * @param userInfo
	 */
	void updateUserInfoByOpenId(UserInfo userInfo);
	
	/**
	 * 根据openId查找用户信息
	 */
	UserInfo findUserInfoByOpenId(String openId);
	
	/**
	 * 查询所有用户信息 带分页条件
	 */
	List<UserInfo> finUserInfoList(UserInfoQuery userInfoQuery);
	
	/**
	 * 获取所有的数量
	 * @param userInfoQuery
	 * @return
	 */
	Integer getCount(UserInfoQuery userInfoQuery);
}

Mappler文件：

<?xml version="1.0" encoding="UTF-8" ?>  
<!DOCTYPE mapper PUBLIC "-//mybatis.org//DTD Mapper 3.0//EN" "http://mybatis.org/dtd/mybatis-3-mapper.dtd"> 
<mapper namespace="com.lgy.dao.UserInfoDao">
    <resultMap type="UserInfo" id="userInfoRM">
    	<id column="id" property="id"/>
    	
    	<result column="open_id" property="openId" />
    	<result column="subscribe_status" property="subscribeStatus" />
    </resultMap>
    
    <!-- Limiti SQL -->
	<sql id="userInfoLimit">
		<if test="startRow != null and pageSize != null">
			limit #{startRow},#{pageSize}
		</if>
	</sql>
	
    <!-- 插入一条userinfo记录 -->
    <insert id="addUserInfo" parameterType="UserInfo">
    	insert into weixin_user_info(id, openId, subscribe_status) values(null, #{openId}, #{subscribeStatus});
    </insert>
    
    <!-- 根据openId查找用户信息 -->
    <update id="updateUserInfoByOpenId" parameterType="UserInfo">
    	update weixin_user_info
    	set
    		subscribe_status = #{subscribeStatus}
    	where
    		openId = #{openId}
    </update>
    
    <select id="findUserInfoByOpenId" parameterType="String" resultMap="userInfoRM">
    	select 
			ui.id id,
		 	ui.openId open_id,
		    ui.subscribe_status subscribe_status
		from 
			weixin_user_info ui
		where 
			ui.openId = #{openId};
    </select>
    
    <!-- 带分页查询所有 -->
    <select id="finUserInfoList" parameterType="UserInfoQuery" resultMap="userInfoRM">
    	select 
    		ui.id id,
		 	ui.openId open_id,
		    ui.subscribe_status subscribe_status
		from 
			weixin_user_info ui
		<include refid="userInfoLimit" />
    </select>
    <!-- 查询所有的条数 -->
    <select id="getCount" parameterType="UserInfoQuery" resultType="Integer">
		select count(1) from weixin_user_info
	</select>
</mapper>

配置文件都正确。这样就会出现 java.lang.IllegalArgumentException: Result Maps collection already contains value for XXX这个错误。

    解决办法是：删除Mybatis.xml中的<mappers>标签所有内容。因为如果user-mapper.xml与namespace的接口在同一路径下，就不需要在mybaits.xml中再进行配置了，也无需进行扫描。