Spring + Mybatis Sqlsession Mapped Statements集合不包含映射/ UserMapper.getUserById的值

Question

当我使用juit测试时，Spring Mybatis选择用户找到了这个。

• UserMapper.xml命名空间是正确的

• sqlSessionFactory是对的

但无法找到问题。

我的目录结构是：

    import com.f.dao.UserMapper;
    import com.f.dao.impl.UserDaoImpl;
    import org.junit.Test;
    import org.springframework.context.ApplicationContext;
    import org.springframework.context.support.ClassPathXmlApplicationContext;

    public class TestUserMapper {
        @Test
        public void addUser() {
            ApplicationContext context = new ClassPathXmlApplicationContext("spring-context.xml");
            UserMapper userMapper = (UserDaoImpl) context.getBean("userDaoImpl");
            System.out.println(userMapper.getUserById(1));
        }
    }

我在sqlSession.selectOne("mapping/UserMapper.getUserById", id);上使用调试程序跟踪 捕获错误：

org.mybatis.spring.MyBatisSystemException: nested exception is org.apache.ibatis.exceptions.PersistenceException: 
### Error querying database.  Cause: java.lang.IllegalArgumentException: Mapped Statements collection does not contain value for mapping/UserMapper.getUserById
### Cause: java.lang.IllegalArgumentException: Mapped Statements collection does not contain value for mapping/UserMapper.getUserById

这是摘要配置文件 spring-context.xml

Datasource配置似乎是对的 UserMapper.xml

<?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.f.dao.UserMapper">
    <insert id="insertUser" parameterType="User">
        INSERT INTO users(user_name, passwd, email)
        VALUES (#{userName}, #{password}, #{email})
    </insert>

    <resultMap id="getUserByIdUserResult" type="User">
        <id property="id" column="id"/>
        <result property="email" column="email"/>
        <result property="userName" column="user_name"/>
        <result property="password" column="passwd"/>
    </resultMap>
    <select id="getUserById" parameterType="int" resultMap="getUserByIdUserResult">
        SELECT id, user_name, passwd, email FROM users
        WHERE id = #{id}
    </select>
</mapper>

UserMapper.java

public interface UserMapper {
    public int insertUser(User user);

    public User getUserById(@Param("id") int id);
}