老师 做对照了一下我的mapper里面的配置，没有找到getProductCategoryList，我的xml文件是这样的：

<?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.graduate.o2o.dao.ProductCategoryDao">
	<!-- 目的：为dao接口方法提供sql语句配置 -->
	<select id="queryProductCategoryList" resultType="com.graduate.o2o.entity.ProductCategory"
		parameterType="Long">
		<!-- 具体的sql -->
		SELECT
		product_category_id,
		product_category_name,
		priority,
		create_time,
		shop_id
		FROM
		tb_product_category
		WHERE
		shop_id = #{shopId}
		ORDER BY
		priority DESC
	</select>
	<insert id="batchInsertProductCategory" parameterType="java.util.List">
		INSERT INTO
		tb_product_category(product_category_name, priority,
		create_time, shop_id)
		VALUES
		<foreach collection="list" item="productCategory" index="index"
			separator=",">
			(
			#{productCategory.productCategoryName},
			#{productCategory.priority},
			#{productCategory.createTime},
			#{productCategory.shopId}
			)
		</foreach>
	</insert>
	<delete id="deleteProductCategory">
		DELETE FROM
		tb_product_category
		WHERE
		product_category_id = #{productCategoryId}
		AND shop_id = #{shopId}
	</delete>
</mapper>	

报错：
java.lang.IllegalStateException: Failed to load ApplicationContext
Caused by: org.springframework.beans.factory.UnsatisfiedDependencyException: Error creating bean with name ‘productCategoryServiceImpl’: Unsatisfied dependency expressed through method ‘getProductCategoryList’ parameter 0; nested exception is org.springframework.beans.factory.NoSuchBeanDefinitionException: No qualifying bean of type ‘long’ available: expected at least 1 bean which qualifies as autowire candidate. Dependency annotations: {}

我又测试了以前写好的单元测试，发现以前写好的现在也运行不了了，也是显示这样的错误。不知道怎么改TAT