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与xml的不同点是 1.xml是通过xml文件对操作类方法进行填写 <mapper namespace="com.itheima1.dao.IUserDao"> <!--配置查询所有--> <select id="findAll" resultType="com.itheima1.domain.User"> select * from user </select> <!--id为方法名--> <

创建Maven工程并导入坐标 <?xml version="1.0" encoding="UTF-8"?> <project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.a.