八、持久层框架（MyBatis）

 1、首先是配置文件Category.xml修改

　　一次性修改配置文件Category.xml，提供CRUD对应的sql语句。

<?xml version="1.0" encoding="utf-8"?>
<!DOCTYPE mapper
    PUBLIC "-//mybatis.rog//DTD Mapper 3.0//EN"
    "http://mybatis.org/dtd/mybatis-3-mapper.dtd">
    
    <mapper namespace="com.demo.pojo">
        <insert id="addCategory" parameter Type="Category">
            insert into category_table  (name) values (#{name})
        </insert>
        <delete id="deleteCategory" parameter Type="Category">
            delete from category_table where id=#{id}
        </delete>
        <select id="getCategory" parameter Type="Category">
            select * from category_table where id=#{id}
        </select>
        <update id="updateCategory" parameter Type="Category">
            update category_table set name=#{name} where id=#{id}
        </update>
        <select id="listCategory" resultType="Category">
            select * from category_table
        </select>
    </mapper>

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