SSM框架整合笔记总结[二]--Mybatis层

数据库配置文件(database.properties)

注意：sql8 和 5 版本的写法有区别

这里使用的是Sql5版本

jdbc.driver=com.mysql.jdbc.Driver
jdbc.url=jdbc:mysql://localhost:3306/ssmbuild?useSSL=false&useUnicode=true&characterEncoding=UTF8
jdbc.username=root
jdbc.password=root

mybatis配置文件(mybatis-config.xml)

<?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>
<!--    配置数据源，交给spring去做-->

    <settings>
        <setting name="logImpl" value="STDOUT_LOGGING"/>
    </settings>

    <typeAliases>
        <package name="com.kaka.pojo"/>
    </typeAliases>

</configuration>

编写POJO

@Data
@AllArgsConstructor
@NoArgsConstructor
public class Books {
    private int bookID;
    private String bookName;
    private int bookCounts;
    private String detail;
}

编写Mapper接口以及相应的Mapper.xml

public interface BookMapper {
    //增加一本书
    int addBook(Books books);

    //删除一本书
    int deleteBookById(@Param("bookID") int id);

    //更新一本书
    int updateBook(Books books);

    //查询一本书
    Books queryBookById(@Param("bookID") int id);

    //查询全部的书
    List<Books> queryAllBook();

    //根据名字查询书籍
    Books queryBookByName(@Param("bookName") String bookName);

}

<?xml version="1.0" encoding="UTF-8" ?>
<!DOCTYPE mapper
        PUBLIC "-//mybatis.org//DTD Config 3.0//EN"
        "http://mybatis.org/dtd/mybatis-3-mapper.dtd">
<mapper namespace="com.kaka.mapper.BookMapper">
    <insert id="addBook" parameterType="Books">
        insert into ssmbuild.books (bookName, bookCounts, detail)
        values (#{bookName},#{bookCounts},#{detail});
    </insert>

    <delete id="deleteBookById" parameterType="int">
        delete from ssmbuild.books where bookID = #{bookID}
    </delete>

    <update id="updateBook" parameterType="Books">
        update ssmbuild.books
        set bookName = #{bookName},bookCounts = #{bookCounts},detail = #{detail}
        where bookID = #{bookID};
    </update>

    <select id="queryBookById" resultType="Books">
        select * from ssmbuild.books
        where bookID = #{bookID};
    </select>

    <select id="queryAllBook" resultType="Books">
        select * from ssmbuild.books;
    </select>

    <select id="queryBookByName" resultType="Books">
        select * from books where bookName = #{bookName};
    </select>

</mapper>

将xml绑定到配置文件中

<mappers>
    <mapper class="com.kaka.mapper.BookMapper"/>
</mappers>

mapper的绑定也可以在spring中完成！

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