学习笔记——Mybatis动态SQL

2023-01-12

一、Mybatis动态SQL

即将SQL动态化

同时Mybatis的动态SQL支持OFNL表达式，OGNL（Object Graph Navigation Language）对象图导航语言。

1、先搭建环境

（1）创建一个“maven”模块，命名为“day04_mybatis”

（2）在“day04_mybatis”中的“pom.xml”中的<project>标签内部添加依赖，即添加jar包

<dependencies>
        <!-- https://mvnrepository.com/artifact/mysql/mysql-connector-java -->
        <dependency>
            <groupId>mysql</groupId>
            <artifactId>mysql-connector-java</artifactId>
            <version>8.0.26</version>
        </dependency>

        <!-- https://mvnrepository.com/artifact/org.mybatis/mybatis -->
        <dependency>
            <groupId>org.mybatis</groupId>
            <artifactId>mybatis</artifactId>
            <version>3.5.6</version>
        </dependency>

        <!-- https://mvnrepository.com/artifact/junit/junit -->
        <dependency>
            <groupId>junit</groupId>
            <artifactId>junit</artifactId>
            <version>4.12</version>
            <scope>test</scope>
        </dependency>

        <!-- https://mvnrepository.com/artifact/log4j/log4j -->
        <dependency>
            <groupId>log4j</groupId>
            <artifactId>log4j</artifactId>
            <version>1.2.17</version>
        </dependency>


    </dependencies>