学习mybatis-使用代码生成器

Posted 2022-10-08 yangs-blog

1.pom.xml文件中的配置

<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.apache.org/xsd/maven-4.0.0.xsd">
    <modelVersion>4.0.0</modelVersion>
    <groupId>cn.edu.xcu</groupId>
    <artifactId>mybatis_generator</artifactId>
    <version>0.0.1-SNAPSHOT</version>
　　<!--更改jdk默认版本，解决字符编码问题-->
    <properties>
        <maven.compiler.source>1.8</maven.compiler.source>
        <maven.compiler.target>1.8</maven.compiler.target>
        <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
    </properties>
    <dependencies>
        <!-- mybatis依赖 -->
        <!-- https://mvnrepository.com/artifact/org.mybatis/mybatis -->
        <dependency>
            <groupId>org.mybatis</groupId>
            <artifactId>mybatis</artifactId>
            <version>3.5.2</version>
        </dependency>

        <!-- 数据库驱动依赖 -->
        <dependency>
            <groupId>mysql</groupId>
            <artifactId>mysql-connector-java</artifactId>
            <version>5.1.46</version>
        </dependency>
        <dependency>
            <groupId>org.apache.logging.log4j</groupId>
            <artifactId>log4j-core</artifactId>
            <version>2.6.2</version>
        </dependency>
        <dependency>
            <groupId>org.apache.logging.log4j</groupId>
            <artifactId>log4j-slf4j-impl</artifactId>
            <version>2.6.2</version>
        </dependency>
    </dependencies>
    <build>
        <plugins>
            <!-- 使用maven插件 -->
            <plugin>
                <groupId>org.mybatis.generator</groupId>
                <artifactId>mybatis-generator-maven-plugin</artifactId>
                <version>1.3.7</version>
                <dependencies>
                    <dependency>
                        <groupId>mysql</groupId>
                        <artifactId>mysql-connector-java</artifactId>
                        <version>5.1.46</version>
                    </dependency>
                </dependencies>
            </plugin>
        </plugins>
    </build>
</project>

2.更新项目

3./src/main/resources文件夹下创建generatorConfig.xml

4.配置generatorConfig.xml

<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE generatorConfiguration PUBLIC "-//mybatis.org//DTD MyBatis Generator
Configuration 1.0//EN" "http://mybatis.org/dtd/mybatis-generator-config_1_0.dtd">
<generatorConfiguration>
    <context id="context1" targetRuntime="MyBatis3">
        <!-- 1 链接到数据库的信息 -->
        <jdbcConnection
            connectionURL="jdbc:mysql://localhost:3306/xcxy"<!--数据库名-->
            driverClass="com.mysql.jdbc.Driver" password="" userId="root" />
        <!-- 2 配置实体类包 -->
        <javaModelGenerator
            targetPackage="cn.edu.xcxy.entity"
            targetProject="./src/main/java" />
        <!-- 3 如果产生映射文件，放置在那里 -->
        <sqlMapGenerator
            targetPackage="cn.edu.xcxy.mapper"
            targetProject="./src/main/resources" />
        <!-- 4 Mapper(注解)
　　　　　　注解版本：ANNOTATEDMAPPER
　　　　　　XML版本：XMLMAPPER
　　　　　　混合版本：MIXEDMAPPER

　　　　 -->
        <javaClientGenerator
            targetPackage="cn.edu.xcxy.mapper"
            targetProject="./src/main/java" type="ANNOTATEDMAPPER" />
        <!-- 5 读取那张表 -->
        <table schema="xcxy" tableName="t_type"></table>
        <table schema="xcxy" tableName="t_book"></table>
    </context>
</generatorConfiguration>

5.右键点击项目名——>Run As——>Run Configurations——>Maven Build——>New——>选择workspace为当前项目 Goals：mybatis-generator:generate ——>Run