springboot配置mybatis逆向工程

谁借莪１个温暖的怀抱￠ 2021-10-29 19:24 423阅读 0赞

mybatis逆向工程很早之前有用过，但是一直没有整理使用步骤，今天来回顾下在idea下springboot中整合mybatis逆向工程的实现步骤

# 什么是逆向工程？ #

所谓mybatis逆向工程，就是mybatis会根据我们设计好的数据表，自动生成pojo、mapper以及mapper.xml。本文将介绍两种方式实现mybatis的逆向工程。

# generatorConfig.xml配置文件 #

配置数据库驱动，连接以及映射

<?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>
        
        <classPathEntry  location="D:\apache-maven-3.5.4\maven-repository\mysql\mysql-connector-java\5.1.37\mysql-connector-java-5.1.37.jar"/>
        <context id="DB2Tables"  targetRuntime="MyBatis3">
            <commentGenerator>
                <property name="suppressDate" value="true"/>
                
                <property name="suppressAllComments" value="true"/>
            </commentGenerator>
            
            <jdbcConnection driverClass="com.mysql.jdbc.Driver" connectionURL="jdbc:mysql://127.0.0.1:3306/mybatis" userId="root" password="123">
            </jdbcConnection>
            
            <javaTypeResolver>
                <property name="forceBigDecimals" value="false"/>
            </javaTypeResolver>
            
            <javaModelGenerator targetPackage="com.kevin.lce.entity" targetProject="src/main/java">
                <property name="enableSubPackages" value="true"/>
                <property name="trimStrings" value="true"/>
            </javaModelGenerator>
            
            <sqlMapGenerator targetPackage="com.kevin.lce.mapper" targetProject="src/main/java">
                <property name="enableSubPackages" value="true"/>
            </sqlMapGenerator>
            
            <javaClientGenerator type="XMLMAPPER" targetPackage="com.kevin.lce.mapper" targetProject="src/main/java">
                <property name="enableSubPackages" value="true"/>
            </javaClientGenerator>
            
            <table tableName="tb_user_role"
                   domainObjectName="UserRole">
            </table>
            
                   
                   
                   
                   
                   
                   
            
        </context>
    </generatorConfiguration>

# 代码方式实现逆向工程 #

引入逆向工程依赖

<dependency>
                <groupId>org.mybatis.generator</groupId>
                <artifactId>mybatis-generator-core</artifactId>
                <version>1.3.2</version>
            </dependency>

引入插件

<plugin>
                    <groupId>org.mybatis.generator</groupId>
                    <artifactId>mybatis-generator-maven-plugin</artifactId>
                    <configuration>
                        <configurationFile>${basedir}/src/main/resources/generatorConfig.xml</configurationFile>
                        <overwrite>true</overwrite>
                        <verbose>true</verbose>
                    </configuration>
                </plugin>

xml读取

<resources>
                <resource>
                    <directory>src/main/resources</directory>
                </resource>
    
                <resource>
                    <directory>src/main/java</directory>
                    <includes>
                        <include>**/*.xml</include>
                    </includes>
                </resource>
            </resources>

手工代码实现逆向工程

@RunWith(SpringRunner.class)
    @SpringBootTest
    public class LceApplicationTests {
        
    
        @Test
        public void contextLoads() {
        
            try {
        
                generator();
            } catch (Exception e) {
        
                e.printStackTrace();
            }
        }
    
        /**
         * 代码方式实现逆向工程
         * @throws Exception
         */
        public void generator() throws Exception {
        
            List<String> warnings = new ArrayList<String>();
            boolean overwrite = true;
            // 指定配置文件
            File configFile = new File("generatorConfig.xml");
            ConfigurationParser cp = new ConfigurationParser(warnings);
            Configuration config = cp.parseConfiguration(configFile);
            DefaultShellCallback callback = new DefaultShellCallback(overwrite);
            MyBatisGenerator myBatisGenerator = new MyBatisGenerator(config, callback, warnings);
            myBatisGenerator.generate(null);
        }
    }

# maven方式启动逆向工程 #

![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3dlaXhpbl80MTkyMjI4OQ_size_16_color_FFFFFF_t_70]

![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3dlaXhpbl80MTkyMjI4OQ_size_16_color_FFFFFF_t_70 1]

![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3dlaXhpbl80MTkyMjI4OQ_size_16_color_FFFFFF_t_70 2]

mybatis-generator:generate -e

最后apply - ok

启动刚刚的maven

![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3dlaXhpbl80MTkyMjI4OQ_size_16_color_FFFFFF_t_70 3]

这样即完成

[watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3dlaXhpbl80MTkyMjI4OQ_size_16_color_FFFFFF_t_70]: /images/20211029/3f9ea5f355ae428eb1876421f334da65.png
[watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3dlaXhpbl80MTkyMjI4OQ_size_16_color_FFFFFF_t_70 1]: /images/20211029/154898ed2c904538aa51f708d2d63261.png
[watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3dlaXhpbl80MTkyMjI4OQ_size_16_color_FFFFFF_t_70 2]: /images/20211029/292e073074be46e08917cbf39386ebc8.png
[watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3dlaXhpbl80MTkyMjI4OQ_size_16_color_FFFFFF_t_70 3]: /images/20211029/1251f80b31cb4cd4a7fc2b6d3b95beec.png