SpringBoot集成MyMatis-Generator的使用方法

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SpringBoot集成MyMatis-Generator

1.使用Spring Initializr創建SpringBoot項目

POM依賴

    <dependencies>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-web</artifactId>
        </dependency>
        <dependency>
            <groupId>org.mybatis.spring.boot</groupId>
            <artifactId>mybatis-spring-boot-starter</artifactId>
            <version>2.1.3</version>
        </dependency>

        <dependency>
            <groupId>mysql</groupId>
            <artifactId>mysql-connector-java</artifactId>
            <scope>runtime</scope>
            <version>5.1.40</version>
        </dependency>

        <dependency>
            <groupId>org.projectlombok</groupId>
            <artifactId>lombok</artifactId>
            <optional>true</optional>
        </dependency>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-test</artifactId>
            <scope>test</scope>
            <exclusions>
                <exclusion>
                    <groupId>org.junit.vintage</groupId>
                    <artifactId>junit-vintage-engine</artifactId>
                </exclusion>
            </exclusions>
        </dependency>
    </dependencies>

2. 配置application.yml 

根據實際數據源配置

spring:
  datasource:
    driver-class-name: com.mysql.jdbc.Driver
    url: jdbc:mysql://localhost:3306/spring_mybatis_dljd?useUnicode=true&characterEncoding=UTF-8&zeroDateTimeBehavior=convertToNull&serverTimezone=GMT%2B8&useSSL=false
    username: root
    password: 123456

3. POM中增加插件坐標

<build>
        <plugins>
            <plugin>
                <groupId>org.springframework.boot</groupId>
                <artifactId>spring-boot-maven-plugin</artifactId>
            </plugin>
            <plugin>
                <groupId>org.mybatis.generator</groupId>
                <artifactId>mybatis-generator-maven-plugin</artifactId>
                <version>1.4.0</version>
                <dependencies>
                    <dependency>
                        <groupId>mysql</groupId>
                        <artifactId>mysql-connector-java</artifactId>
                        <version>5.1.40</version>
                    </dependency>
                </dependencies>
                <!--指定配置文件的路徑-->
                <configuration>
                    <!-- 配置文件路徑 -->
                    <configurationFile>${project.basedir}/src/main/resources/generatorConfig.xml</configurationFile>
                    <overwrite>true</overwrite>
                    <verbose>true</verbose>
                </configuration>
            </plugin>
        </plugins>
        <!--
        sql 映射文件 放在 代碼中時需要配置
        此處掃描 src/main/java 中所有xml文件發布時導入resources中。
        因為用了資源配置重寫了系統默認的配置，必須配置yml和properties文件
        -->
        <resources>
            <resource>
                <directory>src/main/java</directory>
                <includes>
                    <include>**/*.xml</include>
                </includes>
            </resource>
            <resource>
                <directory>src/main/resources</directory>
                <includes>
                    <include>**/*.yml</include>
                    <include>**/*.properties</include>
                </includes>
            </resource>
        </resources>
    </build>

注意：

1. 插件中使用的 mysql-connector-java 與application.yml 中保持一致

2.configurationFile 中指定了生成器配置文件 generatorConfig.xml的位置

3.發布時為了將mapper包中sql映射文件xml 導入資源文件中，加入resources。因此導致重新了默認的資源配置，需要額外導入*.yml,*.properties

4. 創建生成器配置文件

路徑：

src\main\resources\generatorConfig.xml

內容：

<?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="context" targetRuntime="MyBatis3">
        <commentGenerator>
            <property name="suppressAllComments" value="false"/>

        </commentGenerator>

        <!-- !!!! Database Configurations !!!! -->
        <jdbcConnection driverClass="com.mysql.jdbc.Driver"
                        connectionURL="jdbc:mysql://localhost:3306/spring_mybatis_dljd?useUnicode=true&amp;characterEncoding=UTF-8&amp;zeroDateTimeBehavior=convertToNull&amp;serverTimezone=GMT%2B8&amp;useSSL=false&amp;nullCatalogMeansCurrent=true"
                        userId="root"
                        password="123456"/>

        <javaTypeResolver>
            <property name="forceBigDecimals" value="false"/>
        </javaTypeResolver>

        <!-- !!!! Model Configurations !!!! -->
        <javaModelGenerator targetPackage="com.zhl.springmybatis.pojo" targetProject="src/main/java">
            <property name="enableSubPackages" value="false"/>
            <property name="trimStrings" value="true"/>
        </javaModelGenerator>

        <!-- !!!! Mapper XML Configurations !!!! -->
        <sqlMapGenerator targetPackage="com.zhl.springmybatis.mapper" targetProject="src/main/java">
            <property name="enableSubPackages" value="false"/>
        </sqlMapGenerator>

        <!-- !!!! Mapper Interface Configurations !!!! -->
        <javaClientGenerator targetPackage="com.zhl.springmybatis.mapper" targetProject="src/main/java"
                             type="XMLMAPPER">
            <property name="enableSubPackages" value="false"/>
        </javaClientGenerator>

        <!-- !!!! Table Configurations !!!! -->
<!--        <table tableName="users"

               enableCountByExample="false" enableDeleteByExample="false" enableSelectByExample="false"
               enableUpdateByExample="false"/>-->
        <table tableName="%">
            <generatedKey column="id" sqlStatement="Mysql"/>
        </table>
    </context>
</generatorConfiguration>

1. javaModelGenerator 實體和Example文件指定位置

2. sqlMapGenerator SQL映射文件*.Mapper.xml 所在位置

3. javaClientGenerator 接口文件所在位置

4. tableName="%" 為生成所有表

 jdbcConnection driverClass ：需與application.yml中保持一致

5. 測試生成結果

5.1 點擊

5.2 .  生成

6. 在啟動類中配置掃描接口與映射配置文件

@SpringBootApplication@MapperScan("com.zhl.springmybatis.mapper")public class SpringMybatisApplication {public static void main(String[] args) {
        SpringApplication.run(SpringMybatisApplication.class, args);
    }

}

7. 對生成的實體增加toString（）方便測試，生成的Mapper接口 Example不用動

@Data
@ToString
public class Student {....}

9.編寫Service及ServiceImpl

StudentService:

package com.zhl.springmybatis.service;

import com.zhl.springmybatis.pojo.Student;

import java.util.List;

public interface StudentService {
    List<Student> getList();
}

StudentServiceImpl

@Service
public class StudentServiceImpl implements StudentService {
    @Resource
    private StudentMapper studentMapper;

    @Override
    public List<Student> getList() {
        StudentExample studentExample=new StudentExample();
        List<Student> list= studentMapper.selectByExample(studentExample);
        for (Student s:list) {
            System.out.println(s);
        }

        return list;
    }
}

10. 測試類

這里引用 Mapper接口 使用 @Resource 避免出現警告紅線。

@SpringBootTest
class SpringMybatisApplicationTests {

    @Resource
    private StudentMapper studentMapper;
    @Test
    void contextLoads() {
    }

    @Test
    public void GetList(){
        StudentExample studentExample=new StudentExample();
        List<Student> list= studentMapper.selectByExample(studentExample);
        for (Student s:list) {
            System.out.println(s);
        }


    }

}

11. 測試結果

12.  解決dtd文件紅標問題

12.1.根據約束文件地址下載文件到本地

mybatis-3-mapper.dtd

mybatis-generator-config_1_0.dtd

12.2.  IDEA中設置

路徑 File | Settings | Languages & Frameworks | Schemas and DTDs

URI         為 網絡地址

Location 為 本地文件地址

13. 編譯時問題 程序包org.apache.ibatis.annotations不存在

pom中引入

<!-- https://mvnrepository.com/artifact/org.apache.ibatis/ibatis-core -->
<dependency>
	<groupId>org.apache.ibatis</groupId>
	<artifactId>ibatis-core</artifactId>
	<version>3.0</version>
</dependency>

感謝各位的閱讀，以上就是“SpringBoot集成MyMatis-Generator的使用方法”的內容了，經過本文的學習后，相信大家對SpringBoot集成MyMatis-Generator的使用方法這一問題有了更深刻的體會，具體使用情況還需要大家實踐驗證。這里是億速云，小編將為大家推送更多相關知識點的文章，歡迎關注！