在SpringBoot项目里面生成Mybatis注解代码

复习：全面使用注解，Mybatis自动生成代码。

1.maven里面的重要依赖库

<dependency>

<groupId>org.mybatis.spring.boot</groupId>

<artifactId>mybatis-spring-boot-starter</artifactId>

<version>2.1.0</version>

</dependency>

<dependency>

<groupId>org.springframework.cloud</groupId>

<artifactId>spring-cloud-starter-netflix-hystrix-dashboard</artifactId>

</dependency>

<dependency>

<groupId>org.springframework.cloud</groupId>

<artifactId>spring-cloud-starter-sleuth</artifactId>

</dependency>

<dependency>

<groupId>org.springframework.cloud</groupId>

<artifactId>spring-cloud-starter-zipkin</artifactId>

</dependency>

<dependency>

<groupId>org.postgresql</groupId>

<artifactId>postgresql</artifactId>

<scope>runtime</scope>

</dependency>

<dependency>

<groupId>org.springframework.boot</groupId>

<artifactId>spring-boot-starter-test</artifactId>

<scope>test</scope>

</dependency>

<!-- https://mvnrepository.com/artifact/org.mybatis.generator/mybatis-generator -->

<dependency>

    <groupId>org.mybatis.generator</groupId>

    <artifactId>mybatis-generator-core</artifactId>

    <version>1.3.7</version>

</dependency>

2. 从main执行代码生成

public static void main(String[] args) {

//

List<String> warnings = new ArrayList<String>();

  boolean overwrite = true;

  //GenMain.class.getResource("generatorConfig.xml").getFile()

  File configFile = new File(GenerateMybatisCode.class.getResource("/generatorConfig.xml").getFile());

  ConfigurationParser cp = new ConfigurationParser(warnings);

  Configuration config;

try {

config = cp.parseConfiguration(configFile);

  DefaultShellCallback callback = new DefaultShellCallback(overwrite);

  MyBatisGenerator myBatisGenerator = new MyBatisGenerator(config, callback, warnings);

  myBatisGenerator.generate(null);

} catch (IOException | XMLParserException | InvalidConfigurationException | SQLException | InterruptedException e) {

// TODO Auto-generated catch block

e.printStackTrace();

}

System.out.println("========================generate the code sucess.==================");

}

Mybatis的generatorConfig.xml配置文件请参考官方github。

自动生成完的代码，比如Mapper：

@Mapper

public interface ProductMapper {

    /**

    * This method was generated by MyBatis Generator.

    * This method corresponds to the database table product

    *

    * @mbg.generated Thu Aug 01 11:10:53 CST 2019

    */

    @Delete({

        "delete from product",

        "where id = #{id,jdbcType=INTEGER}"

    })

    int deleteByPrimaryKey(Integer id);

    @Insert({

        "insert into product (product_type, ",

        "name, retail_price, ",

        "cost_price, create_time)",

        "values (#{productType,jdbcType=INTEGER}, ",

        "#{name,jdbcType=VARCHAR}, #{retailPrice,jdbcType=NUMERIC}, ",

        "#{costPrice,jdbcType=NUMERIC}, #{createTime,jdbcType=TIMESTAMP})"

    })

    int insert(Product record);

 省略若干代码。

Github代码参考