FluentMybatis实现mybatis动态sql FluentMybatis实现mybatis动态sql拼装和fluent api语法（FluentMybatis）

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<dependencies>
    <!-- 引入fluent-mybatis 运行依赖包, scope为compile -->
    <dependency>
        <groupId>com.github.atool</groupId>
        <artifactId>fluent-mybatis</artifactId>
        <version>1.3.1</version>
    </dependency>
    <!-- 引入fluent-mybatis-processor, scope设置为provider 编译需要，运行时不需要 -->
    <dependency>
        <groupId>com.github.atool</groupId>
        <artifactId>fluent-mybatis-processor</artifactId>
        <version>1.3.1</version>
    </dependency>
</dependencies>

create schema fluent_mybatis_tutorial;

create table hello_world
(
    id           bigint unsigned auto_increment primary key,
    say_hello    varchar(100) null,
    your_name    varchar(100) null,
    gmt_create   datetime   DEFAULT NULL COMMENT '创建时间',
    gmt_modified datetime   DEFAULT NULL COMMENT '更新时间',
    is_deleted   tinyint(2) DEFAULT 0 COMMENT '是否逻辑删除'
) ENGINE = InnoDB
  CHARACTER SET = utf8 comment '简单演示表';

@FluentMybatis
public class HelloWorldEntity implements IEntity {
    private Long id;

    private String sayHello;

    private String yourName;

    private Date gmtCreate;

    private Date gmtModified;

    private Boolean isDeleted;
    
    // get, set, toString 方法
}

@ComponentScan(basePackages = "cn.org.atool.fluent.mybatis.demo1")
@MapperScan("cn.org.atool.fluent.mybatis.demo1.entity.mapper")
@Configuration
public class HelloWorldConfig {
    /**
     * 设置dataSource属性
     *
     * @return
     */
    @Bean
    public DataSource dataSource() {
        BasicDataSource dataSource = new BasicDataSource();
        dataSource.setDriverClassName("com.mysql.jdbc.Driver");
        dataSource.setUrl("jdbc:mysql://localhost:3306/fluent_mybatis_tutorial?useUnicode=true&characterEncoding=utf8");
        dataSource.setUsername("root");
        dataSource.setPassword("password");
        return dataSource;
    }

    /**
     * 定义mybatis的SqlSessionFactoryBean
     *
     * @param dataSource
     * @return
     */
    @Bean
    public SqlSessionFactoryBean sqlSessionFactoryBean(DataSource dataSource) {
        SqlSessionFactoryBean bean = new SqlSessionFactoryBean();
        bean.setDataSource(dataSource);
        return bean;
    }
}

@RunWith(SpringJUnit4ClassRunner.class)
@ContextConfiguration(classes = HelloWorldConfig.class)
public class HelloWorldTest {
    /**
     * fluent mybatis编译时生成的Mapper类
     */
    @Autowired
    HelloWorldMapper mapper;

    @Test
    public void testHelloWorld() {
        /**
         * 为了演示方便，先删除数据
         */
        mapper.delete(mapper.query()
            .where.id().eq(1L).end());
        /**
         * 插入数据
         */
        HelloWorldEntity entity = new HelloWorldEntity();
        entity.setId(1L);
        entity.setSayHello("hello world");
        entity.setYourName("fluent mybatis");
        entity.setIsDeleted(false);
        mapper.insert(entity);
        /**
         * 查询 id = 1 的数据
         */
        HelloWorldEntity result1 = mapper.findOne(mapper.query()
            .where.id().eq(1L).end());
        /**
         * 控制台直接打印出查询结果
         */
        System.out.println("1. HelloWorldEntity:" + result1.toString());
        /**
         * 更新id = 1的记录
         */
        mapper.updateBy(mapper.updater()
            .update.sayHello().is("say hello, say hello!")
            .set.yourName().is("fluent mybatis is powerful!").end()
            .where.id().eq(1L).end()
        );
        /**
         * 查询 id = 1 的数据
         */
        HelloWorldEntity result2 = mapper.findOne(mapper.query()
            .where.sayHello().like("hello")
            .and.isDeleted().eq(false).end()
            .limit(1)
        );
        /**
         * 控制台直接打印出查询结果
         */
        System.out.println("2. HelloWorldEntity:" + result2.toString());
    }
}