目录

• 三者实现对比
  • 使用fluent mybatis 来实现上面的功能
  • 换成mybatis原生实现效果
  • 换成mybatis plus实现效果
• 生成代码编码比较
  • fluent mybatis生成代码设置
  • mybatis plus代码生成设置
• FluentMybatis特性一览
• 三者对比总结
• Fluent Mybatis介绍和源码

create table `student_score`(    id           bigint auto_increment comment "主键ID" primary key,    student_id   bigint            not null comment "学号",    gender_man   tinyint default 0 not null comment "性别, 0:女; 1:男",    school_term  int               null comment "学期",    subject      varchar(30)       null comment "学科",    score        int               null comment "成绩",    gmt_create   datetime          not null comment "记录创建时间",    gmt_modified datetime          not null comment "记录最后修改时间",    is_deleted   tinyint default 0 not null comment "逻辑删除标识") engine = InnoDB default charset=utf8;

select school_term,       subject,       count(score) as count,       min(score)   as min_score,       max(score)   as max_score,       avg(score)   as max_scorefrom student_scorewhere school_term >= 2000  and subject in ("英语", "数学", "语文")  and score >= 60  and is_deleted = 0group by school_term, subjecthaving count(score) > 1order by school_term, subject;

public interface MyStudentScoreMapper {    List<Map<String, Object>> summaryScore(SummaryQuery paras);}

@Data@Accessors(chain = true)public class SummaryQuery {    private Integer schoolTerm;    private List<String> subjects;    private Integer score;    private Integer minCount;}

<select id="summaryScore" resultType="map" parameterType="cn.org.fluent.mybatis.springboot.demo.mapper.SummaryQuery">    select school_term,    subject,    count(score) as count,    min(score) as min_score,    max(score) as max_score,    avg(score) as max_score    from student_score    where school_term >= #{schoolTerm}    and subject in    <foreach collection="subjects" item="item" open="(" close=")" separator=",">        #{item}    </foreach>    and score >= #{score}    and is_deleted = 0    group by school_term, subject    having count(score) > #{minCount}    order by school_term, subject</select>

@RunWith(SpringRunner.class)@SpringBootTest(classes = QuickStartApplication.class)public class MybatisDemo {    @Autowired    private MyStudentScoreMapper mapper;    @Test    public void mybatis_demo() {        // 构造查询参数        SummaryQuery paras = new SummaryQuery()            .setSchoolTerm(2000)            .setSubjects(Arrays.asList("英语", "数学", "语文"))            .setScore(60)            .setMinCount(1);        List<Map<String, Object>> summary = mapper.summaryScore(paras);        System.out.println(summary);    }}

public class AppEntityGenerator {    static final String url = "jdbc:mysql://localhost:3306/fluent_mybatis_demo?useSSL=false&useUnicode=true&characterEncoding=utf-8";    public static void main(String[] args) {        FileGenerator.build(Abc.class);    }    @Tables(        /** 数据库连接信息 **/        url = url, username = "root", password = "password",        /** Entity类parent package路径 **/        basePack = "cn.org.fluent.mybatis.springboot.demo",        /** Entity代码源目录 **/        srcDir = "spring-boot-demo/src/main/java",        /** Dao代码源目录 **/        daoDir = "spring-boot-demo/src/main/java",        /** 如果表定义记录创建，记录修改，逻辑删除字段 **/        gmtCreated = "gmt_create", gmtModified = "gmt_modified", logicDeleted = "is_deleted",        /** 需要生成文件的表 ( 表名称:对应的Entity名称 ) **/        tables = @Table(value = {"student_score"})    )    static class Abc {    }}

public class CodeGenerator {    static String dbUrl = "jdbc:mysql://localhost:3306/fluent_mybatis_demo?useSSL=false&useUnicode=true&characterEncoding=utf-8";    @Test    public void generateCode() {        GlobalConfig config = new GlobalConfig();        DataSourceConfig dataSourceConfig = new DataSourceConfig();        dataSourceConfig.setDbType(DbType.MYSQL)            .setUrl(dbUrl)            .setUsername("root")            .setPassword("password")            .setDriverName(Driver.class.getName());        StrategyConfig strategyConfig = new StrategyConfig();        strategyConfig            .setCapitalMode(true)            .setEntityLombokModel(false)            .setNaming(NamingStrategy.underline_to_camel)            .setColumnNaming(NamingStrategy.underline_to_camel)            .setEntityTableFieldAnnotationEnable(true)            .setFieldPrefix(new String[]{"test_"})            .setInclude(new String[]{"student_score"})            .setLogicDeleteFieldName("is_deleted")            .setTableFillList(Arrays.asList(                new TableFill("gmt_create", FieldFill.INSERT),                new TableFill("gmt_modified", FieldFill.INSERT_UPDATE)));        config            .setActiveRecord(false)            .setIdType(IdType.AUTO)            .setOutputDir(System.getProperty("user.dir") + "/src/main/java/")            .setFileOverride(true);        new AutoGenerator().setGlobalConfig(config)            .setDataSource(dataSourceConfig)            .setStrategy(strategyConfig)            .setPackageInfo(                new PackageConfig()                    .setParent("com.mp.demo")                    .setController("controller")                    .setEntity("entity")            ).execute();    }}