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15.springboot:集成MyBatis

15.springboot:集成MyBatis

作者: AiPuff | 来源:发表于2017-02-12 23:25 被阅读52次
    Paste_Image.png

    操作步骤

    (1)新建maven project;
    (2)在pom.xml文件中引入相关依赖;
    (3)创建启动类App.java
    (4)在application.properties添加配置文件;
    (5)编写Demo测试类;
    (6)编写DemoMapper;
    (7)编写DemoService
    (8)编写DemoController;
    (9)加入PageHelper
    (10)获取自增长ID;
    

    (1)新建maven project;

    新建一个maven project,取名为:spring-boot-mybatis

    (2)在pom.xml文件中引入相关依赖

    (1)基本依赖,jdk版本号;
    (2)mysql驱动,mybatis依赖包,mysql分页PageHelper:
    
    <!-- mysql 数据库驱动. -->
        <dependency>
            <groupId>mysql</groupId>
            <artifactId>mysql-connector-java</artifactId>
    </dependency>   
    <!--    
                spring-boot mybatis依赖:
                
                请不要使用1.0.0版本,因为还不支持拦截器插件,
                1.1.1 是博主写帖子时候的版本,大家使用最新版本即可
             -->
        <dependency>
            <groupId>org.mybatis.spring.boot</groupId>
            <artifactId>mybatis-spring-boot-starter</artifactId>
            <version>1.1.1</version>
        </dependency>
        <!-- 
            MyBatis提供了拦截器接口,我们可以实现自己的拦截器,
            将其作为一个plugin装入到SqlSessionFactory中。 
            Github上有位开发者写了一个分页插件,我觉得使用起来还可以,挺方便的。 
            Github项目地址: https://github.com/pagehelper/Mybatis-PageHelper
         -->    
        <dependency>
            <groupId>com.github.pagehelper</groupId>
            <artifactId>pagehelper</artifactId>
            <version>4.1.0</version>
        </dependency>   
    

    (3)创建启动类App.java

    @SpringBootApplication
    @MapperScan("com.kfit.*.mapper")
    public class App {
        public static void main(String[] args) {
            SpringApplication.run(App.class, args);
        }
    }
    
    //这里和以往不一样的地方就是MapperScan的注解,这个是会扫描该包下的接口
    

    (4)在application.properties添加配置文件

    ########################################################
    ###datasource
    ########################################################
    spring.datasource.url = jdbc:mysql://localhost:3306/test
    spring.datasource.username = root
    spring.datasource.password = root
    spring.datasource.driverClassName = com.mysql.jdbc.Driver
    spring.datasource.max-active=20
    spring.datasource.max-idle=8
    spring.datasource.min-idle=8
    spring.datasource.initial-size=10
    

    (5)编写Demo测试类

    public class Demo {
        private long id;
        private String name;
          //省略getter and setter….
    }
    

    (6)编写DemoMapper

    public interface DemoMappper {
        
        @Select("select *from Demo where name = #{name}")
        public List<Demo> likeName(String name);
        
        @Select("select *from Demo where id = #{id}")
        public Demo getById(long id);
        
        @Select("select name from Demo where id = #{id}")
        public String getNameById(long id);
    }
    

    (7)编写DemoService

    @Service
    public class DemoService {
        @Autowired
        private DemoMappper demoMappper;
        
        public List<Demo> likeName(String name){
            return demoMappper.likeName(name);
        }
    }
    

    (8)编写DemoController

    @RestController
    public class DemoController {
        @Autowired
        private DemoService demoService;
        
        @RequestMapping("/likeName")
        public List<Demo> likeName(String name){
            return demoService.likeName(name);
        }
        
    }
    
    //运行访问:http://127.0.0.1:8080/likeName?name=张三  就可以看到返回的数据了
    

    (9)加入PageHelper

    @Configuration
    public class MyBatisConfiguration {
        
        @Bean
        public PageHelper pageHelper() {
            System.out.println("MyBatisConfiguration.pageHelper()");
            PageHelper pageHelper = new PageHelper();
            Properties p = new Properties();
            p.setProperty("offsetAsPageNum", "true");
            p.setProperty("rowBoundsWithCount", "true");
            p.setProperty("reasonable", "true");
            pageHelper.setProperties(p);
            return pageHelper;
        }
    }
    @RequestMapping("/likeName")
    public List<Demo> likeName(String name){
             PageHelper.startPage(1,1);
             return demoService.likeName(name);
    }
    

    (10)获取自增长ID

    @Insert("insert into Demo(name,password) values(#{name},#{password})")
    public long save(Demo name);
    @Options(useGeneratedKeys = true, keyProperty = "id", keyColumn = "id") 
    

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