Spring boot笔记2

一.一些常用的配置

1.1 添加scope=import的依赖

org.springframework.bootspring-boot-dependencies1.4.3.RELEASEpomimport

1.2 修改jdk的编译版本

修改pom.xml文件

1.8

1.3 禁用特定的自动配置

使用@EnableAutoConfiguation的exclude属性即可完成:

@Configuration

@ComponentScan

@EnableAutoConfiguration(exclude={DataSourceAutoConfiguration.class})publicclass MyConfiguration {

      publicstaticvoid main(String[] args) {

      SpringApplication.run(MyConfiguration.class,args);

}

}

1.4@SpringBootApplication注解

@springbootapplication注解:它相当于以默认属性使用@Configuration, @EnableAutoConfiguration 和@ComponentScan

可以用于简化开发.

二. SpringBoot的热部署插件spring-boot-devtools

2.1 添加maven依赖

org.springframework.bootspring-boot-devtoolstruetrue

2.2 修改maven插件.添加配置.

org.springframework.bootspring-boot-maven-plugintrue

2.3 重新启动

三.Spring整合mybatis

3.1 引入mybatis的依赖

org.mybatis.spring.bootmybatis-spring-boot-starter1.1.1

3.2 在Application类上面声明Mapper包的扫描

 3.3 application.properties中书写数据源

##c3p0

c3p0.jdbcUrl=jdbc:mysql://localhost:3306/test?useUnicode=true&characterEncoding=utf8

c3p0.user=root

c3p0.password=root

c3p0.driverClass=com.mysql.jdbc.Driver

spring.datasource.type=com.mchange.v2.c3p0.ComboPooledDataSource

3.4 建立mybatis的配置类,配置c3p0数据源和sessionfactory

@Configurationpublicclass DataSourceConfig {

    @Bean(name = "dataSource")

    @Primary

    @ConfigurationProperties(prefix = "c3p0")

    public DataSource dataSource(){

        returnDataSourceBuilder.create().type(com.mchange.v2.c3p0.ComboPooledDataSource.class).build();

    }

    @Bean

    public SqlSessionFactoryBean sqlSessionFactory() {

        SqlSessionFactoryBean bean=new SqlSessionFactoryBean();

        bean.setDataSource(dataSource());

        return bean;

    }

}

3.5 编写Mapper借口和Mapper配置文件

        SELECT * FROM dog;

   

        SELECT * FROM dog WHERE id=#{id};

   

        INSERT INTO dog(age,name) VALUES(#{age},#{name});   

   

3.6 编写service

注意涉及到增删改的操作需要用@Transactional开启事务

@Servicepublicclass DogService {

    @Autowired

    private DogMapper dogMapper;

    public Dog findById(Integer id) {

        return dogMapper.findById(id);

    }

    publicList findAll() {

        return dogMapper.findAllDogs();

    }

    @Transactional

    publicvoid saveDog(Dog dog) {

        dogMapper.saveDog(dog);

    }

}

3.7 编写Controller

@Controllerpublicclass DogController {

    @Autowired

    private DogService dogService;

    @RequestMapping("/findById/{id}")

    @ResponseBody

    publicDog findDogById(@PathVariable("id") Integer id) {

        return dogService.findById(id);

    }

    @RequestMapping("/findAll")

    @ResponseBody

    publicList findAll() {

        return dogService.findAll();

    }

    @RequestMapping("/saveDog/{name}/{age}")

    publicString saveDog(@PathVariable("name")String name,@PathVariable("age")String age) {

        Dog dog=new Dog();

        dog.setName(name);

        dog.setAge(age);

        dogService.saveDog(dog);

        return"addSuccess";

    }

}

运行Application进行测试