spring boot + mybatis 環境搭建

• maven 項目的jar包引入

  <dependencies>
  
     <dependency>
       <groupId>junit</groupId>
       <artifactId>junit</artifactId>
       <version>4.11</version>
       <scope>test</scope>
     </dependency>
  
    <dependency>
      <groupId>org.springframework.boot</groupId>
      <artifactId>spring-boot-starter-web</artifactId>
    </dependency>
  
    <dependency>
      <groupId>org.springframework.boot</groupId>
      <artifactId>spring-boot-starter-thymeleaf</artifactId>
    </dependency>
  
    <dependency>
      <groupId>org.springframework.boot</groupId>
      <artifactId>spring-boot-starter-jdbc</artifactId>
    </dependency>
  
    <dependency>
      <groupId>org.springframework.boot</groupId>
      <artifactId>spring-boot-starter-actuator</artifactId>
    </dependency>
  
    <dependency>
      <groupId>org.mybatis</groupId>
      <artifactId>mybatis-spring</artifactId>
      <version>1.2.2</version>
    </dependency>
  
    <dependency>
      <groupId>org.mybatis</groupId>
      <artifactId>mybatis</artifactId>
      <version>3.2.8</version>
    </dependency>
  
    <dependency>
      <groupId>org.apache.tomcat</groupId>
      <artifactId>tomcat-jdbc</artifactId>
    </dependency>
  
    <dependency>
      <groupId>com.oracle</groupId>
      <artifactId>ojdbc6</artifactId>
      <version>11.2.0.1.0</version>
    </dependency>
  
    <dependency>
      <groupId>com.alibaba</groupId>
      <artifactId>fastjson</artifactId>
      <version>1.1.43</version>
    </dependency>                                                                    
  </dependencies>
   
  

• 構造maven項目結構

• 

•   Java
        |_contrille 控制層
        |_mapper 存放DAO 運用的是mybatis所以存放的都是接口
        |_model 實體類
        |_services 業務層
        |_Application.java  是 springBoot 啟動入口
    resources
        |_mybatis 存放mapper.xml 配置文件 ,主要的是讀取這個文件過後創  建DAO的實現類
        |_templates 存放頁面
        |_Application.properties 配置文件 數據庫連接參數
   
  

• Application.java 入口類

    @EnableAutoConfiguration
  
    /*讀取配置文件的路勁,在啟動的時候自動加載該路徑下的類到Spring容器中*/
    @SpringBootApplication
  
    @ComponentScan
    /*掃描 具有 Controller,services,repository註解的類到容器中*/
  
    @MapperScan("com.youer.shop.inventory.mapper")
    /*直接指定要掃描的mapper,這樣在mapper接口上就不用一個個加@Mapper*/
  
    public class Application {
        @Bean
        @ConfigurationProperties(prefix="spring.datasource")
        /*加載配置信息,Application.porperties*/
        public DataSource dataSource() {
            return new org.apache.tomcat.jdbc.pool.DataSource();
        }
  
        @Bean
        /*數據連接*/
        public SqlSessionFactory sqlSessionFactoryBean() throws Exception {
            SqlSessionFactoryBean sqlSessionFactoryBean = new SqlSessionFactoryBean();
            sqlSessionFactoryBean.setDataSource(dataSource());
            PathMatchingResourcePatternResolver resolver = new PathMatchingResourcePatternResolver();
     sqlSessionFactoryBean.setMapperLocations(resolver.getResources("classpath:/mybatis/*.xml"));
            return sqlSessionFactoryBean.getObject();
        }
  
        @Bean
        /*事務*/
        public PlatformTransactionManager transactionManager() {
            return new DataSourceTransactionManager(dataSource());
        }
  
        public static void main(String[] args) {
            SpringApplication.run(Application.class, args);
        }
    }    

• mapper.xml 的格式

      <?xml version="1.0" encoding="UTF-8"?>
      <!DOCTYPE mapper PUBLIC "-//mybatis.org//DTD Mapper 3.0//EN"
                                    "http://mybatis.org/dtd/mybatis-3-mapper.dtd">
        <mapper namespace="com.youer.shop.inventory.mapper.UserMapper">
  
        </mapper>

• 後續獎和redis整合 搭建一個分布式換成架構

    redis依賴
    <dependency>
         <groupId>redis.clients</groupId>
         <artifactId>jedis</artifactId>
    </dependency>

spring-boot + mybatis 搭建