SpringBoot整合多数据源实现

项目架构

1.导入相关依赖

 <dependency>
             <groupId>org.springframework.boot</groupId>
             <artifactId>spring-boot-starter-web</artifactId>
         </dependency>

         <dependency>
             <groupId>org.springframework.boot</groupId>
             <artifactId>spring-boot-starter-test</artifactId>
             <scope>test</scope>
         </dependency>

         <!--freemarker支持-->
         <dependency>
             <groupId>org.springframework.boot</groupId>
             <artifactId>spring-boot-starter-freemarker</artifactId>
         </dependency>

         <!-- mysql驱动 -->
         <dependency>
             <groupId>mysql</groupId>
             <artifactId>mysql-connector-java</artifactId>
         </dependency>

         <!--整合mybatis-->
         <dependency>
             <groupId>org.mybatis.spring.boot</groupId>
             <artifactId>mybatis-spring-boot-starter</artifactId>
             <version>1.1.1</version>
         </dependency>

2.application.properties

 ## test1 数据源配置
 #spring.datasource.test1.driverClassName=com.mysql.jdbc.Driver
 #spring.datasource.test1.jdbc-url=jdbc:mysql://localhost:3306/test1?useUnicode=true&characterEncoding=utf8
 #spring.datasource.test1.username=root
 #spring.datasource.test1.password=123

 ## test2 数据源配置
 #spring.datasource.test2.driverClassName=com.mysql.jdbc.Driver
 #spring.datasource.test2.jdbc-url=jdbc:mysql://localhost:3306/test2?useUnicode=true&characterEncoding=utf8
 #spring.datasource.test2.username=root
 #spring.datasource.test2.password=123

3.创建datasource包  下TestMyBatisConfig1

 @Configuration
 @MapperScan(basePackages = "cn.happy.test1", sqlSessionFactoryRef =  "test1SqlSessionFactory")
 public class DataSource1Config {
         @Bean(name = "test1DataSource")
         @ConfigurationProperties(prefix = "spring.datasource.test1")
         @Primary
         public DataSource testDataSource() {
             return DataSourceBuilder.create().build();
         }

         @Bean(name = "test1SqlSessionFactory")
         @Primary
         public SqlSessionFactory testSqlSessionFactory(@Qualifier("test1DataSource") DataSource dataSource) throws Exception {
             SqlSessionFactoryBean bean = new SqlSessionFactoryBean();
             bean.setDataSource(dataSource);
             //读取mybatis小配置文件
            // bean.setMapperLocations(new PathMatchingResourcePatternResolver().getResources("classpath:mybatis/mapper/test1/*.xml"));
             return bean.getObject();
         }

         @Bean(name = "test1TransactionManager")
         @Primary
         public DataSourceTransactionManager testTransactionManager(@Qualifier("test1DataSource") DataSource dataSource) {
             return new DataSourceTransactionManager(dataSource);
         }

         @Bean(name = "test1SqlSessionTemplate")
         @Primary
         public SqlSessionTemplate testSqlSessionTemplate(@Qualifier("test1SqlSessionFactory") SqlSessionFactory sqlSessionFactory) throws Exception {
             return new SqlSessionTemplate(sqlSessionFactory);
         }
 }

@Primary注解标识默认使用的数据源

如果不加启动会报如下错误：意思是有两个数据源  不知需要使用哪个数据源

3.创建datasource包  下TestMyBatisConfig2

 @Configuration
 @MapperScan(basePackages = "cn.happy.test2", sqlSessionFactoryRef =  "test2SqlSessionFactory")
 public class DataSource2Config {
         @Bean(name = "test2DataSource")
         @ConfigurationProperties(prefix = "spring.datasource.test2")
         public DataSource testDataSource() {
             return DataSourceBuilder.create().build();
         }

         @Bean(name = "test2SqlSessionFactory")
         public SqlSessionFactory testSqlSessionFactory(@Qualifier("test2DataSource") DataSource dataSource) throws Exception {
             SqlSessionFactoryBean bean = new SqlSessionFactoryBean();
             bean.setDataSource(dataSource);
             //读取mybatis小配置文件
            // bean.setMapperLocations(new PathMatchingResourcePatternResolver().getResources("classpath:mybatis/mapper/test2/*.xml"));
             return bean.getObject();
         }

         @Bean(name = "test2TransactionManager")
         public DataSourceTransactionManager testTransactionManager(@Qualifier("test2DataSource") DataSource dataSource) {
             return new DataSourceTransactionManager(dataSource);
         }

         @Bean(name = "test2SqlSessionTemplate")
         public SqlSessionTemplate testSqlSessionTemplate(@Qualifier("test2SqlSessionFactory") SqlSessionFactory sqlSessionFactory) throws Exception {
             return new SqlSessionTemplate(sqlSessionFactory);
         }

     }

4.entity层

 /**
  * author：  刘涛
  *
  * @create 2018-04-04 11:18
  */
 public class Book {

     private Integer bookid;

     private String bookname;

     private Integer bookprice;

 get  set省略。。
 }

5.test1下的dao中BookMapperTest1

 public interface BookMapperTest1 {

     @Select("select * from book where bookname=#{bookname}")
     public Book findByName(@Param("bookname") String bookname);

     @Insert("insert into book(bookname,bookprice) values (#{bookname},#{bookprice})")
     public int insertBook(@Param("bookname") String bookname, @Param("bookprice") Double bookprice);

     @Select("select * from book")
     public Book findBook(@Param("Book") Book book);
 }

6.test2下的dao中BookMapperTest2

 public interface BookMapperTest2 {

     @Select("select * from book where bookname=#{bookname}")
     public Book findByName(@Param("bookname") String bookname);

     @Insert("insert into book(bookname,bookprice) values (#{bookname},#{bookprice})")
     public int insertBook(@Param("bookname") String bookname, @Param("bookprice") Double bookprice);
 }

7.controller层

@RestController
public class BookController {
    @Autowired
    private BookMapperTest1 bookMapperTest1;

    @Autowired
    private BookMapperTest2 bookMapperTest2;

    @RequestMapping("insert001")
    public String insert001(String bookname,Double bookprice){
        bookMapperTest1.insertBook(bookname,bookprice);
        return "success";
    }

    @RequestMapping("insert002")
    public String insert002(String bookname,Double bookprice){
        bookMapperTest2.insertBook(bookname,bookprice);
        return "success";
    }
}

8.启动项目

test1数据库

test2数据库