springBoot整合相关
1：springBoot整合多数据源：
应用场景： 项目需要同时连接两个不同的数据库A, B，并且它们都为主从架构，一台写库，多台读库。
工具/版本：
jdk1.8、idea2018.1.4、springBoot2.0.1
注意：一定要统一版本，特别是springBoot不然或出问题。
创建项目：
我这里的项目与上一篇的springBoot整合mybatis、jsp是一样的就不重新建了。
下面我们看一下项目结构：
红框表示整合多数据源用到的模块：
下面我们开始整合：
1：首先：我们在application.properties配置文件中配置两个数据源：
application.properties ：
#test01 datasource
spring.datasource.hikari.test1.driver-class-name = com.mysql.jdbc.Driver
spring.datasource.hikari.test1.jdbc-url = jdbc:mysql://localhost:3306/test01?useUnicode=true&characterEncoding=utf-8
spring.datasource.hikari.test1.username = root
spring.datasource.hikari.test1.password = admin ####test02 datasource
spring.datasource.hikari.test2.driver-class-name = com.mysql.jdbc.Driver
spring.datasource.hikari.test2.jdbc-url = jdbc:mysql://localhost:3306/test02?useUnicode=true&characterEncoding=utf-8
spring.datasource.hikari.test2.username = root
spring.datasource.hikari.test2.password = admin
2： 然后新建dataSource包 ：参考上面的项目结构
新建类：Datasource1Config :
注：该数据源只针对下面的test1包下面的所有方法
package com.dengwei.springdemo.dataSource; import org.apache.ibatis.session.SqlSessionFactory;
import org.mybatis.spring.SqlSessionFactoryBean;
import org.mybatis.spring.SqlSessionTemplate;
import org.mybatis.spring.annotation.MapperScan;
import org.springframework.beans.factory.annotation.Qualifier;
import org.springframework.boot.context.properties.ConfigurationProperties;
import org.springframework.boot.jdbc.DataSourceBuilder;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import org.springframework.context.annotation.Primary;
import org.springframework.jdbc.datasource.DataSourceTransactionManager; import javax.sql.DataSource;
/*
* @Configuration :// 注册到springBoot容器中
* @MapperScan(basePackages = "com.dengwei.springdemo.test1", sqlSessionFactoryRef = "sqlSessionFactory1")
* 当前扫描包：com.dengwei.springdemo.test1下使用此数据源；sqlSessionFactoryRef：对应下面的sql回话工厂
* @Bean(name = "DataSource1") ：给当前注入的bean对象取的名字
* @ConfigurationProperties(prefix = "spring.datasource.hikari.test1") application.properteis中对应属性的前缀
* @Primary : 设置默认数据源，当多个数据源时，不加会报错
*/
@Configuration
@MapperScan(basePackages = "com.dengwei.springdemo.test1", sqlSessionFactoryRef = "sqlSessionFactory1")
public class DataSource1Config { /**
*
* @methodDesc: 功能描述:(配置test1数据库)
*/
@Bean(name = "DataSource1")
@ConfigurationProperties(prefix = "spring.datasource.hikari.test1")
@Primary
public DataSource testDataSource() {
return DataSourceBuilder.create().build();
} /**
*
* @methodDesc: 功能描述:(test1 sql会话工厂)
* @returnType:@param dataSource
* @returnType:@throws Exception SqlSessionFactory */
@Bean(name = "sqlSessionFactory1")
@Primary
public SqlSessionFactory testSqlSessionFactory(@Qualifier("DataSource1") DataSource dataSource)
throws Exception {
SqlSessionFactoryBean bean = new SqlSessionFactoryBean();
bean.setDataSource(dataSource);
//mybatis写配置文件（sql映射）需要加下面的代码
// bean.setMapperLocations(
// new PathMatchingResourcePatternResolver().getResources("classpath:mybatis/mapper/test1/*.xml"));
return bean.getObject();
} /**
*
* @methodDesc: 功能描述:(test1 事物管理)
*/
@Bean(name = "test1TransactionManager")
@Primary
public DataSourceTransactionManager testTransactionManager(@Qualifier("DataSource1") DataSource dataSource) {
return new DataSourceTransactionManager(dataSource);
} @Bean(name = "test1SqlSessionTemplate")
@Primary
public SqlSessionTemplate testSqlSessionTemplate(
@Qualifier("sqlSessionFactory1") SqlSessionFactory sqlSessionFactory) throws Exception {
return new SqlSessionTemplate(sqlSessionFactory);
} }
2:再建类 DataSource2Config : （基本上和DataSource1Config一样只是数据源名字不一样）
该数据源针对下面的test2包下面的方法：
package com.dengwei.springdemo.dataSource; import org.apache.ibatis.session.SqlSessionFactory;
import org.mybatis.spring.SqlSessionFactoryBean;
import org.mybatis.spring.SqlSessionTemplate;
import org.mybatis.spring.annotation.MapperScan;
import org.springframework.beans.factory.annotation.Qualifier;
import org.springframework.boot.context.properties.ConfigurationProperties;
import org.springframework.boot.jdbc.DataSourceBuilder;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import org.springframework.context.annotation.Primary;
import org.springframework.jdbc.datasource.DataSourceTransactionManager; import javax.sql.DataSource; /*
* @Configuration :// 注册到springBoot容器中
* @MapperScan(basePackages = "com.dengwei.springdemo.test2", sqlSessionFactoryRef = "SqlSessionFactory2")
* 当前扫描包：com.dengwei.springdemo.test2 下使用此数据源；sqlSessionFactoryRef：对应下面的sql回话工厂
* @Bean(name = "DataSource2") ：给当前注入的bean对象取的名字
* @ConfigurationProperties(prefix = "spring.datasource.hikari.test2") application.properteis中对应属性的前缀
*
*/
@Configuration
@MapperScan(basePackages = "com.dengwei.springdemo.test2", sqlSessionFactoryRef = "sqlSessionFactory2")
public class DataSource2Config { /**
*
* @methodDesc: 功能描述:(配置test２数据库)
*/
@Bean(name = "DataSource2")
@ConfigurationProperties(prefix = "spring.datasource.hikari.test2")
public DataSource testDataSource() {
return DataSourceBuilder.create().build();
} /**
*
* @methodDesc: 功能描述:(test２ sql会话工厂)
* @returnType:@param dataSource
* @returnType:@throws Exception SqlSessionFactory */
@Bean(name = "sqlSessionFactory2")
public SqlSessionFactory testSqlSessionFactory(@Qualifier("DataSource2") DataSource dataSource)
throws Exception {
SqlSessionFactoryBean bean = new SqlSessionFactoryBean();
bean.setDataSource(dataSource);
//mybatis写配置文件（sql映射）需要加下面的代码
// bean.setMapperLocations(
// new PathMatchingResourcePatternResolver().getResources("classpath:mybatis/mapper/test1/*.xml"));
return bean.getObject();
} /**
*
* @methodDesc: 功能描述:(test2 事物管理)
*/
@Bean(name = "test2TransactionManager")
public DataSourceTransactionManager testTransactionManager(@Qualifier("DataSource2") DataSource dataSource) {
return new DataSourceTransactionManager(dataSource);
} @Bean(name = "test2SqlSessionTemplate")
public SqlSessionTemplate testSqlSessionTemplate(
@Qualifier("sqlSessionFactory2") SqlSessionFactory sqlSessionFactory) throws Exception {
return new SqlSessionTemplate(sqlSessionFactory);
} }
3 ：建两个数据的映射 接口 test1、test2：
这里sql我用的是注解的方式：
test1 —– IUserMapper1:
package com.dengwei.springdemo.test1; import com.dengwei.springdemo.model.User;
import org.apache.ibatis.annotations.Insert;
import org.apache.ibatis.annotations.Param;
import org.apache.ibatis.annotations.Select; public interface IUserMapper1 { @Select("SELECT id,user_name userName, pass_word password FROM user WHERE id = #{id}")
User queryById(@Param("id") Integer id); @Insert("INSERT INTO `user` (user_name, password) VALUES (#{userName},#{password})")
void saveUser(@Param("userName") String userName, @Param("password") String password);
}
test2 —IUserMapper2 :
与 IuserMapper1 中的方法一样，只是操作不同的数据库
package com.dengwei.springdemo.test2; import com.dengwei.springdemo.model.User;
import org.apache.ibatis.annotations.Insert;
import org.apache.ibatis.annotations.Param;
import org.apache.ibatis.annotations.Select; public interface IUserMapper2 { @Select("SELECT id,user_name userName, pass_word password FROM user WHERE id = #{id}")
User queryById(@Param("id") Integer id); @Insert("INSERT INTO `user` (user_name, password) VALUES (#{userName},#{password})")
void saveUser(@Param("userName") String userName, @Param("password") String password);
}
4：建一个UserController2类 ：
测试两个包下面针对不同数据源的操作
package com.dengwei.springdemo.controller; import com.dengwei.springdemo.model.User;
import com.dengwei.springdemo.test1.IUserMapper1;
import com.dengwei.springdemo.test2.IUserMapper2;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.ResponseBody; @Controller
@RequestMapping("/user2")
public class UserController2 {
@Autowired
private IUserMapper1 userMapper1;
@Autowired
private IUserMapper2 userMapper2; @RequestMapping("/userMapper1")
@ResponseBody
public String testUserMapper1(String name,String password){
userMapper1.saveUser(name,password);
return "success";
}
@RequestMapping("/userMapper2")
@ResponseBody
public String testUserMapper2(String name,String password){
userMapper2.saveUser(name, password);
return "success";
}
}
下面我们看一下springBoot的启动类：
启动项目：
数据库新增数据成功：
