Spring boot Mybatis

最近刚接触Spring boot，正是因为他的及简配置方便开发，促使我下定决心要用它把之前写的项目重构，那么问题来了，spring boot怎么整合mybatis呢，下面几个配置类来搞定。

在我的代码当中是实现了数据库读写分离的，所以代码仅做参考，如有需要可以加我微信：benyzhous

【后续更新】

1、文件结构

DataBaseConfiguration.java用来获取数据库连接配置信息，配置从application.properties中读取

MybatisConfiguration.java也就是MyBatis配置核心入口，构建连接创建SqlSessionFactory

2、下面直接贴代码，有问题的话可以留言或者加我的微信公众号：cha-baba，或者个人微信号：benyzhous

application.yml 相关配置

# Server settings
server:
    port:8080
    address:localhost

# DATASOURCE
jdbc:
    driverClass: com.mysql.jdbc.Driver
    url: jdbc:mysql://127.0.0.1:3306/local-kaishustory?useUnicode=true&characterEncoding=utf-8
    username: root
    password: root

# SPRING PROFILES
spring:       
    # HTTP ENCODING
    http:
        encoding.charset: UTF-8
        encoding.enable: true
        encoding.force: true
        
# WeiXin Configuration
weixin:
    mp:
       appid: xx
       secret: ee
       token: weixin
       aeskey:

# MyBatis
mybatis:
    typeAliasesPackage: com.modou.**.domain
    mapperLocations: classpath:/com/modou/**/mapper/*.xml
    configLocation: classpath:/mybatis-config.xml

# LOGGING
logging:
    level:
       com.ibatis:DEBUG

DataBaseConfiguration.java

package com.modou.conf.mybatis;

import java.util.ArrayList;
import java.util.List;

import javax.sql.DataSource;

import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.boot.bind.RelaxedPropertyResolver;
import org.springframework.context.EnvironmentAware;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import org.springframework.context.annotation.Primary;
import org.springframework.core.env.Environment;
import org.springframework.transaction.annotation.EnableTransactionManagement;

import com.alibaba.druid.pool.DruidDataSource;

@Configuration
@EnableTransactionManagement
public class DataBaseConfiguration implements EnvironmentAware {

	private RelaxedPropertyResolver propertyResolver;

	private static Logger log = LoggerFactory.getLogger(DataBaseConfiguration.class);
	
	@Override
	public void setEnvironment(Environment env) {
		this.propertyResolver = new RelaxedPropertyResolver(env, "jdbc.");
	}

	@Bean(name="writeDataSource", destroyMethod = "close", initMethod="init")
	@Primary
	public DataSource writeDataSource() {
		log.debug("Configruing Write DataSource");
		
		DruidDataSource datasource = new DruidDataSource();
		datasource.setUrl(propertyResolver.getProperty("url"));
		datasource.setDriverClassName(propertyResolver.getProperty("driverClassName"));
		datasource.setUsername(propertyResolver.getProperty("username"));
		datasource.setPassword(propertyResolver.getProperty("password"));
		
		return datasource;
	}
	
	@Bean(name="readOneDataSource", destroyMethod = "close", initMethod="init")
	public DataSource readOneDataSource() {
		log.debug("Configruing Read One DataSource");
		
		DruidDataSource datasource = new DruidDataSource();
		datasource.setUrl(propertyResolver.getProperty("url"));
		datasource.setDriverClassName(propertyResolver.getProperty("driverClassName"));
		datasource.setUsername(propertyResolver.getProperty("username"));
		datasource.setPassword(propertyResolver.getProperty("password"));
		
		return datasource;
	}
	
	@Bean(name="readTowDataSource", destroyMethod = "close", initMethod="init")
	public DataSource readTowDataSource() {
		log.debug("Configruing Read Two DataSource");
		
		DruidDataSource datasource = new DruidDataSource();
		datasource.setUrl(propertyResolver.getProperty("url"));
		datasource.setDriverClassName(propertyResolver.getProperty("driverClassName"));
		datasource.setUsername(propertyResolver.getProperty("username"));
		datasource.setPassword(propertyResolver.getProperty("password"));
		
		return datasource;
	}
	
	
	@Bean(name="readDataSources")
	public List<DataSource> readDataSources(){
		List<DataSource> dataSources = new ArrayList<DataSource>();
		dataSources.add(readOneDataSource());
		dataSources.add(readTowDataSource());
		return dataSources;
	}
	
}

MyBatisConfiguration.java

package com.modou.conf.mybatis;

import java.util.List;

import javax.annotation.Resource;
import javax.persistence.EntityManager;
import javax.sql.DataSource;

import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
import org.apache.ibatis.session.SqlSessionFactory;
import org.mybatis.spring.SqlSessionFactoryBean;
import org.mybatis.spring.annotation.MapperScan;
import org.mybatis.spring.plugin.rw.RoundRobinRWRoutingDataSourceProxy;
import org.springframework.boot.autoconfigure.AutoConfigureAfter;
import org.springframework.boot.autoconfigure.condition.ConditionalOnClass;
import org.springframework.boot.autoconfigure.condition.ConditionalOnMissingBean;
import org.springframework.boot.bind.RelaxedPropertyResolver;
import org.springframework.context.EnvironmentAware;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import org.springframework.core.env.Environment;
import org.springframework.core.io.DefaultResourceLoader;
import org.springframework.core.io.support.PathMatchingResourcePatternResolver;
import org.springframework.jdbc.datasource.DataSourceTransactionManager;
import org.springframework.transaction.annotation.EnableTransactionManagement;

/**
 * 
 * 获取第二个数据库的连接信息，在application.yml中配置，并指定特定的前缀
 * 
 */
@Configuration
@ConditionalOnClass({ EnableTransactionManagement.class, EntityManager.class })
@AutoConfigureAfter({ DataBaseConfiguration.class })
@MapperScan(basePackages={"com.modou.**.mapper","com.github.abel533.entity.mapper"})
public class MybatisConfiguration implements EnvironmentAware{
	private static Log logger = LogFactory.getLog(MybatisConfiguration.class);

	private RelaxedPropertyResolver propertyResolver;
	
	@Resource(name="writeDataSource")
	private DataSource writeDataSource;
	
	@Resource(name="readDataSources")
	private List<Object> readDataSources;
	
	@Override
	public void setEnvironment(Environment environment) {
		this.propertyResolver = new RelaxedPropertyResolver(environment,"mybatis.");
	}
	
	@Bean
	@ConditionalOnMissingBean
	public SqlSessionFactory sqlSessionFactory() {
		try {
			SqlSessionFactoryBean sessionFactory = new SqlSessionFactoryBean();
			sessionFactory.setDataSource(roundRobinDataSouceProxy());
			sessionFactory.setTypeAliasesPackage(propertyResolver
					.getProperty("typeAliasesPackage"));
			sessionFactory
					.setMapperLocations(new PathMatchingResourcePatternResolver()
							.getResources(propertyResolver
									.getProperty("mapperLocations")));
			sessionFactory
					.setConfigLocation(new DefaultResourceLoader()
							.getResource(propertyResolver
									.getProperty("configLocation")));

			return sessionFactory.getObject();
		} catch (Exception e) {
			logger.warn("Could not confiure mybatis session factory");
			return null;
		}
	}
	
	
	@Bean
	public RoundRobinRWRoutingDataSourceProxy roundRobinDataSouceProxy(){
		RoundRobinRWRoutingDataSourceProxy proxy = new RoundRobinRWRoutingDataSourceProxy();
		proxy.setWriteDataSource(writeDataSource);
		proxy.setReadDataSoures(readDataSources);
		proxy.setReadKey("READ");
		proxy.setWriteKey("WRITE");
		
		return proxy;
	}
	
	@Bean
	@ConditionalOnMissingBean
	public DataSourceTransactionManager transactionManager() {
		return new DataSourceTransactionManager(writeDataSource);
	}
}

Application.java

package com.modou.weixin;

import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.boot.CommandLineRunner;
import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.EnableAutoConfiguration;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.ComponentScan;
import org.springframework.context.annotation.Configuration;

import com.modou.weixin.service.HelloWorldService;

/**
 * Created by chababa on 15/8/22.
 */
@Configuration
@ComponentScan(basePackages={"com.modou.conf","com.modou.weixin"})
@EnableAutoConfiguration
public class Application implements CommandLineRunner{
	@Autowired
	HelloWorldService helloWorldService;
	
	public static void main(String[] args) {
		SpringApplication.run(Application.class, args);
	}

	@Override
	public void run(String... args) throws Exception {
		System.out.println(this.helloWorldService.print());
	}
	
}

3、maven pom.xml 相关依赖[我是基于我的多模块依赖，这里只是一个示意]，其中配置了jrebel热部署插件，需要搭配jrebel6.2.1，具体配置和下载请转向 http://blog.csdn.net/xiaoyu411502/article/details/48047369

<?xml version="1.0"?>
<project
	xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd"
	xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance">
	<modelVersion>4.0.0</modelVersion>
	<parent>
		<groupId>com.modou.weixin</groupId>
		<artifactId>weixin-boot-parent</artifactId>
		<version>0.0.1-SNAPSHOT</version>
		<relativePath>../weixin-boot-parent</relativePath>
	</parent>
	<artifactId>weixin-boot-services</artifactId>
	<name>weixin-boot-services</name>
	<url>http://maven.apache.org</url>

	<properties>
		<project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
		<springloaded.version>1.2.4.RELEASE</springloaded.version>
	</properties>

	<dependencies>
		<dependency>
			<groupId>com.modou.weixin</groupId>
			<artifactId>weixin-boot-sdk</artifactId>
			<version>${project.version}</version>
		</dependency>
		<dependency>
			<groupId>com.modou.weixin</groupId>
			<artifactId>mybatis-plugin-rw</artifactId>
			<version>${project.version}</version>
		</dependency>
		<dependency>
			<groupId>org.springframework.boot</groupId>
			<artifactId>spring-boot-starter-web</artifactId>
		</dependency>
		<dependency>
			<groupId>org.springframework.boot</groupId>
			<artifactId>spring-boot-starter-actuator</artifactId>
		</dependency>
		<dependency>
			<groupId>org.springframework.boot</groupId>
			<artifactId>spring-boot-starter-thymeleaf</artifactId>
		</dependency>
		<dependency>
			<groupId>org.springframework</groupId>
			<artifactId>spring-jdbc</artifactId>
		</dependency>
		<dependency>
			<groupId>javax.persistence</groupId>
			<artifactId>persistence-api</artifactId>
		</dependency>
		<dependency>
			<groupId>org.mybatis</groupId>
			<artifactId>mybatis</artifactId>
		</dependency>
		<dependency>
			<groupId>org.mybatis</groupId>
			<artifactId>mybatis-spring</artifactId>
		</dependency>
		<dependency>
			<groupId>com.alibaba</groupId>
			<artifactId>druid</artifactId>
		</dependency>
		<dependency>
			<groupId>mysql</groupId>
			<artifactId>mysql-connector-java</artifactId>
		</dependency>
		<dependency>
			<groupId>com.github.pagehelper</groupId>
			<artifactId>pagehelper</artifactId>
		</dependency>
		<dependency>
			<groupId>tk.mybatis</groupId>
			<artifactId>mapper</artifactId>
		</dependency>
		<dependency>
			<groupId>org.mybatis.generator</groupId>
			<artifactId>mybatis-generator-core</artifactId>
		</dependency>
	</dependencies>

</project>