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 settingsserver:    port:8080    address:localhost# DATASOURCEjdbc:    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 PROFILESspring:           # HTTP ENCODING    http:        encoding.charset: UTF-8        encoding.enable: true        encoding.force: true        # WeiXin Configurationweixin:    mp:       appid: xx       secret: ee       token: weixin       aeskey:# MyBatismybatis:    typeAliasesPackage: com.modou.**.domain    mapperLocations: classpath:/com/modou/**/mapper/*.xml    configLocation: classpath:/mybatis-config.xml# LOGGINGlogging:    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@EnableTransactionManagementpublic class DataBaseConfiguration implements EnvironmentAware {private RelaxedPropertyResolver propertyResolver;private static Logger log = LoggerFactory.getLogger(DataBaseConfiguration.class);@Overridepublic void setEnvironment(Environment env) {this.propertyResolver = new RelaxedPropertyResolver(env, "jdbc.");}@Bean(name="writeDataSource", destroyMethod = "close", initMethod="init")@Primarypublic 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;@Overridepublic void setEnvironment(Environment environment) {this.propertyResolver = new RelaxedPropertyResolver(environment,"mybatis.");}@Bean@ConditionalOnMissingBeanpublic 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;}}@Beanpublic RoundRobinRWRoutingDataSourceProxy roundRobinDataSouceProxy(){RoundRobinRWRoutingDataSourceProxy proxy = new RoundRobinRWRoutingDataSourceProxy();proxy.setWriteDataSource(writeDataSource);proxy.setReadDataSoures(readDataSources);proxy.setReadKey("READ");proxy.setWriteKey("WRITE");return proxy;}@Bean@ConditionalOnMissingBeanpublic 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"})@EnableAutoConfigurationpublic class Application implements CommandLineRunner{@AutowiredHelloWorldService helloWorldService;public static void main(String[] args) {SpringApplication.run(Application.class, args);}@Overridepublic 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"?><projectxsi: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>