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>