spring boot 中配置 多数据源，使用mybatis和druid

其他 2018-10-24 10:43:09 阅读次数: 0
版权声明：本文为博主原创文章，未经博主允许不得转载。 https://blog.csdn.net/qq_25484147/article/details/82862298

1. 介绍

    介绍如何在spring boot项目中使用整合mybatis，druid，多数据源和在多数据源的情况下使用事务。

2. 引入pom 文件

<?xml version="1.0" encoding="UTF-8"?>
<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
         xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
    <modelVersion>4.0.0</modelVersion>

    <groupId>com.bobo.shopping</groupId>
    <artifactId>manage</artifactId>
    <version>0.0.1-SNAPSHOT</version>
    <packaging>jar</packaging>

    <name>manage</name>
    <description>商城项目的后台管理系统</description>

    <parent>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-parent</artifactId>
        <version>2.0.5.RELEASE</version>
        <relativePath/> <!-- lookup parent from repository -->
    </parent>

    <properties>
        <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
        <project.reporting.outputEncoding>UTF-8</project.reporting.outputEncoding>
        <java.version>1.8</java.version>
    </properties>

    <dependencies>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-aop</artifactId>
        </dependency>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-data-redis</artifactId>
        </dependency>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-jdbc</artifactId>
        </dependency>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-thymeleaf</artifactId>
        </dependency>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-web</artifactId>
        </dependency>
        <dependency>
            <groupId>org.mybatis.spring.boot</groupId>
            <artifactId>mybatis-spring-boot-starter</artifactId>
            <version>1.3.2</version>
        </dependency>

        <dependency>
            <groupId>mysql</groupId>
            <artifactId>mysql-connector-java</artifactId>
            <scope>runtime</scope>
        </dependency>
        <dependency>
            <groupId>org.projectlombok</groupId>
            <artifactId>lombok</artifactId>
            <optional>true</optional>
        </dependency>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-test</artifactId>
            <scope>test</scope>
        </dependency>

        <!-- alibaba的druid数据库连接池 -->
        <dependency>
            <groupId>com.alibaba</groupId>
            <artifactId>druid-spring-boot-starter</artifactId>
            <version>1.1.0</version>
        </dependency>
        <dependency>
            <groupId>com.fasterxml.jackson.core</groupId>
            <artifactId>jackson-core</artifactId>
        </dependency>
        <dependency>
            <groupId>com.fasterxml.jackson.core</groupId>
            <artifactId>jackson-databind</artifactId>
        </dependency>
        <dependency>
            <groupId>com.fasterxml.jackson.datatype</groupId>
            <artifactId>jackson-datatype-joda</artifactId>
        </dependency>
        <dependency>
            <groupId>com.fasterxml.jackson.module</groupId>
            <artifactId>jackson-module-parameter-names</artifactId>
        </dependency>
        <!--FastJson-->
        <dependency>
            <groupId>com.alibaba</groupId>
            <artifactId>fastjson</artifactId>
            <version>1.2.15</version>
        </dependency>
        <!--lang3包-->
        <!-- https://mvnrepository.com/artifact/org.apache.commons/commons-lang3 -->
        <dependency>
            <groupId>org.apache.commons</groupId>
            <artifactId>commons-lang3</artifactId>
            <version>3.0</version>
        </dependency>
        <!--日志处理-->
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-logging</artifactId>
        </dependency>
    </dependencies>

    <build>
        <plugins>
            <plugin>
                <groupId>org.springframework.boot</groupId>
                <artifactId>spring-boot-maven-plugin</artifactId>
            </plugin>
        </plugins>
        <resources>
            <resource>
                <directory>src/main/resources</directory>
            </resource>
            <resource>
                <directory>src/main/java</directory>
                <includes>
                    <include>**/*.xml</include>
                </includes>
                <filtering>true</filtering>
            </resource>
        </resources>
    </build>
</project>

3.引入数据源

#---------------------------------------------------------
#Shopping数据源
spring.datasource.shopping.url=jdbc:mysql://localhost:3306/shopping?characterEncoding=UTF-8
spring.datasource.shopping.username=root
spring.datasource.shopping.password=123456
spring.datasource.shopping.driver-class-name=com.mysql.jdbc.Driver
spring.datasource.shopping.maxActive=20
spring.datasource.shopping.initialSize=5
spring.datasource.shopping.minIdle=5
spring.datasource.shopping.maxWait=6000
spring.datasource.shopping.maxPoolPreparedStatementPerConnectionSize=20
spring.datasource.shopping.timeBetweenEvictionRunsMillis=60000
spring.datasource.shopping.minEvictableIdleTimeMillis=300000
spring.datasource.shopping.poolPreparedStatements=true
#---------------------------------------------------------
#shopping_cms数据源
spring.datasource.shoppingcms.url=jdbc:mysql://localhost:3306/shopping_cms?characterEncoding=UTF-8
spring.datasource.shoppingcms.username=root
spring.datasource.shoppingcms.password=123456
spring.datasource.shoppingcms.driver-class-name=com.mysql.jdbc.Driver
spring.datasource.shoppingcms.maxActive=20
spring.datasource.shoppingcms.initialSize=5
spring.datasource.shoppingcms.minIdle=5
spring.datasource.shoppingcms.maxWait=6000
spring.datasource.shoppingcms.maxPoolPreparedStatementPerConnectionSize=20
spring.datasource.shoppingcms.timeBetweenEvictionRunsMillis=60000
spring.datasource.shoppingcms.minEvictableIdleTimeMillis=300000
spring.datasource.shoppingcms.poolPreparedStatements=true

4.映射多数据源

package com.bobo.shopping.manage.config.entity.datasource;

import org.springframework.boot.context.properties.ConfigurationProperties;
import org.springframework.stereotype.Component;

/**
 * 配置文件中关于shopping数据库配置
 *
 * @author [email protected]
 * @create 2018-09-23 17:15
 **/
@ConfigurationProperties(prefix = "spring.datasource.shoppingcms")
@Component
public class ShoppingCMSDataSourceProperties {
    public String url;

    public String username;

    public String password;

    public String driverClassName;

    public Integer maxActive;

    public Integer initialSize;

    public Integer minIdle;

    public Integer maxWait;

    public Integer maxPoolPreparedStatementPerConnectionSize;

    public Integer timeBetweenEvictionRunsMillis;

    public Integer minEvictableIdleTimeMillis;

    public Boolean poolPreparedStatements;

    public String getUrl() {
        return url;
    }

    public void setUrl(String url) {
        this.url = url;
    }

    public String getUsername() {
        return username;
    }

    public void setUsername(String username) {
        this.username = username;
    }

    public String getPassword() {
        return password;
    }

    public void setPassword(String password) {
        this.password = password;
    }

    public String getDriverClassName() {
        return driverClassName;
    }

    public void setDriverClassName(String driverClassName) {
        this.driverClassName = driverClassName;
    }

    public Integer getMaxActive() {
        return maxActive;
    }

    public void setMaxActive(Integer maxActive) {
        this.maxActive = maxActive;
    }

    public Integer getInitialSize() {
        return initialSize;
    }

    public void setInitialSize(Integer initialSize) {
        this.initialSize = initialSize;
    }

    public Integer getMinIdle() {
        return minIdle;
    }

    public void setMinIdle(Integer minIdle) {
        this.minIdle = minIdle;
    }

    public Integer getMaxWait() {
        return maxWait;
    }

    public void setMaxWait(Integer maxWait) {
        this.maxWait = maxWait;
    }

    public Integer getMaxPoolPreparedStatementPerConnectionSize() {
        return maxPoolPreparedStatementPerConnectionSize;
    }

    public void setMaxPoolPreparedStatementPerConnectionSize(Integer maxPoolPreparedStatementPerConnectionSize) {
        this.maxPoolPreparedStatementPerConnectionSize = maxPoolPreparedStatementPerConnectionSize;
    }

    public Integer getTimeBetweenEvictionRunsMillis() {
        return timeBetweenEvictionRunsMillis;
    }

    public void setTimeBetweenEvictionRunsMillis(Integer timeBetweenEvictionRunsMillis) {
        this.timeBetweenEvictionRunsMillis = timeBetweenEvictionRunsMillis;
    }

    public Integer getMinEvictableIdleTimeMillis() {
        return minEvictableIdleTimeMillis;
    }

    public void setMinEvictableIdleTimeMillis(Integer minEvictableIdleTimeMillis) {
        this.minEvictableIdleTimeMillis = minEvictableIdleTimeMillis;
    }

    public Boolean getPoolPreparedStatements() {
        return poolPreparedStatements;
    }

    public void setPoolPreparedStatements(Boolean poolPreparedStatements) {
        this.poolPreparedStatements = poolPreparedStatements;
    }
}

package com.bobo.shopping.manage.config.entity.datasource;

import org.springframework.boot.context.properties.ConfigurationProperties;
import org.springframework.stereotype.Component;

/**
 * 配置文件中关于shopping数据库配置
 *
 * @author [email protected]
 * @create 2018-09-23 17:15
 **/
@ConfigurationProperties(prefix = "spring.datasource.shopping")
@Component
public class ShoppingDataSourceProperties {
    public String url;

    public String username;

    public String password;

    public String driverClassName;

    public Integer maxActive;

    public Integer initialSize;

    public Integer minIdle;

    public Integer maxWait;

    public Integer maxPoolPreparedStatementPerConnectionSize;

    public Integer timeBetweenEvictionRunsMillis;

    public Integer minEvictableIdleTimeMillis;

    public Boolean poolPreparedStatements;

    public String getUrl() {
        return url;
    }

    public void setUrl(String url) {
        this.url = url;
    }

    public String getUsername() {
        return username;
    }

    public void setUsername(String username) {
        this.username = username;
    }

    public String getPassword() {
        return password;
    }

    public void setPassword(String password) {
        this.password = password;
    }

    public String getDriverClassName() {
        return driverClassName;
    }

    public void setDriverClassName(String driverClassName) {
        this.driverClassName = driverClassName;
    }

    public Integer getMaxActive() {
        return maxActive;
    }

    public void setMaxActive(Integer maxActive) {
        this.maxActive = maxActive;
    }

    public Integer getInitialSize() {
        return initialSize;
    }

    public void setInitialSize(Integer initialSize) {
        this.initialSize = initialSize;
    }

    public Integer getMinIdle() {
        return minIdle;
    }

    public void setMinIdle(Integer minIdle) {
        this.minIdle = minIdle;
    }

    public Integer getMaxWait() {
        return maxWait;
    }

    public void setMaxWait(Integer maxWait) {
        this.maxWait = maxWait;
    }

    public Integer getMaxPoolPreparedStatementPerConnectionSize() {
        return maxPoolPreparedStatementPerConnectionSize;
    }

    public void setMaxPoolPreparedStatementPerConnectionSize(Integer maxPoolPreparedStatementPerConnectionSize) {
        this.maxPoolPreparedStatementPerConnectionSize = maxPoolPreparedStatementPerConnectionSize;
    }

    public Integer getTimeBetweenEvictionRunsMillis() {
        return timeBetweenEvictionRunsMillis;
    }

    public void setTimeBetweenEvictionRunsMillis(Integer timeBetweenEvictionRunsMillis) {
        this.timeBetweenEvictionRunsMillis = timeBetweenEvictionRunsMillis;
    }

    public Integer getMinEvictableIdleTimeMillis() {
        return minEvictableIdleTimeMillis;
    }

    public void setMinEvictableIdleTimeMillis(Integer minEvictableIdleTimeMillis) {
        this.minEvictableIdleTimeMillis = minEvictableIdleTimeMillis;
    }

    public Boolean getPoolPreparedStatements() {
        return poolPreparedStatements;
    }

    public void setPoolPreparedStatements(Boolean poolPreparedStatements) {
        this.poolPreparedStatements = poolPreparedStatements;
    }
}

5. 配置数据源

package com.bobo.shopping.manage.config.datasource;

import com.alibaba.druid.pool.DruidDataSource;
import com.bobo.shopping.manage.config.entity.datasource.ShoppingCMSDataSourceProperties;
import org.apache.ibatis.session.SqlSessionFactory;
import org.mybatis.spring.SqlSessionFactoryBean;
import org.mybatis.spring.annotation.MapperScan;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.beans.factory.annotation.Qualifier;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import org.springframework.core.io.support.PathMatchingResourcePatternResolver;
import org.springframework.jdbc.datasource.DataSourceTransactionManager;

import javax.sql.DataSource;

/**
 * cms数据库
 *
 * @author [email protected]
 * @create 2018-09-23 17:20
 **/
@Configuration
@MapperScan(basePackages = CMSConfig.PACKAGE, sqlSessionFactoryRef = "cmsSqlSessionFactory")
public class CMSConfig {

    static final String PACKAGE = "com.bobo.shopping.manage.dao.cms.mapper";
    static final String MAPPER_LOCATION = "classpath:mapper/cms/*.xml";

    @Bean(name = "cmsDataSource")
    public DataSource configurationDataSource() {
        DruidDataSource dataSource = new DruidDataSource();
        //设置数据源的属性
        setDruidProperties(dataSource);
        return dataSource;
    }

    /**
     * 注入数据源配置信息
     */
    @Autowired
    ShoppingCMSDataSourceProperties cmsConfig;

    /**
     * 设置数据源的属性的方法
     * @param dataSource
     */
    private void setDruidProperties(DruidDataSource dataSource) {
        dataSource.setUrl(cmsConfig.url);
        dataSource.setUsername(cmsConfig.username);
        dataSource.setPassword(cmsConfig.password);
        dataSource.setDriverClassName(cmsConfig.driverClassName);
        dataSource.setMaxActive(cmsConfig.maxActive);
        dataSource.setInitialSize(cmsConfig.initialSize);
        dataSource.setMinIdle(cmsConfig.minIdle);
        dataSource.setMaxWait(cmsConfig.maxWait);
        dataSource.setMaxPoolPreparedStatementPerConnectionSize(cmsConfig.maxPoolPreparedStatementPerConnectionSize);
        dataSource.setTimeBetweenEvictionRunsMillis(cmsConfig.timeBetweenEvictionRunsMillis);
        dataSource.setMinEvictableIdleTimeMillis(cmsConfig.minEvictableIdleTimeMillis);
        dataSource.setPoolPreparedStatements(cmsConfig.poolPreparedStatements);
    }

    @Bean(name = "cmsTransactionManager")
    public DataSourceTransactionManager clusterTransactionManager() {
        return new DataSourceTransactionManager(configurationDataSource());
    }

    @Bean(name = "cmsSqlSessionFactory")
    public SqlSessionFactory clusterSqlSessionFactory(@Qualifier("cmsDataSource") DataSource clusterDataSource)
            throws Exception {
        SqlSessionFactoryBean sessionFactory = new SqlSessionFactoryBean();
        sessionFactory.setDataSource(clusterDataSource);
        sessionFactory.setMapperLocations(new PathMatchingResourcePatternResolver().getResources(CMSConfig.MAPPER_LOCATION));
        return sessionFactory.getObject();
    }

}


package com.bobo.shopping.manage.config.datasource;

import com.alibaba.druid.pool.DruidDataSource;
import com.bobo.shopping.manage.config.entity.datasource.ShoppingDataSourceProperties;
import org.apache.ibatis.session.SqlSessionFactory;
import org.mybatis.spring.SqlSessionFactoryBean;
import org.mybatis.spring.annotation.MapperScan;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.beans.factory.annotation.Qualifier;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import org.springframework.context.annotation.Primary;
import org.springframework.core.io.support.PathMatchingResourcePatternResolver;
import org.springframework.jdbc.datasource.DataSourceTransactionManager;

import javax.sql.DataSource;

/**
 * shopping数据库
 *
 * @author [email protected]
 * @create 2018-09-23 17:20
 **/
@Configuration
@MapperScan(basePackages = ShoppingConfig.PACKAGE, sqlSessionFactoryRef = "shoppingSqlSessionFactory")
public class ShoppingConfig {

    static final String PACKAGE = "com.bobo.shopping.manage.dao.shopping.mapper";
    static final String MAPPER_LOCATION = "classpath:mapper/shopping/*.xml";

    @Bean(name = "shoppingDataSource")
    public DataSource configurationDataSource() {
        DruidDataSource dataSource = new DruidDataSource();
        //设置数据源的属性
        setDruidProperties(dataSource);
        return dataSource;
    }

    /**
     * 注入数据源配置信息
     */
    @Autowired
    ShoppingDataSourceProperties config;

    /**
     * 设置数据源的属性的方法
     * @param dataSource
     */
    private void setDruidProperties(DruidDataSource dataSource) {
        dataSource.setUrl(config.url);
        dataSource.setUsername(config.username);
        dataSource.setPassword(config.password);
        dataSource.setDriverClassName(config.driverClassName);
        dataSource.setMaxActive(config.maxActive);
        dataSource.setInitialSize(config.initialSize);
        dataSource.setMinIdle(config.minIdle);
        dataSource.setMaxWait(config.maxWait);
        dataSource.setMaxPoolPreparedStatementPerConnectionSize(config.maxPoolPreparedStatementPerConnectionSize);
        dataSource.setTimeBetweenEvictionRunsMillis(config.timeBetweenEvictionRunsMillis);
        dataSource.setMinEvictableIdleTimeMillis(config.minEvictableIdleTimeMillis);
        dataSource.setPoolPreparedStatements(config.poolPreparedStatements);
    }

    @Bean(name = "shoppingTransactionManager")
    @Primary
    public DataSourceTransactionManager clusterTransactionManager() {
        DataSourceTransactionManager dataSourceTransactionManager =
                new DataSourceTransactionManager(configurationDataSource());
        return dataSourceTransactionManager;
    }

    @Bean(name = "shoppingSqlSessionFactory")
    @Primary
    public SqlSessionFactory clusterSqlSessionFactory(@Qualifier("shoppingDataSource") DataSource clusterDataSource)
            throws Exception {
        SqlSessionFactoryBean sessionFactory = new SqlSessionFactoryBean();
        sessionFactory.setDataSource(clusterDataSource);
        sessionFactory.setMapperLocations(new PathMatchingResourcePatternResolver().getResources(ShoppingConfig.MAPPER_LOCATION));
        return sessionFactory.getObject();
    }
}

6. 在service中使用事务

@Service
@Slf4j
@Transactional(transactionManager = "shoppingTransactionManager",rollbackFor = Exception.class)
public class TestService extends BaseService {}

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