看到網上好多例項，都失敗了，報掃描不到mapper檔案，下面是我的完整例項

1. pom檔案的驅動jar包加上去，不說了

2. application.yml 

spring:
datasource:
        master:
          jdbc-url: jdbc:mysql://10.12.49.55:3306/smartcity-01
          username: root
          password: root
          # 使用druid資料來源
          type: com.alibaba.druid.pool.DruidDataSource
          driverClassName: com.mysql.jdbc.Driver
        other:
          jdbc-url: jdbc:sqlserver://10.12.49.35:1433;DatabaseName=LandscapingDB
          username: sa
          password: Sql123
          #使用druid資料來源
          type: com.alibaba.druid.pool.DruidDataSource
          driverClassName: com.microsoft.sqlserver.jdbc.SQLServerDriver
 

注意不要使用url，要使用jdbc-url

主資料庫配置：

package com.pactera.scm.config;

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.core.io.support.PathMatchingResourcePatternResolver;
import org.springframework.jdbc.datasource.DataSourceTransactionManager;
import javax.sql.DataSource;

@Configuration
@MapperScan(basePackages ="com.pactera.scm.mapper", sqlSessionFactoryRef = "masterSqlSessionFactory")
public class MybatisDbMasterConfig {

    @Primary
    @Bean(name = "masterDataSource")
    @ConfigurationProperties(prefix = "spring.datasource.master")
    public DataSource dataSource() {
        return DataSourceBuilder.create().build();
    }

    @Primary
    @Bean(name = "masterSqlSessionFactory")
    public SqlSessionFactory sqlSessionFactory(@Qualifier("masterDataSource") DataSource dataSource) throws Exception {
        SqlSessionFactoryBean factoryBean = new SqlSessionFactoryBean();
        factoryBean.setDataSource(dataSource);
        factoryBean.setTypeAliasesPackage("com.pactera.scm.entity");
        factoryBean.setMapperLocations(
                new PathMatchingResourcePatternResolver().getResources("classpath:mapper/*.xml"));
        return factoryBean.getObject();
    }

    @Primary
    @Bean(name = "masterTransactionManager")
    public DataSourceTransactionManager transactionManager(@Qualifier("masterDataSource") DataSource dataSource) {
        return new DataSourceTransactionManager(dataSource);
    }

    @Bean(name = "masterSqlSessionTemplate")
    @Primary
    public SqlSessionTemplate testSqlSessionTemplate(
            @Qualifier("masterSqlSessionFactory") SqlSessionFactory sqlSessionFactory) throws Exception {
        return new SqlSessionTemplate(sqlSessionFactory);
    }
}
 

第二資料庫配置：

package com.pactera.scm.config;

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.core.io.support.PathMatchingResourcePatternResolver;
import org.springframework.jdbc.datasource.DataSourceTransactionManager;
import javax.sql.DataSource;

@Configuration
@MapperScan(basePackages = "com.pactera.scm.otherDB", sqlSessionFactoryRef = "otherSqlSessionFactory")
public class MybatisDbOtherConfig {

    @Bean(name = "otherDataSource")
    @ConfigurationProperties(prefix = "spring.datasource.other")
    public DataSource dataSource() {
        return DataSourceBuilder.create().build();
    }

    @Bean(name = "otherTransactionManager")
    public DataSourceTransactionManager transactionManager(@Qualifier("otherDataSource") DataSource dataSource) {
        return new DataSourceTransactionManager(dataSource);

    }

    @Bean(name = "otherSqlSessionFactory")
    public SqlSessionFactory basicSqlSessionFactory(@Qualifier("otherDataSource") DataSource basicDataSource) throws Exception {
        SqlSessionFactoryBean factoryBean = new SqlSessionFactoryBean();
        factoryBean.setDataSource(basicDataSource);
        factoryBean.setMapperLocations(
                new PathMatchingResourcePatternResolver().getResources("classpath:other/*.xml"));
        return factoryBean.getObject();
    }

    @Bean(name = "otherSqlSessionTemplate")
    public SqlSessionTemplate testSqlSessionTemplate(
            @Qualifier("otherSqlSessionFactory") SqlSessionFactory sqlSessionFactory) throws Exception {
        return new SqlSessionTemplate(sqlSessionFactory);
    }
}
 

啟動類正常些就行了，不需要改動，保證能掃描到配置檔案就行

@SpringBootApplication
@EnableConfigurationProperties
@EnableSchedulingpublic class ScmApplication {

    public static void main(String[] args) {
        SpringApplication.run(ScmApplication.class, args);
    }
}

使用：

@Resource
private AccountMapper accountMapper;