SpringBoot进阶教程 | 第四篇：整合Mybatis实现多数据源

这篇文章主要介绍，通过Spring Boot整合Mybatis后如何实现在一个工程中实现多数据源。同时可实现读写分离。

环境：

windows
jdk 8
maven 3.0
IDEA

在mysql中创建student库并执行下面查询创建student表

-- ----------------------------
-- Table structure for student
-- ----------------------------
DROP TABLE IF EXISTS `student`;
CREATE TABLE `student` (
  `sno` int(15) NOT NULL,
  `sname` varchar(50) DEFAULT NULL,
  `sex` char(2) DEFAULT NULL,
  `dept` varchar(25) DEFAULT NULL,
  `birth` date DEFAULT NULL,
  `age` int(3) DEFAULT NULL,
  PRIMARY KEY (`sno`)
) ENGINE=InnoDB DEFAULT CHARSET=utf8;

-- ----------------------------
-- Records of student
-- ----------------------------
INSERT INTO `student` VALUES ("1", "李同学", "1", "王同学学习成绩很不错", "2010-07-22", "17");

在mysql中创建teacher库并执行下面查询创建teacher表

-- ----------------------------
-- Table structure for teacher
-- ----------------------------
DROP TABLE IF EXISTS `teacher`;
CREATE TABLE `teacher` (
  `Tno` varchar(20) NOT NULL DEFAULT "",
  `Tname` varchar(50) DEFAULT NULL,
  `sex` char(2) DEFAULT NULL,
  `dept` varchar(25) DEFAULT NULL,
  `birth` date DEFAULT NULL,
  `age` int(3) DEFAULT NULL,
  PRIMARY KEY (`Tno`)
) ENGINE=InnoDB DEFAULT CHARSET=utf8;

-- ----------------------------
-- Records of teacher
-- ----------------------------
INSERT INTO `teacher` VALUES ("1", "王老师", "1", "王老师上课很认真", "2018-07-06", "35");

    4.0.0

    
        cn.zhangbox
        spring-boot-study
        1.0-SNAPSHOT
    

    cn.zhangbox
    spring-boot-mybatis-datasource
    0.0.1-SNAPSHOT
    jar

    spring-boot-mybatis-datasource
    this project for Spring Boot



    
        UTF-8
        UTF-8
        1.8
        
        3.4
        1.10
        1.2.0
        1.16.14
        1.2.41
        1.1.2
    

    
        
        
            aliyunmaven
            http://maven.aliyun.com/nexus/content/groups/public/
        
    

    

        
        
            org.mybatis.spring.boot
            mybatis-spring-boot-starter
            ${mybatis-spring-boot.version}
        
        

        
        
            org.springframework.boot
            spring-boot-starter-web
        
        

        
        
            mysql
            mysql-connector-java
            runtime
        
        

        
        
            org.springframework.boot
            spring-boot-starter-test
            test
        
        

        
        
            org.apache.commons
            commons-lang3
            ${commons-lang3.version}
        
        
            commons-codec
            commons-codec
            ${commons-codec.version}
        
        

        
        
            com.alibaba
            fastjson
            ${fastjson.version}
        
        

        
        
            com.alibaba
            druid-spring-boot-starter
            ${druid.version}
        
        

        
        
            org.projectlombok
            lombok
            ${lombok.version}
        
        
    

    
        spring-boot-mybatis-datasource
        
        
            org.apache.maven.plugins
            maven-compiler-plugin
            3.5.1
            
                1.8
                1.8
                UTF-8
            
        
        
            org.apache.maven.plugins
            maven-surefire-plugin
            2.19.1
        

        
            org.springframework.boot
            spring-boot-maven-plugin
            
                
                    org.springframework
                    springloaded
                    1.2.4.RELEASE
                
            
            
                cn.zhangbox.admin.SpringBootDruidApplication
                -Dfile.encoding=UTF-8 -Xdebug
                    -Xrunjdwp:transport=dt_socket,server=y,suspend=n,address=5005
                
                true
                true
            
        
            
                org.springframework.boot
                spring-boot-maven-plugin
                
                    cn.zhangbox.admin.SpringBootDruidApplication
                    -Dfile.encoding=UTF-8 -Xdebug -Xrunjdwp:transport=dt_socket,server=y,suspend=n,address=5005
                    true
                    true
                
            
        
    

注意：这里引入了lombok插件节省编写实体类时候写get和set方法,这里在idea中进行set和get操作需要下载lombok插件,在设置页面的plugins中搜索lombok插件在中央插件库下载后重启idea即可,更详细的lombok使用教程可以查考:

Lombok：让JAVA代码更优雅

#公共配置
server:
    port: 80
    tomcat:
      uri-encoding: UTF-8
spring:
  #激活哪一个环境的配置文件
  profiles:
    active: dev
  #连接池配置
  datasource:
    #配置student库驱动和连接池
    student:
      driver-class-name: com.mysql.jdbc.Driver
      # 使用druid数据源
      type: com.alibaba.druid.pool.DruidDataSource
    #配置teacher库驱动和连接池
    teacher:
      driver-class-name: com.mysql.jdbc.Driver
      # 使用druid数据源
      type: com.alibaba.druid.pool.DruidDataSource
    druid:
      # 配置测试查询语句
      validationQuery: SELECT 1 FROM DUAL
      # 初始化大小，最小，最大
      initialSize: 10
      minIdle: 10
      maxActive: 200
      # 配置一个连接在池中最小生存的时间，单位是毫秒
      minEvictableIdleTimeMillis: 180000
      testOnBorrow: false
      testWhileIdle: true
      removeAbandoned: true
      removeAbandonedTimeout: 1800
      logAbandoned: true
      # 打开PSCache，并且指定每个连接上PSCache的大小
      poolPreparedStatements: true
      maxOpenPreparedStatements: 100
      # 配置监控统计拦截的filters，去掉后监控界面sql无法统计，"wall"用于防火墙
      filters: stat,wall,log4j
      # 通过connectProperties属性来打开mergeSql功能；慢SQL记录
      connectionProperties: druid.stat.mergeSql=true;druid.stat.slowSqlMillis=5000

#mybatis
mybatis:
  # 实体类扫描
  type-aliases-package: cn.zhangbox.springboot.entity
  # 配置映射文件位置
  mapper-locations: classpath:mapper/*.xml
  # 开启驼峰匹配
  mapUnderscoreToCamelCase: true

---
#开发环境配置
server:
  #端口
  port: 8080
spring:
  profiles: dev
  # 数据源配置
  datasource:
    student:
      url: jdbc:mysql://127.0.0.1:3306/student?useUnicode=true&characterEncoding=utf8&useSSL=false&tinyInt1isBit=true
      username: root
      password: 123456
    teacher:
      url: jdbc:mysql://127.0.0.1:3306/teacher?useUnicode=true&characterEncoding=utf8&useSSL=false&tinyInt1isBit=true
      username: root
      password: 123456
#日志
logging:
  config: classpath:log/logback.xml
  path: log/spring-boot-mybatis-datasource

---
#测试环境配置
server:
  #端口
  port: 80
spring:
  profiles: test
  # 数据源配置
  datasource:
    student:
      url: jdbc:mysql://127.0.0.1:3306/student?useUnicode=true&characterEncoding=utf8&useSSL=false&tinyInt1isBit=true
      username: root
      password: 123456
    teacher:
      url: jdbc:mysql://127.0.0.1:3306/teacher?useUnicode=true&characterEncoding=utf8&useSSL=false&tinyInt1isBit=true
      username: root
      password: 123456
#日志
logging:
  config: classpath:log/logback.xml
  path: /home/log/spring-boot-mybatis-datasource

---
#生产环境配置
server:
  #端口
  port: 8080
spring:
  profiles: prod
  # 数据源配置
  datasource:
    student:
      url: jdbc:mysql://127.0.0.1:3306/student?useUnicode=true&characterEncoding=utf8&useSSL=false&tinyInt1isBit=true
      username: root
      password: 123456
    teacher:
      url: jdbc:mysql://127.0.0.1:3306/teacher?useUnicode=true&characterEncoding=utf8&useSSL=false&tinyInt1isBit=true
      username: root
      password: 123456
#日志
logging:
  config: classpath:log/logback.xml
  path: /home/log/spring-boot-mybatis-datasource

这里进行了mybatis整合,如果不会mybatis整合可以参考我写的这篇文章:
SpringBoot非官方教程 | 第六篇：SpringBoot整合mybatis

在工程resources文件夹下新建文件夹log，并在该文件夹下创建logback.xml文件,加入以下配置：

    
    

    
    

    
    
    
    
    
    
    

    
    
        
            ${CONSOLE_LOG_PATTERN}
            UTF-8 
        
        
        
            info
        
    


    
    
        
        ${LOG_PATH}/log_debug.log
        
        
            %d{yyyy-MM-dd HH:mm:ss.SSS} [%thread] %-5level %logger{50} - %msg%n
            UTF-8 
        
        
        
            
            ${LOG_PATH}/debug/log-debug-%d{yyyy-MM-dd}.%i.log
            
            
                500MB
            
            
            30
        
        
        
            debug
            ACCEPT
            DENY
        
    


    
    
        
        ${LOG_PATH}/log_info.log
        
        
            %d{yyyy-MM-dd HH:mm:ss.SSS} [%thread] %-5level %logger{50} - %msg%n
            UTF-8 
        
        
        
            
            ${LOG_PATH}/info/log-info-%d{yyyy-MM-dd}.%i.log
            
            
                500MB
            
            
            30
        
        
        
            info
            ACCEPT
            DENY
        
    


    
    
        
        ${LOG_PATH}/log_warn.log
        
        
            %d{yyyy-MM-dd HH:mm:ss.SSS} [%thread] %-5level %logger{50} - %msg%n
            UTF-8 
        
        
        
            
            ${LOG_PATH}/warn/log-warn-%d{yyyy-MM-dd}.%i.log
            
            
                500MB
            
            
            30
        
        
        
            warn
            ACCEPT
            DENY
        
    


    
    
        
        ${LOG_PATH}/log_error.log
        
        
            %d{yyyy-MM-dd HH:mm:ss.SSS} [%thread] %-5level %logger{50} - %msg%n
            UTF-8 
        
        
        
            
            ${LOG_PATH}/error/log-error-%d{yyyy-MM-dd}.%i.log
            
            
                500MB
            
            
            30
        
        
        
            error
            ACCEPT
            DENY
        
    

    
    
    

    
    
        
            
            
            
            
            
        
    

    
    
        
            
            
            
            
        
    

    
    
        
            
            
            
        
    

注意：：loback配置文件中

name的属性值一定要是当前工程的java代码的完整目录,因为mybatis打印的日志级别是debug级别的，因此需要配置debug级别日志扫描的目录。

在工程java代码目录下创建config的目录在下面创建DruidDBConfig类加入以下代码:

@Configuration
public class DruidDBConfig {

    @Bean
    public ServletRegistrationBean druidServlet() {
        ServletRegistrationBean reg = new ServletRegistrationBean();
        reg.setServlet(new StatViewServlet());
        reg.addUrlMappings("/druid/*");
        //设置控制台管理用户
        reg.addInitParameter("loginUsername","root");
        reg.addInitParameter("loginPassword","root");
        // 禁用HTML页面上的“Reset All”功能
        reg.addInitParameter("resetEnable","false");
        //reg.addInitParameter("allow", "127.0.0.1"); //白名单
        return reg;
    }

    @Bean
    public FilterRegistrationBean filterRegistrationBean() {
        //创建过滤器
        FilterRegistrationBean filterRegistrationBean = new FilterRegistrationBean();
        filterRegistrationBean.setFilter(new WebStatFilter());
        Map initParams = new HashMap();
        //忽略过滤的形式
        initParams.put("exclusions", "*.js,*.gif,*.jpg,*.bmp,*.png,*.css,*.ico,/druid/*");
        filterRegistrationBean.setInitParameters(initParams);
        //设置过滤器过滤路径
        filterRegistrationBean.addUrlPatterns("/*");
        return filterRegistrationBean;
    }
}

注意：这里ServletRegistrationBean 配置bean中通过addInitParameter设置了管控台的用户名密码都是root，可以在这里进行自定义配置也可以将这里的用户名密码通过转移数据库进行定制化配置实现。

在工程java代码目录下创建config的目录在下面创建StudentDataSourceConfig类加入以下代码:

@Configuration
@MapperScan(basePackages ="cn.zhangbox.springboot.dao.student",sqlSessionFactoryRef = "studentSqlSessionFactory")//mybatis接口包扫描
public class StudentDataSourceConfig {

    @Value("${spring.datasource.student.type}")
    private Class dataSourceType;

    /**
     *初始化连接池
     * @return
     */
    @Bean(name = "studentDataSource")
    @ConfigurationProperties(prefix = "spring.datasource.student")
    @Primary
    public DataSource writeDataSource() {
        return DataSourceBuilder.create().type(dataSourceType).build();
    }

    /**
     *
     * 构建 SqlSessionFactory
     * @return
     */
    @Bean(name = "studentSqlSessionFactory")
    @Primary
    public SqlSessionFactory studentSqlSessionFactory(@Qualifier("studentDataSource") DataSource dataSource) throws Exception {
        SqlSessionFactoryBean bean = new SqlSessionFactoryBean();
        bean.setDataSource(dataSource);
        //bean.setTypeAliasesPackage("com.ztzq.data.beans.bigdata");
        bean.setVfs(SpringBootVFS.class);
        bean.setMapperLocations(new PathMatchingResourcePatternResolver().getResources("classpath:mapper/student/*.xml"));
        return bean.getObject();
    }

    /**
     * 配置事物
     * @param dataSource
     * @return
     */
    @Bean(name = "studentTransactionManager")
    @Primary
    public DataSourceTransactionManager TransactionManager(@Qualifier("studentDataSource") DataSource dataSource) {
        return new DataSourceTransactionManager(dataSource);
    }

    /**
     * 构建 SqlSessionTemplate
     * @param sqlSessionFactory
     * @return
     * @throws Exception
     */
    @Bean(name = "studentSqlSessionTemplate")
    @Primary
    public SqlSessionTemplate SqlSessionTemplate(@Qualifier("studentSqlSessionFactory") SqlSessionFactory sqlSessionFactory) throws Exception {
        return new SqlSessionTemplate(sqlSessionFactory);
    }
}

在工程java代码目录下创建config的目录在下面创建TeacherDataSourceConfig类加入以下代码:

@Configuration
@MapperScan(basePackages ="cn.zhangbox.springboot.dao.teacher",sqlSessionFactoryRef = "teacherSqlSessionFactory")//mybatis接口包扫描
public class TecaherDataSourceConfig {

    @Value("${spring.datasource.teacher.type}")
    private Class dataSourceType;

    /**
     *初始化连接池
     * @return
     */
    @Bean(name = "teacherDataSource")
    @ConfigurationProperties(prefix = "spring.datasource.teacher")
    public DataSource writeDataSource() {
        return DataSourceBuilder.create().type(dataSourceType).build();
    }

    /**
     *
     * 构建 SqlSessionFactory
     * @return
     */
    @Bean(name = "teacherSqlSessionFactory")
    public SqlSessionFactory teacherSqlSessionFactory(@Qualifier("teacherDataSource") DataSource dataSource) throws Exception {
        SqlSessionFactoryBean bean = new SqlSessionFactoryBean();
        bean.setDataSource(dataSource);
        //bean.setTypeAliasesPackage("com.ztzq.data.beans.bigdata");
        bean.setVfs(SpringBootVFS.class);
        bean.setMapperLocations(new PathMatchingResourcePatternResolver().getResources("classpath:mapper/teacher/*.xml"));
        return bean.getObject();
    }

    /**
     * 配置事物
     * @param dataSource
     * @return
     */
    @Bean(name = "teacherTransactionManager")
    public DataSourceTransactionManager TransactionManager(@Qualifier("teacherDataSource") DataSource dataSource) {
        return new DataSourceTransactionManager(dataSource);
    }

    /**
     * 构建 SqlSessionTemplate
     * @param sqlSessionFactory
     * @return
     * @throws Exception
     */
    @Bean(name = "teacherSqlSessionTemplate")
    public SqlSessionTemplate SqlSessionTemplate(@Qualifier("teacherSqlSessionFactory") SqlSessionFactory sqlSessionFactory) throws Exception {
        return new SqlSessionTemplate(sqlSessionFactory);
    }
}

在工程java代码目录下创建entity的目录在下面创建Student类加入以下代码:

@Data
@EqualsAndHashCode(callSuper = false)
public class Student {

    private static final long serialVersionUID = 1L;

    /**
     * 主键id
     */
    private Integer sno;
    /**
     * 学生姓名
     */
    private String sname;
    /**
     * 性别
     */
    private String sex;
    /**
     * 生日
     */
    private String birth;
    /**
     * 年龄
     */
    private String age;
    /**
     * 简介
     */
    private String dept;

}

在工程java代码目录下创建entity的目录在下面创建Teacher类加入以下代码:

@Data
@EqualsAndHashCode(callSuper = false)
public class Teacher {

    private static final long serialVersionUID = 1L;

    /**
     * 主键id
     */
    private Integer tno;
    /**
     * 老师姓名
     */
    private String tname;
    /**
     * 性别
     */
    private String sex;
    /**
     * 生日
     */
    private String birth;
    /**
     * 年龄
     */
    private String age;
    /**
     * 简介
     */
    private String dept;

}

在工程java代码目录下创建controller的目录在下面创建StudentConteroller类加入以下代码:

@Controller
@RequestMapping("/student")
public class StudentConteroller {
    private static final Logger LOGGER = LoggerFactory.getLogger(StudentConteroller.class);

    @Autowired
    protected StudentService studentService;

    /**
     * 查询所有的学生信息
     *
     * @param sname
     * @param age
     * @param modelMap
     * @return
     */
    @ResponseBody
    @GetMapping("/list")
    public String list(String sname, Integer age, ModelMap modelMap) {
        String json = null;
        try {
            List studentList = studentService.getStudentList(sname, age);
            modelMap.put("ren_code", "0");
            modelMap.put("ren_msg", "查询成功");
            modelMap.put("studentList", studentList);
            json = JSON.toJSONString(modelMap);
        } catch (Exception e) {
            e.printStackTrace();
            modelMap.put("ren_code", "0");
            modelMap.put("ren_msg", "查询失败===>" + e);
            LOGGER.error("查询失败===>" + e);
            json = JSON.toJSONString(modelMap);
        }
        return json;
    }
}

在工程java代码目录下创建controller的目录在下面创建TeacherConteroller类加入以下代码:

@Controller
@RequestMapping("/teacher")
public class TeacherConteroller {
    private static final Logger LOGGER = LoggerFactory.getLogger(TeacherConteroller.class);

    @Autowired
    protected TeacherService teacherService;

    /**
     * 查询所有的老师信息
     *
     * @param tname
     * @param age
     * @param modelMap
     * @return
     */
    @ResponseBody
    @GetMapping("/list")
    public String list(String tname, Integer age, ModelMap modelMap) {
        String json = null;
        try {
            List teacherList = teacherService.getTeacherList(tname, age);
            modelMap.put("ren_code", "0");
            modelMap.put("ren_msg", "查询成功");
            modelMap.put("teacherList", teacherList);
            json = JSON.toJSONString(modelMap);
        } catch (Exception e) {
            e.printStackTrace();
            modelMap.put("ren_code", "0");
            modelMap.put("ren_msg", "查询失败===>" + e);
            LOGGER.error("查询失败===>" + e);
            json = JSON.toJSONString(modelMap);
        }
        return json;
    }
}

在工程java代码目录下面创建service目录在下面创建StudentService类加入以下代码:

public interface StudentService {

    /**
     * 查询所有的学生信息
     *
     * @param sname
     * @param age
     * @return
     */
    List getStudentList(String sname, Integer age);
}

在工程java代码目录下面创建service目录在下面创建TeacherService类加入以下代码:

public interface TeacherService {

    /**
     * 查询所有的老师信息
     *
     * @param tname
     * @param age
     * @return
     */
    List getTeacherList(String tname, Integer age);
}

在工程java代码目录下的service的目录下面创建impl目录在下面创建StudentServiceImpl类加入以下代码:

@Service("StudentService")
@Transactional(readOnly = true, rollbackFor = Exception.class)
public class StudentServiceImpl implements StudentService {

    @Autowired
    StudentDao studentDao;

    @Override
    public List getStudentList(String sname, Integer age) {
        return studentDao.getStudentList(sname,age);
    }
}

在工程java代码目录下的service的目录下面创建impl目录在下面创建TeacherServiceImpl类加入以下代码:

@Service("TeacherService")
@Transactional(readOnly = true, rollbackFor = Exception.class)
public class TeacherServiceImpl implements TeacherService {

    @Autowired
    TeacherDao teacherDao;

    @Override
    public List getTeacherList(String tname, Integer age) {
        return teacherDao.getTeacherList(tname,age);
    }
}

在工程java代码目录下创建dao的目录下面创建student目录在此目录下创建StudentDao类加入以下代码:

public interface StudentDao {

    List getStudentList(@Param("sname")String sname, @Param("age")Integer age);

}

在工程java代码目录下创建dao的目录下面创建teacher目录在此目录下创建TeacherDao类加入以下代码:

public interface TeacherDao {

    List getTeacherList(@Param("tname") String tname, @Param("age") Integer age);

}

在工程resource目录下创建mapper的目录下创建student目录在此目录下面创建StudentMapper.xml映射文件加入以下代码:

    
    
        SELECT
            s.sno,
            s.sname,
            s.sex,
            s.dept,
            s.birth,
            s.age
        FROM
            student s
        WHERE
        1 = 1
        
            and s.sname = #{sname}
        
        
            and s.age = #{age}
        
    

在工程resource目录下创建mapper的目录下创建teacher目录在此目录下面创建TeacherMapper.xml映射文件加入以下代码:

    
    
        SELECT
            s.tno,
            s.tname,
            s.sex,
            s.dept,
            s.birth,
            s.age
        FROM
            teacher s
        WHERE
        1 = 1
        
            and s.tname = #{tname}
        
        
            and s.age = #{age}
        
    

@SpringBootApplication
public class SpringBootManyDataSourceApplication extends SpringBootServletInitializer {

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

 .   ____          _            __ _ _
 / / ___"_ __ _ _(_)_ __  __ _    
( ( )\___ | "_ | "_| | "_ / _` |    
 /  ___)| |_)| | | | | || (_| |  ) ) ) )
  "  |____| .__|_| |_|_| |_\__, | / / / /
 =========|_|==============|___/=/_/_/_/
 :: Spring Boot ::        (v1.5.3.RELEASE)

2018-07-09 19:58:22.757  INFO 10096 --- [           main] .z.s.SpringBootManyDataSourceApplication : Starting SpringBootManyDataSourceApplication on 99IHXFJDHAQ7H7N with PID 10096 (started by Administrator in D:开源项目spring-boot-study)
2018-07-09 19:58:22.780  INFO 10096 --- [           main] .z.s.SpringBootManyDataSourceApplication : The following profiles are active: dev
2018-07-09 19:58:22.987  INFO 10096 --- [           main] ationConfigEmbeddedWebApplicationContext : Refreshing org.springframework.boot.context.embedded.AnnotationConfigEmbeddedWebApplicationContext@35e5d0e5: startup date [Mon Jul 09 19:58:22 CST 2018]; root of context hierarchy
2018-07-09 19:58:23.460  INFO 10096 --- [kground-preinit] o.h.validator.internal.util.Version      : HV000001: Hibernate Validator 5.3.5.Final
2018-07-09 19:58:24.220  INFO 10096 --- [           main] o.s.b.f.s.DefaultListableBeanFactory     : Overriding bean definition for bean "filterRegistrationBean" with a different definition: replacing [Root bean: class [null]; scope=; abstract=false; lazyInit=false; autowireMode=3; dependencyCheck=0; autowireCandidate=true; primary=false; factoryBeanName=druidDBConfig; factoryMethodName=filterRegistrationBean; initMethodName=null; destroyMethodName=(inferred); defined in class path resource [cn/zhangbox/springboot/config/DruidDBConfig.class]] with [Root bean: class [null]; scope=; abstract=false; lazyInit=false; autowireMode=3; dependencyCheck=0; autowireCandidate=true; primary=false; factoryBeanName=com.alibaba.druid.spring.boot.autoconfigure.stat.DruidWebStatFilterConfiguration; factoryMethodName=filterRegistrationBean; initMethodName=null; destroyMethodName=(inferred); defined in class path resource [com/alibaba/druid/spring/boot/autoconfigure/stat/DruidWebStatFilterConfiguration.class]]
2018-07-09 19:58:25.440  INFO 10096 --- [           main] s.b.c.e.t.TomcatEmbeddedServletContainer : Tomcat initialized with port(s): 8080 (http)
2018-07-09 19:58:25.457  INFO 10096 --- [           main] o.apache.catalina.core.StandardService   : Starting service Tomcat
2018-07-09 19:58:25.459  INFO 10096 --- [           main] org.apache.catalina.core.StandardEngine  : Starting Servlet Engine: Apache Tomcat/8.5.14
2018-07-09 19:58:25.594  INFO 10096 --- [ost-startStop-1] o.a.c.c.C.[Tomcat].[localhost].[/]       : Initializing Spring embedded WebApplicationContext
2018-07-09 19:58:25.594  INFO 10096 --- [ost-startStop-1] o.s.web.context.ContextLoader            : Root WebApplicationContext: initialization completed in 2608 ms
2018-07-09 19:58:26.138  INFO 10096 --- [ost-startStop-1] o.s.b.w.servlet.ServletRegistrationBean  : Mapping servlet: "statViewServlet" to [/druid/*]
2018-07-09 19:58:26.139  INFO 10096 --- [ost-startStop-1] o.s.b.w.servlet.ServletRegistrationBean  : Mapping servlet: "dispatcherServlet" to [/]
2018-07-09 19:58:26.140  INFO 10096 --- [ost-startStop-1] o.s.b.w.servlet.ServletRegistrationBean  : Mapping servlet: "statViewServlet" to [/druid/*]
2018-07-09 19:58:26.141  INFO 10096 --- [ost-startStop-1] o.s.b.w.servlet.ServletRegistrationBean  : Servlet statViewServlet was not registered (possibly already registered?)
2018-07-09 19:58:26.146  INFO 10096 --- [ost-startStop-1] o.s.b.w.servlet.FilterRegistrationBean   : Mapping filter: "characterEncodingFilter" to: [/*]
2018-07-09 19:58:26.147  INFO 10096 --- [ost-startStop-1] o.s.b.w.servlet.FilterRegistrationBean   : Mapping filter: "hiddenHttpMethodFilter" to: [/*]
2018-07-09 19:58:26.148  INFO 10096 --- [ost-startStop-1] o.s.b.w.servlet.FilterRegistrationBean   : Mapping filter: "httpPutFormContentFilter" to: [/*]
2018-07-09 19:58:26.148  INFO 10096 --- [ost-startStop-1] o.s.b.w.servlet.FilterRegistrationBean   : Mapping filter: "requestContextFilter" to: [/*]
2018-07-09 19:58:26.149  INFO 10096 --- [ost-startStop-1] o.s.b.w.servlet.FilterRegistrationBean   : Mapping filter: "webStatFilter" to urls: [/*]
2018-07-09 19:58:27.694  INFO 10096 --- [           main] s.w.s.m.m.a.RequestMappingHandlerAdapter : Looking for @ControllerAdvice: org.springframework.boot.context.embedded.AnnotationConfigEmbeddedWebApplicationContext@35e5d0e5: startup date [Mon Jul 09 19:58:22 CST 2018]; root of context hierarchy
2018-07-09 19:58:27.792  INFO 10096 --- [           main] s.w.s.m.m.a.RequestMappingHandlerMapping : Mapped "{[/student/list],methods=[GET]}" onto public java.lang.String cn.zhangbox.springboot.controller.StudentConteroller.list(java.lang.String,java.lang.Integer,org.springframework.ui.ModelMap)
2018-07-09 19:58:27.794  INFO 10096 --- [           main] s.w.s.m.m.a.RequestMappingHandlerMapping : Mapped "{[/teacher/list],methods=[GET]}" onto public java.lang.String cn.zhangbox.springboot.controller.TeacherConteroller.list(java.lang.String,java.lang.Integer,org.springframework.ui.ModelMap)
2018-07-09 19:58:27.796  INFO 10096 --- [           main] s.w.s.m.m.a.RequestMappingHandlerMapping : Mapped "{[/error]}" onto public org.springframework.http.ResponseEntity> org.springframework.boot.autoconfigure.web.BasicErrorController.error(javax.servlet.http.HttpServletRequest)
2018-07-09 19:58:27.796  INFO 10096 --- [           main] s.w.s.m.m.a.RequestMappingHandlerMapping : Mapped "{[/error],produces=[text/html]}" onto public org.springframework.web.servlet.ModelAndView org.springframework.boot.autoconfigure.web.BasicErrorController.errorHtml(javax.servlet.http.HttpServletRequest,javax.servlet.http.HttpServletResponse)
2018-07-09 19:58:27.837  INFO 10096 --- [           main] o.s.w.s.handler.SimpleUrlHandlerMapping  : Mapped URL path [/webjars/**] onto handler of type [class org.springframework.web.servlet.resource.ResourceHttpRequestHandler]
2018-07-09 19:58:27.837  INFO 10096 --- [           main] o.s.w.s.handler.SimpleUrlHandlerMapping  : Mapped URL path [/**] onto handler of type [class org.springframework.web.servlet.resource.ResourceHttpRequestHandler]
2018-07-09 19:58:27.893  INFO 10096 --- [           main] o.s.w.s.handler.SimpleUrlHandlerMapping  : Mapped URL path [/**/favicon.ico] onto handler of type [class org.springframework.web.servlet.resource.ResourceHttpRequestHandler]
2018-07-09 19:58:28.836  INFO 10096 --- [           main] o.s.j.e.a.AnnotationMBeanExporter        : Registering beans for JMX exposure on startup
2018-07-09 19:58:28.837  INFO 10096 --- [           main] o.s.j.e.a.AnnotationMBeanExporter        : Bean with name "studentDataSource" has been autodetected for JMX exposure
2018-07-09 19:58:28.838  INFO 10096 --- [           main] o.s.j.e.a.AnnotationMBeanExporter        : Bean with name "teacherDataSource" has been autodetected for JMX exposure
2018-07-09 19:58:28.838  INFO 10096 --- [           main] o.s.j.e.a.AnnotationMBeanExporter        : Bean with name "statFilter" has been autodetected for JMX exposure
2018-07-09 19:58:28.846  INFO 10096 --- [           main] o.s.j.e.a.AnnotationMBeanExporter        : Located MBean "studentDataSource": registering with JMX server as MBean [com.alibaba.druid.pool:name=studentDataSource,type=DruidDataSource]
2018-07-09 19:58:28.849  INFO 10096 --- [           main] o.s.j.e.a.AnnotationMBeanExporter        : Located MBean "teacherDataSource": registering with JMX server as MBean [com.alibaba.druid.pool:name=teacherDataSource,type=DruidDataSource]
2018-07-09 19:58:28.851  INFO 10096 --- [           main] o.s.j.e.a.AnnotationMBeanExporter        : Located MBean "statFilter": registering with JMX server as MBean [com.alibaba.druid.filter.stat:name=statFilter,type=StatFilter]
2018-07-09 19:58:28.877  INFO 10096 --- [           main] o.a.coyote.http11.Http11NioProtocol      : Initializing ProtocolHandler ["http-nio-8080"]
2018-07-09 19:58:28.905  INFO 10096 --- [           main] o.a.coyote.http11.Http11NioProtocol      : Starting ProtocolHandler ["http-nio-8080"]
2018-07-09 19:58:28.930  INFO 10096 --- [           main] o.a.tomcat.util.net.NioSelectorPool      : Using a shared selector for servlet write/read
2018-07-09 19:58:28.965  INFO 10096 --- [           main] s.b.c.e.t.TomcatEmbeddedServletContainer : Tomcat started on port(s): 8080 (http)
2018-07-09 19:58:28.972  INFO 10096 --- [           main] .z.s.SpringBootManyDataSourceApplication : Started SpringBootManyDataSourceApplication in 8.519 seconds (JVM running for 12.384)
2018-07-09 19:58:37.626  INFO 10096 --- [nio-8080-exec-1] o.a.c.c.C.[Tomcat].[localhost].[/]       : Initializing Spring FrameworkServlet "dispatcherServlet"
2018-07-09 19:58:37.626  INFO 10096 --- [nio-8080-exec-1] o.s.web.servlet.DispatcherServlet        : FrameworkServlet "dispatcherServlet": initialization started
2018-07-09 19:58:37.660  INFO 10096 --- [nio-8080-exec-1] o.s.web.servlet.DispatcherServlet        : FrameworkServlet "dispatcherServlet": initialization completed in 33 ms
2018-07-09 19:58:37.981  INFO 10096 --- [nio-8080-exec-1] com.alibaba.druid.pool.DruidDataSource   : {dataSource-1} inited
2018-07-09 19:58:41.381  INFO 10096 --- [nio-8080-exec-2] com.alibaba.druid.pool.DruidDataSource   : {dataSource-2} inited

2018-07-09 19:58:22.779 [main] DEBUG c.z.springboot.SpringBootManyDataSourceApplication - Running with Spring Boot v1.5.3.RELEASE, Spring v4.3.8.RELEASE
2018-07-09 19:58:38.386 [http-nio-8080-exec-1] DEBUG c.z.s.dao.student.StudentDao.getStudentList - ==>  Preparing: SELECT s.sno, s.sname, s.sex, s.dept, s.birth, s.age FROM student s WHERE 1 = 1 
2018-07-09 19:58:38.409 [http-nio-8080-exec-1] DEBUG c.z.s.dao.student.StudentDao.getStudentList - ==> Parameters: 
2018-07-09 19:58:38.436 [http-nio-8080-exec-1] DEBUG c.z.s.dao.student.StudentDao.getStudentList - <==      Total: 2
2018-07-09 19:58:41.461 [http-nio-8080-exec-2] DEBUG c.z.s.dao.teacher.TeacherDao.getTeacherList - ==>  Preparing: SELECT s.tno, s.tname, s.sex, s.dept, s.birth, s.age FROM teacher s WHERE 1 = 1 
2018-07-09 19:58:41.462 [http-nio-8080-exec-2] DEBUG c.z.s.dao.teacher.TeacherDao.getTeacherList - ==> Parameters: 
2018-07-09 19:58:41.472 [http-nio-8080-exec-2] DEBUG c.z.s.dao.teacher.TeacherDao.getTeacherList - <==      Total: 1

这里使用logback配置中将不同级别的日志设置了在不同文件中打印，这样很大程度上方便项目出问题查找问题。

druid链接池不知道怎么配置可以参考我写的这篇文章:
SpringBoot进阶教程 | 第三篇：整合Druid连接池以及Druid监控

Spring Boot整合Mybatis实现多数据源源码

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