Java 在Spring Boot和MyBatis项目中配置多个数据源时，会发生BindingException

这个问题出现了。我尝试在Spring Boot和MyBatis项目中配置两个数据源，但出现异常：

org.apache.ibatis.binding.BindingException:无效的绑定语句 （未找到）：com.bookSystem.mapper.UserDao.findByDomain位于 org.apache.ibatis.binding.MapperMethod$SqlCommand。（MapperMethod.java:227） ~[mybatis-3.4.6.jar:3.4.6]at org.apache.ibatis.binding.MapperMethod.（MapperMethod.java:49） ~[mybatis-3.4.6.jar:3.4.6]at org.apache.ibatis.binding.MapperProxy.cachedMapperMethod（MapperProxy.java:65） ~[mybatis-3.4.6.jar:3.4.6]at org.apache.ibatis.binding.MapperProxy.invoke（MapperProxy.java:58） ~[mybatis-3.4.6.jar:3.4.6]at com.sun.proxy.$Proxy83.findByDomain（未知源）~[na:na]at bookSystem.serviceImp.UserServiceImp.findByDomain（UserServiceImp.java:72） sun.reflect.NativeMethodAccessorImpl.invoke0（本机）处的~[classes/:na] 方法）~（na:1.8.0_171）at invoke（NativeMethodAccessorImpl.java:62） ~（na:1.8.0_171）at sun.reflect.DelegatingMethodAccessorImpl.invoke（DelegatingMethodAccessorImpl.java:43） ~[na:1.8.0_171]位于java.lang.reflect.Method.invoke（Method.java:498） ~[na:1.8.0_171]

应用程序属性

# multiple datases
spring.datasource.primary.driverClassName = com.mysql.jdbc.Driver
spring.datasource.primary.url = jdbc:mysql://127.0.0.1/book?useSSL=false&useUnicode=true&characterEncoding=UTF-8
spring.datasource.primary.username = root
spring.datasource.primary.password = 123456
spring.datasource.primary.initialization-mode=always

spring.datasource.second.driverClassName = com.mysql.jdbc.Driver
spring.datasource.second.url = jdbc:mysql://127.0.0.1/newBook?useSSL=false&useUnicode=true&characterEncoding=UTF-8
spring.datasource.second.username = root
spring.datasource.second.password = 123456
spring.datasource.second.initialization-mode=always

mybatis.mapper-locations=classpath:mybatis/mapper/*.xml

映射程序目录

项目开始

@SpringBootApplication( exclude = {
        DataSourceAutoConfiguration.class, 
        DataSourceTransactionManagerAutoConfiguration.class
})
@EnableTransactionManagement
public class BookSystemApplication {
}

数据源配置

@Configuration
public class DataSourceConfig {
    @Bean(name = "primaryDataSource")
    @Primary
    @ConfigurationProperties(prefix = "spring.datasource.primary")
    public DataSource primaryDataSource() {
        return DataSourceBuilder.create().build();
    }

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

主数据源

@Configuration
@MapperScan(basePackages = {"com.bookSystem.mapper"}, sqlSessionFactoryRef = "primarySqlSessionFactory")
public class MyBatisPrimaryDbConfig {
    @Autowired
    @Qualifier("primaryDataSource")
    private DataSource primaryDataSource;

    @Bean
    public SqlSessionFactory primarySqlSessionFactory() throws Exception {
        SqlSessionFactoryBean factoryBean = new SqlSessionFactoryBean();
        factoryBean.setDataSource(primaryDataSource);
        return factoryBean.getObject();
    }

    @Bean
    public SqlSessionTemplate primarySqlSessionTempmlate() throws  Exception {
        SqlSessionTemplate template = new SqlSessionTemplate(primarySqlSessionFactory());
        return template;
    }
}

交易

@Configuration
public class TransactionConfig {
    @Autowired
    @Qualifier("primaryDataSource")
    private DataSource primary;

    @Autowired
    @Qualifier("secondDataSource")
    private DataSource second;

    @Bean(name="primaryTx")
    @Primary
    public PlatformTransactionManager primaryTransaction() {
        return new DataSourceTransactionManager(primary);
    }

    @Bean(name="secondTx")
    public PlatformTransactionManager secondTransaction() {
        return new DataSourceTransactionManager(second);
    }
}

用户道

package com.bookSystem.mapper;

@Mapper
public interface UserDao {
    public User findByDomain(String domainName);
}

userMapper.xml，使用主数据源

<mapper namespace = "com.bookSystem.mapper.UserDao">
    <select id="findByDomain" resultMap= "userResultMap">
        SELECT
            u.userId as user_user_id,
            u.userName as user_user_name,
            u.domainName as user_domain_name,
            u.department as user_department,
            u.title as user_title,
            u.date as user_date,
            u.password as user_password,
            u.accountRole as user_account_role
        FROM USER u
        WHERE u.domainName = #{domainName} 
    </select>

@Service("UserService")
public class UserServiceImp implements UserService {
    @Override
    public User findByDomain(String domainName) {
        User user = userDao.findByDomain(domainName);
        return user;
    } 
}