package com.example.spring.comfig;
import org.springframework.web.context.WebApplicationContext;
import org.springframework.web.context.support.AnnotationConfigWebApplicationContext;
import org.springframework.web.servlet.support.AbstractDispatcherServletInitializer;
public class ServletContainerInitConfig extends AbstractDispatcherServletInitializer {
    @Override
    protected WebApplicationContext createServletApplicationContext() {
        AnnotationConfigWebApplicationContext ctx=new AnnotationConfigWebApplicationContext();
        ctx.register(SpringmvcConfig.class);
        return ctx;
    }
    @Override
    protected String[] getServletMappings() {
        return new String[]{"/"};
    }
    @Override
    protected WebApplicationContext createRootApplicationContext() {
        return null;
    }
}

package com.example.spring.comfig;
import org.springframework.context.annotation.*;
import org.springframework.transaction.annotation.EnableTransactionManagement;
@Configuration
@ComponentScan("com.example.spring")
@PropertySource("classpath:druid.properties")
@Import({JdbcConfig.class,MybatisConfig.class})
@EnableAspectJAutoProxy
@EnableTransactionManagement
public class SpringConfig {
}

package com.example.spring.comfig;
import org.mybatis.spring.SqlSessionFactoryBean;
import org.mybatis.spring.mapper.MapperScannerConfigurer;
import org.springframework.context.annotation.Bean;
import javax.sql.DataSource;
public class MybatisConfig {
    @Bean
    public SqlSessionFactoryBean sqlSessionFactory (DataSource dataSource){
        SqlSessionFactoryBean sqlSessionFactoryBean=new SqlSessionFactoryBean();
        sqlSessionFactoryBean.setTypeAliasesPackage("com.example.spring.domain");
        sqlSessionFactoryBean.setDataSource(dataSource);
        return sqlSessionFactoryBean;
    }
    @Bean
    public MapperScannerConfigurer mapperScannerConfigurer(){
        MapperScannerConfigurer mapperScannerConfigurer=new MapperScannerConfigurer();
        mapperScannerConfigurer.setBasePackage("com.example.spring.dao");
        return mapperScannerConfigurer;
    }
}

package com.example.spring.comfig;
import com.alibaba.druid.pool.DruidDataSource;
import org.springframework.beans.factory.annotation.Value;
import org.springframework.context.annotation.Bean;
import org.springframework.jdbc.datasource.DataSourceTransactionManager;
import org.springframework.transaction.PlatformTransactionManager;
import javax.sql.DataSource;
public class JdbcConfig {
    @Value("${jdbc.driver}")
    private String driver;
    @Value("${jdbc.url}")
    private String url;
    @Value("${jdbc.username}")
    private String username;
    @Value("${jdbc.password}")
    private String password;
    @Bean
    public DataSource dataSource(){
        DruidDataSource dataSource=new DruidDataSource();
        dataSource.setDriverClassName(driver);
        dataSource.setUrl(url);
        dataSource.setUsername(username);
        dataSource.setPassword(password);
        return dataSource;
    }
    @Bean
    public PlatformTransactionManager transactionManager(DataSource dataSource){
        DataSourceTransactionManager transactionManager=new DataSourceTransactionManager();
        transactionManager.setDataSource(dataSource);
        return transactionManager;
    }
}