SpringMVC+Mybatis整合配置（纯javaconfig，包含配置注解式事务）

package com.amiu.spring.config;

import javax.servlet.ServletContext;
import javax.servlet.ServletException;

import org.springframework.web.servlet.support.AbstractAnnotationConfigDispatcherServletInitializer;
import org.springframework.web.util.Log4jConfigListener;

public class WebInitializer extends AbstractAnnotationConfigDispatcherServletInitializer{

	@Override
	protected Class
 [] getRootConfigClasses() {
		// TODO Auto-generated method stub
		return new Class[]{MvcConfig.class,MybatisConfig.class};
	}

	@Override
	protected Class
 [] getServletConfigClasses() {
		// TODO Auto-generated method stub
		return null;
	}

	@Override
	protected String[] getServletMappings() {
		// TODO Auto-generated method stub
		return new String[]{"/"};
	}
	
	/**
	 * 这个方法tomcat启动就会调用,可以代替web.xml注册filter,listener,servlet等
	 */
	@Override
	public void onStartup(ServletContext container) throws ServletException {
		//config log4j
		container.setInitParameter("log4jConfigLocation", "classpath:log4j.properties");
		container.addListener(Log4jConfigListener.class);
		super.onStartup(container);
	}
	
}

package com.amiu.spring.config;

import java.io.FileNotFoundException;
import java.io.IOException;
import java.util.Properties;

import org.mybatis.spring.SqlSessionFactoryBean;
import org.mybatis.spring.annotation.MapperScan;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.beans.factory.annotation.Value;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import org.springframework.context.annotation.PropertySource;
import org.springframework.core.io.support.PropertiesLoaderUtils;
import org.springframework.jdbc.datasource.DataSourceTransactionManager;
import org.springframework.transaction.annotation.EnableTransactionManagement;
import org.springframework.core.env.Environment;

import com.alibaba.druid.pool.DruidDataSource;

@Configuration
//启用注解事务管理，使用CGLib代理 
@EnableTransactionManagement(proxyTargetClass = true)
//加载资源文件  
@PropertySource({"classpath:dbConfig.properties"}) 
@MapperScan(basePackages="com.amiu.autoMybatis.mapper")
public class MybatisConfig {
  
  @Autowired Environment env;//还可以使用Environment获取properties信息
  //绑定资源属性 
  @Value("${db.driver}")
  String driver;
  @Value("${db.url}")
  String url;
  @Value("${db.username}")
  String username;
  @Value("${db.password}")
  String password;
  
  //这里我们使用的DataSource是阿里的，也可以换为其他的，比如Mybatis自带的PooledDataSource
  @Bean
  public DruidDataSource druidDataSource() throws IOException{
    //不用@Value我们可以使用Environment获取properties信息
    //driver = env.getProperty("db.username");
    //url = env.getProperty("db.url");
    //username = env.getProperty("db.username");
    //password = env.getProperty("db.password");

    DruidDataSource druidDataSource = new DruidDataSource();
    druidDataSource.setDriverClassName(driver);
    druidDataSource.setUrl(url);
    druidDataSource.setUsername(username);
    druidDataSource.setPassword(password);
    
    return druidDataSource;
  }
  
  //配置事务管理器
  @Bean
  public DataSourceTransactionManager transactionManager() throws IOException{
    //这里的数据源要和配置SqlSessionFactoryBean中配置的数据源相同，事务才会生效
    DataSourceTransactionManager transactionManager = 
        new DataSourceTransactionManager(druidDataSource());
    return transactionManager;
  }
  //配置SqlSessionFactoryBean
  @Bean
  public SqlSessionFactoryBean sqlSessionFactory() throws IOException{
    SqlSessionFactoryBean sqlSessionFactoryBean = new SqlSessionFactoryBean();
    sqlSessionFactoryBean.setDataSource(druidDataSource());
//    sqlSessionFactoryBean.setTypeAliasesPackage("com.amiu");
//    sqlSessionFactoryBean.setMapperLocations(
//            new PathMatchingResourcePatternResolver()
//              .getResources("classpath:mapper/*.xml"));
    return sqlSessionFactoryBean;
  }
    
  //添加解析类才能让@PropertySource正确解析出${}中的值 
  @Bean 
  public static PropertySourcesPlaceholderConfigurer propertyConfigInDev() { 
    return new PropertySourcesPlaceholderConfigurer(); 
  } 
  
}

package com.amiu.spring.config;

import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.ComponentScan;
import org.springframework.context.annotation.Configuration;
import org.springframework.context.annotation.PropertySource;
import org.springframework.context.support.PropertySourcesPlaceholderConfigurer;
import org.springframework.http.MediaType;
import org.springframework.web.servlet.config.annotation.ContentNegotiationConfigurer;
import org.springframework.web.servlet.config.annotation.DefaultServletHandlerConfigurer;
import org.springframework.web.servlet.config.annotation.EnableWebMvc;
import org.springframework.web.servlet.config.annotation.ViewResolverRegistry;
import org.springframework.web.servlet.config.annotation.WebMvcConfigurerAdapter;
import org.springframework.web.servlet.view.json.MappingJackson2JsonView;

@Configuration
@EnableWebMvc
@ComponentScan("com.amiu")
public class MvcConfig extends WebMvcConfigurerAdapter {
	
	@Override
	public void configureDefaultServletHandling(
			DefaultServletHandlerConfigurer configurer) {
			configurer.enable();
	}

}