myBatis 从 spring分离 进行快速单元测试

项目采用mybatis + spring开发，这是以前的测试代码, 【运行需要30s】

private static MemberService memberService;
	@BeforeClass
	public static void setUp() throws Exception{
		ApplicationContext context = new ClassPathXmlApplicationContext("applicationContext.xml");
		memberService = (MemberService)context.getBean("memberService");

 

 这种方式的不好，要实例化整个spring容器，如果项目很大，一个单元测试运行的时间将会很长；

 下面我把myBatis从spring进行分离，分离后进行单元测试速度很快：下面是改进后的测试类，【运行只需3s】

 

private static MemberService memberService;
	@BeforeClass
	public static void setUp() throws Exception{
		MemberDao memberDao = new MemberDao();
		memberDao.setMemberMapper((MemberMapper)SessionFactory.getMapper(MemberMapper.class));
		MemberServiceImpl memberServiceimpl = new MemberServiceImpl();
		memberServiceimpl.setMemberDao(memberDao);
		memberService = memberServiceimpl;

1，configuration xml

 

<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE configuration PUBLIC "-//mybatis.org//DTD Config 3.0//EN"  "http://mybatis.org/dtd/mybatis-3-config.dtd">  
<configuration>
 <settings>
        <!-- changes from the defaults -->
        <setting name="lazyLoadingEnabled" value="false" />
    </settings>
    <typeAliases>
       
        <!-- 会员实体begin -->
        <typeAlias alias="member" type="com.***.project.member.domain.Member" />
        <!-- 会员实体end -->
        
    </typeAliases>
    <plugins>  
        <!-- 指定数据库分页方言Dialect, 其它方言:OracleDialect,SQLServerDialect,SybaseDialect,DB2Dialect,PostgreSQLDialect,MySQLDialect,DerbyDialect-->  
        <plugin interceptor="com.***.project.common.mybatis.interceptor.OffsetLimitInterceptor">  
            <property name="dialectClass" value="com.***.project.common.mybatis.dialect.OracleDialect"/>  
        </plugin>  
    </plugins>
	<environments default="develop">
		<environment id="develop">
			<transactionManager type="com.***.project.utils.TransactionManager">
			</transactionManager>
			<dataSource type="POOLED" >
				<property name="driver" value="oracle.jdbc.driver.OracleDriver" />
				<property name="url" value="jdbc:oracle:thin:@****:***" />
				<property name="username" value="***" />
				<property name="password" value="***" />
			</dataSource>
		</environment>
	</environments>
	<mappers>
		<mapper resource="mappers/MemberMapper.xml"/>
	</mappers>
</configuration>

2， TransactionManager类 自定义事务管理，主要是用作自动提交,autoCommit

 

public class TransactionManager implements TransactionFactory {

	@Override
	public Transaction newTransaction(Connection conn, boolean autoCommit) {
		Transaction  tx = new JdbcTransaction(conn, true);
		return tx;
	}

	@Override
	public void setProperties(Properties arg0) {
		
	}

}

 3，下面是我的核心类 ，主要是获取sqlSession与Mapper接口

 

public class SessionFactory {
	
	private static SqlSessionFactory sessionFactory;
	private SessionFactory(){
	}
	static{
		String resource = "com/***/project/utils/mybatis.xml";
		Reader reader;
		try {
			reader = Resources.getResourceAsReader(resource);
			sessionFactory = new SqlSessionFactoryBuilder().build(reader);
		} catch (IOException e) {
			e.printStackTrace();
		}	
	}
	public static SqlSession getSqlSession(){
		return sessionFactory.openSession();
	}
	public static Object getMapper(Class cls){
		return MapperProxy.newMapperProxy(cls, getSqlSession());
	}
}

小结：把dao层分离可以进行快速的单元测试（严格来说是集成测试），但如果自动化运行所有的测试，也可以直接从spring容器中获取service进行测试，可参昭我的文章http://mingliang-luo.iteye.com/blog/1237351