myBatis 从 spring分离 进行快速单元测试

zzss

　　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.iyunv.com/blog/1237351