初学SSM+mybatis单元测试遇到的问题，dao注入后为null

Dao层注入失败，查看后，发现注解都写的无误，经朋友的指点，

在测试类上加了一句“@RunWith(SpringJUnit4ClassRunner.class)

@ContextConfiguration(locations={“classpath:spring/applicationContext-tx.xml”,“classpath:spring/applicationContext-service.xml”,“classpath:spring/applicationContext-dao.xml”})” 经测试，Dao可以注入，不再为null ---------------------  作者：旅途上的背包客  来源：CSDN  原文：https://blog.csdn.net/u012799877/article/details/83056657?utm_source=copy  版权声明：本文为博主原创文章，转载请附上博文链接！

@RunWith(SpringJUnit4ClassRunner.class)@ContextConfiguration(locations={"classpath:spring/applicationContext-tx.xml","classpath:spring/applicationContext-service.xml","classpath:spring/applicationContext-dao.xml"})public class TaskInfoTest {    @Autowired TaskService taskService;    @Test public void test(){        TaskInfo taskInfo = new TaskInfo();        taskInfo.setTid(2);        taskInfo.setTname("taskname");        taskInfo.setStatus("成功");        taskInfo.setBtime("2018-10-12");        taskInfo.setEtime("2018-10-15");        taskService.add(taskInfo);    }}

原文地址：https://www.cnblogs.com/songhaozhi080616/p/9790045.html