Bean named ‘Target‘ is expected to be of type ‘com.itheima.aop.Target‘ but was actually of type ‘com

这是一个接口实现方法

package com.itheima.aop;

public class Target implements TargetInterface{
    public void save() {
        System.out.println("save running.....");
    }
}

这是定义的接口

package com.itheima.aop;

public interface TargetInterface {
    public void save();
}

用Spring集合junit进行测试：

@RunWith(SpringJUnit4ClassRunner.class)
@ContextConfiguration("classpath:applicationContext.xml")
public class AopTest {

    @Autowired
    private Target target;

    @Test
    public void test1() {
        target.save();
    }
}

报错如下：
Bean named ‘Target’ is expected to be of type ‘com.itheima.aop.Target’ but was actually of type 'com

修改代码，把target定义为TargetInterface，不报错：

@RunWith(SpringJUnit4ClassRunner.class)
@ContextConfiguration("classpath:applicationContext.xml")
public class AopTest {

    @Autowired
    private TargetInterface target;

    @Test
    public void test1() {
        target.save();
    }
}