spring自动装配失败但appcontext解析bean

发布于 2024-10-30 14:26:13 字数 681 浏览 4 评论 0原文

我对春天有以下问题。我有一个网络应用程序和一个域项目。域项目包含一个 StudentService，应通过自动装配将其注入到 Web 应用程序的类中。我已将和添加到 appcontext.xml 中。

这是来自web应用程序的类：

@Component
public class JSONToDomainObjects
{

@Autowired
private StudentService studentService;

private void bindSubmissionValuesToDomainObjects(Integer userKey) throws Exception
{
 Student student =  studentService.getStudentBySlNumber(userKey);
}
}

然后是studentservice：

@Service
public class StudentService
{
  ..
}

所以一旦我启动我的应用程序，我就会看到studentService为空，但是当我获取appcontext并调用方法getBean（“studentService”）时，会返回一个studentservice实例。我用的是spring 3.0.5。有人知道自动装配失败的原因吗？

干杯，

迈克尔

原文

i have the following issue with spring. I have a webapp and a domain project. the domain project contains a studentService which should be injected through autowiring in a class of the webapp. I've added and to the appcontext.xml.

this is the class from the webapp:

@Component
public class JSONToDomainObjects
{

@Autowired
private StudentService studentService;

private void bindSubmissionValuesToDomainObjects(Integer userKey) throws Exception
{
 Student student =  studentService.getStudentBySlNumber(userKey);
}
}

then the studentservice:

@Service
public class StudentService
{
  ..
}

So once I startup my app I see that the studentService is null, but when I get the appcontext and invoke the method getBean("studentService") than a studentservice instance is returned. I use spring 3.0.5. Does anybody have a clue why the autowiring fails?

cheers,

Michael

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蓝戈者 2024-11-06 14:26:13

为什么不在测试类中也使用依赖注入呢？像这样的东西：

@RunWith(SpringJUnit4ClassRunner.class)
@ContextConfiguration(locations={"appcontext.xml"})
public final class JSONToDomainObjectsTests {
    private StudentService service;

    @Autowired
    public void setService(StudentService service) {
        this.service= service;
    }

    @Test
    public void testJSONToDomain() {
        service.foo();
    }
}

Why don't you use dependency injection in your testclasses as well? Something like this:

@RunWith(SpringJUnit4ClassRunner.class)
@ContextConfiguration(locations={"appcontext.xml"})
public final class JSONToDomainObjectsTests {
    private StudentService service;

    @Autowired
    public void setService(StudentService service) {
        this.service= service;
    }

    @Test
    public void testJSONToDomain() {
        service.foo();
    }
}

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