Question

我有这样的服务类：

@Service
public class ReminderServiceImpl implements ReminderService {

@Autowired
private RemindRepository repository;

public Remind save(Remind remind) {
    return repository.saveAndFlush(remind);
}

public List<Remind> getAll() {
    return repository.findAll();
}

}

从控制器可以正常工作：

@RestController
@RequestMapping("/api")
public class RemindController {

@Autowired
private ReminderService service;

@RequestMapping(value = "/remind", method = RequestMethod.GET, headers="Accept=application/json")
@ResponseBody
public List<Remind> getReminder() {
    return service.getAll();
}
}

但是从另一个类（例如Xml解析器），我得到service.save（r）的空指针异常：

@Component
public class XMLConverter implements ResourceLoaderAware {

@Autowired
private ReminderService service;

... 


public void convertFromXMLToObject() throws XmlPullParserException, IOException {

...
Remind r=new Remind();
r.setTitle(parser.getText());
service.save(r);

...

}

}

我的mvc-dispatcher-servlet.xml：

 <beans xmlns="http://www.springframework.org/schema/beans"
   xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
   xmlns:context="http://www.springframework.org/schema/context"
   xmlns:jpa="http://www.springframework.org/schema/data/jpa" xmlns:tx="http://www.springframework.org/schema/tx"
   xmlns:mvc="http://www.springframework.org/schema/mvc"
   xsi:schemaLocation="http://www.springframework.org/schema/beans
    http://www.springframework.org/schema/beans/spring-beans.xsd
    http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context.xsd http://www.springframework.org/schema/data/jpa http://www.springframework.org/schema/data/jpa/spring-jpa.xsd http://www.springframework.org/schema/tx http://www.springframework.org/schema/tx/spring-tx.xsd http://www.springframework.org/schema/mvc http://www.springframework.org/schema/mvc/spring-mvc.xsd">


<context:component-scan base-package="server"/>

<bean class="org.springframework.web.servlet.view.InternalResourceViewResolver">
    <property name="prefix" value="/WEB-INF/"/>
    <property name="suffix" value=".jsp"/>
</bean>

<jpa:repositories base-package="server.repository"/>

<bean id="entityManagerFactory" class="org.springframework.orm.jpa.LocalEntityManagerFactoryBean">
    <property name="persistenceUnitName" value="myprovider"/>
</bean>

<tx:annotation-driven transaction-manager="transactionManager"/>

<bean id="transactionManager" class="org.springframework.transaction.jta.JtaTransactionManager">
    <property name="transactionManagerName" value="java:jboss/TransactionManager"/>
</bean>

我做错了什么？

Answer 1

哪个包是XMLConverter类？如果它不在基础包“server”之下，则@Autowired注释将不起作用，因为不会扫描anotations。

为什么我的Spring @Autowired字段在非控制器的类中？

1 个答案: