Spring Autowire失败,没有为依赖性错误找到类型的限定bean

Question

这是我的情景.我的项目使用Spring(3.2.3.RELEASE),Struts2(2.3.14.3)和JPA(2.0).我们有一个项目(我们称之为项目A),它包含各种实体和公共类.我们使用项目A生成.jar文件,以便其他项目可以使用这些类.在项目A中,我们使用了Spring构造型:@Component.我们希望Spring注入的那些类的@Service或@Repository.每当我们尝试从jar中注入bean时,都会出现类似于以下内容的错误:

1. 没有找到[com.ceiwc.bc.commonsql.service.CommonSQLService]类型的限定bean用于依赖:预期至少有1个bean符合此依赖关系的autowire候选者.依赖注释:{@ org.springframework.beans.factory.annotation.Autowired(required = true)}

2. 无法自动装配字段:private com.ceiwc.bc.commonsql.service.CommonSQLService com.ceiwc.ma.mvc.action.LoginAction.commonSQLService; 嵌套异常是org.springframework.beans.factory.NoSuchBeanDefinitionException:找不到[com.ceiwc.bc.commonsql.service.CommonSQLService]类型的限定bean用于依赖:预期至少有1个bean符合此依赖关系的autowire候选者.依赖注释:{@ org.springframework.beans.factory.annotation.Autowired(required = true)}

3. 创建名为"com.ceiwc.ma.mvc.action.LoginAction"的bean时出错:注入自动连接的依赖项失败; 嵌套异常是org.springframework.beans.factory.BeanCreationException:无法自动装配字段:private com.ceiwc.bc.commonsql.service.CommonSQLService com.ceiwc.ma.mvc.action.LoginAction.commonSQLService; 嵌套异常是org.springframework.beans.factory.NoSuchBeanDefinitionException:找不到[com.ceiwc.bc.commonsql.service.CommonSQLService]类型的限定bean用于依赖:预期至少有1个bean符合此依赖关系的autowire候选者.依赖注释:{@ org.springframework.beans.factory.annotation.Autowired(required = true)}

4. 无法实例化动作,com.ceiwc.ma.mvc.action.LoginAction,为命名空间'/ Login'Error中的'doLogin'定义,创建名为'com.ceiwc.ma.mvc.action.LoginAction'的bean:注入自动装配依赖失败; 嵌套异常是org.springframework.beans.factory.BeanCreationException:无法自动装配字段:private com.ceiwc.bc.commonsql.service.CommonSQLService com.ceiwc.ma.mvc.action.LoginAction.commonSQLService; 嵌套异常是org.springframework.beans.factory.NoSuchBeanDefinitionException:找不到[com.ceiwc.bc.commonsql.service.CommonSQLService]类型的限定bean用于依赖:预期至少有1个bean符合此依赖关系的autowire候选者.依赖注释:{@ org.springframework.beans.factory.annotation.Autowired(required = true)}

我们正在使用Spring的Java配置.这是我们的配置类:

package com.zzz.bc.config;

@Configuration
@ImportResource({"/WEB-INF/spring/spring-config.xml"})
@ComponentScan(basePackages = "com.zzz")
public class ApplicationConfig {
    @Bean
    public JavaMailSender mailSender() {
        JavaMailSenderImpl mailSender = new JavaMailSenderImpl();
        mailSender.setHost(${app.mail.host});
        return mailSender;
    }
}

package com.zzz.bc.config;

@Configuration
@EnableTransactionManagement
@Import(ApplicationConfig.class)
@PropertySource({"classpath:db.properties"})
public class DataConfig {

    @Autowired
    Environment environment;

    @Bean
    public PlatformTransactionManager transactionManager() {
        JpaTransactionManager transactionManager = new JpaTransactionManager();
        transactionManager.setEntityManagerFactory(entityManagerFactoryBean().getObject());
        return transactionManager;
    }

    @Bean
    public LocalContainerEntityManagerFactoryBean entityManagerFactoryBean() {
        String[] packagesToScan =
                {environment.getProperty("db.packagesToScan1"), environment.getProperty("db.packagesToScan2")};

        Map<String, Object> jpaProperties = new HashMap<String, Object>();
        jpaProperties.put("eclipselink.weaving", "false");

        LocalContainerEntityManagerFactoryBean entityManagerFactoryBean = new LocalContainerEntityManagerFactoryBean();
        entityManagerFactoryBean.setDataSource(dataSource());
        entityManagerFactoryBean.setPackagesToScan(packagesToScan);
        entityManagerFactoryBean.setLoadTimeWeaver(new InstrumentationLoadTimeWeaver());
        entityManagerFactoryBean.setJpaVendorAdapter(vendorAdapter());
        entityManagerFactoryBean.setJpaPropertyMap(jpaProperties);

        return entityManagerFactoryBean;
    }

    @Bean
    public DriverManagerDataSource dataSource() {
        DriverManagerDataSource dataSource = new DriverManagerDataSource();
        dataSource.setDriverClassName(environment.getProperty("db.driver"));
        dataSource.setUrl(environment.getProperty("db.url"));
        dataSource.setUsername(environment.getProperty("db.username"));
        dataSource.setPassword(environment.getProperty("db.password"));
        return dataSource;
    }

    @Bean
    public JpaVendorAdapter vendorAdapter() {
        EclipseLinkJpaVendorAdapter vendorAdapter = new EclipseLinkJpaVendorAdapter();
        vendorAdapter.setDatabase(Database.ORACLE);
        vendorAdapter.setShowSql(true);
        return vendorAdapter;
    }

    @Bean
    public PersistenceExceptionTranslationPostProcessor exceptionTranslation() {
        return new PersistenceExceptionTranslationPostProcessor();
    }
}

我们将@ComponentScan设置为在com.zzz包中检查bean.在项目B中,我们有一个Struts2 Action,我们想从项目A中注入一个bean.这是项目B中类的一个片段:

@SuppressWarnings("rawtypes")
@Service("CommonSQLService")
public class CommonSQLServiceImpl implements CommonSQLService {

    @Autowired
    CommonSQLDao cdao;

    @Override
    public Policy getPolicyById(String policyNo) {
        return cdao.getPolicyById(policyNo);
    }

    @Override
    public Policy getPolicy(Policy parmRec) {
        return cdao.getPolicy(parmRec);
    }

    @Override
    public ArrayList<Policy> getPolicies(String policyNo) {
        return cdao.getPolicies(policyNo);
    }
    @Override
     public List<Policy> getPolicies(Policy parmRec){
        return cdao.getPolicies(parmRec);
    }
}

这是我们的行动(删除了getters/setters):

package com.zzz.ma.mvc.action;

@SuppressWarnings("serial")
@Component
@Scope("prototype")
@Namespace("/Login")
public class LoginAction extends ActionParent {
    @Autowired
    private IUserService userService; //Contained in project B

    @Autowired
    private CommonSQLService commonSQLService; //What's autowired from project A

    private User user;
    private String updateFlag;
    private Integer parentMenuId;
    private IwifWebNavmenuItem record;

    public static final String LOGIN_STR = "login";

    @Action(value = "doLogin", results = { @Result(name = "success", location = "/pages/login.jsp") })
    public String login() {
        updateFlag = "Y";
        return SUCCESS;
    }

    @Action(value = "validate", results = {
            @Result(name = "success", location = "/BrowseOptions/showOptions", type = "redirect"),
            @Result(name = "login", location = "/pages/login.jsp") })
    public String validateUser() {
        if (updateFlag == null) {
            session.remove(LOGIN_STR);
            return LOGIN;
        }

        if (userService.validateUser(user.getUsername(), user.getPassword()) == null) {
            addActionError(getText("invalid.user"));
            return LOGIN;
        }

        session.put(LOGIN_STR, user.getUsername());

        return SUCCESS;
    }

    @Action(value = "logout", results = { @Result(name = "success", location = "/pages/login.jsp") })
    public String logout() {
        updateFlag = StringUtils.EMPTY;
        session.invalidate();

        return SUCCESS;
    }
}

每当我们尝试执行此自动装配时,我们会收到类似上面列出的错误.我们缺少什么？使用Spring Stereotypes的jar文件中包含的类不能自动装配吗？

感谢您提前帮助!

Answer 1

如果您没有在其他地方实现接口,请更改@Service("CommonSQLService")为@Service("commonSQLService")或者您可以使用.@ServiceCommonSQLService