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java – Beim Schreiben von Paging im SSH-Framework kann die Paging-Klasse nicht in die Serviceschicht eingefügt werden
阿神
阿神 2017-06-12 09:24:51
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Serviceschicht

@Service
public class AuthorAdminServiceImpl implements IAuthorAdminService {
    @Resource
    private IAuthorAdminDao iauthoradmindao;
    @Resource
    PageUntil<AuthorAdmin> pageUntil;
@Override
    public PageUntil<AuthorAdmin> findByPage(int currentPage) {
        pageUntil.setCurrentPage(currentPage);// 當(dāng)前多少頁
        int pageSize = 3;
        pageUntil.setPagesize(pageSize);// 最多顯示多少記錄
        int totalCount = iauthoradmindao.findCount();// 數(shù)據(jù)庫中所有的記錄
        pageUntil.setTotalCount(totalCount);
        double tc = totalCount;
        Double num = Math.ceil(tc / pageSize);// 頁面顯示的總頁數(shù)=數(shù)據(jù)庫的總記錄數(shù)/最多顯示多少記錄
        pageUntil.setTotalPage(num.intValue());
        int begin = (currentPage - 1) * pageSize;// 當(dāng)前頁開頭位置的索引
        List<AuthorAdmin> list = iauthoradmindao.findByPage(begin, pageSize);
        if(list==null){
            System.out.println("list findByPage service error");}
        pageUntil.setList(list);
        
        return  pageUntil;
    }

Aktionsschicht

public String listAuthorAdmin() {
        PageUntil<AuthorAdmin> pageuntil = iauthoradminservice
                .findByPage(currentPage);
        ActionContext.getContext().getValueStack().push(pageuntil);
        return "listSuccess";
    }

org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'authorAdminAction': Injection of resource dependencies failed; nested exception is org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'authorAdminServiceImpl': Injection of autowired dependencies failed; nested exception is org.springframework.beans.factory.BeanCreationException: Could not autowire field: com.lcy.until.PageUntil com.lcy.service.author.admin.AuthorAdminServiceImpl.pageUntil; nested exception is org.springframework.beans.factory.NoSuchBeanDefinitionException: No matching bean of type [com.lcy.until.PageUntil] found for dependency: expected at least 1 bean which qualifies as autowire candidate for this dependency. Dependency annotations: {@org.springframework.beans.factory.annotation.Autowired(required=true)}


----------
Caused by: org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'authorAdminServiceImpl': Injection of autowired dependencies failed; nested exception is org.springframework.beans.factory.BeanCreationException: Could not autowire field: com.lcy.until.PageUntil com.lcy.service.author.admin.AuthorAdminServiceImpl.pageUntil; nested exception is org.springframework.beans.factory.NoSuchBeanDefinitionException: No matching bean of type [com.lcy.until.PageUntil] found for dependency: expected at least 1 bean which qualifies as autowire candidate for this dependency. Dependency annotations: {@org.springframework.beans.factory.annotation.Autowired(required=true)}


----------
Caused by: org.springframework.beans.factory.BeanCreationException: Could not autowire field: com.lcy.until.PageUntil com.lcy.service.author.admin.AuthorAdminServiceImpl.pageUntil; nested exception is org.springframework.beans.factory.NoSuchBeanDefinitionException: No matching bean of type [com.lcy.until.PageUntil] found for dependency: expected at least 1 bean which qualifies as autowire candidate for this dependency. Dependency annotations: {@org.springframework.beans.factory.annotation.Autowired(required=true)}


----------
Caused by: org.springframework.beans.factory.NoSuchBeanDefinitionException: No matching bean of type [com.lcy.until.PageUntil] found for dependency: expected at least 1 bean which qualifies as autowire candidate for this dependency. Dependency annotations: {@org.springframework.beans.factory.annotation.Autowired(required=true)}


Wenn es anstelle der Injektion ausreicht, die neue Methode anzuwenden, warum?

阿神
阿神

閉關(guān)修行中......

Antworte allen(3)
世界只因有你

PageUntil這個類也是要用@Component

黃舟

你沒有正確使用@Resource,導(dǎo)致配置文件里面找不到名稱屬性為"iauthoradmindao"的<bean>,故而注入失敗!你可以將@Resource 更換成 @AutoWired 試試看。這兩個注解的注入方式是不一樣的,當(dāng)然前提是你的xml文件中要配有"IAuthorAdminDao "類型的<bean>

詳情參考:https://www.zhihu.com/questio...

phpcn_u1582

我覺得 new出來最簡單了。你這個類需要考慮到特殊的問題嗎?

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