搜索功能没有做任何事情

时间:2013-11-19 19:19:18

标签: jsf search jpa derby

抱歉,如果这是一个糟糕的问题,但这一个功能让我疯了几天,所以我想在这里发帖,看看你们是否可以帮助我

基本上所有我想从jsf页面做的都有用户搜索用户并让我返回所有细节

<h:form id="searchForm">
                    <h:outputLabel value="Search: " style="font-weight:bold" />
                    <h:inputText id="search" value="#{userdetailsController.search}" />   
                    <h:commandButton value="Search" action="index"/>

                </h:form>

这是jsf页面,工作正常

它调用我的userdetailsController类

@Named("userdetailsController")
@SessionScoped
public class UserdetailsController implements Serializable {

    private Userdetails current;
    private DataModel items = null;
    @EJB
    private Richard.beans.UserdetailsFacade ejbFacade;
    private PaginationHelper pagination;
    private int selectedItemIndex;
    private String search;

    public String getSearch() {
        System.out.println("inGetSearch");
        return search;
    }

    public void setSearch(String search) {
        this.search = search;
    }
......

一个contactsService类

@Stateless
public class ContactsService {
    // Add business logic below. (Right-click in editor and choose
    // "Insert Code > Add Business Method")

    @EJB
    private UserdetailsFacade cf;

    public List<Userdetails> searchByString(String string) {
        return cf.searchByString(string);
    }


    public List<Userdetails> getAllPersons() {
        return cf.findAll();
    }
}

AbstractFacade类

   /* trying out a search function */
    public List<T> searchByString(String string) {
        System.out.println("in SearchByString");
        return getEntityManager().createNamedQuery("Userdetails.findByUsername").setParameter("string", "%" + string + "%").getResultList();
    }

和带有我正在尝试搜索的查询的Userdetails类

 @NamedQuery(name = "Userdetails.findByUsername", query = "SELECT u FROM Userdetails u WHERE u.username = :username")})

目前只有getters和设置在Getsearch

中有效

我怎样才能完成这项工作,因为我已经花了好几天时间来完成这项功能并且仍然没有接近,抱歉这是我第一次参加此活动

谢谢你们

修改

会添加

public List<Userdetails> getAllPersons() {
    if (search == null) {
        return cs.getAllPersons();
    }
    return cs.searchByString(search);
}
在UserdetailsController中

就足够了吗?

1 个答案:

答案 0 :(得分:3)

您没有在此处调用任何操作:

<h:commandButton value="Search" action="index"/>

因此,它“不做任何事情”确实是合乎逻辑的。

您需要调用托管bean操作,该操作又执行所需的代码以从DB获取所需数据并分配给属性:

<h:commandButton value="Search" action="#{userdetailsController.submit}" />

内有UserdetailsController

private String search;
private List<UserDetail> items; // No need for DataModel here.
@EJB
private UserdetailsFacade ejbFacade;

public String submit() {
    items = ejbFacade.searchByString(search);
    return "index";
}

顺便说一句,你的整个ContactsService似乎毫无用处。

根据您在更新问题时尝试使用getter方法,请不要这样做。出于Why JSF calls getters multiple times

中提到的原因,您不应该使用getter方法调用DB