Question

我是JSF的新手，所以我正在制作一个学习目的的项目。一切都工作正常，但当我尝试编辑记录时，我陷入了我的项目。

首先，我正在制作一个CRUD示例，为此我使用两页如下： -

publishers.xhtml - 从数据库显示发布者。它工作正常。
add_publisher.xhtml - 要添加和修改发布商，当我添加发布商时，它可以正常工作，但是当我编辑发布商时，它甚至不会调用该方法。

这是我的代码：

publishers.xhtml：

<h:dataTable
styleClass="table table-striped table-bordered table-hover"
value="#{publisherManager.publishers}" 
var="publisher"
id="dataTables-example">
    <h:column>
        <f:facet name="header">S.No.</f:facet>
        <h:outputText value="#{serialNumber.sn}"></h:outputText>
    </h:column>
    <h:column>
        <f:facet name="header">Name</f:facet>
        <h:outputText value="#{publisher.name}"></h:outputText>
    </h:column>
    <h:column>
        <f:facet name="header">Publish</f:facet>
        <h:outputText value="No"></h:outputText>
    </h:column>
    <h:column>
        <f:facet name="header">Acion</f:facet>
        <h:form>
            <h:commandLink action="add_publisher" id="edit_link">
                <img src="images/edit.png" width="20" />
                <f:setPropertyActionListener target="#{publisherManager.currentId}"
                    value="#{publisher.id}" />
                <f:setPropertyActionListener target="#{publisherManager.newName}"
                    value="#{publisher.name}" />
                <f:setPropertyActionListener target="#{publisherManager.newDescription}"
                    value="#{publisher.description}" />
                <f:setPropertyActionListener target="#{publisherManager.operation}"                         value="update" />
            </h:commandLink>
        </h:form>
        <h:form>
            <h:commandLink id="delete_link" action="publishers">
                <img src="images/delete.png" width="20" />
            </h:commandLink>
        </h:form>
    </h:column>
</h:dataTable>

add_publisher.xhtml：

<form method="post" jsf:name="publisher_form" action="">
    <div class="form-group">
        <label>Name</label>
        <h:inputText styleClass="form-control" id="name" value="#{publisherManager.newName}"></h:inputText>
    </div>
    <div class="form-group">
        <label>Description</label>
        <h:inputTextarea styleClass="form-control" rows="3" id="description" value="#{publisherManager.newDescription}"></h:inputTextarea>
    </div>
    <h:commandButton action="#{publisherManager.addPublisher}" value="Submit" styleClass="btn btn-default" />
    <input type="reset" name="sbmt" id="sbmt" value="Reset" class="btn btn-default"/> 
</form>

PublisherManager.java：

@ManagedBean
@RequestScoped
public class PublisherManager implements Serializable {
    private static final long serialVersionUID = 2142383151318489373L;
    @EJB
    private PublisherBean publisherBean;
    private static final Logger logger = Logger.getLogger("bookstore.web.PublisherManager");
    private List<Publisher> publishers;
    private String newName;
    private String newDescription;
    private Integer currentId;
    private String operation = "add";

    public String getOperation() {
        return operation;
    }
    public void setOperation(String operation) {
        this.operation = operation;
    }
    public String getNewName() {
        logger.log(Level.INFO,"Getname called");
        return newName;
    }
    public void setNewName(String newName) {
        logger.log(Level.INFO,"Setname called");
        this.newName = newName;
    }
    public String getNewDescription() {
        logger.log(Level.INFO,"GetDescription called");
        return newDescription;
    }
    public void setNewDescription(String newDescription) {
        logger.log(Level.INFO,"SetDescription called");
        this.newDescription = newDescription;
    }
    public Integer getCurrentId() {
        logger.log(Level.INFO,"getCurrentId called");
        return currentId;
    }
    public void setCurrentId(Integer currentId) {
        logger.log(Level.INFO,"setCurrentId called");
        this.currentId = currentId;
    }

    public List<Publisher> getPublishers(){
        try{
            this.publishers = publisherBean.getAllPublishers();
        }catch(Exception e){
            logger.warning("Can't get publishers");
        }
        return publishers;
    }
    public void addPublisher(){
        logger.log(Level.INFO,"addPublisher called");
        try{
            publisherBean.createPublisher(currentId, newName, newDescription, operation);
            logger.log(Level.INFO,"Publisher added successfully");
            this.currentId = null;
            this.newName = null;
            this.newDescription = null;
            FacesContext.getCurrentInstance().getExternalContext().redirect("publishers.xhtml");
        }catch(Exception e){
            e.printStackTrace();
            logger.warning("Problem when adding publisher");
        }
    }
}

PublisherBean.java：

@Stateful
public class PublisherBean {
    @PersistenceContext
    private EntityManager em;

    private static final Logger logger = Logger.getLogger("bookstore.ejb.RequestBean");

    public void createPublisher(Integer id,String name, String description, String operation){
        logger.log(Level.INFO,"createPublisher called");
        logger.log(Level.INFO,"operation = "+operation);
        if(operation.equals("add")){
            try{
                Publisher publisher = new Publisher(name, description);

                logger.log(Level.INFO, "Created Publisher {0}-{1}", new Object[]{name, description});
                em.persist(publisher);
                logger.log(Level.INFO, "Persisted Publisher {0}-{1}", new Object[]{name, description});
            }catch(Exception e){
                throw new EJBException(e.getMessage());
            }
        }
        if(operation.equals("update")){
            try{
                Publisher publisher = em.find(Publisher.class, id);
                publisher.setName(name);
                publisher.setDescription(description);
                em.merge(publisher); 
                logger.log(Level.INFO, "Updates Publisher {0}-{1}", new Object[]{name, description});
            }catch(Exception e){
                throw new EJBException(e.getMessage());
            }
        }

    }

    public List<Publisher> getAllPublishers(){
        List<Publisher> publishers = (List<Publisher>) em.createNamedQuery("Publisher.findAll").getResultList();
        return publishers;
    }

}

当我在添加或编辑时点击add_publisher.xhtml页面上的提交按钮时调用相同的方法，当我添加发布者方法调用并插入记录但是当我编辑产品时，相同的方法应该是但这次是为了编辑产品。但是PublisherManager.java的addPublisher（）方法不会调用。

请帮我弄清楚我的错误。

提前致谢...

commandButton动作不在JSF中调用bean方法

0 个答案: