小编Roz*_*art的帖子

鉴于此代码:

public interface Service {}

@Component
@Qualifier("NotWanted")
public class NotWantedService implements Service {}

@Component
@Qualifier("Wanted")
public class WantedService implements Service {}

AnnotationConfigApplicationContext ctx = new AnnotationConfigApplicationContext();
ctx.register(NotWantedService.class);
ctx.register(WantedService.class);
ctx.refresh()

我现在该怎么做:

ctx.getBean(Service.class)

在一种方式,只会得到一个@Qualifier("Wanted")而不是一个@Qualifier("NotWanted")？我特别询问是否有可能使用它getBean,而不是注入一个类,然后使用那个作为一种代理.

我遇到了问题p:dataTable并排除了单行选择中的列.

我的dataTable中有4列.显示fileId,fileName和uploadDate需要前3个.在第4列中,每行都有一个命令按钮,用于启动文件处理操作.但是也有行选择(在事件上使用ajax操作)导航到文件详细信息页面.现在,当我点击行上的任何位置(包括按钮)时,它会导航到详细信息页面.

这是我目前的代码:

<h:form>
    <p:dataTable id="billingFiles" value="#{billingFiles}"
        var="billingFile"
        rowKey="#{billingFile.billingFile.idBillingFile}"
        filteredValue="#{billingService.filteredBillingFileDataModels}"
        selectionMode="single" paginator="true" rows="10">

        <p:ajax event="rowSelect" listener="#{billingService.selectBillingFileRow}" />

        <p:column sortBy="#{billingFile.id}"
            filterBy="#{billingFile.id}" id="idFile"
            headerText="#{msg['billing.file.id']}"
            filterMatchMode="contains">
            <h:outputText value="#{billingFile.id}" />
        </p:column>

        <p:column sortBy="#{billingFile.uploadDate}"
            filterBy="#{billingFile.uploadDate}" id="uploadDate"
            headerText="#{msg['billing.file.upload_date']}"
            filterMatchMode="contains">
            <h:outputText value="#{billingFile.uploadDate}" />
        </p:column>

        <p:column sortBy="#{billingFile.fileName}"
            filterBy="#{billingFile.fileName}" id="fileName"
            headerText="#{msg['billing.file.file_name']}"
            filterMatchMode="contains">
            <h:outputText value="#{billingFile.fileName}" />
        </p:column>

        <p:column id="loadBillingFile">
            <p:commandButton id="loadBillingFileButton"
                rendered="#{billingFile.fileStatus.equals('UPLOADED')}"
                value="#{msg['billing.load_billing_file']}"
                action="#{billingService.loadBillingFile(billingFile.billingFile)}"
                update=":form" />
        </p:column>
    </p:dataTable>
</h:form>

并且有导航到文件详细信息页面的方法:

public void selectBillingFileRow(SelectEvent event) {
    BillingFileDataModel billingFileDataModel = (BillingFileDataModel) event.getObject();
    if (billingFileDataModel != null) {
        selectedBillingFile = billingFileDAO.findBillingFileById(billingFileDataModel.getBillingFile().getIdBillingFile()); …

我在运行示例Spring Boot Application时遇到问题.当我尝试运行它时,会发生以下错误:

 java.net.BindException: Address already in use: bind
            at sun.nio.ch.Net.bind0(Native Method)
            at sun.nio.ch.Net.bind(Unknown Source)
            at sun.nio.ch.Net.bind(Unknown Source)
            at sun.nio.ch.ServerSocketChannelImpl.bind(Unknown Source)
            at sun.nio.ch.ServerSocketAdaptor.bind(Unknown Source)
            at org.apache.tomcat.util.net.NioEndpoint.bind(NioEndpoint.java:473)
o.apache.catalina.core.StandardService   : Failed to initialize connector [Connector[org.apache.coyote.http11.Http11NioProtocol-8080]]

    org.apache.catalina.LifecycleException: Failed to initialize component [Connector[org.apache.coyote.http11.Http11NioProtocol-8080]]
            at org.apache.catalina.util.LifecycleBase.init(LifecycleBase.java:106)
            at org.apache.catalina.core.StandardService.initInternal(StandardService.java:559)
            at org.apache.catalina.util.LifecycleBase.init(LifecycleBase.java:102)
            at org.apache.catalina.core.StandardServer.initInternal(StandardServer.java:814)
            at org.apache.catalina.util.LifecycleBase.init(LifecycleBase.java:102)
            at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:139)
            at org.apache.catalina.startup.Tomcat.start(Tomcat.java:335)
            at org.springframework.boot.context.embedded.tomcat.TomcatEmbeddedServletContainer.initialize(TomcatEmbeddedServletContainer.java:57)
            at org.springframework.boot.context.embedded.tomcat.TomcatEmbeddedServletContainer.<init>(TomcatEmbeddedServletContainer.java:52)
            at