-1

我得到了以下 JSF 构造：

索引.xhtml：

<h:form>
    <h:commandButton class="btn btn-success pull-left left-puffer right-puffer" value="Test" action="#{bean.debugCode()}" />
</h:form>

bean.java => 用于视图和 DataBaseController 之间的 bean

package db_container;
import javax.faces.bean.ManagedBean;
import javax.faces.bean.SessionScoped;

@ManagedBean(name = "bean")
@SessionScoped

public class Bean {
/*
 * VARIABLES
 */
// Database
private DataBaseController xy = null;

/*
 * CONSTRUCTOR
 */
public Bean() throws Exception {
    this.xy = new DataBaseController();     
}

/*
 * METHODS
 */

public void debugCode() {
    xy.DebugtoDB("DEBUG", "hallo", "welt", "neu");
 }
}

堆栈跟踪：

WARNING: #{bean.debugCode()}:
javax.el.MethodNotFoundException: /index.xhtml @330,139 action="
{bean.debugCode}": Method not found:
db_container.Bean@fda7ea.debugCode()
javax.faces.FacesException: #{bean.debugCode()}: javax.el.MethodNotFoundException: /index.xhtml @330,139 action="#{bean.debugCode}": Method not found: db_container.DetailsManager@fda7ea.debugCode()
at com.sun.faces.application.ActionListenerImpl.processAction(ActionListenerImpl.java:110)
at javax.faces.component.UICommand.broadcast(UICommand.java:315)
at javax.faces.component.UIViewRoot.broadcastEvents(UIViewRoot.java:790)
at javax.faces.component.UIViewRoot.processApplication(UIViewRoot.java:1282)
at com.sun.faces.lifecycle.InvokeApplicationPhase.execute(InvokeApplicationPhase.java:81)
at com.sun.faces.lifecycle.Phase.doPhase(Phase.java:101)
at com.sun.faces.lifecycle.LifecycleImpl.execute(LifecycleImpl.java:118)
at javax.faces.webapp.FacesServlet.service(FacesServlet.java:646)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:231)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166)
at org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:53)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166)
at net.sourceforge.spnego.SpnegoHttpFilter.doFilter(SpnegoHttpFilter.java:318)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166)
at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:199)
at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:96)
at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:491)
at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:139)
at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:92)
at org.apache.catalina.valves.AbstractAccessLogValve.invoke(AbstractAccessLogValve.java:668)
at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:87)
at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:343)
at org.apache.coyote.http11.Http11Processor.service(Http11Processor.java:408)
at org.apache.coyote.AbstractProcessorLight.process(AbstractProcessorLight.java:66)
at org.apache.coyote.AbstractProtocol$ConnectionHandler.process(AbstractProtocol.java:764)
at org.apache.tomcat.util.net.NioEndpoint$SocketProcessor.doRun(NioEndpoint.java:1388)
at org.apache.tomcat.util.net.SocketProcessorBase.run(SocketProcessorBase.java:49)
at java.util.concurrent.ThreadPoolExecutor.runWorker(Unknown Source)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(Unknown Source)
at org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskThread.java:61)
at java.lang.Thread.run(Unknown Source)

现在，当我启动视图并单击按钮时，会出现异常。不幸的是，这对我来说似乎不合逻辑，因为 bean 中有准备调用的函数。

我究竟做错了什么？

4

1 回答 1

1

您的方法需要一个布尔值：

public void debugCode(Boolean test) {
    xy.DebugtoDB("DEBUG", "hallo", "welt", "neu");
 }

在这种情况下，您的 xhtml 中的方法调用必须实际传递一个true或false这样的值：

<h:form>
    <h:commandButton class="btn btn-success pull-left left-puffer right-puffer" value="Test" action="#{bean.debugCode(true)}" />
</h:form>
于 2018-07-31T09:25:06.693 回答