Question

我有以下问题！

在我的一个网站上，我有一个按钮：

<h:commandButton value="IDA Analyzer Results" action="#{SelectionBean.monitoringLog()}"/>

它调用bean的某些部分的方法：

@ManagedBean(name = "SelectionBean")
@SessionScoped
public class TableSelectionBean {


private List<String> analyzerLog = new ArrayList<String>();


public String monitoringLog() throws FileNotFoundException, IOException{

String fileName = "/opt/IDA2/Linux/bin/"+"filtered_"+selectionMonitoringData.get(0).getMonitoringName()+"_result.txt";
if(selectionMonitoringData.get(0).getIsExecuted())
{
    BufferedReader br = new BufferedReader(new FileReader(fileName));
    try {   
        String line;
        while ((line=br.readLine()) != null) {
                getAnalyzerLog().add(line);

        }   

    } finally {
        br.close();
        System.out.println(getAnalyzerLog());
    }
}
return "analyzerresult.xhtml";
}

点击此按钮后，您可以看到它导航到另一页：

<h:body>
    <h:form>      
            <h:commandButton value="hi" action="#{AnalyzerBean.myMethod()}"></h:commandButton>       
    </h:form>
</h:body>

这是Bean：

@ManagedBean(name = "AnalyzerBean")
@SessionScoped
public class AnalyzerResultBean {

@ManagedProperty(value="#{SelectionBean.analyzerLog}")
private List<String> analyzerLog;


public void myMethod(){
    System.out.print(analyzerLog);
}
    /**
     * @return the analyzerLog
     */
    public List<String> getAnalyzerLog() {
        return analyzerLog;
    }

    /**
     * @param analyzerLog the analyzerLog to set
     */
    public void setAnalyzerLog(List<String> analyzerLog) {
        this.analyzerLog = analyzerLog;
    }

因此，当我尝试使用此Managed属性时，它会说：

表达式＃{SelectionBean.analyzerLog}，view引用的对象的范围比引用的托管bean（AnalyzerBean）会话范围短，但是您可以看到两者都是Session Scoped。可能是什么问题？

Answer 1

如果您使用JSF 2.x并且想要导航analyzeresult.xhtml页面返回analyzerresult

public String monitoringLog() throws FileNotFoundException, IOException{
  return "analyzerresult";
}

.xhtml扩展名不需要。

Session Scoped Managed Bean之间的托管属性

1 个答案: