Question

我认为我的问题与我的Managed Bean构造函数没有出现被调用有关。也就是说，如果我在构造函数中放置断点，应用程序不会在断点处停止。

我获取标题但不是构造函数中添加的行。

这是我的代码：首先是xhtml：

<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<html xmlns="http://www.w3.org/1999/xhtml"
      xmlns:h="http://java.sun.com/jsf/html"
      xmlns:f="http://java.sun.com/jsf/core"
      xmlns:ui="http://java.sun.com/jsf/facelets"
      xmlns:p="http://primefaces.org/ui">

    <f:view contentType="text/html">
        <h:head>
            <f:facet name="first">
                <meta content='text/html; charset=UTF-8' http-equiv="Content-Type"/>
                <title>LOTTO CHECKER</title>
            </f:facet>
        </h:head>

        <h:body>

            <p:layout fullPage="true">

                <p:layoutUnit position="north" size="100" resizable="true" closable="true" collapsible="true">
                    LOTTO CHECKER
                </p:layoutUnit>

                <p:layoutUnit position="south" size="100" closable="true" collapsible="true">
                    Footer
                </p:layoutUnit>

                <p:layoutUnit position="west" size="175" header="Left" collapsible="true" >

                </p:layoutUnit>

                <p:layoutUnit position="center">
                    <h:form id="powerBallDrawingForm">
                        <p:dataTable  value="#(lottoCheckerBean.powerBallDrawings}" var="powerBallDrawing"   >
                            <p:column headerText="DATE">

                                <h:outputText  value ="#{powerBallDrawing.drawingDate}"/>
                            </p:column >
                            <p:column headerText="BALL 1">

                                <h:outputText value="#{powerBallDrawing.ball_1}" />
                            </p:column>                 
                            <p:column headerText ="BALL 2"> 

                                <h:outputText value="#{powerBallDrawing.ball_2}" />
                            </p:column>    
                            <p:column headerText ="BALL 3">

                                <h:outputText value="#{powerBallDrawing.ball_3}" />
                            </p:column>    
                            <p:column headerText ="BALL 4">

                                <h:outputText value="#{powerBallDrawing.ball_4}" />
                            </p:column>    
                            <p:column headerText="BALL 5">

                                <h:outputText value="#{powerBallDrawing.ball_5}" />
                            </p:column>    
                            <p:column headerText="POWER BALL">

                                <h:outputText value="#{powerBallDrawing.powerBall}" />
                            </p:column>    
                        </p:dataTable>
                    </h:form>
                </p:layoutUnit>

            </p:layout>

        </h:body>

    </f:view>
</html>

现在是托管Bean

package PowerBall_BigBame_Checker;

import java.io.Serializable;

import java.util.ArrayList;
import java.util.List;
import javax.faces.bean.ManagedBean;
import javax.faces.bean.SessionScoped;


@ManagedBean
@SessionScoped

public class LottoCheckerBean  implements Serializable {

    // Add business logic below. (Right-click in editor and choose
    // "Insert Code > Add Business Method")


    private List<PowerBallDrawing> powerBallDrawings; 

    public LottoCheckerBean()  {

       powerBallDrawings = new ArrayList<PowerBallDrawing>();
       powerBallDrawings.add( new PowerBallDrawing("03/16/2013",1,2,3,4,5,6));

    }







    public List<PowerBallDrawing> getPowerBallDrawings() {
        return this.powerBallDrawings;
    }

    public void setPowerBallDrawings(List<PowerBallDrawing> powerBallDrawings) {
        this.powerBallDrawings = powerBallDrawings;
    }


}

最后是包含表格行的类：

package PowerBall_BigBame_Checker;

import java.io.Serializable;


public class PowerBallDrawing implements Serializable {

    private String drawingDate;
    private int ball_1;
    private int ball_2;
    private int ball_3;
    private int ball_4;
    private int ball_5;
    private int powerBall;

    public PowerBallDrawing(String drawingDate, int ball_1, int ball_2, int ball_3,
            int ball_4, int ball_5, int powerBall) {

        this.ball_1 = ball_1;
        this.ball_2 = ball_2;
        this.ball_3 = ball_3;
        this.ball_4 = ball_4;
        this.ball_5 = ball_5;
        this.powerBall = powerBall;
        this.drawingDate = drawingDate;




    }

    public String getDrawingDate() {
        return drawingDate;
    }

    public void setDrawingDate(String drawingDate) {
        this.drawingDate = drawingDate;
    }

    public int getBall_1() {
        return ball_1;
    }

    public void setBall_1(int ball_1) {
        this.ball_1 = ball_1;
    }

    public int getBall_2() {
        return ball_2;
    }

    public void setBall_2(int ball_2) {
        this.ball_2 = ball_2;
    }

    public int getBall_3() {
        return ball_3;
    }

    public void setBall_3(int ball_3) {
        this.ball_3 = ball_3;
    }

    public int getBall_4() {
        return ball_4;
    }

    public void setBall_4(int ball_4) {
        this.ball_4 = ball_4;
    }

    public int getBall_5() {
        return ball_5;
    }

    public void setBall_5(int ball_5) {
        this.ball_5 = ball_5;
    }

    public int getPowerBall() {
        return powerBall;
    }

    public void setPowerBall(int powerBall) {
        this.powerBall = powerBall;
    }
}

我怀疑我在某个地方违反了一项惯例，但我没有看到它。

Answer 1

您在构造函数中编写的代码应位于以下方法中：

public void setPowerBallDrawings（List powerBallDrawings）{

}

这是因为无论何时尝试访问变量，都会调用相应的setter方法。

尝试一次。它应该工作。

Answer 2

我已将您的类和jsf页面添加到现有项目中以查看错误。

你唯一的错误是在这一行

<p:dataTable  value="#(lottoCheckerBean.powerBallDrawings}" var="powerBallDrawing">

如评论中所述，您的EL表达中有（。正确的定义是

<p:dataTable  value="#{lottoCheckerBean.powerBallDrawings}" var="powerBallDrawing">

除此之外没有任何错误。

我很难将PrimeFaces数据表映射到我的Managed Bean

2 个答案: