Question

我有以下会话bean：

@Stateless
public class AuditDataRetriver {

    @PersistenceContext
    EntityManager em;
    public  String executeQuery() {  

....
}

和模型：

@Model
public class ChartBean implements Serializable {

    @Inject
    AuditDataRetriver dataRetriver;

    private CartesianChartModel linearModel;

    public ChartBean() {
        createLinearModel();
    }

    public CartesianChartModel getLinearModel() {
        return linearModel;
    }

     private void createLinearModel() {

    linearModel = new CartesianChartModel();       

    Map<String, List<StatisticsObj>> map = dataRetriver.executeQuery();

    for (Map.Entry<String, List<StatisticsObj>> entry : map.entrySet()) {
        String op = entry.getKey();

        LineChartSeries series = new LineChartSeries();
        series.setLabel(op);

        List<StatisticsObj> list = entry.getValue();

        for (StatisticsObj statisticsObj : list) {
            series.set(statisticsObj.datetime, statisticsObj.value);
        }
        linearModel.addSeries(series);

    }

}

....

}

因此，当你看到我在模型中注入会话bean时，我尝试通过

在JSF中使用该模型

<?xml version='1.0' encoding='UTF-8' ?>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml"
      xmlns:h="http://xmlns.jcp.org/jsf/html">
    <h:head>
        <title>Facelet Title</title>
    </h:head>
    <h:body>
        Hello from Facelets #{chartBean.linearModel}
    </h:body>
</html>

但访问JSF ==＆gt;

com.google.common.collect.ComputationException: java.lang.NullPointerException
    at com.google.common.collect.ComputingConcurrentHashMap$ComputingMapAdapter.get(ComputingConcurrentHashMap.java:400)
    at org.jboss.weld.bean.proxy.ClientProxyProvider.getClientProxy(ClientProxyProvider.java:163)
    at org.jboss.weld.el.AbstractWeldELResolver.lookup(AbstractWeldELResolver.java:115)
    at org.jboss.weld.el.AbstractWeldELResolver.getValue(AbstractWeldELResolver.java:96)
    at javax.el.CompositeELResolver.getValue(CompositeELResolver.java:188)
    at com.sun.faces.el.DemuxCompositeELResolver._getValue(DemuxCompositeELResolver.java:176)
    at com.sun.faces.el.DemuxCompositeELResolver.getValue(DemuxCompositeELResolver.java:203)
    at com.sun.el.parser.AstIdentifier.getValue(AstIdentifier.java:116)
    at com.sun.el.parser.AstValue.getBase(AstValue.java:151)
    at com.sun.el.parser.AstValue.getValue(AstValue.java:200)
    at com.sun.el.ValueExpressionImpl.getValue(ValueExpressionImpl.java:226)
    at org.jboss.weld.el.WeldValueExpression.getValue(WeldValueExpression.java:50)
    at com.sun.faces.facelets.el.TagValueExpression.getValue(TagValueExpression.java:109)
    at javax.faces.component.ComponentStateHelper.eval(ComponentStateHelper.java:194)

..... ..... .....

Caused by: java.lang.NullPointerException
    at sep.tools.ChartBean.createLinearModel(ChartBean.java:40)
    at sep.tools.ChartBean.<init>(ChartBean.java:27)
    at sep.tools.ChartBean$Proxy$_$$_WeldClientProxy.<init>(Unknown Source)
    at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)
    at sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:57)
    at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45)
    at java.lang.reflect.Constructor.newInstance(Constructor.java:526)
    at java.lang.Class.newInstance(Class.java:374)
    at org.jboss.weld.security.NewInstanceAction.run(NewInstanceAction.java:33)
    at java.security.AccessController.doPrivileged(Native Method)
    at org.jboss.weld.bean.proxy.ProxyFactory.create(ProxyFactory.java:262)
    at org.jboss.weld.bean.proxy.ClientProxyFactory.create(ClientProxyFactory.java:103)
    at org.jboss.weld.bean.proxy.ClientProxyProvider.createClientProxy(ClientProxyProvider.java:157)
    at org.jboss.weld.bean.proxy.ClientProxyProvider.createClientProxy(ClientProxyProvider.java:147)
    at org.jboss.weld.bean.proxy.ClientProxyProvider.access$000(ClientProxyProvider.java:49)
    at org.jboss.weld.bean.proxy.ClientProxyProvider$1.apply(ClientProxyProvider.java:57)
    at org.jboss.weld.bean.proxy.ClientProxyProvider$1.apply(ClientProxyProvider.java:53)

所以bean没有注入...... :(

感谢任何帮助

由于

@Inject会话bean进入@Model

0 个答案: