拥有myfaces数据表,每条记录可能有2个行吗? 我的简单单行表如下所示:
<h:dataTable id="somelist" value="#{MyBean.somelist}" var="item">
<h:column>
<f:facet name="header">
<h:outputText value="ID"/>
</f:facet>
<h:outputText value="#{item.id}"/>
</h:column>
</h:dataTable>
答案 0 :(得分:1)
是的,在这种情况下。您可以通过自定义DataModel控制绑定到 outputText 的值。
public class TwoRowModel extends DataModel {
private List<Pair> values = initData();
private int index = -1;
private List<Pair> initData() {
List<Pair> list = new ArrayList<Pair>();
for (int i = 0; i < 5; i++) {
Pair pair = new Pair();
pair.key = "Key " + i;
pair.value = "Value " + i;
list.add(pair);
}
return list;
}
@Override
public int getRowCount() {
return values.size() * 2;
}
@Override
public Object getRowData() {
Pair pair = values.get(index / 2);
if (index % 2 == 0) {
return pair.key;
} else {
return pair.value;
}
}
@Override
public int getRowIndex() {
return index;
}
@Override
public Object getWrappedData() {
throw new UnsupportedOperationException("Demo code");
}
@Override
public boolean isRowAvailable() {
int realIndex = index / 2;
if (realIndex < 0) {
return false;
}
if (realIndex >= values.size()) {
return false;
}
return true;
}
@Override
public void setRowIndex(int idx) {
this.index = idx;
}
@Override
public void setWrappedData(Object value) {
throw new UnsupportedOperationException("Demo code");
}
class Pair {
public String key;
public String value;
}
}
在此演示代码中,返回的值只是要显示的值:
<h:dataTable id="somelist" value="#{twoRowModel}" var="item">
<h:column>
<f:facet name="header">
<h:outputText value="ID" />
</f:facet>
<h:outputText value="#{item}" />
</h:column>
</h:dataTable>