构建具有不同列数的html表

Question

我使用Java和icefaces，我需要构建一个表，每次将有不同数量的列。

到目前为止，我找到的最好的例子是在icefaces网站上

我试图让列的数量是动态的，但我不知道如何在html页面中获得单元格值。下面是我的代码:

My bean:

public class DynamicColumnsBean implements Serializable {
int randomRows ;
int randomCol ;
List<Task> data;   // rows data
List<ColumnModel> columns ;

public DynamicColumnsBean() {
    super();
    Random rn = new Random();
    randomRows = rn.nextInt() % 40;
    randomCol = rn.nextInt() % 30;
    if(randomRows==0)   randomRows=10;
    if(randomCol==0)    randomCol=7;
    if(randomRows<0)    randomRows*=-1;
    if(randomCol<0)     randomCol*=-1;
     columns = new ArrayList<ColumnModel>();
     for (int i=0 ; i< randomCol ; i++ )
    {
         columns.add(new ColumnModel(i, "ID "+ i +" "));
    }
    data = new ArrayList<Task>() ; //row objects
    for (int i=0 ; i< randomRows ; i++ )
    {
        List<String> obj = new ArrayList<String>() ;
        for (int j=0 ; j< randomCol ; j++ )
        {
            obj.add("row "+i +" col "+j);
        }
        Task temp = new Task(obj);
        data.add(temp);
    }
}

    public List<Task> getData() 
    {           return data;        }
    public void setData(ArrayList<Task> data) 
    {           this.data = data;       }
    public List<ColumnModel> getColumns() {
        return columns;     }
    public void setColumns(ArrayList<ColumnModel> columns) {
        this.columns = columns;     }
}

public class Task {
List<String> obj ;

 public Task() {
        super();
    } 
public Task(List<String> obj) {
    super();
    obj = new ArrayList<String>();
    this.obj = obj;
}
public List<String> getObj() {
    return obj; }
public void setObj(List<String> obj) {
    this.obj = obj; }
}
public class ColumnModel {
int value; // represents sortBy / filterBy as one field
String headerText;
public ColumnModel(int i, String headerText) {
    this.value = i;
    this.headerText = headerText;
}
public int getValue() {
    return value;    }
public void setValue(int value) {
    this.value = value;    }
public String getHeaderText() {
    return headerText;    }
public void setHeaderText(String headerText) {
    this.headerText = headerText;    }
}

<ace:dataTable value="#{dynBean2.data}" var="row" scrollable="true"
              height="200"     paginator="true"   rows="5" >
            <c:forEach items="#{dynBean2.columns}" var="col">
                <ace:column headerText="#{col.headerText}" style="width: 40px" >
                    <ice:outputText value=" #{row['obj'[col.value]]}"></ice:outputText>
                </ace:column>
            </c:forEach>
        </ace:dataTable>

我的问题是:

ice:outputText value=" #{row['obj'[col.value]]}"

我需要的值是:获取索引I中的数据->获取索引[col.value]中的obj中的值

Answer 1

您可以尝试使用varStatus:

<c:forEach items="#{dynBean2.columns}" var="col" varStatus="colStatus">
  <ace:column headerText="#{col.headerText}" style="width: 40px" >
    <ice:outputText value=" #{row.obj[colStatus.index]}"></ice:outputText>
  </ace:column>
</c:forEach>