我在rich: datatable中有h:selectBooleanCheckBox列表。此外，还有数据表分页。
问题是当我单击下一个页码时，数据表第一页上所选的复选框消失了。虽然它们已被选中，但单击下一页/上一页将使它们被取消选中。
你知道是什么问题吗?
这些是bean的注释。
@ManagedBean(name = "bean")
@ViewScoped
为了澄清它，我在下面附上了我的facelets和bean代码:
<rich:dataTable value="#{bean.ssTable}" var="data" iterationStatusVar="it" id="myDataTable">
...
<rich:column id="includeInWHMapping" >
<f:facet name="header">
<h:selectBooleanCheckbox value="#{bean.selectAll}" valueChangeListener="#{bean.selectAllCheckBox}">
<f:ajax render="myDataTable" />
</h:selectBooleanCheckbox>
</f:facet>
<h:selectBooleanCheckbox id="selectedForWHProcess" value="#{bean.checked[data]}">
<f:ajax actionListener="#{bean.selectAllRows}" />
</h:selectBooleanCheckbox>
</rich:column>
...
</rich:dataTable>
Bean代码:
private Map<StandardStructure, Boolean> checked = new HashMap<StandardStructure, Boolean>();
private boolean selectAll;
/* Controller */
public MyController() {
super(new DataSetParameters());
logger.info("StandardStructureController created.");
Column rowid_col =new Column("rowid", "rowid", "No.", FilterTypes.NUMERIC, true, true, "");
Column fileid_col =new Column("fileid", "fileid", "File ID", FilterTypes.STRING, true, true, "");
Column releasetag_col =new Column("releasetag", "releasetag", "Releasetag ID", FilterTypes.STRING, true, true, "");
Column applicationid_col =new Column("applicationid", "applicationid", "Application ID", FilterTypes.STRING, true, true, "");
Column filename_col =new Column("filename", "filename", "Filename", FilterTypes.STRING, true, true, "ASC");
Column includeInWHMapping_col =new Column("includeInWHMapping", "includeInWHMapping", "Include in WH Mapping?", FilterTypes.NONE, true, true, "");
columns.put("fileid", fileid_col);
columns.put("releasetag", releasetag_col);
columns.put("applicationid", applicationid_col);
columns.put("filename", filename_col);
columns.put("includeInWHMapping", includeInWHMapping_col);
initialize();
setOrderField("importDate");
setOrder("DESC");
dataSetParameters.setColumns(columns);
loadTable();
}
/** getter/setter.. */
public boolean isSelectAll() {
return selectAll;
}
public void setSelectAll(boolean selectAll) {
this.selectAll = selectAll;
}
public Map<StandardStructure, Boolean> getChecked() {
return checked;
}
public void setChecked(Map<StandardStructure, Boolean> checked) {
this.checked = checked;
}
/** Load ssTable */
private void loadTable() {
try{
ssTable = new StandardStructureDao(dataSetParameters).getAllStandardStructure();
}catch (Exception ex){
System.out.println("Exception in loading table:"+ex);
}
}
/** Get ssTable */
public Collection<StandardStructure> getSsTable(){
return ssTable.getDto();
}
/** Pagination */
public void doPaginationChange(ActionEvent event) {
super.doPaginationChange(event);
loadTable();
/* trying to set the value of list of checkboxes after loading the table */
Iterator<StandardStructure> keys = checked.keySet().iterator();
while(keys.hasNext()){
StandardStructure ss = keys.next();
if(checked.get(ss)){ /* getting checked boxes */
/* Got stuck here. */
/* How do we just set the true (boolean) value only
for list of checkboxes though they are in Map?*/
System.out.println("Row id: " + ss.getRowid() + " Checked : " + checked.get(ss));
}
}
}
/** Select all the list of checkbox in datatable */
public void selectAllCheckBox(){
for(StandardStructure item : ssTable.getDto()){
if(!selectAll)
checked.put(item, true);
else
checked.put(item, false);
}
}
/** Select row of data in datatable */
public void selectAllRows(ValueChangeEvent e) {
boolean newSelectAll = (Boolean) e.getNewValue();
Iterator<StandardStructure> keys = checked.keySet().iterator();
logger.info("Rows selected..." + newSelectAll);
while(keys.hasNext()) {
StandardStructure ss = keys.next();
checked.put(ss, newSelectAll);
System.out.println("File::"+ss.getRowid()+":"+newSelectAll);
}
}
多谢!
由于您的代码不清楚且令人困惑，因此我将提供一个最小的示例，说明在当前页面上使用select all进行分页可能是什么样子。没有动作监听器，只有getter和setter。越简单越好
第一XHTML:
<h:form>
<rich:dataTable value="#{bean.valuesOnPage}" var="data" id="dataTable" rows="20">
<rich:column>
<f:facet name="header">
<h:selectBooleanCheckbox value="#{bean.selectAll}">
<f:ajax render="dataTable" />
</h:selectBooleanCheckbox>
</f:facet>
<h:selectBooleanCheckbox value="#{bean.checked[data]}">
<f:ajax />
</h:selectBooleanCheckbox>
</rich:column>
<!-- other columns -->
</rich:dataTable>
</h:form>
然后是豆子:
@ManagedBean(name = "bean")
@ViewScoped
public class MyBean {
// when the view is first loaded this is empty
// until someone will click one of checkboxes
private Map<Object, Boolean> checked = new HashMap<Object, Boolean>();
private boolean selectAll;
private List<Object> valuesOnPage;
private int currentPage = -1;
MyBean() {
setCurrentPage(1);
}
// no setter
public Map<Object, Boolean> getChecked() {
return checked;
}
public int getCurrentPage() {
return currentPage;
}
public boolean getSelectAll() {
return selectAll;
}
// no setter
public List<Object> getValuesOnPage() {
return valuesOnPage;
}
private void loadTable() {
try {
// gets data from data base
valuesOnPage = getData(currentPage);
} catch (Exception ex) {
System.out.println("Exception in loading table:" + ex);
}
}
public void setCurrentPage(int currentPage) {
if (this.currentPage != currentPage) {
this.currentPage = currentPage;
loadTable();
// we don't need it selected, especially if it
// was a paged we've never been on
selectAll = false;
}
}
public void setSelectAll(boolean selectAll) {
this.selectAll = selectAll;
for (Object o : valuesOnPage) {
checked.put(o, selectAll);
}
}
}
查看数据是如何以及何时变化的，以及何时加载的。检查单行复选框是否没有不必要的新操作。JSF将通过:value="#{bean.checked[data]}" .
再次强调:map中的键是对象。你必须确保equals方法是正确的。在95%的情况下，默认值不是，特别是如果它们是@Entity。