我正在关注此链接http://balusc.blogspot.com/2006/06/using-datatables.html,以选择多个复选框并检索bean中的值:
我的jsf代码如下:
<p:dataTable value="#{deviceController.devicesModel}"
var="item" widgetVar="deviceTable"
selection="#{deviceController.selectedDevices}"
rowKey='#{item}'>
<p:column sortBy="#{item.manufacturerSerialNum}" filterBy="#{item.manufacturerSerialNum}">
<f:facet name="header">
<h:outputText value="Manufacturer Serial No"/>
</f:facet>
<h:outputText value="#{item.manufacturerSerialNum}" />
</p:column>
<p:column selectionMode="multiple">
<f:facet name="header">
<h:outputText value="#{bundle.ListLaptopTitle_inService}"/>
</f:facet>
<h:selectBooleanCheckbox value="#{item.isInService}"/>
</p:column>
</p:dataTable>
<p:commandButton action="#{deviceController.getSelectedItems}"
value="Submit Request" style="margin-top: 20px"/>
我的bean代码是:
public String getSelectedItems(){
selectedDevicesList = new ArrayList<Device>();
List<Device> dev=createDeviceList();
for (Device item :dev ) {
if (item.getIsInService()) {
selectedDevicesList.add(item);
item.setIsInService(false); // Reset.
}
}
return "selected";
}
我不理解的是我们从表中传递所选行的值的位置。最初,如果我有4行并且当我检查两行时所有复选框都未选中,那么它应该转到bean,这两个值应该在数据库中更新。就像我应该在这个bean中得到这两个bean的inservice
字段的值为true。你能让我知道我错过了什么。谢谢。
答案 0 :(得分:2)
您基本上将 POST 请求内容与 GET 混合使用。您的<p:commandButton />
action
方法只需要获取已存储在bean上的内容并将其发送到您的控制器层。
来自那里的公寓,其他错误是Primefaces manages the check selection列本身,而你手动注入一个<h:selectBooleanCheckbox />
来执行该操作。
按<p:column selectionMode="multiple" style="width:2%" />
替换上一栏将完成将您的选择存储在#{deviceController.selectedDevices}
中的工作。
只需查看这个简单的SSCCE即可获得所需的功能:
托管Bean
@ManagedBean
@ViewScoped
public final class TestManagedBean implements Serializable {
public class Test {
private int id;
private String description;
private boolean selected;
public Test(int id, String desc) {
this.id = id;
this.description = desc;
}
public String getDescription() {
return description;
}
public int getId() {
return id;
}
public boolean isSelected() {
return selected;
}
public void setDescription(String description) {
this.description = description;
}
public void setId(int id) {
this.id = id;
}
public void setSelected(boolean selected) {
this.selected = selected;
}
@Override
public String toString() {
return "Test [description=" + description + ", selected="
+ selected + "]";
}
}
private List<Test> list;
private List<Test> selectedValues;
public TestManagedBean() {
}
public void actionSave() {
//Perform DB stuff with selectedValues
System.out.println("Table saved");
}
public List<Test> getList() {
return list;
}
public List<Test> getSelectedValues() {
return selectedValues;
}
@PostConstruct
public void init() {
list = Arrays.asList(new Test(1, "Tanzania"), new Test(2, "India"));
}
}
xhtml页面
<html xmlns="http://www.w3.org/1999/xhtml"
xmlns:h="http://java.sun.com/jsf/html"
xmlns:p="http://primefaces.org/ui">
<h:head>
<title>Test page</title>
</h:head>
<h:body>
<h:form>
<p:dataTable value="#{testManagedBean.list}"
selection="#{testManagedBean.selectedValues}" var="value"
rowKey="#{value.id}">
<p:column>
#{value.description}
</p:column>
<p:column selectionMode="multiple" style="width:2%" />
</p:dataTable>
<h:commandButton value="send" action="#{testManagedBean.actionSave}" />
</h:form>
</h:body>
</html>