我需要做些什么才能通过打开的输入字段<h:inputText value="#{x.orderNo}" rendered="#{x.editable}"/>?
我使用List方法从sql db中检索数据:
@SuppressWarnings("serial")
@ManagedBean(name= "user")
@SessionScoped
public class User implements Serializable{
static final String JDBC_DRIVER= "com.mysql.jdbc.Driver";
static final String DB_URL= "jdbc:mysql://localhost/updateTesting";
static final String USER= "****";
static final String PASS= "****";
static Connection connection;
static PreparedStatement prepStatement;
static List<Values> valuesList;
static Values allValues;
private static List<Values> getUsers(){
try {
databaseConnection();
String SQL= "SELECT * FROM Registration";
System.out.println("Retreive values from Registration table...");
PreparedStatement prepStatement= connection.prepareStatement(SQL);
valuesList= new ArrayList<>();
ResultSet resultSet= prepStatement.executeQuery();
boolean found= false;
while(resultSet.next()== true){
allValues= new Values();
allValues.setId(resultSet.getInt("id"));
allValues.setOrderNo(resultSet.getString("orderNo"));
allValues.setProductName(resultSet.getString("productName"));
allValues.setPrice(resultSet.getBigDecimal("price"));
allValues.setQty(resultSet.getInt("qty"));
valuesList.add(allValues);
found= true;
}
resultSet.close();
prepStatement.close();
close(connection);
if(found){
return valuesList;
}else {
return null;
}
} catch (Exception e) {
// TODO: handle exception
e.printStackTrace();
System.out.println("Error in getUsers()-->"+e.getMessage());
}
return (null);
}
public List<Values> getInformation(){
return getUsers();
}
这里我尝试创建新的List并将其与我的List方法getUsers()合并。当我点击按钮AddNew
时,调用方法addNewUser()
必须打开列表底部的输入字段。避免出现任何明显的错误,一切正常,但没有任何反应:
private List<Values> myList;
public List<Values> getMyList() {
return myList;
}
public void addNewUser(){
myList= getUsers();
allValues = new Values();
allValues.setEditable(true);
myList.add(allValues);
}
xhtml页面:
<h:form>
<center>
<h:dataTable value="#{user.information}" var="x" border="1" id="table">
<h:column>
<f:facet name="header">
<h:outputText value="Id"></h:outputText>
</f:facet>
<h:outputText value="#{x.id}"></h:outputText>
</h:column>
<h:column>
<f:facet name="header">
<h:outputText value="Order No"></h:outputText>
</f:facet>
<h:inputText value="#{x.orderNo}" rendered="#{x.editable}"></h:inputText>
<h:outputText value="#{x.orderNo}" rendered="#{not x.editable}"></h:outputText>
</h:column>
<h:column>
<f:facet name="header">
<h:outputText value="Product name"></h:outputText>
</f:facet>
<h:inputText value="#{x.productName}" rendered="#{x.editable}"></h:inputText>
<h:outputText value="#{x.productName}" rendered="#{not x.editable}"></h:outputText>
</h:column>
<h:column>
<f:facet name="header">
<h:outputText value="Price"></h:outputText>
</f:facet>
<h:inputText value="#{x.price}" rendered="#{x.editable}"></h:inputText>
<h:outputText value="#{x.price}" rendered="#{not x.editable}"></h:outputText>
</h:column>
<h:column>
<f:facet name="header">
<h:outputText value="Quantity"></h:outputText>
</f:facet>
<h:inputText value="#{x.qty}" rendered="#{x.editable}"></h:inputText>
<h:outputText value="#{x.qty}" rendered="#{not x.editable}"></h:outputText>
</h:column>
</h:dataTable>
<h:commandButton value="AddNew" action="#{values.addNewUser}" update="table"/>
</center>
</h:form>