我有一个 Hotel 对象列表，我想在 jsf 数据表中显示每个对象的值。我遇到的问题是，虽然表为每个酒店对象创建一行，但值并未显示。
这是我的酒店等级:
public class Hotel {
private int id;
private String hotelname;
private String address;
private String information;
private int number_rooms_total;
private String pathimage;
public Hotel() {
}
public Hotel(int id, String hotelname, String address, String information, int number_rooms_total, String pathimage) {
this.id = id;
this.hotelname = hotelname;
this.address = address;
this.information = information;
this.number_rooms_total = number_rooms_total;
this.pathimage = pathimage;
}
public int getId() {
return id;
}
public void setId(int id) {
this.id = id;
}
public String getHotelname() {
return hotelname;
}
public void setHotelname(String hotelname) {
this.hotelname = hotelname;
}
public String getAddress() {
return address;
}
public void setAddress(String address) {
this.address = address;
}
public String getInformation() {
return information;
}
public void setInformation(String information) {
this.information = information;
}
public int getNumber_rooms_total() {
return number_rooms_total;
}
public void setNumber_rooms_total(int number_rooms_total) {
this.number_rooms_total = number_rooms_total;
}
public String getPathimage() {
return pathimage;
}
public void setPathimage(String pathimage) {
this.pathimage = pathimage;
}
@Override
public int hashCode() {
int hash = 3;
hash = 83 * hash + this.id;
return hash;
}
@Override
public boolean equals(Object obj) {
if (this == obj) {
return true;
}
if (obj == null) {
return false;
}
if (getClass() != obj.getClass()) {
return false;
}
final Hotel other = (Hotel) obj;
if (this.id != other.id) {
return false;
}
return true;
}
@Override
public String toString() {
return "Hotel{" + "id=" + id + ", hotelname=" + hotelname + ", address=" + address + ", information=" + information + ", number_rooms_total=" + number_rooms_total + ", image=" + pathimage + '}';
}
}
这是我的 JSF 页面:
<?xml version='1.0' encoding='UTF-8' ?>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN"
"http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml"
xmlns:h="http://xmlns.jcp.org/jsf/html"
xmlns:f="http://xmlns.jcp.org/jsf/core">
<h:head>
<title>Facelet Title</title>
</h:head>
<h:body>
<h2>List Hotels</h2>
<legend>Hotels Form</legend>
<h:form>
<h:dataTable value="#{listHotels.hotels}" var="hotel" border="3">
<h:column>
<f:facet name="header">ID Hotel</f:facet>
<h:outputText> value="#{hotel.id}"</h:outputText>
</h:column>
<h:column>
<f:facet name="header">Name</f:facet>
<h:outputText> value="#{hotel.hotelname}"</h:outputText>
</h:column>
<h:column>
<f:facet name="header">Address</f:facet>
<h:outputText> value="#{hotel.address}"</h:outputText>
</h:column>
<h:column>
<f:facet name="header">Image</f:facet>
<h:graphicImage value="#{hotel.pathimage}" />
</h:column>
<h:column>
<f:facet name="header">New Booking</f:facet>
<h:commandButton value="NewBooking" action="#{listHotels.newBooking(hotel)}"></h:commandButton>
</h:column>
<h:column>
<f:facet name="header">List Booking</f:facet>
<h:commandButton value="ListBooking" action="#{listHotels.listBookings(hotel)}"></h:commandButton>
</h:column>
</h:dataTable>
<div id="message">
== #{listHotels.message} ==
</div>
</h:form>
</h:body>
这是我的 Bean 类:
@ManagedBean
@SessionScoped
public class ListHotels implements Serializable {
private Database db = null;
private String message = null;
private ArrayList<Hotel> hotels = new ArrayList<>();
private Hotel currHotel;
public ListHotels() {
try {
db = Database.getInstance();
} catch (Exception ex) {
System.out.println("ex: " + ex.getMessage());
}
}
public ArrayList<Hotel> getHotels() {
System.out.println("hallofff");
hotels.clear();
try {
hotels = db.getAllHotels();
System.out.println(hotels);
message = "all hotels listed";
System.out.println("message " + message);
} catch (Exception ex) {
message = "ex :" + ex.getMessage();
}
return hotels;
}
public void setHotels(ArrayList<Hotel> hotels) {
this.hotels = hotels;
}
public String newBooking(Hotel h) {
String retUrl = "NewBooking";
currHotel = h;
return retUrl;
}
public String listBookings(Hotel h) {
String retUrl = "ListBookings";
currHotel = h;
return retUrl;
}
public String getMessage() {
return message;
}
public void setMessage(String message) {
this.message = message;
}
public Hotel getCurrHotel() {
return currHotel;
}
public void setCurrHotel(Hotel currHotel) {
this.currHotel = currHotel;
}
}
方法hotels = db.getAllHotels();从我的 SQL 数据库返回所有酒店。我已经检查过，数组列表中的值是正确的。所以我真的不知道为什么我会遇到这个问题......这看起来很简单但却不可能。
最佳答案
前 3 列的 outputText 标记中似乎存在错误。
开始标记上的 > 位置不正确。
<h:outputText> value="#{hotel.id}"</h:outputText>
更改为
<h:outputText value="#{hotel.id}" />
然后再次检查。
关于java - 数据表不显示值，我们在Stack Overflow上找到一个类似的问题： https://stackoverflow.com/questions/55373582/