Vaadin：「容器中必須存在ID」，在調用setVisibleColumns（）

我正在構建基於Vaadin教程的SimpleAddressBook的小型應用程序。Vaadin：「容器中必須存在ID」，在調用setVisibleColumns（）

就像在教程中，我有一個容器擴展BeanItemContainer，它用於填充表。

爲什麼我越來越：

 

     java.lang.IllegalArgumentException: Ids must exist in the Container or as a generated column , missing id: title

儘管事實上，我在我的Bean類「標題」字段？

BeanItemContainer：

package com.example.library.content; 

import java.io.Serializable; 
import com.vaadin.data.util.BeanItemContainer; 

@SuppressWarnings("serial") 
public class BooksContainer extends BeanItemContainer<Book> implements 
     Serializable { 

    public static final Object[] NATURAL_COL_ORDER = new Object[] { 
      "title", "author", "year", "ISBN"}; 

    public static final String[] COL_HEADERS_POLISH = new String[] { 
      "Tytul", "Autor", "Rok", "ISBN"}; 

    public BooksContainer() throws InstantiationException, 
      IllegalAccessException { 
     super(Book.class); 
    } 

    public static BooksContainer createWithTestData() { 
     final String[] titles = { "Peter", "Alice", "Joshua", "Mike", "Olivia"}; 
     final String[] authors = { "Smith", "Gordon", "Simpson", "Brown", 
       "Clavel"}; 
     final int[] years = { 1594, 1834, 1922, 1983, 1984}; 
     final String isbns[] = { "4215 Blandit Av.", "452-8121 Sem Ave", 
       "279-4475 Tellus Road", "4062 Libero. Av.", "7081 Pede. Ave",}; 

     BooksContainer booksContainer = null; 
     try { 
      booksContainer = new BooksContainer(); 

      for (int i = 0; i < titles.length; i++) { 
       Book book = new Book(); 
       book.setTitle(titles[i]); 
       book.setAuthor(authors[i]); 
       book.setYear(years[i]); 
       book.setISBN(isbns[i]); 

       booksContainer.addItem(book); 
      } 
     } catch (InstantiationException e) { 
      // TODO Auto-generated catch block 
      e.printStackTrace(); 
     } catch (IllegalAccessException e) { 
      // TODO Auto-generated catch block 
      e.printStackTrace(); 
     } 

     return booksContainer; 
    } 

}

書：

package com.example.library.content; 

public class Book { 
    private String title; 
    private String author; 
    private int year; 
    private String ISBN; 


    public String getTitle() { 
     return title; 
    } 

    public void setTitle(String title) { 
     this.title = title; 
    } 

    public String getAuthor() { 
     return author; 
    } 

    public void setAuthor(String author) { 
     this.author = author; 
    } 

    public int getYear() { 
     return year; 
    } 

    public String getISBN() { 
     return ISBN; 
    } 

    public void setYear(int year) { 
     this.year = year; 
    } 

    public void setISBN(String isbn) { 
     this.ISBN = isbn; 
    } 


}

BooksTableView

public class BooksTableView extends Table { 

    public BooksTableView(LibraryApplication libraryApp) { 
    setSizeFull(); 

    setContainerDataSource(BooksContainer.createWithTestData()); 

    setVisibleColumns(BooksContainer.NATURAL_COL_ORDER); 
    setColumnHeaders(BooksContainer.COL_HEADERS_POLISH); 
    } 
}

來源

2012-08-17 Lukas Fryc

有時熱部署無法正常工作。嘗試停止/取消部署應用程序，從頭構建並重新啓動/重新部署應用程序。它應該工作。 – zip 2012-08-27 08:38:15

我遇到了同樣令人沮喪的問題，您是否設法解決這個問題？ – Fabii 2012-11-30 03:55:13

我與Vaadin 6.8.2測試你的代碼和它的作品。

來源

2012-08-17 14:39:43

Vaadin：「容器中必須存在ID」，在調用setVisibleColumns（）

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