我想用jsf 2.0創建簡單的博客。它包含2類:JSf在簡單的博客請求範圍
BlogManager(session範圍內) 博客(請求範圍)
@Named("blogManager")
@SessionScoped
public class BlogManager {
private List<Blog> blogs;
@ManagedProperty(value = "#{blog}")
Blog blog;
public BlogManager() {
blogs = new ArrayList<Blog>();
}
public List<Blog> getBlogs() {
return blogs;
}
public void setBlogs(List<Blog> blogs) {
this.blogs = blogs;
}
public Blog getBlog() {
return blog;
}
public void setBlog(Blog blog) {
this.blog = blog;
}
public void addBlog() {
blogs.add(blog);
}
public void removeBlog(Blog blog) {
blogs.add(blog);
}
}
的博客類:
@Named("blog")
@RequestScoped
public class Blog {
private Integer id;
private String title;
private String text;
private Date date;
public Blog() {
id = (int) System.currentTimeMillis();
}
private Integer readed;
public String getTitle() {
return title;
}
public void setTitle(String title) {
this.title = title;
}
public String getText() {
return text;
}
public void setText(String text) {
this.text = text;
}
public Date getDate() {
return date;
}
public void setDate(Date date) {
this.date = date;
}
public Integer getReaded() {
return readed;
}
public void setReaded(Integer readed) {
this.readed = readed;
}
public Integer getId() {
return id;
}
public void setId(Integer id) {
this.id = id;
}
}
然後我XHTML表單裏面我寫這個東西:
<h:form>
<fieldset>
<legend>Blog</legend>
<p>
Title:
<h:inputText value="#{blog.title}" />
</p>
<p>
Text:
<h:inputTextarea value="#{blog.text}" />
</p>
<p>
<h:commandButton action="#{blogManager.addBlog}" />
</p>
</fieldset>
</h:form>
當我點擊提交它說博客目標無法訪問。這是請求範圍。我一直在想,jsf無法找到博客對象,然後創建並將用戶輸入分配給博客對象。那麼我可以在blogManager中看到它。但它不起作用。我應該使用博客類的範圍?我可以在blogManager中注入請求範圍嗎?
感謝
只是好奇,你的'blog' bean似乎沒有任何行爲,那麼需要將它定義爲'RequestScoped' bean?爲什麼不把它保留一個簡單的pojo? – Nikhil 2012-03-08 07:31:44
如果我這樣做了簡單的pojo,那麼我就不能在xhml頁面中爲用戶輸入使用它:例如: –
Elbek
2012-03-08 07:33:18
如果使用'@ManagedBean(」YourBean「)'註釋而不是使用'@Named(」YourBean「)''會發生什麼?試試看 – Lion 2012-03-08 08:08:28