我想用jsf 2.0创建简单的博客。它包含2类:JSf在简单的博客请求范围
BlogManager(session范围内) 博客(请求范围)
@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);
}
}
的博客类:
@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;
}
}
然后我XHTML表单里面我写这个东西:
<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>
当我点击提交它说博客目标无法访问。这是请求范围。我一直在想,jsf无法找到博客对象,然后创建并将用户输入分配给博客对象。那么我可以在blogManager中看到它。但它不起作用。我应该使用博客类的范围?我可以在blogManager中注入请求范围吗?
感谢
只是好奇,你的'blog' bean似乎没有任何行为,那么需要将它定义为'RequestScoped' bean?为什么不把它保留一个简单的pojo? – Nikhil 2012-03-08 07:31:44
如果我这样做了简单的pojo,那么我就不能在xhml页面中为用户输入使用它:例如: –
Elbek
2012-03-08 07:33:18
如果使用'@ManagedBean(”YourBean“)'注释而不是使用'@Named(”YourBean“)''会发生什么?试试看 – Lion 2012-03-08 08:08:28