在将值传递到另一页时遇到问题。
我的索引页面,其中有学生姓名的输入文字
<h:form>
<h:inputText id="name"
value="#{student.name}"
label="name"
required="true"
requiredMessage="Name is required"/>
<h:message for="name" styleClass="error"/>
<h:commandButton value="Add" action="#{school.add(name)}" />
</h:form>
受管豆学生:(必须在请求范围内查看)
@Named(value = "student")
@RequestScoped
public class Student {
private String name;
public Student() {
}
public Student(String name){
this.name = name;
}
public String getName(){
return this.name;
}
public void setName(String name){
this.name = name;
}
}
豆类学校:
@Named(value = "school")
@SessionScoped
public class School implements Serializable{
private ArrayList<Student> student;
public School() {
students = new ArrayList<>();
}
public ArrayList<Student> getStudents() {
return students;
}
public void setStudents(ArrayList<Student> students) {
this.students = students;
}
public void add(Student student) throws IOException{
if(students.size() < 1){
this.students.add(new Student(student.getName()));
FacesContext.getCurrentInstance().getExternalContext().redirect("list.xhtml");
} else {
FacesContext.getCurrentInstance().getExternalContext().redirect("error.xhtml");
}
}
}
如果有很多学生,我需要在最后一页上获得学生的姓名,我尝试<h3>#{student.name}</h3>
,但它什么都没有显示。
有人知道我如何使它工作吗?