我有JSF 2属性绑定的问题,说实话,我在这里碰壁了..
我想要完成的是:请求范围的bean(loginBean)进程登录操作并将用户名存储在会话范围的bean(userBean)中。我想通过@ManagedProperty将userBean注入loginBean,但是当调用loginBean.doLoginAction时,userBean被设置为null。
以下是代码:
UserBean类
import javax.faces.bean.ManagedBean;
import javax.faces.bean.SessionScoped;
@ManagedBean
@SessionScoped
public class UserBean {
private String username;
public String getUsername() {
return username;
}
public void setUsername(String username) {
this.username = username;
}
public boolean isLogged() {
if (username != null)
return true;
return false;
}
}
loginBean类:
import javax.faces.bean.ManagedBean;
import javax.faces.bean.ManagedProperty;
import javax.faces.bean.RequestScoped;
@ManagedBean
@RequestScoped
public class LoginBean {
@ManagedProperty(value = "userBean")
private UserBean userBean;
private String name;
private String password;
public String getName() {
return name;
}
public void setName(String name) {
this.name = name;
}
public String getPassword() {
return password;
}
public void setPassword(String password) {
this.password = password;
}
public UserBean getUserBean() {
return userBean;
}
public void setUserBean(UserBean userBean) {
this.userBean = userBean;
}
public String doLoginAction() {
if (name.equals("kamil") && password.equals("kamil")) {
userBean.setUsername(name);
}
return null;
}
public String doLogoutAction() {
return null;
}
}
我在这里做错了什么想法?
答案 0 :(得分:6)
您需要指定EL表达式#{}
,而不是普通字符串:
@ManagedProperty(value = "#{userBean}")
private UserBean userBean;
或更短,因为value
attirbute已经是默认值:
@ManagedProperty("#{userBean}")
private UserBean userBean;