首先,寫一個IUserService的接口,接口中只有屬性方法: getUsername, getPassword, setUsername, setPassword四個方法.代碼如下:
package net.moon.service;
public interface IUserService ...{
String getUsername();
String getPassword();
void setUsername(String username);
void setPassword(String password);
}
用一個類實現(xiàn)該接口,代碼如下:
package net.moon.model;
import net.moon.service.IUserService;
public class UserInfo implements IUserService...{
private String username;
private String password;
/** *//**
* @return the usernmae
*/
public String getUsername() ...{
return username;
}
/** *//**
* @param usernmae the usernmae to set
*/
public void setUsername(String usernmae) ...{
this.username = usernmae;
}
/** *//**
* @return the password
*/
public String getPassword() ...{
return password;
}
/** *//**
* @param password the password to set
*/
public void setPassword(String password) ...{
this.password = password;
}
}
寫一個事務(wù)類,實現(xiàn)login功能,其中有一個類型為IUserService的域,代碼如下:
package net.moon.business;
import net.moon.service.IUserService;
public class UserBO ...{
IUserService user;
public String login()...{
String result = "FAILED";
//System.out.println(result);
if(user.getUsername().equalsIgnoreCase("admin")
&& user.getPassword().equals("password"))...{
result = "PASS";
}
return result;
}
/** *//**
* @return the user
*/
public IUserService getUser() ...{
return user;
}
/** *//**
* @param user the user to set
*/
public void setUser(IUserService user) ...{
this.user = user;
}
}
注意該類中的屬性方法setUser, 其中的參數(shù)user作為IUserService的接口類型.然后就是用什么方法對user進行注入,這時候就要想到JSF中的Managed Properties.
首先在,faces-config中配置UserInfo類為MBean,代碼如下:
<managed-bean>
<managed-bean-name>userInfo</managed-bean-name>
<managed-bean-class>net.moon.model.UserInfo</managed-bean-class>
<managed-bean-scope>session</managed-bean-scope>
</managed-bean>
然后將事務(wù)類UserBO也配置為MBean,代碼如下:
<managed-bean>
<managed-bean-name>userBO</managed-bean-name>
<managed-bean-class>
net.moon.business.UserBO
</managed-bean-class>
<managed-bean-scope>request</managed-bean-scope>
<managed-property>
<property-name>user</property-name>
<property-class>
net.moon.service.IUserService
</property-class>
<value>#{userInfo}</value>
</managed-property>
</managed-bean>
為userBO這個MBean配置了一個Managed Property,也就是要求JSF在實現(xiàn)userBO時, 用userInfo這個MBean為其user這個域賦值,從而實現(xiàn)注入.
接下來就是頁面的實現(xiàn)了,首先是login頁面, 代碼如下:
<%...@ page contentType="text/html; charset=UTF-8" %>
<%...@ taglib uri="http://java.sun.com/jsf/html" prefix="h" %>
<%...@ taglib uri="http://java.sun.com/jsf/core" prefix="f" %>
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8"/>
<title></title>
</head>
<body>
<f:view>
<h:form>
<h:panelGrid border="1" columns="2">
<h:outputText value="User Name:"></h:outputText>
<h:inputText value="#{userInfo.username}"></h:inputText>
<h:outputText value="Password:"></h:outputText>
<h:inputText value="#{userInfo.password}"></h:inputText>
</h:panelGrid>
<h:commandButton value="Login" action="#{userBO.login}"></h:commandButton>
</h:form>
</f:view>
</body>
</html>
表示登錄成功的頁面welcome.jsp,代碼如下:
<%...@ page contentType="text/html; charset=UTF-8" %>
<%...@ taglib uri="http://java.sun.com/jsf/html" prefix="h" %>
<%...@ taglib uri="http://java.sun.com/jsf/core" prefix="f" %>
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8"/>
<title></title>
</head>
<body>
<f:view>
<h:form>
<h:outputText value="Welcome , #{userInfo.username}"></h:outputText>
</h:form>
</f:view>
</body>
</html>
配置導航如下:
<navigation-rule>
<display-name>login</display-name>
<from-view-id>/login.jsp</from-view-id>
<navigation-case>
<from-action>#{userBO.login}</from-action>
<from-outcome>PASS</from-outcome>
<to-view-id>/welcome.jsp</to-view-id>
</navigation-case>
<navigation-case>
<from-action>#{userBO.login}</from-action>
<from-outcome>FAILED</from-outcome>
<to-view-id>/login.jsp</to-view-id>
</navigation-case>
</navigation-rule>