spring MVC+mybatis+spring security筆記<一>

這是我自己的學習筆記。

程序猿界的新兵，感覺要學的東西好多好多，最近要給項目裏增加權限控制的功能，就想到了spring security。網上好多security的例子，但是放到自己項目裏就各種報錯，還是自己來吧，從最簡單的學起。

環境：JDK1.7 +tomcat8；spring4.0；mybatis3.1；spring security3.2.

剛開始先不加自定義的登陸頁面，也不結合數據庫。使用spring security最基礎的功能：

<1>spring的配置文件

<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"  
 xmlns:context="http://www.springframework.org/schema/context"  
 xmlns:p="http://www.springframework.org/schema/p"  
 xmlns:mvc="http://www.springframework.org/schema/mvc"  
 xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
 xsi:schemaLocation="http://www.springframework.org/schema/beans  
      http://www.springframework.org/schema/beans/spring-beans-3.0.xsd  
      http://www.springframework.org/schema/context  
      http://www.springframework.org/schema/context/spring-context.xsd  
      http://www.springframework.org/schema/mvc  
      http://www.springframework.org/schema/mvc/spring-mvc-3.0.xsd">
      
    <!-- 啓動註解驅動的Spring MVC功能，註冊請求url和pojo類方法的映射 -->
	<mvc:annotation-driven/>
	
	<mvc:default-servlet-handler/>
	<!-- 啓動包掃描功能且只掃描@Controller -->
	<context:component-scan base-package="包名.controller">
		<context:include-filter type="annotation" expression="org.springframework.stereotype.Controller"/>
	</context:component-scan>
	
	<!-- 對模型視圖的解析 -->
	<bean class="org.springframework.web.servlet.view.InternalResourceViewResolver">
		<property name="prefix" value="/WEB-INF/jsp/"></property>
		<property name="suffix" value=".jsp"></property>
	</bean>
	  
</beans>

<2>spring security 的配置文件

<?xml version="1.0" encoding="UTF-8"?>
<beans:beans xmlns="http://www.springframework.org/schema/security"
	xmlns:beans="http://www.springframework.org/schema/beans" 
	xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
	xsi:schemaLocation="http://www.springframework.org/schema/beans 
	http://www.springframework.org/schema/beans/spring-beans-3.0.xsd 
	http://www.springframework.org/schema/security 
	http://www.springframework.org/schema/security/spring-security.xsd">
	
	<http auto-config="true">
		<intercept-url pattern="/index.jsp" access="ROLE_ADMIN,ROLE_USER"/>
		<intercept-url pattern="/main.jsp" access="ROLE_ADMIN"/>
		<access-denied-handler error-page="/error.jsp"/>
	</http>
	
	<authentication-manager>
		<authentication-provider>
			<user-service>
				<user name="admin" password="admin" authorities="ROLE_ADMIN"/>
				<user name="tom" password="123456" authorities="ROLE_USER"/>
			</user-service>
		</authentication-provider>
	</authentication-manager>
</beans:beans>

在配置文件中定義了兩個用戶：admin和tom，他們各自所擁有的權限分別是ROLE_ADMIN和ROLE_USER；

同時有兩個頁面index,jsp和main.jsp，index.jsp是使用spring security自帶的登陸頁面成功登陸後的頁面，ROLE_ADMIN和ROLE_USER權限都可以訪問，main.jsp只有ROLE_ADMIN的權限纔可以訪問；

error-page就是當權限不夠時提示的錯誤頁面。

<3>web.xml

<?xml version="1.0" encoding="UTF-8"?>
<web-app version="2.5" 
	xmlns="http://java.sun.com/xml/ns/javaee" 
	xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" 
	xsi:schemaLocation="http://java.sun.com/xml/ns/javaee 
	http://java.sun.com/xml/ns/javaee/web-app_2_5.xsd">
	
	<context-param>
  	<param-name>contextConfigLocation</param-name>
  	<param-value>
  		classpath:spring-security.xml
  	</param-value>
  </context-param>
  
  <listener>
  	<listener-class>org.springframework.web.context.ContextLoaderListener</listener-class>
  </listener>
  <!-- spring security配置 -->
  <filter>  
  	<filter-name>springSecurityFilterChain</filter-name>  
  	<filter-class>org.springframework.web.filter.DelegatingFilterProxy</filter-class>
  </filter>
  <filter-mapping>  
    <filter-name>springSecurityFilterChain</filter-name>
    <url-pattern>/*</url-pattern>
  </filter-mapping>
    
  <filter>
		<filter-name> encodingFilter</filter-name>
		<filter-class>
			org.springframework.web.filter.CharacterEncodingFilter
		</filter-class>
		<init-param>
			<param-name> encoding</param-name>
			<param-value>UTF-8</param-value>
		</init-param>
  </filter>
  <filter-mapping>
		<filter-name>encodingFilter</filter-name>
		<url-pattern>*.do</url-pattern>
  </filter-mapping>
  
  <!-- 核心servlet配置 -->
  <servlet>
  	<servlet-name>spring</servlet-name> 
  	<servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>
  	<init-param>
  		<param-name>contextConfigLocation</param-name>
  		<param-value>classpath*:spring-servlet.xml</param-value>
  	</init-param>
  	<load-on-startup>1</load-on-startup>
  </servlet>
  <servlet-mapping>
  	<servlet-name>spring</servlet-name>
  	<url-pattern>*.do</url-pattern>
  </servlet-mapping>

</web-app>

<4>index.jsp  main.jsp  error.jsp

   index.jsp：

<body>
	<h1>登錄成功，<a href="main.jsp">點擊</a>進入主頁面</h1>
	<a href="<%=path%>/j_spring_security_logout">LOGOUT</a>
</body>

main.jsp:

<body>
	<a href="index.jsp">返回</a>
</body>

error.jsp

<body>
	<h1>ERROR:你有沒有權限</h1>
</body>

----------------------------------------------------------------------------------------------------

OK，現在啓動tomcat，會跳轉到spring security自己的登錄界面

----使用賬號admin/admin登錄：

----點擊進入主頁面：

成功了，現在返回註銷，使用tom/123456登錄到index.jsp後再點擊進入主頁面：

最基本的權限控制實現了。。接下來就自定義登錄頁面，當然用戶信息和權限信息要也從數據庫中獲取了。