Spring Security從后台數據庫查詢實現登陸控制


Spring Security框架是一個控制登陸的框架,通過配置文件獲取后台的用戶名及密碼,進行比較進行登陸判斷

使用步驟

  1、導入依賴

<!-- 身份驗證 -->
            <dependency>
                <groupId>org.springframework.security</groupId>
                <artifactId>spring-security-web</artifactId>
                <version>4.1.0.RELEASE</version>
            </dependency>
            <dependency>
                <groupId>org.springframework.security</groupId>
                <artifactId>spring-security-config</artifactId>
                <version>4.1.0.RELEASE</version>
            </dependency>

  2、web.xml文件中加載spring-security.xml文件

 <context-param>
      <param-name>contextConfigLocation</param-name>
      <param-value>classpath:spring/spring-security.xml</param-value>
      </context-param>
    <listener>
      <listener-class>
        org.springframework.web.context.ContextLoaderListener
      </listener-class>
    </listener>

    <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>

  3、前端頁面

   

  4、后台代碼中創建一個實體類實現 UserDetailsService接口,實現其中的方法

//用戶登錄的認證類
public class UserDetailsServiceImpl  implements UserDetailsService {
  //service層是獲取后台數據庫中的用戶名信息
    private SellerService sellerService;
    //set方法注入一個
    public void setSellerService(SellerService sellerService) {
        this.sellerService = sellerService;
    }
    //通過用戶名去拿數據庫中對象,
    @Override
    public UserDetails loadUserByUsername(String username) throws UsernameNotFoundException {
        System.out.println("經過了imp方法");
//        username是得到前端表單的用戶名
        //哪些用戶有登陸權限,
        List<GrantedAuthority> grant = new ArrayList<>();
        //添加用戶的角色信息,能夠去使用
        grant.add(new SimpleGrantedAuthority("ROLE_SELLER"));
        //username是控制框架規定的,其實就是實體類的seller_id
        Seller seller = sellerService.findOne(username);
//        若果不存在此用戶
        if (seller !=null && "1".equals(seller.getStatus())){
            //只有當審核通過的商家才能登陸,返回的user是你輸入的用戶名,密碼,角色,
                return new User(username,seller.getPassword(),grant);
        }else {
            return null;
        }
    }

  5、spring-security
  里面的細則,我上一篇博客有細說,大家可以回顧一下

<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" xmlns:dubbo="http://code.alibabatech.com/schema/dubbo" xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd http://code.alibabatech.com/schema/dubbo http://code.alibabatech.com/schema/dubbo/dubbo.xsd http://www.springframework.org/schema/security http://www.springframework.org/schema/security/spring-security.xsd"> <!-- 以下頁面不被攔截 --> <http pattern="/*.html" security="none"></http> <http pattern="/css/**" security="none"></http> <http pattern="/img/**" security="none"></http> <http pattern="/js/**" security="none"></http> <http pattern="/plugins/**" security="none"></http> <!--<http pattern="/seller/add.do" security="none"></http>--> <!-- 頁面攔截規則 --> <http use-expressions="false"> <intercept-url pattern="/**" access="ROLE_SELLER" /> <form-login login-page="/shoplogin.html" default-target-url="/admin/index.html" authentication-failure-url="/shoplogin.html" always-use-default-target="true"/> <csrf disabled="true"/> <headers> <frame-options policy="SAMEORIGIN"/> //角色信息 </headers> <logout/> </http> <!-- 認證管理器 --> <authentication-manager> <authentication-provider user-service-ref="userDetailService"> </authentication-provider> </authentication-manager> <!-- 應用dubbo--> <dubbo:application name="youlexuan-shop" /> <dubbo:registry address="zookeeper://192.168.200.128:2181"/> <dubbo:reference id="sellerService" interface="com.ghh.core.service.SellerService" > </dubbo:reference>
 
<!--自定義的配置類-->
  <beans:bean id="userDetailService" class="com.ghh.shop.service.UserDetailsServiceImpl"> 
    <beans:property name="sellerService" ref="sellerService"/> //ref引用dubbo中的sellerService
  </beans:bean>
</beans:beans>

 自定義配置類中指向自定義的UserDetailsServiceImpl類中,將后台返回的用戶名,密碼,角色信息,進行控制判斷


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