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SpringSecurity的简单使用

顶哥说 2019-06-07
164

博客主页:https://www.cnblogs.com/dintalk/

  • 导入SpringSecurity坐标

  • 在web.xml中配置过滤器

  • 编写spring-securiy配置文件

  • 编写自定义认证提供者

  • 用户新增时加密密码

  • 配置页面的login和logout

  • 获取登录用户的信息


一.SpringSecurity简介

Spring Security是一个能够为基于Spring的企业应用系统提供声明式的安全访问控制解决方案的安全框架。它提供了一组可以在Spring应用上下文中配置的Bean,充分利用了Spring IoC,DI(控制反转Inversion of Control ,DI:Dependency Injection 依赖注入)和AOP(面向切面编程)功能,为应用系统提供声明式的安全访问控制功能,减少了为企业系统安全控制编写大量重复代码的工作。

如果要对Web资源进行保护,最好的办法莫过于Filter,要想对方法调用进行保护,最好的办法莫过于AOP。Spring security对Web资源的保护,就是靠Filter实现的。

二.SpringSecurity的使用

1.导入SpringSecurity的坐标

    <!-- SpringSecurity相关坐标 -->
    <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.在web.xml中配置过滤器

      <?xml version="1.0" encoding="UTF-8"?>
      <web-app xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
      xmlns="http://java.sun.com/xml/ns/javaee"
      xsi:schemaLocation="http://java.sun.com/xml/ns/javaee
      http://java.sun.com/xml/ns/javaee/web-app_2_5.xsd" version="2.5">
      <!-- 1.解决post乱码 -->
      <filter>
      <filter-name>CharacterEncodingFilter</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>
      <init-param>
      <param-name>forceEncoding</param-name>
      <param-value>true</param-value>
      </init-param>
      </filter>
      <filter-mapping>
      <filter-name>CharacterEncodingFilter</filter-name>
      <url-pattern>/*</url-pattern>
      </filter-mapping>


      <!-- 2.配置SpringMVC的前端控制器 -->
      <servlet>
      <servlet-name>springmvc</servlet-name>
      <servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>
      <!-- 指定加载的配置文件 ,通过参数contextConfigLocation加载-->
      <init-param>
      <param-name>contextConfigLocation</param-name>
      <param-value>classpath:spring/springmvc.xml</param-value>
      </init-param>
      </servlet>
      <servlet-mapping>
      <servlet-name>springmvc</servlet-name>
      <url-pattern>*.do</url-pattern>
      </servlet-mapping>


      <!-- 3.配置SpringSecurity的过滤器(以一当十) -->
      <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>
      </web-app>

      3.编写SpringSecurity的配置文件(spring-security.xml)

        <?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:dubbo="http://code.alibabatech.com/schema/dubbo"
        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.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">

        <!-- 1.配置页面的放行规则(不需要登录验证的资源) -->
        <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>


        <!-- 2.页面的拦截规则 -->
        <http use-expressions="false">
        <!-- 2.1当前用户必须有ROLE_USER的角色 才可以访问根目录及所属子目录的资源 -->
        <intercept-url pattern="/**" access="ROLE_USER"/>
        <!-- 2.2表单登陆,默认用户名和密码的name属性为:username和password,也可在这里配置 -->
        <form-login login-page="/shoplogin.html"
        default-target-url="/admin/index.html"
        authentication-failure-url="/shoplogin.html"
        always-use-default-target="true"/>
        <!-- 2.3关闭跨域攻击 -->
        <csrf disabled="true"/>


        <!-- 2.4为了解决frame框架访问问题默认是deny不允许访问,改成同一域下可以进行访问-->
        <headers>
        <frame-options policy="SAMEORIGIN"/>
        </headers>
        <!-- 2.5配置登出功能(页面注销连接到“/logout"即可完成退出到指定页面) -->
        <logout logout-success-url="/login.html"></logout>
        </http>

        <!-- 3.认证管理器 -->
        <authentication-manager>
        <!-- 3.1认证提供者:这里是写成固定的,也可以自定义 -->
        <authentication-provider>
        <user-service>
        <!-- 配置当前系统的用户 authorities该用户属于哪个角色:这里写成固定的 -->
        <user name="admin" password="123456" authorities="ROLE_USER"/>
        </user-service>
        </authentication-provider>
        <!-- 3.1认证提供者:这里是写成固定的,也可以自定义 -->
        <!-- ======================================================== -->
        <!-- 3.2通过自定义认证提供者,实现动态认证 -->
        <authentication-provider user-service-ref="userDetailService">
        <!-- 认证时,先对用户输入的密码加密再和数据库的对比 -->
        <password-encoder ref="bcryptEncoder"></password-encoder>
        </authentication-provider>
        <!-- 3.2通过自定义认证提供者,实现动态认证 -->
        </authentication-manager>

        <!-- 4.认证类:配置的方式进行注入 -->
        <beans:bean id="userDetailService" class="cn.dintalk.service.UserDetailsServiceImpl">
        <beans:property name="sellerService" ref="sellerService"></beans:property>
        </beans:bean>

        <!-- 5.引用dubbo 服务 -->
        <dubbo:application name="dintalk-shop-web" >
        <dubbo:registry address="zookeeper://192.168.88.130:2181"/>
        <!-- 5.1配置的方式注入sellerService -->
        <dubbo:reference id="sellerService" interface=
        "cn.dintalk.sellergoods.service.SellerService"></dubbo:reference>

        <!-- 6.配置密码加密方式 -->
        <beans:bean id="bcryptEncoder" class="org.springframework.security.crypto.bcrypt.BCryptPasswordEncoder"></beans:bean>
        </beans:beans>

        4.编写自定义认证提供者(如需自定义)

          import org.springframework.security.core.GrantedAuthority;
          import org.springframework.security.core.authority.SimpleGrantedAuthority;
          import org.springframework.security.core.userdetails.User;
          import org.springframework.security.core.userdetails.UserDetails;
          import org.springframework.security.core.userdetails.UserDetailsService;
          import org.springframework.security.core.userdetails.UsernameNotFoundException;
          /**
          * 用户的登录认证
          * @author Mr.song
          * @date 2019/06/06 12:26
          */
          public class UserDetailsServiceImpl implements UserDetailsService {


          /**
          * 提供set方法以注入sellerService
          */
          private SellerService sellerService;
          public void setSellerService(SellerService sellerService) {
          this.sellerService = sellerService;
          }


          @Override
          public UserDetails loadUserByUsername(String username) throws UsernameNotFoundException {
          //1.根据用户名查询数据库
          TbSeller seller = sellerService.findOne(username);
          //2.判断用户是否存在
          if (seller != null){
          //3.定义集合,封装用户的角色(这里角色少,写死.也可以从数据库查询)
          List<GrantedAuthority> grantedAuthorities = new ArrayList<>();
          grantedAuthorities.add(new SimpleGrantedAuthority("ROLE_USER"));
          if (seller.getStatus().equals("1")){//用户处于可以登录的状态
          return new User(username,seller.getPassword(),grantedAuthorities);
          }
          }
          //3.用户不存在,认证失败
          return null;
          }
          }

          5.用户新增时加密密码(如需加密)

            import org.springframework.security.crypto.bcrypt.BCryptPasswordEncoder;
            /**
            * 增加
            * @param seller
            * @return
            */
            @RequestMapping("/add")
            public Result add(@RequestBody TbSeller seller){
            try {
            //添加时进行密码的加密,登录时配置同样的加密器即可
            BCryptPasswordEncoder passwordEncoder = new BCryptPasswordEncoder();
            String newPws = passwordEncoder.encode(seller.getPassword());
            seller.setPassword(newPws);
            sellerService.add(seller);
            return new Result(true, "增加成功");
            } catch (Exception e) {
            e.printStackTrace();
            return new Result(false, "增加失败");
            }
            }

            6.配置页面的login和logout

              <!-- 1.login的配置要点:默认,登录框的name属性分别为username和password(也可在配置中修改)
              登录表单提交方式为post,登录链接为:/login-->
              <form method="post" id="loginform" action="/login">
              <input name="username" type="text" placeholder="邮箱/用户名/手机号">
              <input name="password" type="password" placeholder="请输入密码">
              <a onclick="document:loginform.submit()" target="_blank">登&nbsp;&nbsp;录</a>
              </form>


              <!-- 2.logout的配置要点:默认,退出链接为:/logout即可 -->
              <a href="/logout" >注销</a>

              7.获取登录用户的信息

                import org.springframework.security.core.context.SecurityContextHolder;
                ...
                /**
                * 获取用户登录名进行展示
                * @return
                */
                @RequestMapping("/showName")
                public Map showName(){
                //1.从认证处取得登录信息(除了username还可获取其他信息)
                String name = SecurityContextHolder.getContext().getAuthentication().getName();
                //2.构建Map并返回
                HashMap<String, String> map = new HashMap<>();
                map.put("name",name);
                return map;
                }


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