Shiro -- (九) 集成SSM框架

1.配置web.xml

 <!-- Shiro框架入口 -->
    <filter>
        <filter-name>shiroFilter</filter-name>
        <filter-class>org.springframework.web.filter.DelegatingFilterProxy</filter-class>
        <init-param>
            <param-name>targetFilterLifecycle</param-name>
            <param-value>true</param-value>
        </init-param>
    </filter>
 
    <filter-mapping>
        <filter-name>shiroFilter</filter-name>
        <url-pattern>/actions/*</url-pattern>
    </filter-mapping>

2.配置shiro.xml

<!-- 这个bean的id与web.xml中shiro相关配置保持一致 -->
    <bean id="shiroFilter" class="org.apache.shiro.spring.web.ShiroFilterFactoryBean">
        <property name="securityManager" ref="securityManager"/>
        <!-- 没认证后重定向的位置 -->
        <property name="loginUrl" value="/login.jsp"/>
        <!-- 登陆成功跳转的位置 -->
        <property name="successUrl" value="/home.jsp"/>
        <!-- 没有权限跳转的位置 -->
        <property name="unauthorizedUrl" value="/unauthorized.jsp"/>
        <!-- 拦截请求-->
        <property name="filterChainDefinitions">
            <value>
                <!-- 登陆请求不拦截 -->
                /actions/security/login = anon
                <!-- 访问admin相关的请求，须要认证，
                     且通过自定义拦截器permissionFilter，最后还须要coder权限-->
                /actions/admin/** = authc,permissionFilter,roles[coder]
                /actions/logout = logout
                /actions/** = authc
            </value>
        </property>
        <!-- 用户自定义的过滤器 -->
        <property name="filters">
            <map>
                <entry key="permissionFilter" value-ref="userAccessControlFilter"/>
                <!--<entry key="logout" value-ref="logoutFilter"/>-->
            </map>
        </property>
    </bean>

3.spring的配置文件中引入shiro.xml

 <!-- 导入shiro的配置文件 -->
    <import resource="shiro.xml"/>

4.自定义Realm和自定义拦截器

public class UserRealm extends AuthorizingRealm {

    @Autowired
    private UserService userService;

    /**
     * 强制重写的认证方法
     */
    @Override
    protected AuthenticationInfo doGetAuthenticationInfo(AuthenticationToken token)
            throws AuthenticationException {
        //还记得吗，token封装了客户端的账号密码，由Subject拉客并最终带到此处
        String clientUsername = (String) token.getPrincipal();
        //从数据库中查询账号密码
        String passwordFromDB = userService.findPasswordByName(clientUsername);
        if (passwordFromDB == null) {
            //若是根据用户输入的用户名，去数据库中没有查询到相关的密码
            throw new UnknownAccountException();
        }

        /**
         * 返回一个从数据库中查出来的的凭证。用户名为clientUsername，密码为passwordFromDB 。封装成当前返回值
         * 接下来shiro框架作的事情就很简单了。
         * 它会拿你的输入的token与当前返回的这个数据库凭证SimpleAuthenticationInfo对比一下
         * 看看是否是同样，若是用户的账号密码与数据库中查出来的数据同样，那么本次登陆成功
         * 不然就是你密码输入错误
         */
        return new SimpleAuthenticationInfo(clientUsername, passwordFromDB, "UserRealm");
    }

    //受权
    @Override
    protected AuthorizationInfo doGetAuthorizationInfo(PrincipalCollection principals) {
        String yourInputUsername = (String) principals.getPrimaryPrincipal();
        //构造一个受权凭证
        SimpleAuthorizationInfo info = new SimpleAuthorizationInfo();
        //经过你的用户名查询数据库，获得你的权限信息与角色信息。并存放到权限凭证中
        info.addRole(getYourRoleByUsernameFromDB(yourInputUsername));
        info.addStringPermissions(getYourPermissionByUsernameFromDB(yourInputUsername));
        //返回你的权限信息
        return info;
    }

    private String getYourRoleByUsernameFromDB(String username) {
        return "coder";
    }

    private List<String> getYourPermissionByUsernameFromDB(String username) {
        return Arrays.asList("code：insert", "code：update");
    }

}

@Component("userAccessControlFilter")
public final class UserAccessControlFilter extends AccessControlFilter {

    private static final Logger LOGGER = LoggerFactory.getLogger(UserAccessControlFilter.class);

    /**
     * 便是否容许访问，返回true表示容许.
     * 若是返回false，则进入本类的onAccessDenied方法中进行处理
     */
    @Override
    protected boolean isAccessAllowed(ServletRequest request, ServletResponse response, Object object)
            throws Exception {
        final Subject subject = SecurityUtils.getSubject();

        //判断用户是否进行过登陆认证，若是没通过认证则返回登陆页
        if (subject.getPrincipal() == null || !subject.isAuthenticated()) {
            return Boolean.FALSE;
        }

        final String requestURI = this.getPathWithinApplication(request);
        if (LOGGER.isDebugEnabled()) {
            LOGGER.debug("请求URL为:{}", requestURI);
        }
        final String requestHeader = ((HttpServletRequest) request).getHeader("Referer");

        //防盗链处理
        if (requestHeader == null || "".equals(requestHeader)) {
            return Boolean.FALSE;
        }

        //此处能够编写用于判断用户是否有相关权限的代码
        //subject.hasRole("须要的角色");
        //subject.isPermitted("须要的权限");
        return Boolean.TRUE;
    }

    /**
     * 若是返回true，则继续执行其它拦截器
     * 若是返回false，则表示拦截住本次请求，且在代码中规定处理方法为重定向到登陆页面
     */
    @Override
    protected boolean onAccessDenied(ServletRequest servletRequest, ServletResponse servletResponse)
            throws Exception {

        if (LOGGER.isDebugEnabled()) {
            LOGGER.debug("当前账号没有相应的权限!");
        }

        //重定向到登陆页面
        this.redirectToLogin(servletRequest, servletResponse);
        return Boolean.FALSE;
    }
}

5.login.jsp和Controller

<form action="<c:url value="/actions/security/login"/>" method="post">
    用户名<input type="text" name="username"><br>
    密码<input type="password" name="password"><br>
    <input type="submit" value="提交">
</form>

 @RequestMapping(value = "security/login", method = {RequestMethod.POST})
    public String login(@RequestParam("username") String userName, @RequestParam("password") String password) {
        //获取到Subject门面对象
        Subject subject = getSubject();
        try {
            //将用户数据交给Shiro框架去作
            //你能够在自定义Realm中的认证方法doGetAuthenticationInfo()处打个断点
            subject.login(new UsernamePasswordToken(userName, password));
        } catch (AuthenticationException exception) {
            if (!subject.isAuthenticated()) {
                //登陆失败
                return "fail";
            }
        }
        //登陆成功
        return "home";

    }

    @RequestMapping(value = "admin")
    public String enterAdmin() {
        //跳转到 web-inf/pages/admin.jsp页面
        return "admin";
    }

6.index。jsp

<a href="<c:url value="/actions/obtainAllUsers"/> ">测试超连接</a><br>
<a href="<c:url value="/actions/admin"/> ">进入管理员页面</a><br>
<a href="<c:url value="/actions/logout"/> ">退出</a>

 

 

 登录成功才能访问其余连接，不然一致都是login

 

 

 

 

 

 

https://github.com/1017020555/SSM-Shiro.git