SpringSecurity 3.2入门（9）自定义权限控制代码实现

1、一个自定义的filter，必须包含authenticationManager,accessDecisionManager,securityMetadataSource三个属性，我们的所有控制将在这三个类中实现。

package cn.jxufe.core.security;

import java.io.IOException;

import javax.servlet.Filter;

import javax.servlet.FilterChain;

import javax.servlet.FilterConfig;

import javax.servlet.ServletException;

import javax.servlet.ServletRequest;

import javax.servlet.ServletResponse;

import org.slf4j.Logger;

import org.slf4j.LoggerFactory;

import org.springframework.security.access.SecurityMetadataSource;

import org.springframework.security.access.intercept.AbstractSecurityInterceptor;

import org.springframework.security.access.intercept.InterceptorStatusToken;

import org.springframework.security.web.FilterInvocation;

import org.springframework.security.web.access.intercept.FilterInvocationSecurityMetadataSource;

public class MySecurityFilter extends AbstractSecurityInterceptor implements

        Filter {

    protected Logger logger = LoggerFactory.getLogger(getClass());

    // 与applicationContext-security.xml里的myFilter的属性securityMetadataSource对应，

    // 其他的两个组件，已经在AbstractSecurityInterceptor定义

    private FilterInvocationSecurityMetadataSource securityMetadataSource;

    @Override

    public SecurityMetadataSource obtainSecurityMetadataSource() {

        return this.securityMetadataSource;

    }

    public void doFilter(ServletRequest request, ServletResponse response,

            FilterChain chain) throws IOException, ServletException {

        logger.debug("------------MyFilterSecurityInterceptor.doFilter()-----------开始拦截了....");

        FilterInvocation fi = new FilterInvocation(request, response, chain);

        invoke(fi);

    }

    private void invoke(FilterInvocation fi) throws IOException,

            ServletException {

        // object为FilterInvocation对象

        // 1.获取请求资源的权限

        // 执行Collection<ConfigAttribute> attributes =

        // SecurityMetadataSource.getAttributes(object);

        logger.debug("--------------用户发送请求--------------");

        InterceptorStatusToken token = null;

        token = super.beforeInvocation(fi);

        try {

            fi.getChain().doFilter(fi.getRequest(), fi.getResponse());

        }catch (Exception e) {

        }finally {

            super.afterInvocation(token, null);

        }

        logger.debug("------------MyFilterSecurityInterceptor.doFilter()-----------拦截结束了....");

    }

    public FilterInvocationSecurityMetadataSource getSecurityMetadataSource() {

        return securityMetadataSource;

    }

    public void setSecurityMetadataSource(

            FilterInvocationSecurityMetadataSource securityMetadataSource) {

        this.securityMetadataSource = securityMetadataSource;

    }

    public void init(FilterConfig arg0) throws ServletException {

        // TODO Auto-generated method stub

    }

    public void destroy() {

        // TODO Auto-generated method stub

    }

    public Class<? extends Object> getSecureObjectClass() {

        // 下面的MyAccessDecisionManager的supports方面必须放回true,否则会提醒类型错误

        return FilterInvocation.class;

    }

}

MySecurityFilter.java

2、用于启动时加载资源列表，还拥有判断是否拥有请求访问资源权限的方法。

package cn.jxufe.core.security;

import java.util.ArrayList;

import java.util.Collection;

import java.util.HashMap;

import java.util.HashSet;

import java.util.Iterator;

import java.util.List;

import java.util.Map;

import java.util.Set;

import java.util.Map.Entry;

import org.slf4j.Logger;

import org.slf4j.LoggerFactory;

import org.springframework.security.access.ConfigAttribute;

import org.springframework.security.access.SecurityConfig;

import org.springframework.security.web.FilterInvocation;

import org.springframework.security.web.access.intercept.FilterInvocationSecurityMetadataSource;

import org.springframework.util.AntPathMatcher;

import cn.jxufe.core.dao.BaseDao;

import cn.jxufe.core.entiry.Resource;

import cn.jxufe.core.entiry.Role;

public class MyFilterInvocationSecurityMetadataSource implements FilterInvocationSecurityMetadataSource {

    protected Logger logger = LoggerFactory.getLogger(getClass());

    private AntPathMatcher urlMatcher = new AntPathMatcher();  

    private static Map<String, Collection<ConfigAttribute>> resourceMap = null;

    private BaseDao baseDao;

    public BaseDao getBaseDao() {

        return baseDao;

    }

    public void setBaseDao(BaseDao baseDao) {

        this.baseDao = baseDao;

    }

    //由spring调用

    public MyFilterInvocationSecurityMetadataSource(BaseDao baseDao) {

        this.baseDao=baseDao;

        loadResourceDefine();

    }

    //加载所有资源

    private void loadResourceDefine() {

        logger.debug("容器启动(MySecurityMetadataSource：loadResourceDefine)");

        logger.debug("--------------开始加载系统资源与权限列表数据--------------");

           resourceMap = new HashMap<String,Collection<ConfigAttribute>>();

           String sql="select * from t_system_resource_info";

                List<Resource> resources = this.baseDao.findListBeanByArray(sql, Resource.class);

                for(Resource resource : resources){

                    Collection<ConfigAttribute> configAttributes = null;

                    ConfigAttribute configAttribute = new SecurityConfig(resource.getName());

                    if(resourceMap.containsKey(resource.getPath())){

                        configAttributes = resourceMap.get(resource.getPath());

                        configAttributes.add(configAttribute);

                    }else{

                        configAttributes = new ArrayList<ConfigAttribute>() ;

                        configAttributes.add(configAttribute);

                        resourceMap.put(resource.getPath(), configAttributes);

                    }

                }

                logger.debug("--------------系统资源与权限列表数据加载结束--------------");

    }

    /**

     *  根据请求的资源地址，获取它所拥有的权限

     */

    public Collection<ConfigAttribute> getAttributes(Object object) throws IllegalArgumentException {

         //获取请求的url地址

        String requestUrl = ((FilterInvocation) object).getRequestUrl();

        logger.debug("--------------取得请求资源所需权限(MySecurityMetadataSource:getAttributes)--------------");

        logger.debug("--------------请求地址为："+requestUrl+"--------------");

        Iterator<String> it = resourceMap.keySet().iterator();

            while(it.hasNext()){

                String _url = it.next();

                if(_url.indexOf("?")!=-1){

                    _url = _url.substring(0, _url.indexOf("?"));

                }

                if(urlMatcher.match(_url,requestUrl))

                    return resourceMap.get(_url);

            }

            return null; //如果是想做到没配的资源默认可以访问的话，那么就返回空或者NULL

            /**

             * 使用下面的写法代替return null;没配的资源则不可以访问，建议开发的时候还是用上面的为好。

             */

//            Collection<ConfigAttribute> returnCollection = new ArrayList<ConfigAttribute>();

//            returnCollection.add(new SecurityConfig("ROLE_NO_USER"));

//            return returnCollection;

    }

    public Collection<ConfigAttribute> getAllConfigAttributes() {

        Set<ConfigAttribute> allAttributes = new HashSet<ConfigAttribute>();

        for (Entry<String, Collection<ConfigAttribute>> entry : resourceMap.entrySet()) {

            allAttributes.addAll(entry.getValue());

        }

        logger.debug(allAttributes.toString());

        return allAttributes;

    }

    public Collection<ConfigAttribute> getConfigAttributes(String...value) {

        return SecurityConfig.createList(value);

    }

    public boolean supports(Class<?> clazz) {

        return true;

    }

}

MyFilterInvocationSecurityMetadataSource.java

3、访问决策器，决定某个用户具有的角色，是否有足够的权限去访问某个资源 ;做最终的访问控制决定。

package cn.jxufe.core.security;

import java.util.Collection;

import java.util.Iterator;

import org.slf4j.Logger;

import org.slf4j.LoggerFactory;

import org.springframework.security.access.AccessDecisionManager;

import org.springframework.security.access.AccessDeniedException;

import org.springframework.security.access.ConfigAttribute;

import org.springframework.security.authentication.InsufficientAuthenticationException;

import org.springframework.security.core.Authentication;

import org.springframework.security.core.GrantedAuthority;

public class MyAccessDecisionManager implements AccessDecisionManager {

    protected Logger logger = LoggerFactory.getLogger(getClass());

    /**

     *  认证用户是否具有权限访问该url地址

     *

     */

    public void decide(Authentication authentication, Object object, Collection<ConfigAttribute> configAttributes) throws AccessDeniedException, InsufficientAuthenticationException {

        logger.debug("--------------匹配用户拥有权限和请求权限(MyAccessDecisionManager:decide)--------------");

        logger.debug("--------------验证用户是否具有一定的权限--------------");

         if(configAttributes == null) {

            return;

        }

        //所请求的资源拥有的权限(一个资源对多个权限)

        Iterator<ConfigAttribute> iterator = configAttributes.iterator();

        while(iterator.hasNext()) {

            ConfigAttribute configAttribute = iterator.next();

            //访问所请求资源所需要的权限

            String needPermission = configAttribute.getAttribute();

            logger.debug("--------------访问所请求资源所需要的权限为 " + needPermission+"--------------");

            //用户所拥有的权限authentication

            for(GrantedAuthority ga : authentication.getAuthorities()) {

                if(needPermission.equals(ga.getAuthority())) {

                    logger.debug("--------------权限验证通过--------------");

                    return;

                }

            }

        }

        //没有权限让我们去捕捉

        logger.debug("--------------权限验证未通过--------------");

        throw new AccessDeniedException(" 没有权限访问！");

    }

    /**

     * 启动时候被AbstractSecurityInterceptor调用，决定AccessDecisionManager是否可以执行传递ConfigAttribute。

     */

    public boolean supports(ConfigAttribute attribute) {

//         System.out.println("MyAccessDescisionManager.supports()------------"+attribute.getAttribute());

        return true;

    }

      /**

     * 被安全拦截器实现调用，包含安全拦截器将显示的AccessDecisionManager支持安全对象的类型

     */

    public boolean supports(Class<?> clazz) {

        logger.debug("MyAccessDescisionManager.supports()--------------------------------");

        return true;

    }

}

MyAccessDecisionManager.java

4、验证登录信息。

package cn.jxufe.core.security;

import javax.servlet.http.HttpServletRequest;

import javax.servlet.http.HttpServletResponse;

import org.springframework.security.authentication.AuthenticationServiceException;

import org.springframework.security.authentication.BadCredentialsException;

import org.springframework.security.authentication.UsernamePasswordAuthenticationToken;

import org.springframework.security.core.Authentication;

import org.springframework.security.core.AuthenticationException;

import org.springframework.security.web.authentication.UsernamePasswordAuthenticationFilter;

import cn.jxufe.core.dao.BaseDao;

import cn.jxufe.core.entiry.User;

public class MyUsernamePasswordAuthenticationFilter extends UsernamePasswordAuthenticationFilter {

    private static final String USERNAME = "username";

    private static final String PASSWORD = "password";

    private static final String KAPTCHA = "kaptcha";

    private BaseDao baseDao;

    public BaseDao getBaseDao() {

        return baseDao;

    }

    public void setBaseDao(BaseDao baseDao) {

        this.baseDao = baseDao;

    }

    @Override

    public Authentication attemptAuthentication(HttpServletRequest request, HttpServletResponse response) throws AuthenticationException {

        if (!request.getMethod().equals("POST")) {

            throw new AuthenticationServiceException("Authentication method not supported: " + request.getMethod());

        }

        String username = obtainUsername(request);

        String password = obtainPassword(request);

        String kaptcha = obtainKaptcha(request);

        logger.debug("--------------用户：" + username +"正在登录---"+kaptcha+"-----------");

        // 验证码校验

        String kaptchaExpected = (String) request.getSession().getAttribute(com.google.code.kaptcha.Constants.KAPTCHA_SESSION_KEY);

        if(!kaptcha.equals(kaptchaExpected)){

            BadCredentialsException exception = new BadCredentialsException("验证码不匹配！");

            throw exception;

        }

        // 账号与密码校验

        username = username.trim();

        String sql="select * from t_system_user_info where username=? and password=?";

        Object[] args=new Object[]{ username, password };

        User users = (User) this.baseDao.findUniqueBeanByArray(sql, User.class, args);

        if (users == null || !users.getPassword().equals(password)) {

            BadCredentialsException exception = new BadCredentialsException("用户名或密码不匹配！");

            throw exception;

        }

        // 实现 Authentication

        UsernamePasswordAuthenticationToken authRequest = new UsernamePasswordAuthenticationToken(username, password);

        // 允许子类设置详细属性

        setDetails(request, authRequest);

        // 运行UserDetailsService的loadUserByUsername 再次封装Authentication

        return this.getAuthenticationManager().authenticate(authRequest);

    }

    @Override

    protected String obtainUsername(HttpServletRequest request) {

        Object obj = request.getParameter(USERNAME);

        return null == obj ? "" : obj.toString();

    }

    @Override

    protected String obtainPassword(HttpServletRequest request) {

        Object obj = request.getParameter(PASSWORD);

        return null == obj ? "" : obj.toString();

    }

    protected String obtainKaptcha(HttpServletRequest request) {

        Object obj = request.getParameter(KAPTCHA);

        return null == obj ? "" : obj.toString();

    }

    @Override

    protected void setDetails(HttpServletRequest request, UsernamePasswordAuthenticationToken authRequest) {

        super.setDetails(request, authRequest);

    }

}

MyUsernamePasswordAuthenticationFilter.java

5、登录成功后，根据用户名，返回一个Userdetail。

package cn.jxufe.core.security;

import java.util.HashSet;

import java.util.List;

import java.util.Map;

import java.util.Set;

import org.slf4j.Logger;

import org.slf4j.LoggerFactory;

import org.springframework.beans.factory.annotation.Autowired;

import org.springframework.dao.DataAccessException;

import org.springframework.jdbc.core.JdbcTemplate;

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;

import org.springframework.stereotype.Component;

import cn.jxufe.core.dao.BaseDao;

import cn.jxufe.core.entiry.Resource;

@Component("userDetailsService")

public class MyUserDetailsService implements UserDetailsService {

    protected Logger logger = LoggerFactory.getLogger(getClass());

    @Autowired

    private JdbcTemplate jdbcTemplate;

    @Autowired

    private BaseDao baseDao;

    //登录验证

    @Override

    public UserDetails loadUserByUsername(String username)

    throws UsernameNotFoundException, DataAccessException {

        logger.debug("------------验证并授权(MyUserDetailsServiceImpl:loadUserByUsername)------------");

        // 根据用户名获取帐户和权限信息

        String sql = "SELECT username,password,enabled,name rname " +

                "FROM t_system_user_info u,t_system_role_info r,t_system_user_role ur " +

                "WHERE u.id=ur.user_id AND r.id=ur.role_id AND username= ?";

        // 如果一个用户具有多个权限，连接查询会返回一个List

        List list =this.jdbcTemplate.queryForList(sql, new Object[] { username });

        // 取出帐户和权限信息填充到User中返回

        if (list == null || list.size() <= 0)

            // spring-security定义的异常

            throw new UsernameNotFoundException("用户不存在！");

        // 如果用户存在

        Map<String, Object> map = (Map<String, Object>) list.get(0);

        // 密码

        String password = (String) map.get("password");

        // 帐户是否可用

        boolean enabled = ((Integer) map.get("enabled") == 1);

        boolean accountNonExpired = true;

        boolean credentialsNonExpired = true;

        boolean accountNonLocked = true;

        // 帐户所具有的权限

        Set<GrantedAuthority> authSet = new HashSet<GrantedAuthority>();

        List<Resource> resources=this.getResourceByUsername(username);

        logger.debug("------------用户所拥有权限------------");

        for (int i=0;i<resources.size();i++) {

            GrantedAuthority authority = new SimpleGrantedAuthority(resources.get(i).getName());

            authSet.add(authority);

        }

        logger.debug("------------"+authSet.toString()+"------------");

        // spring-security提供的类

        User userdetail = new User(username, password, enabled, accountNonExpired, credentialsNonExpired, accountNonLocked, authSet);

        return userdetail;

    }

    private List<Resource> getResourceByUsername(String username){

        String sql ="SELECT * FROM t_system_resource_info WHERE id IN(" +

                "SELECT DISTINCT resource_id FROM t_system_authority_resource WHERE authority_id IN(" +

                "SELECT authority_id FROM t_system_role_authority WHERE role_id IN(" +

                "SELECT role_id FROM t_system_user_role WHERE user_id  =( " +

                "SELECT id FROM t_system_user_info WHERE username= ? ))))";

        List<Resource> list =this.baseDao.findListBeanByArray(sql, Resource.class, new Object[] { username });

        return list;

    }

}

MyUserDetailsService.java

6、配置信息

<?xml version="1.0" encoding="UTF-8"?>

<beans xmlns="http://www.springframework.org/schema/beans"

    xmlns:security="http://www.springframework.org/schema/security"

    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-3.2.xsd">

    <!-- 配置不过滤的资源（静态资源及登录相关） -->

    <security:http pattern="/**/*.css" security="none" />

    <security:http pattern="/**/*.js" security="none" />

    <security:http pattern="/**/*.jpg" security="none" />

    <security:http pattern="/**/*.jpeg" security="none" />

    <security:http pattern="/**/*.gif" security="none" />

    <security:http pattern="/**/*.png" security="none" />

    <security:http pattern="/favicon.ico" security="none" />

    <!-- 不过滤验证码 -->

    <security:http pattern="/captcha-image.htm" security="none" />

    <!-- 不过滤登录页面 -->

    <security:http pattern="/login.htm" security="none" />

    <security:http pattern="/login.jsp" security="none" />

    <!-- 不过滤首页 -->

    <security:http pattern="/index.htm" security="none" />

    <security:http pattern="/index.jsp" security="none" />

    <!-- 配置SpringSecurity的http安全服务 -->

    <!-- 使用了 use-expressions="true 则 需使用hasRole('ROLE_USER')-->

    <!-- 配置了auto-config="true"loginFilter报错，如果你没有自定义的登录页面，它就会跳转到security默认的登录页面中。 -->

    <security:http access-denied-page="/accessDenied.jsp" entry-point-ref="authenticationProcessingFilterEntryPoint">

        <security:session-management>

            <security:concurrency-control

                max-sessions="1" />

        </security:session-management>

        <!-- 检测失效的sessionId,session超时时，定位到另外一个URL -->

        <security:session-management

            invalid-session-url="/sessionTimeOut.jsp" />

        <!-- 配置登出信息，指定退出系统后，跳转页面 -->

        <security:logout logout-url="/logout"

            logout-success-url="/login.htm" invalidate-session="true" />

        <!-- 认证和授权 -->

        <security:custom-filter ref="myLoginFilter" position="FORM_LOGIN_FILTER"  />

        <security:custom-filter ref="securityFilter" before="FILTER_SECURITY_INTERCEPTOR"/>

    </security:http>

    <!-- 认证管理器，配置SpringSecutiry的权限信息 -->

    <security:authentication-manager>

        <security:authentication-provider>

            <!-- 使用数据库中的用户名和密码 -->

            <security:jdbc-user-service

                data-source-ref="dataSource" />

        </security:authentication-provider>

    </security:authentication-manager>

    <!-- 验证配置 ， 认证管理器，实现用户认证的入口，主要实现UserDetailsService接口即可 -->

    <security:authentication-manager alias="myAuthenticationManager">

        <!-- 使用自己数据库中的用户和角色表,获取用户拥有的权限 -->

        <security:authentication-provider

            user-service-ref="myUserDetailsServiceImpl" />

    </security:authentication-manager>

    <!-- 登录验证器 -->

    <bean id="myLoginFilter"

        class="cn.jxufe.core.security.MyUsernamePasswordAuthenticationFilter">

        <!-- 处理登录 -->

        <property name="filterProcessesUrl" value="/j_spring_security_check"></property>

        <property name="usernameParameter" value="username"></property>

        <property name="passwordParameter" value="password"></property>

        <property name="authenticationSuccessHandler" ref="loginLogAuthenticationSuccessHandler"></property>

        <property name="authenticationFailureHandler" ref="simpleUrlAuthenticationFailureHandler"></property>

        <property name="authenticationManager" ref="myAuthenticationManager"></property>

        <property name="baseDao" ref="baseDao"></property>

    </bean>

    <bean id="loginLogAuthenticationSuccessHandler"

        class="org.springframework.security.web.authentication.SavedRequestAwareAuthenticationSuccessHandler">

        <property name="defaultTargetUrl" value="/index.jsp"></property>

    </bean>

    <bean id="simpleUrlAuthenticationFailureHandler"

        class="org.springframework.security.web.authentication.SimpleUrlAuthenticationFailureHandler">

        <property name="defaultFailureUrl" value="/login.jsp"></property>

    </bean>

     <!-- 认证过滤器 -->

    <bean id="securityFilter" class="cn.jxufe.core.security.MySecurityFilter">

        <!-- 用户拥有的权限 -->

        <property name="authenticationManager" ref="myAuthenticationManager" />

        <!-- 用户是否拥有所请求资源的权限 -->

        <property name="accessDecisionManager" ref="myAccessDecisionManager" />

        <!-- 资源与权限对应关系 -->

        <property name="securityMetadataSource" ref="myFilterInvocationSecurityMetadataSource" />

    </bean>

    <bean id="myUserDetailsServiceImpl" class="cn.jxufe.core.security.MyUserDetailsService" />

    <bean id="myAccessDecisionManager" class="cn.jxufe.core.security.MyAccessDecisionManager"/>

    <bean id="myFilterInvocationSecurityMetadataSource" class="cn.jxufe.core.security.MyFilterInvocationSecurityMetadataSource">

        <constructor-arg name="baseDao" ref="baseDao" />

    </bean>

    <bean id="baseDao" class="cn.jxufe.core.dao.BaseDaoImpl" />

    <!-- 定义上下文返回的消息的国际化 -->

    <bean id="messageSource"

        class="org.springframework.context.support.ReloadableResourceBundleMessageSource">

        <property name="basename"

            value="classpath:org/springframework/seurity/messages_zh_CN" />

    </bean>

    <!-- 未登录的切入点 -->

    <bean id="authenticationProcessingFilterEntryPoint" class="org.springframework.security.web.authentication.LoginUrlAuthenticationEntryPoint">

        <property name="loginFormUrl" value="/login.jsp"/>

    </bean>

</beans>

（详细的拦截过程将会在下一章中学习）。

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