springboot shiro 前后端分离，解决跨域、过虑options请求、shiro管理session问题、模拟跨域请求

import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.stereotype.Component;

import javax.servlet.*;
import javax.servlet.annotation.WebFilter;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import java.io.IOException;

@Component
@WebFilter(filterName = "SimpleCORSFilter",urlPatterns ="/*" )
public class SimpleCORSFilter implements Filter {

    private static final Logger logger = LoggerFactory.getLogger(SimpleCORSFilter.class);
    @Override
    public void doFilter(ServletRequest request, ServletResponse response, FilterChain chain)
            throws IOException, ServletException {

        HttpServletRequest httpServletRequest = (HttpServletRequest) request;
        HttpServletResponse httpServletResponse = (HttpServletResponse) response;
        logger.info("请求拦截："+ ((HttpServletRequest) request).getRequestURI());
        /*
         *  设置允许跨域请求
         */
        httpServletResponse.setHeader("Access-Control-Allow-Headers", "content-type, accept");
        httpServletResponse.setHeader("Access-Control-Allow-Methods", "POST");
        httpServletResponse.setStatus(200);
        httpServletResponse.setContentType("text/plain;charset=utf-8");
        httpServletResponse.setCharacterEncoding("utf-8");
        httpServletResponse.setHeader("Access-Control-Allow-Origin", "*");
        httpServletResponse.setHeader("Access-Control-Allow-Methods", "POST, GET, OPTIONS, DELETE");
        httpServletResponse.setHeader("Access-Control-Max-Age", "0");
        httpServletResponse.setHeader("Access-Control-Allow-Headers",
                "Origin, No-Cache, X-Requested-With, If-Modified-Since, Pragma, Last-Modified, Cache-Control, Expires, Content-Type, X-E4M-With,userId,token,WG-Token, Authorization");
        httpServletResponse.setHeader("Access-Control-Allow-Credentials", "true");
        httpServletResponse.setHeader("XDomainRequestAllowed", "1");

         /*
            过虑 OPTIONS 请求
         */
        String type = httpServletRequest.getMethod();
        if (type.toUpperCase().equals("OPTIONS")) {
            return;
        }

        chain.doFilter(request, response);
    }

    @Override
    public void init(FilterConfig filterConfig) throws ServletException {
//        String isCrossStr = filterConfig.getInitParameter("IsCross");
//        isCross = isCrossStr.equals("true") ? true : false;
//        System.out.println(isCrossStr);
    }
    @Override
    public void destroy() {
//        isCross = false;
    }

}

Map<String, Filter> filterMap = new LinkedHashMap<String, Filter>();
        filterMap.put("/sys/*",new SimpleCORSFilter()); // SimpleCORSFilter 为步骤1中创建的类 
        shiroFilterFactoryBean.setFilters(filterMap);
        Map<String, String> filterChainDefinitionMap = new LinkedHashMap<String, String>();
        filterChainDefinitionMap.put("/static/**", "anon");
        filterChainDefinitionMap.put("/index.html*", "anon");
        //anon下不需要认证
        filterChainDefinitionMap.put("/anon/**", "anon");
        filterChainDefinitionMap.put("/loginSys", "anon");
        filterChainDefinitionMap.put("/index", "anon");
        filterChainDefinitionMap.put("/back", "anon");
        filterChainDefinitionMap.put("/sys/**", "authc");
        shiroFilterFactoryBean.setFilterChainDefinitionMap(filterChainDefinitionMap);

import org.apache.shiro.web.servlet.ShiroHttpServletRequest;
import org.apache.shiro.web.session.mgt.DefaultWebSessionManager;
import org.apache.shiro.web.util.WebUtils;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

import javax.servlet.ServletRequest;
import javax.servlet.ServletResponse;
import javax.servlet.http.HttpServletRequest;
import java.io.Serializable;


public class SessionManager extends DefaultWebSessionManager {
    private static final Logger log = LoggerFactory.getLogger(DefaultWebSessionManager.class);
    private String authorization = "Authorization";

    /**
     * 重写获取sessionId的方法调用当前Manager的获取方法
     *
     * @param request
     * @param response
     * @return
     */
    @Override
    protected Serializable getSessionId(ServletRequest request, ServletResponse response) {
        return this.getReferencedSessionId(request, response);
    }

    /**
     * 获取sessionId从请求中
     *
     * @param request
     * @param response
     * @return
     */
    private Serializable getReferencedSessionId(ServletRequest request, ServletResponse response) {
        String id = this.getSessionIdCookieValue(request, response);
        if (id != null) {
            request.setAttribute(ShiroHttpServletRequest.REFERENCED_SESSION_ID_SOURCE, "cookie");
        } else {
            id = this.getUriPathSegmentParamValue(request, "JSESSIONID");
            if (id == null) {
                // 获取请求头中的session
                id = WebUtils.toHttp(request).getHeader(this.authorization);
                if (id == null) {
                    String name = this.getSessionIdName();
                    id = request.getParameter(name);
                    if (id == null) {
                        id = request.getParameter(name.toLowerCase());
                    }
                }
            }
            if (id != null) {
                request.setAttribute(ShiroHttpServletRequest.REFERENCED_SESSION_ID_SOURCE, "url");
            }
        }

        if (id != null) {
            request.setAttribute(ShiroHttpServletRequest.REFERENCED_SESSION_ID, id);
            request.setAttribute(ShiroHttpServletRequest.REFERENCED_SESSION_ID_IS_VALID, Boolean.TRUE);
        }

        return id;
    }

    // copy from super class
    private String getSessionIdCookieValue(ServletRequest request, ServletResponse response) {
        if (!this.isSessionIdCookieEnabled()) {
            log.debug("Session ID cookie is disabled - session id will not be acquired from a request cookie.");
            return null;
        } else if (!(request instanceof HttpServletRequest)) {
            log.debug("Current request is not an HttpServletRequest - cannot get session ID cookie.  Returning null.");
            return null;
        } else {
            HttpServletRequest httpRequest = (HttpServletRequest) request;
            return this.getSessionIdCookie().readValue(httpRequest, WebUtils.toHttp(response));
        }
    }

    // copy from super class
    private String getUriPathSegmentParamValue(ServletRequest servletRequest, String paramName) {
        if (!(servletRequest instanceof HttpServletRequest)) {
            return null;
        } else {
            HttpServletRequest request = (HttpServletRequest) servletRequest;
            String uri = request.getRequestURI();
            if (uri == null) {
                return null;
            } else {
                int queryStartIndex = uri.indexOf(63);
                if (queryStartIndex >= 0) {
                    uri = uri.substring(0, queryStartIndex);
                }

                int index = uri.indexOf(59);
                if (index < 0) {
                    return null;
                } else {
                    String TOKEN = paramName + "=";
                    uri = uri.substring(index + 1);
                    index = uri.lastIndexOf(TOKEN);
                    if (index < 0) {
                        return null;
                    } else {
                        uri = uri.substring(index + TOKEN.length());
                        index = uri.indexOf(59);
                        if (index >= 0) {
                            uri = uri.substring(0, index);
                        }

                        return uri;
                    }
                }
            }
        }
    }

    // copy from super class
    private String getSessionIdName() {
        String name = this.getSessionIdCookie() != null ? this.getSessionIdCookie().getName() : null;
        if (name == null) {
            name = "JSESSIONID";
        }

        return name;
    }
}

@Bean
public SecurityManager securityManager(MyRealm myRealm) {
    DefaultWebSecurityManager securityManager = new DefaultWebSecurityManager();
    securityManager.setRealm(myRealm);
    securityManager.setSessionManager(sessionManager());
    return securityManager;
}

  @Bean("sessionManager")
  public SessionManager sessionManager(){
      SessionManager manager = new SessionManager();  // SessionManager 为步骤1中创建的 SessionManager
/*使用了shiro自带缓存，
如果设置 redis为缓存需要重写CacheManager（其中需要重写Cache）
manager.setCacheManager(this.RedisCacheManager());*/
      manager.setSessionDAO(new EnterpriseCacheSessionDAO());
      return manager;
  }

@ResponseBody
@RequestMapping(value = "/login", method = RequestMethod.POST, produces = "application/json;charset=utf-8")
public String login(
@RequestParam(required = false) String username,
@RequestParam(required = false) String password
) {

JSONObject jsonObject = new JSONObject();
Subject subject = SecurityUtils.getSubject();
password = MD5Tools.MD5(password);
UsernamePasswordToken token = new UsernamePasswordToken(username, password);

try {
// 登录，即身份验证
    subject.login(token);
    onlineSessionManager.addOnlineSession(subject.getSession().getId());
    User user = userService.getUserByLoginName(token.getUsername());
        // 在session中存放用户信息
    subject.getSession().setAttribute("userLogin", user);
    jsonObject.put("error", 0);
    jsonObject.put("msg", "登录成功");
    // 返回sessionId
    jsonObject.put("sessionId",subject.getSession().getId());
} catch (IncorrectCredentialsException e) {
throw new JsonException("用户名或密码错误", 405);
} catch (LockedAccountException e) {
throw new JsonException("登录失败，该用户已被冻结", 405);
} catch (AuthenticationException e) {
throw new JsonException("用户名或密码错误", 405);
}
return jsonObject.toString();
}

        $.ajax({
            type:‘post‘,
            url:‘http://192.168.1.31:8080/login‘,
            data:‘{"username":"admin","password":"admin"}‘,
            contentType: "application/json", //提交数据类型
            dataType:‘json‘,
            success:function(data){
                console.log(data);
                var sessionId = data.data.sessionId; //登录成功后返回的sessionId
                $.ajax({
                    type:‘post‘,
                    url:‘http://192.168.1.31:8080/sys/noticeNews/selectList‘,
                    data:‘{"pageNum":"1","pageSize":"10","verify":"2"}‘,
                    contentType: "application/json", //提交数据类型
                    headers: {
                        "Authorization": sessionId,  // Authorization 为重定的SessionManager类中定义的属性
                        "Content-Type":"application/json;charset=utf8"
                    },
                    dataType:‘json‘,
                    crossDomain: true,
                    success:function(data){
                        console.log(data);
                    },
                    error:function (msg){
                        console.log(msg);
                    }
                });
            },
            error:function (msg){
                console.log(msg);
                layer.msg("用户名或密码错误");
            }
        });

package com.sx.ucenter.shiro;

import com.sx.common.util.SimpleCORSFilter;
import com.sx.ucenter.filter.SysFilter;
import org.apache.shiro.cache.ehcache.EhCacheManager;
import org.apache.shiro.mgt.SecurityManager;
import org.apache.shiro.session.mgt.eis.EnterpriseCacheSessionDAO;
import org.apache.shiro.spring.security.interceptor.AuthorizationAttributeSourceAdvisor;
import org.apache.shiro.spring.web.ShiroFilterFactoryBean;
import org.apache.shiro.web.mgt.DefaultWebSecurityManager;
import org.springframework.aop.framework.autoproxy.DefaultAdvisorAutoProxyCreator;
import org.springframework.boot.autoconfigure.condition.ConditionalOnMissingBean;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;

import javax.servlet.Filter;
import java.util.LinkedHashMap;
import java.util.Map;

@Configuration
public class ShiroConfig {

    //将自己的验证方式加入容器
    @Bean
    public MyRealm myShiroRealm(EhCacheManager ehCacheManager) {
        MyRealm myRealm = new MyRealm();
        return myRealm;
    }

    //权限管理，配置主要是Realm的管理认证
    @Bean
    public SecurityManager securityManager(MyRealm myRealm) {
        DefaultWebSecurityManager securityManager = new DefaultWebSecurityManager();
        securityManager.setRealm(myRealm);
        securityManager.setSessionManager(sessionManager());
      return securityManager;
    }

//Filter工厂，设置对应的过滤条件和跳转条件
    @Bean
    public ShiroFilterFactoryBean shiroFilterFactoryBean(SecurityManager securityManager) {
        ShiroFilterFactoryBean shiroFilterFactoryBean = new ShiroFilterFactoryBean();
        shiroFilterFactoryBean.setSecurityManager(securityManager);
        Map<String, String> map = new LinkedHashMap<>();

        /*
         *常用的过滤器如下：
         *anon：所有用户可访问，通常作为指定页面的静态资源时使用
         *authc：所有已登陆用户可访问
         *roles：有指定角色的用户可访问，通过[ ]指定具体角色，这里的角色名称与数据库中配置一致
         *perms：有指定权限的用户可访问，通过[ ]指定具体权限，这里的权限名称与数据库中配置一致
         */
//        //配置shiro默认登录界面地址，前后端分离中登录界面跳转应由前端路由控制，后台仅返回json数据
//        shiroFilterFactoryBean.setLoginUrl("/unauth");


        /*跨域请求设置 start  */
        Map<String, Filter> filterMap = new LinkedHashMap<String, Filter>();
//        filterMap.put("authc",new SimpleCORSFilter());
        filterMap.put("/sys/*",new SimpleCORSFilter());
        shiroFilterFactoryBean.setFilters(filterMap);
        Map<String, String> filterChainDefinitionMap = new LinkedHashMap<String, String>();
        filterChainDefinitionMap.put("/static/**", "anon");
        filterChainDefinitionMap.put("/index.html*", "anon");
        //anon下不需要认证
        filterChainDefinitionMap.put("/anon/**", "anon");
        filterChainDefinitionMap.put("/loginSys", "anon");
        filterChainDefinitionMap.put("/index", "anon");
        filterChainDefinitionMap.put("/back", "anon");
        filterChainDefinitionMap.put("/sys/**", "authc");
//        filterChainDefinitionMap.put("/**", "anon");
        shiroFilterFactoryBean.setFilterChainDefinitionMap(filterChainDefinitionMap);
        /*跨域请求设置 end  */

        //登录
        shiroFilterFactoryBean.setLoginUrl("/login");
        //首页
        shiroFilterFactoryBean.setSuccessUrl("/index");
        //开放匿名访问
        //错误页面，认证不通过跳转
        shiroFilterFactoryBean.setUnauthorizedUrl("/error");

        return shiroFilterFactoryBean;
    }

    /*
     * 设置session
     */
    @Bean("sessionManager")
    public SessionManager sessionManager(){
        SessionManager manager = new SessionManager();
        /*使用了shiro自带缓存，
        如果设置 redis为缓存需要重写CacheManager（其中需要重写Cache）
        manager.setCacheManager(this.RedisCacheManager());*/
        manager.setSessionDAO(new EnterpriseCacheSessionDAO());
        return manager;
    }

    //加入注解的使用，不加入这个注解不生效
    @Bean
    public AuthorizationAttributeSourceAdvisor authorizationAttributeSourceAdvisor(SecurityManager securityManager) {
        AuthorizationAttributeSourceAdvisor authorizationAttributeSourceAdvisor = new AuthorizationAttributeSourceAdvisor();
        authorizationAttributeSourceAdvisor.setSecurityManager(securityManager);
        return authorizationAttributeSourceAdvisor;
    }
}