这篇文章主要介绍了SpringBoot+SpringCloud实现登录用户信息在微服务之间的传递,文中通过示例代码介绍的非常详细,对大家的学习或者工作具有一定的参考学习价值,需要的朋友可以参考下
实现思路:
1:准备一个ThreadLocal变量,供线程之间共享。
2:每个微服务对所有过来的Feign调用进行过滤,然后从请求头中获取User用户信息,并存在ThreadLocal变量中。
3:每个微服务在使用FeignClient调用别的微服务时,先从ThreadLocal里面取出user信息,并放在request的请求头中。
4:封装为一个注解,在启动类上标记即可。
代码样例:
1:ThreadLocal工具类 :UserInfoContext
package com.test.domi.common.system;import com.test.domi.dao.UserInfo;public class UserInfoContext { private static ThreadLocal<UserInfo> userInfo = new ThreadLocal<UserInfo>(); public static String KEY_USERINFO_IN_HTTP_HEADER = "X-AUTO-FP-USERINFO"; public UserInfoContext() { } public static UserInfo getUser(){ return (UserInfo)userInfo.get(); } public static void setUser(UserInfo user){ userInfo.set(user); }}
2:准备承载用户信息的userInfo实体类(代码略)
3:编写拦截器 : TransmitUserInfoFeighClientIntercepter
package com.test.domi.config;import com.alibaba.fastjson.JSON;import com.test.domi.common.system.UserInfoContext;import com.test.domi.dao.UserInfo;import feign.RequestInterceptor;import feign.RequestTemplate;import org.slf4j.Logger;import org.slf4j.LoggerFactory;import java.io.UnsupportedEncodingException;import java.net.URLDecoder;public class TransmitUserInfoFeighClientIntercepter implements RequestInterceptor { private static final Logger log = LoggerFactory.getLogger(TransmitUserInfoFeighClientIntercepter.class); public TransmitUserInfoFeighClientIntercepter() { } @Override public void apply(RequestTemplate requestTemplate) { //从应用上下文中取出user信息,放入Feign的请求头中 UserInfo user = UserInfoContext.getUser(); if (user != null) { try { String userJson = JSON.toJSONString(user); requestTemplate.header("KEY_USERINFO_IN_HTTP_HEADER",new String[]{URLDecoder.decode(userJson,"UTF-8")}); } catch (UnsupportedEncodingException e) { log.error("用户信息设置错误",e); } } }}
4:编写过滤器:TransmitUserInfoFilter
package com.test.domi.config;import com.alibaba.fastjson.JSON;import com.test.domi.common.system.UserInfoContext;import com.test.domi.dao.UserInfo;import org.apache.commons.lang.StringUtils;import org.slf4j.Logger;import org.slf4j.LoggerFactory;import javax.servlet.*;import javax.servlet.http.HttpServletRequest;import java.io.IOException;import java.io.UnsupportedEncodingException;import java.net.URLDecoder;public class TransmitUserInfoFilter implements Filter { private static final Logger log = LoggerFactory.getLogger(TransmitUserInfoFeighClientIntercepter.class); public TransmitUserInfoFilter() { } @Override public void init(FilterConfig filterConfig) throws ServletException { } @Override public void doFilter(ServletRequest request, ServletResponse response, FilterChain chain) throws IOException, ServletException { this.initUserInfo((HttpServletRequest)request); chain.doFilter(request,response); } private void initUserInfo(HttpServletRequest request){ String userJson = request.getHeader("KEY_USERINFO_IN_HTTP_HEADER"); if (StringUtils.isNotBlank(userJson)) { try { userJson = URLDecoder.decode(userJson,"UTF-8"); UserInfo userInfo = (UserInfo) JSON.parseObject(userJson,UserInfo.class); //将UserInfo放入上下文中 UserInfoContext.setUser(userInfo); } catch (UnsupportedEncodingException e) { log.error("init userInfo error",e); } } } @Override public void destroy() { }}
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