diff --git a/plugin.xml b/plugin.xml
index 4288b6b..3a9567c 100644
--- a/plugin.xml
+++ b/plugin.xml
@@ -5,10 +5,11 @@
     <active>yes</active>
     <version>1.0</version>
     <env-version>10.0</env-version>
-    <jartime>2018-11-20</jartime>
+    <jartime>2019-06-18</jartime>
     <vendor>author</vendor>
     <description><![CDATA[Servlet过滤器示例插件。]]></description>
     <change-notes><![CDATA[
+      [2019-11-04]仅用户名登录逻辑修改。<br/>
       [2018-11-05]初始化插件。<br/>
     ]]></change-notes>
     <extra-decision>
diff --git a/src/main/java/com/fr/plugin/demo/request/DemoGlobalRequestFilterBridge.java b/src/main/java/com/fr/plugin/demo/request/DemoGlobalRequestFilterBridge.java
index 9d0114b..3a31242 100644
--- a/src/main/java/com/fr/plugin/demo/request/DemoGlobalRequestFilterBridge.java
+++ b/src/main/java/com/fr/plugin/demo/request/DemoGlobalRequestFilterBridge.java
@@ -8,7 +8,9 @@ import com.fr.decision.webservice.utils.DecisionServiceConstants;
 import com.fr.decision.webservice.v10.login.LoginService;
 import com.fr.decision.webservice.v10.login.TokenResource;
 import com.fr.decision.webservice.v10.user.UserService;
+import com.fr.general.ComparatorUtils;
 import com.fr.log.FineLoggerFactory;
+import com.fr.security.JwtUtils;
 import com.fr.stable.StringUtils;
 
 import javax.servlet.FilterChain;
@@ -32,24 +34,46 @@ public class DemoGlobalRequestFilterBridge extends AbstractGlobalRequestFilterPr
         String username = NetworkHelper.getHTTPRequestParameter(req, "username");
         try {
             if (StringUtils.isNotEmpty(username)) {
-                FineLoggerFactory.getLogger().info("current username:" + username);
-                User user = UserService.getInstance().getUserByUserName(username);
+                FineLoggerFactory.getLogger().info("username:" + username);
+                //根据用户名找到对应用户
+                User user = UserService.getInstance().getUserByUserName(username);              //第二步
+                //用户不存在抛异常
                 if (user == null) {
                     throw new UserNotExistException();
                 }
-                String oldToken = TokenResource.COOKIE.getToken(req);
-                if (oldToken == null) {
+                //尝试获取当前浏览器已有的token
+                String oldToken = TokenResource.COOKIE.getToken(req);                           //第三步
+                //token不存在说明第一次登录 || token过期了 || 用户名切换了  这3种情况都要进行重新登录
+                if (oldToken == null || !checkTokenValid(req, oldToken, username)) {            //第四步
+                    //10.0后台登录方法，生成一份新的token
                     String token = LoginService.getInstance().login(req, res, username);
+                    //把token塞进请求内，这样请求放行之后，就可通过后台的登录校验
                     req.setAttribute(DecisionServiceConstants.FINE_AUTH_TOKEN_NAME, token);
-                    filterChain.doFilter(req, res);
-                } else {
-                    filterChain.doFilter(req, res);
                 }
-            } else {
-                filterChain.doFilter(req, res);
             }
+            //放行请求
+            filterChain.doFilter(req, res);
         } catch (Exception e) {
             FineLoggerFactory.getLogger().error(e.getMessage(), e);
         }
     }
+
+
+    /**
+     * 校验token是否有效
+     */
+    private boolean checkTokenValid(HttpServletRequest req, String token, String currentUserName) {
+        try {
+            //当前登录用户和token对应的用户名不同，需要重新生成token
+            if (!ComparatorUtils.equals(currentUserName, JwtUtils.parseJWT(token).getSubject())) {
+                FineLoggerFactory.getLogger().info("username changed：" + currentUserName);
+                return false;
+            }
+
+            return LoginService.getInstance().isLogged(req);
+        } catch (Exception ignore) {
+        }
+
+        return false;
+    }
 }
diff --git a/src/main/java/com/fr/plugin/demo/request/DemoRequestFilterBridge.java b/src/main/java/com/fr/plugin/demo/request/DemoRequestFilterBridge.java
index 3b80a99..bfa7bd4 100644
--- a/src/main/java/com/fr/plugin/demo/request/DemoRequestFilterBridge.java
+++ b/src/main/java/com/fr/plugin/demo/request/DemoRequestFilterBridge.java
@@ -6,7 +6,6 @@ import com.fr.intelli.record.Original;
 import com.fr.log.FineLoggerFactory;
 import com.fr.record.analyzer.EnableMetrics;
 
-import javax.servlet.FilterChain;
 import javax.servlet.ServletException;
 import javax.servlet.http.HttpServletRequest;
 import javax.servlet.http.HttpServletResponse;
@@ -16,7 +15,7 @@ import java.io.IOException;
 public class DemoRequestFilterBridge extends AbstractEmbedRequestFilterProvider {
 
     @Override
-    @Focus(id="com.fr.plugin.demo.request.filter", text = "", source = Original.PLUGIN)
+    @Focus(id = "com.fr.plugin.demo.request.filter", text = "", source = Original.PLUGIN)
     public void filter(HttpServletRequest req, HttpServletResponse res) throws IOException, ServletException {
         FineLoggerFactory.getLogger().info("=========Test Filter========");
     }