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diff --git a/技术规范/Java后端开发规范.md b/技术规范/Java后端开发规范.md
index 4592580..14cf14f 100644
--- a/技术规范/Java后端开发规范.md
+++ b/技术规范/Java后端开发规范.md
@@ -222,7 +222,7 @@ f)修改的方法用`update`作前缀。
 1. 业务异常，由业务编码人员在ResultCode预先定义，根据业务逻辑进行设定，视作正常的功能返回（HTTP Status Code 200 OK）；
 2. 业务系统异常，影响业务正常运转的异常，均视为系统功能性异常。
 
-![Exception](../img/Exception.jpg)
+![Exception](../img/Exception.png)
 
 ### 异常处理原则
 
@@ -233,7 +233,7 @@ f)修改的方法用`update`作前缀。
 
 ### 异常处理的编码规范
 
-![Exception1](../img/Exception1.jpg)
+![Exception1](../img/Exception1.png)
 
 1. 后端编码不要捕获任何异常  
 不要在业务代码中编写捕获异常的代码, 即 dao、service、controller 层的所有的异常都全部抛出到上层；