diff --git a/sky-common/src/main/java/com/sky/constant/MessageConstant.java b/sky-common/src/main/java/com/sky/constant/MessageConstant.java
index c6b645d..4af1974 100644
--- a/sky-common/src/main/java/com/sky/constant/MessageConstant.java
+++ b/sky-common/src/main/java/com/sky/constant/MessageConstant.java
@@ -6,6 +6,7 @@ package com.sky.constant;
 public class MessageConstant {
 
     public static final String PASSWORD_ERROR = "密码错误";
+    public static final String ALEADY_EXIST = "已经存在";
     public static final String ACCOUNT_NOT_FOUND = "账号不存在";
     public static final String ACCOUNT_LOCKED = "账号被锁定";
     public static final String UNKNOWN_ERROR = "未知错误";
diff --git a/sky-server/src/main/java/com/sky/handler/GlobalExceptionHandler.java b/sky-server/src/main/java/com/sky/handler/GlobalExceptionHandler.java
index 1a48598..ff51ff5 100644
--- a/sky-server/src/main/java/com/sky/handler/GlobalExceptionHandler.java
+++ b/sky-server/src/main/java/com/sky/handler/GlobalExceptionHandler.java
@@ -1,11 +1,14 @@
 package com.sky.handler;
 
+import com.sky.constant.MessageConstant;
 import com.sky.exception.BaseException;
 import com.sky.result.Result;
 import lombok.extern.slf4j.Slf4j;
 import org.springframework.web.bind.annotation.ExceptionHandler;
 import org.springframework.web.bind.annotation.RestControllerAdvice;
 
+import java.sql.SQLIntegrityConstraintViolationException;
+
 /**
  * 全局异常处理器，处理项目中抛出的业务异常
  */
@@ -24,4 +27,28 @@ public class GlobalExceptionHandler {
         return Result.error(ex.getMessage());
     }
 
+
+    /**
+     * 捕获系统级的数据库异常
+     * @param ex
+     * @return
+     */
+    @ExceptionHandler
+    public Result exceptionHandler(SQLIntegrityConstraintViolationException ex){
+        //Duplicate entry 'lisi' for key 'idx_username'
+        String message = ex.getMessage();
+        log.error("异常信息：{}",message );
+        //动态获取错误数据
+        if (message.contains("Duplicate entry")) {
+            String[] msgs = message.split(" ");
+            String username = msgs[2];
+//            String msg = username + "已经存在";
+            String msg = username + MessageConstant.ALEADY_EXIST;
+            return Result.error(msg);
+        }
+
+//        return Result.error(ex.getMessage());
+        return Result.error(MessageConstant.UNKNOWN_ERROR);
+    }
+
 }