处理SQL异常

sky-common/src/main/java/com/sky/constant/MessageConstant.java

@@ -24,4 +24,5 @@ public class MessageConstant {
     public static final String ORDER_STATUS_ERROR = "订单状态错误";
     public static final String ORDER_NOT_FOUND = "订单不存在";
 
+    public static final String ALREADY_EXISTS = "已存在了";
 }

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 +27,21 @@ public class GlobalExceptionHandler {
         return Result.error(ex.getMessage());
     }
 
+    /**
+     * 处理SQL异常
+     * @param exception SQLIntegrityConstraintViolationException
+     * @return Result<String>
+     */
+    @ExceptionHandler
+    public Result<String> exceptionHandler(SQLIntegrityConstraintViolationException exception) {
+        String message = exception.getMessage();
+        if (message.contains("Duplicate entry")) {
+            String[] split = message.split(" ");
+            String username = split[2];
+            String msg = username + MessageConstant.ALREADY_EXISTS;
+            return Result.error(msg);
+        } else {
+            return Result.error(MessageConstant.UNKNOWN_ERROR);
+        }
+    }
 }