first commit

src/main/java/com/greenorange/promotion/exception/BusinessException.java

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+package com.greenorange.promotion.exception;
+
+
+import com.greenorange.promotion.common.ErrorCode;
+
+/**
+ * 自定义异常类
+ */
+@SuppressWarnings("all")
+public class BusinessException extends RuntimeException {
+
+    /**
+     * 错误码
+     */
+    private final int code;
+
+    public BusinessException(int code, String message) {
+        super(message);
+        this.code = code;
+    }
+
+    public BusinessException(ErrorCode errorCode) {
+        super(errorCode.getMessage());
+        this.code = errorCode.getCode();
+    }
+
+    public BusinessException(ErrorCode errorCode, String message) {
+        super(message);
+        this.code = errorCode.getCode();
+    }
+
+    public int getCode() {
+        return code;
+    }
+
+}

src/main/java/com/greenorange/promotion/exception/GlobalExceptionHandler.java

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+package com.greenorange.promotion.exception;
+
+import com.greenorange.promotion.common.BaseResponse;
+import com.greenorange.promotion.common.ErrorCode;
+import com.greenorange.promotion.common.ResultUtils;
+import io.swagger.v3.oas.annotations.Hidden;
+import lombok.extern.slf4j.Slf4j;
+import org.springframework.http.converter.HttpMessageNotReadableException;
+import org.springframework.web.bind.MethodArgumentNotValidException;
+import org.springframework.web.bind.annotation.ExceptionHandler;
+import org.springframework.web.bind.annotation.RestControllerAdvice;
+
+/**
+ * 全局异常处理器
+ */
+@Slf4j
+@Hidden
+@RestControllerAdvice
+public class GlobalExceptionHandler {
+
+
+    // 处理参数绑定失败的异常
+    @ExceptionHandler(MethodArgumentNotValidException.class)
+    public BaseResponse<?> handleMethodArgumentNotValidException(MethodArgumentNotValidException e) {
+        log.error("MethodArgumentNotValidException", e);
+        return ResultUtils.error(ErrorCode.PARAMS_ERROR, "参数验证失败");
+    }
+
+    // 处理消息体解析失败的异常
+    @ExceptionHandler(HttpMessageNotReadableException.class)
+    public BaseResponse<?> handleHttpMessageNotReadableException(HttpMessageNotReadableException e) {
+        log.error("HttpMessageNotReadableException", e);
+        return ResultUtils.error(ErrorCode.PARAMS_ERROR, "请求参数不正确");
+    }
+
+
+    @ExceptionHandler(BusinessException.class)
+    public BaseResponse<?> businessExceptionHandler(BusinessException e) {
+        log.error("BusinessException", e);
+        return ResultUtils.error(e.getCode(), e.getMessage());
+    }
+
+
+    @ExceptionHandler(RuntimeException.class)
+    public BaseResponse<?> runtimeExceptionHandler(RuntimeException e) {
+        log.error("RuntimeException", e);
+        return ResultUtils.error(ErrorCode.SYSTEM_ERROR, "系统错误");
+    }
+
+}

src/main/java/com/greenorange/promotion/exception/ThrowUtils.java

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+package com.greenorange.promotion.exception;
+
+
+import com.greenorange.promotion.common.ErrorCode;
+
+/**
+ * 抛异常工具类
+ */
+@SuppressWarnings("all")
+public class ThrowUtils {
+
+    /**
+     * 条件成立则抛异常
+     *
+     * @param condition 条件
+     * @param runtimeException 运行时异常
+     */
+    public static void throwIf(boolean condition, RuntimeException runtimeException) {
+        if (condition) {
+            throw runtimeException;
+        }
+    }
+
+    /**
+     * 条件成立则抛异常
+     *
+     * @param condition 条件
+     * @param errorCode 自定义异常
+     */
+    public static void throwIf(boolean condition, ErrorCode errorCode) {
+        throwIf(condition, new BusinessException(errorCode));
+    }
+
+    /**
+     * 条件成立则抛异常
+     *
+     * @param condition 条件
+     * @param errorCode 自定义异常
+     * @param message 报错信息
+     */
+    public static void throwIf(boolean condition, ErrorCode errorCode, String message) {
+        throwIf(condition, new BusinessException(errorCode, message));
+    }
+}