后端功能增强：全局异常处理、API控制器、JSP视图和单元测试
- 添加 GlobalExceptionHandler 全局异常处理 - 添加 ApiController REST API 控制器 - 更新 WebConfig 跨域配置和 ProductRepository 查询方法 - 新增 monitor/product-detail/profile JSP 视图页面 - 添加 FlashSaleServiceTest 秒杀服务单元测试 - 更新 application.yml 配置
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package com.org.flashsalesystem.config;
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import lombok.extern.slf4j.Slf4j;
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import org.springframework.http.HttpStatus;
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import org.springframework.http.ResponseEntity;
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import org.springframework.validation.BindException;
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import org.springframework.validation.ObjectError;
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import org.springframework.web.bind.MethodArgumentNotValidException;
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import org.springframework.web.bind.annotation.ExceptionHandler;
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import org.springframework.web.bind.annotation.RestControllerAdvice;
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import javax.servlet.http.HttpServletRequest;
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import javax.validation.ConstraintViolation;
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import javax.validation.ConstraintViolationException;
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import java.time.LocalDateTime;
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import java.util.HashMap;
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import java.util.Map;
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import java.util.Set;
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import java.util.concurrent.TimeoutException;
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/**
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* 全局异常处理器
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* 统一处理应用中的各种异常，提供一致的错误响应格式
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*/
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@RestControllerAdvice
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@Slf4j
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public class GlobalExceptionHandler {
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/**
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* 业务异常处理
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*/
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@ExceptionHandler(BusinessException.class)
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public ResponseEntity<ErrorResponse> handleBusinessException(BusinessException e, HttpServletRequest request) {
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log.warn("业务异常: {} - {}", e.getErrorCode(), e.getMessage(), e);
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ErrorResponse errorResponse = ErrorResponse.builder()
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.timestamp(LocalDateTime.now())
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.status(HttpStatus.BAD_REQUEST.value())
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.error("Business Error")
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.message(e.getMessage())
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.errorCode(e.getErrorCode())
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.path(request.getRequestURI())
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.build();
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return ResponseEntity.badRequest().body(errorResponse);
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}
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/**
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* 秒杀相关异常处理
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*/
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@ExceptionHandler(FlashSaleException.class)
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public ResponseEntity<ErrorResponse> handleFlashSaleException(FlashSaleException e, HttpServletRequest request) {
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log.warn("秒杀异常: {} - {}", e.getErrorCode(), e.getMessage(), e);
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ErrorResponse errorResponse = ErrorResponse.builder()
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.timestamp(LocalDateTime.now())
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.status(HttpStatus.BAD_REQUEST.value())
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.error("Flash Sale Error")
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.message(e.getMessage())
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.errorCode(e.getErrorCode())
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.path(request.getRequestURI())
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.build();
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return ResponseEntity.badRequest().body(errorResponse);
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}
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/**
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* 限流异常处理
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*/
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@ExceptionHandler(RateLimitException.class)
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public ResponseEntity<ErrorResponse> handleRateLimitException(RateLimitException e, HttpServletRequest request) {
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log.warn("限流异常: {}", e.getMessage(), e);
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ErrorResponse errorResponse = ErrorResponse.builder()
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.timestamp(LocalDateTime.now())
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.status(HttpStatus.TOO_MANY_REQUESTS.value())
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.error("Rate Limit Exceeded")
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.message(e.getMessage())
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.errorCode("RATE_LIMIT_EXCEEDED")
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.path(request.getRequestURI())
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.build();
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return ResponseEntity.status(HttpStatus.TOO_MANY_REQUESTS).body(errorResponse);
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}
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/**
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* 数据验证异常处理
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*/
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@ExceptionHandler(MethodArgumentNotValidException.class)
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public ResponseEntity<ErrorResponse> handleValidationException(MethodArgumentNotValidException e, HttpServletRequest request) {
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log.warn("数据验证异常: {}", e.getMessage());
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StringBuilder errorMessages = new StringBuilder();
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for (ObjectError error : e.getBindingResult().getAllErrors()) {
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if (errorMessages.length() > 0) {
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errorMessages.append("; ");
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}
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errorMessages.append(error.getDefaultMessage());
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}
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ErrorResponse errorResponse = ErrorResponse.builder()
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.timestamp(LocalDateTime.now())
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.status(HttpStatus.BAD_REQUEST.value())
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.error("Validation Error")
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.message(errorMessages.toString())
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.errorCode("VALIDATION_ERROR")
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.path(request.getRequestURI())
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.build();
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return ResponseEntity.badRequest().body(errorResponse);
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}
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/**
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* 参数绑定异常处理
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*/
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@ExceptionHandler(BindException.class)
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public ResponseEntity<ErrorResponse> handleBindException(BindException e, HttpServletRequest request) {
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log.warn("参数绑定异常: {}", e.getMessage());
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StringBuilder errorMessages = new StringBuilder();
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for (ObjectError error : e.getBindingResult().getAllErrors()) {
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if (errorMessages.length() > 0) {
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errorMessages.append("; ");
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}
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errorMessages.append(error.getDefaultMessage());
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}
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ErrorResponse errorResponse = ErrorResponse.builder()
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.timestamp(LocalDateTime.now())
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.status(HttpStatus.BAD_REQUEST.value())
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.error("Parameter Binding Error")
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.message(errorMessages.toString())
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.errorCode("BINDING_ERROR")
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.path(request.getRequestURI())
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.build();
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return ResponseEntity.badRequest().body(errorResponse);
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}
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/**
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* 约束违规异常处理
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*/
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@ExceptionHandler(ConstraintViolationException.class)
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public ResponseEntity<ErrorResponse> handleConstraintViolationException(ConstraintViolationException e, HttpServletRequest request) {
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log.warn("约束违规异常: {}", e.getMessage());
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StringBuilder errorMessages = new StringBuilder();
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Set<ConstraintViolation<?>> violations = e.getConstraintViolations();
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for (ConstraintViolation<?> violation : violations) {
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if (errorMessages.length() > 0) {
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errorMessages.append("; ");
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}
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errorMessages.append(violation.getMessage());
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}
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ErrorResponse errorResponse = ErrorResponse.builder()
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.timestamp(LocalDateTime.now())
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.status(HttpStatus.BAD_REQUEST.value())
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.error("Constraint Violation")
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.message(errorMessages.toString())
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.errorCode("CONSTRAINT_VIOLATION")
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.path(request.getRequestURI())
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.build();
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return ResponseEntity.badRequest().body(errorResponse);
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}
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/**
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* 超时异常处理
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*/
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@ExceptionHandler(TimeoutException.class)
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public ResponseEntity<ErrorResponse> handleTimeoutException(TimeoutException e, HttpServletRequest request) {
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log.error("超时异常: {}", e.getMessage(), e);
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ErrorResponse errorResponse = ErrorResponse.builder()
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.timestamp(LocalDateTime.now())
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.status(HttpStatus.REQUEST_TIMEOUT.value())
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.error("Timeout Error")
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.message("请求超时，请稍后重试")
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.errorCode("TIMEOUT_ERROR")
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.path(request.getRequestURI())
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.build();
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return ResponseEntity.status(HttpStatus.REQUEST_TIMEOUT).body(errorResponse);
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}
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/**
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* 非法参数异常处理
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*/
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@ExceptionHandler(IllegalArgumentException.class)
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public ResponseEntity<ErrorResponse> handleIllegalArgumentException(IllegalArgumentException e, HttpServletRequest request) {
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log.warn("非法参数异常: {}", e.getMessage(), e);
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ErrorResponse errorResponse = ErrorResponse.builder()
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.timestamp(LocalDateTime.now())
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.status(HttpStatus.BAD_REQUEST.value())
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.error("Illegal Argument")
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.message(e.getMessage())
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.errorCode("ILLEGAL_ARGUMENT")
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.path(request.getRequestURI())
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.build();
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return ResponseEntity.badRequest().body(errorResponse);
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}
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/**
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* 空指针异常处理
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*/
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@ExceptionHandler(NullPointerException.class)
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public ResponseEntity<ErrorResponse> handleNullPointerException(NullPointerException e, HttpServletRequest request) {
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log.error("空指针异常: {}", e.getMessage(), e);
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ErrorResponse errorResponse = ErrorResponse.builder()
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.timestamp(LocalDateTime.now())
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.status(HttpStatus.INTERNAL_SERVER_ERROR.value())
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.error("Null Pointer Error")
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.message("系统内部错误，请联系管理员")
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.errorCode("NULL_POINTER_ERROR")
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.path(request.getRequestURI())
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.build();
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return ResponseEntity.status(HttpStatus.INTERNAL_SERVER_ERROR).body(errorResponse);
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}
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/**
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* 运行时异常处理
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*/
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@ExceptionHandler(RuntimeException.class)
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public ResponseEntity<ErrorResponse> handleRuntimeException(RuntimeException e, HttpServletRequest request) {
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log.error("运行时异常: {}", e.getMessage(), e);
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// 对于已知的业务异常，使用友好的错误信息
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String message = e.getMessage();
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if (message == null || message.trim().isEmpty()) {
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message = "系统繁忙，请稍后重试";
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}
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ErrorResponse errorResponse = ErrorResponse.builder()
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.timestamp(LocalDateTime.now())
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.status(HttpStatus.INTERNAL_SERVER_ERROR.value())
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.error("Runtime Error")
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.message(message)
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.errorCode("RUNTIME_ERROR")
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.path(request.getRequestURI())
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.build();
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return ResponseEntity.status(HttpStatus.INTERNAL_SERVER_ERROR).body(errorResponse);
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}
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/**
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* 通用异常处理
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*/
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@ExceptionHandler(Exception.class)
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public ResponseEntity<ErrorResponse> handleGenericException(Exception e, HttpServletRequest request) {
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log.error("系统异常: {}", e.getMessage(), e);
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ErrorResponse errorResponse = ErrorResponse.builder()
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.timestamp(LocalDateTime.now())
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.status(HttpStatus.INTERNAL_SERVER_ERROR.value())
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.error("System Error")
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.message("系统异常，请联系管理员")
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.errorCode("SYSTEM_ERROR")
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.path(request.getRequestURI())
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.build();
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return ResponseEntity.status(HttpStatus.INTERNAL_SERVER_ERROR).body(errorResponse);
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}
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/**
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* 统一错误响应格式
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*/
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public static class ErrorResponse {
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private LocalDateTime timestamp;
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private int status;
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private String error;
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private String message;
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private String errorCode;
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private String path;
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private Map<String, Object> details;
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public ErrorResponse() {
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this.details = new HashMap<>();
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}
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public static ErrorResponseBuilder builder() {
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return new ErrorResponseBuilder();
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}
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// Getters and Setters
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public LocalDateTime getTimestamp() { return timestamp; }
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public void setTimestamp(LocalDateTime timestamp) { this.timestamp = timestamp; }
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public int getStatus() { return status; }
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public void setStatus(int status) { this.status = status; }
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public String getError() { return error; }
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public void setError(String error) { this.error = error; }
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public String getMessage() { return message; }
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public void setMessage(String message) { this.message = message; }
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public String getErrorCode() { return errorCode; }
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public void setErrorCode(String errorCode) { this.errorCode = errorCode; }
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public String getPath() { return path; }
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public void setPath(String path) { this.path = path; }
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public Map<String, Object> getDetails() { return details; }
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public void setDetails(Map<String, Object> details) { this.details = details; }
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public static class ErrorResponseBuilder {
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private ErrorResponse errorResponse = new ErrorResponse();
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public ErrorResponseBuilder timestamp(LocalDateTime timestamp) {
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errorResponse.setTimestamp(timestamp);
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return this;
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}
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public ErrorResponseBuilder status(int status) {
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errorResponse.setStatus(status);
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return this;
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}
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public ErrorResponseBuilder error(String error) {
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errorResponse.setError(error);
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return this;
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}
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public ErrorResponseBuilder message(String message) {
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errorResponse.setMessage(message);
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return this;
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}
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public ErrorResponseBuilder errorCode(String errorCode) {
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errorResponse.setErrorCode(errorCode);
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return this;
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}
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public ErrorResponseBuilder path(String path) {
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errorResponse.setPath(path);
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return this;
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}
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public ErrorResponseBuilder detail(String key, Object value) {
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errorResponse.getDetails().put(key, value);
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return this;
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}
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public ErrorResponse build() {
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return errorResponse;
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}
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}
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}
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/**
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* 业务异常类
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*/
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public static class BusinessException extends RuntimeException {
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private final String errorCode;
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public BusinessException(String message) {
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super(message);
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this.errorCode = "BUSINESS_ERROR";
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}
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public BusinessException(String errorCode, String message) {
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super(message);
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this.errorCode = errorCode;
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}
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public BusinessException(String message, Throwable cause) {
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super(message, cause);
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this.errorCode = "BUSINESS_ERROR";
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}
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public String getErrorCode() {
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return errorCode;
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}
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}
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/**
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* 秒杀异常类
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*/
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public static class FlashSaleException extends RuntimeException {
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private final String errorCode;
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public FlashSaleException(String message) {
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super(message);
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this.errorCode = "FLASH_SALE_ERROR";
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}
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public FlashSaleException(String errorCode, String message) {
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super(message);
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this.errorCode = errorCode;
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}
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public String getErrorCode() {
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return errorCode;
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}
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}
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/**
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* 限流异常类
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*/
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public static class RateLimitException extends RuntimeException {
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public RateLimitException(String message) {
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super(message);
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}
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public RateLimitException(String message, Throwable cause) {
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super(message, cause);
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}
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}
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}
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