feat(response): 全局异常处理

src/main/java/org/linker/springboot/constants/ServiceExceptionEnum.java

+package org.linker.springboot.constants;
+
+/**
+ * 业务异常枚举
+ */
+public enum ServiceExceptionEnum {
+
+    // ========== 系统级别 ==========
+    SUCCESS(0, "成功"),
+    SYS_ERROR(2001001000, "服务端发生异常"),
+    MISSING_REQUEST_PARAM_ERROR(2001001001, "参数缺失"),
+
+    // ========== 用户模块 ==========
+    USER_NOT_FOUND(1001002000, "用户不存在"),
+
+    // ========== 订单模块 ==========
+
+    // ========== 商品模块 ==========
+    ;
+
+    /**
+     * 错误码
+     */
+    private final int code;
+    /**
+     * 错误提示
+     */
+    private final String message;
+
+    ServiceExceptionEnum(int code, String message) {
+        this.code = code;
+        this.message = message;
+    }
+
+    public int getCode() {
+        return code;
+    }
+
+    public String getMessage() {
+        return message;
+    }
+
+}
\ No newline at end of file

src/main/java/org/linker/springboot/controller/UserController.java

 package org.linker.springboot.controller;
 
+import org.linker.springboot.constants.ServiceExceptionEnum;
+import org.linker.springboot.core.exception.ServiceException;
 import org.linker.springboot.core.vo.CommonResult;
 import org.linker.springboot.dto.UserAddDTO;
 import org.linker.springboot.dto.UserUpdateDTO;
@@ -122,4 +124,20 @@ public class UserController {
         return CommonResult.success(user);
     }
 
+    /**
+     * 测试抛出 NullPointerException 异常
+     */
+    @GetMapping("/exception-01")
+    public UserVO exception01() {
+        throw new NullPointerException("没有粗面鱼丸");
+    }
+
+    /**
+     * 测试抛出 ServiceException 异常
+     */
+    @GetMapping("/exception-02")
+    public UserVO exception02() {
+        throw new ServiceException(ServiceExceptionEnum.USER_NOT_FOUND);
+    }
+
 }

src/main/java/org/linker/springboot/core/exception/ServiceException.java

+package org.linker.springboot.core.exception;
+
+import org.linker.springboot.constants.ServiceExceptionEnum;
+
+public final class ServiceException extends RuntimeException {
+
+    /**
+     * 错误码
+     */
+    private final Integer code;
+
+    public ServiceException(ServiceExceptionEnum serviceExceptionEnum) {
+        // 使用父类的 message 字段
+        super(serviceExceptionEnum.getMessage());
+        // 设置错误码
+        this.code = serviceExceptionEnum.getCode();
+    }
+
+    public Integer getCode() {
+        return code;
+    }
+
+}

src/main/java/org/linker/springboot/core/web/GlobalExceptionHandler.java

+package org.linker.springboot.core.web;
+
+import jakarta.servlet.http.HttpServletRequest;
+import org.linker.springboot.core.exception.ServiceException;
+import org.linker.springboot.constants.ServiceExceptionEnum;
+import org.linker.springboot.core.vo.CommonResult;
+
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+import org.springframework.web.bind.MissingServletRequestParameterException;
+import org.springframework.web.bind.annotation.ControllerAdvice;
+import org.springframework.web.bind.annotation.ExceptionHandler;
+import org.springframework.web.bind.annotation.ResponseBody;
+
+
+@ControllerAdvice(basePackages = "org.linker.springboot.controller")
+public class GlobalExceptionHandler {
+
+    private Logger logger = LoggerFactory.getLogger(getClass());
+
+    /**
+     * 处理 ServiceException 异常
+     */
+    @ResponseBody
+    @ExceptionHandler(value = ServiceException.class)
+    public CommonResult serviceExceptionHandler(HttpServletRequest req, ServiceException ex) {
+        logger.debug("[serviceExceptionHandler]", ex);
+        // 包装 CommonResult 结果
+        return CommonResult.error(ex.getCode(), ex.getMessage());
+    }
+
+    /**
+     * 处理 MissingServletRequestParameterException 异常
+     * <p>
+     * SpringMVC 参数不正确
+     */
+    @ResponseBody
+    @ExceptionHandler(value = MissingServletRequestParameterException.class)
+    public CommonResult missingServletRequestParameterExceptionHandler(HttpServletRequest req, MissingServletRequestParameterException ex) {
+        logger.debug("[missingServletRequestParameterExceptionHandler]", ex);
+        // 包装 CommonResult 结果
+        return CommonResult.error(ServiceExceptionEnum.MISSING_REQUEST_PARAM_ERROR.getCode(),
+                ServiceExceptionEnum.MISSING_REQUEST_PARAM_ERROR.getMessage());
+    }
+
+    /**
+     * 处理其它 Exception 异常
+     */
+    @ResponseBody
+    @ExceptionHandler(value = Exception.class)
+    public CommonResult exceptionHandler(HttpServletRequest req, Exception e) {
+        // 记录异常日志
+        logger.error("[exceptionHandler]", e);
+        // 返回 ERROR CommonResult
+        return CommonResult.error(ServiceExceptionEnum.SYS_ERROR.getCode(),
+                ServiceExceptionEnum.SYS_ERROR.getMessage());
+    }
+
+}

src/main/resources/application.properties

-spring.application.name=springboot

src/main/resources/application.yml

+spring:
+  application:
+    name: springboot

src/main/resources/rebel.xml

+<?xml version="1.0" encoding="UTF-8"?>
+
+<!--
+  This is the JRebel configuration file. It maps the running application to your IDE workspace, enabling JRebel reloading for this project.
+  Refer to https://manuals.jrebel.com/jrebel/standalone/config.html for more information.
+-->
+<application generated-by="intellij" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns="http://www.zeroturnaround.com" xsi:schemaLocation="http://www.zeroturnaround.com http://update.zeroturnaround.com/jrebel/rebel-2_3.xsd">
+
+	<id>springboot</id>
+
+	<classpath>
+		<dir name="/Users/zutjoe/code/spring-study/springboot/target/classes">
+		</dir>
+	</classpath>
+
+</application>