基本模块配置，以及导入相关uitl包

src/main/java/com/example/gb/controller/GoldBeanController.java

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+package com.example.gb.controller;
+
+public class GoldBeanController {
+}

src/main/java/com/example/gb/dao/GoldBeanMapper.java

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+package com.example.gb.dao;
+
+public interface GoldBeanMapper {
+}

src/main/java/com/example/gb/service/GoldBeanService.java

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+package com.example.gb.service;
+
+public interface GoldBeanService {
+}

src/main/java/com/example/gb/service/impl/GoldBeanServiceimpl.java

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+package com.example.gb.service.impl;
+
+import com.example.gb.service.GoldBeanService;
+
+public class GoldBeanServiceimpl implements GoldBeanService {
+}

src/main/java/com/example/gb/util/BusinessException.java

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+package com.example.gb.util;
+
+/**
+ * @program: GOLD
+ * @ClassName BusinessException
+ * @description:
+ * @author: huangqizhen
+ * @create: 2025−06-23 14:58
+ * @Version 1.0
+ **/
+
+import lombok.Getter;
+
+/**
+ * 业务异常，可抛出到前端
+ */
+@Getter
+public class BusinessException extends RuntimeException {
+    private int code; // 业务状态码
+    // 使用默认状态码0的构造方法
+    public BusinessException(String message) {
+        this(400, message); // 默认状态码400
+    }
+
+    // 指定状态码的构造方法
+    public BusinessException(int code, String message) {
+        super(message);
+        this.code = code;
+    }
+
+}

src/main/java/com/example/gb/util/Result.java

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+package com.example.gb.util;
+
+import com.fasterxml.jackson.core.JsonProcessingException;
+import com.fasterxml.jackson.databind.ObjectMapper;
+import lombok.AllArgsConstructor;
+import lombok.Data;
+import lombok.NoArgsConstructor;
+
+
+import java.io.Serializable;
+import java.util.HashMap;
+
+@Data
+@NoArgsConstructor
+@AllArgsConstructor
+public class Result implements Serializable {
+    private static final long serialVersionUID = 1L;
+    private Integer code; // 响应码，200 代表成功；401 代表未授权
+    private String msg;   // 响应消息
+    private Object data;  // 返回的数据
+
+    // 成功响应（不需要给前端返回数据）
+    public static Result success() {
+        return new Result(200, "success", new HashMap<>());
+    }
+    //登录返回token使用
+    public static Result success(String token,Object data) {
+       return new Result(200, token, data);
+    }
+    // 查询成功响应（把查询结果作为返回数据响应给前端）
+    public static Result success(Object data) {
+        return new Result(200, "success", data);
+    }
+
+    // 失败响应
+    public static Result error(String msg) {
+        return new Result(0, msg, new HashMap<>());
+    }
+
+    // 失败响应，可以自定义错误码
+    public static Result error(int code, String msg) {
+        return new Result(code, msg, new HashMap<>());
+    }
+
+    // 成功响应，可以自定义消息和数据
+    public static Result success(String msg, HashMap<String, Object> resultData) {
+        return new Result(200, msg, resultData);  // 返回成功响应，状态码为 200
+    }
+
+    // 未授权响应，可以自定义错误码
+    public static Result unauthorized(int code, String msg) {
+        return new Result(code, msg, new HashMap<>());
+    }
+
+    // 错误响应，状态码为200，code为401
+    public static Result unauthorized(String msg) {
+        return new Result(401, msg, new HashMap<>());
+    }
+
+    //失败响应 自定义状态码 默认为500
+    public static Result error(BusinessException e) {
+        Result response = new Result();
+        // 定义默认错误码映射
+        final int defaultErrorCode = 400;
+        // 检查 getCode() 是否为 null（如果是 Integer）
+        Integer code = e.getCode();
+        if (code == null || code == 0) {
+            response.setCode(defaultErrorCode); // 默认错误码
+        } else {
+            response.setCode(code);
+        }
+        response.setMsg(e.getMessage());
+        return response;
+    }
+    public String toJson() throws JsonProcessingException {
+        ObjectMapper mapper = new ObjectMapper();
+        return mapper.writeValueAsString(this);
+    }
+}

src/main/resources/mapper/GoldBeanMapper.xml

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+<?xml version="1.0" encoding="UTF-8"?>
+<!DOCTYPE mapper PUBLIC "-//mybatis.org//DTD Mapper 3.0//EN" "http://mybatis.org/dtd/mybatis-3-mapper.dtd">
+<mapper namespace="com.example.gb.dao.GoldBeanMapper">
+</mapper>