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+package com.fjhx.admin.utils;
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+
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+import cn.hutool.core.convert.Convert;
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+import cn.hutool.core.date.DateUtil;
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+import cn.hutool.core.text.CharSequenceUtil;
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+import cn.hutool.core.util.ObjectUtil;
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+import cn.hutool.extra.spring.SpringUtil;
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+import com.baomidou.mybatisplus.extension.service.IService;
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+import com.fjhx.admin.service.product.ProductInfoService;
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+import com.ruoyi.common.exception.ServiceException;
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+import lombok.Getter;
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+
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+import java.util.Date;
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+import java.util.Map;
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+
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+@Getter
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+public enum CodeEnum {
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+
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+ // 产品编码
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+ PRODUCT("P", null, "code", 5, ProductInfoService.class),
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+
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+ ;
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+
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+ CodeEnum(String prefix, String dateFormat, String codeFieldName, Integer length, Class<? extends IService<?>> serviceCls) {
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+ this.prefix = prefix;
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+ this.dateFormat = dateFormat;
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+ this.length = length;
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+ this.codeFieldName = codeFieldName;
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+ this.service = SpringUtil.getBean(serviceCls);
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+ }
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+
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+ // 编码前缀
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+ private final String prefix;
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+ // 编码加日期规则
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+ private final String dateFormat;
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+ // 长度
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+ private final Integer length;
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+ // 编码字段名
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+ private final String codeFieldName;
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+ // service
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+ private final IService<?> service;
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+
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+ /**
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+ * 获取键值对
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+ */
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+ public String getCode() {
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+ String itemPrefix;
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+
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+ if (ObjectUtil.isNotEmpty(dateFormat)) {
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+ Date date = new Date();
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+ String format = DateUtil.format(date, dateFormat);
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+ itemPrefix = prefix + format;
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+ } else {
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+ itemPrefix = prefix;
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+ }
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+
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+ Object obj = service.query()
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+ .likeRight(codeFieldName, itemPrefix)
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+ .orderByDesc(codeFieldName)
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+ .last("limit 1")
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+ .one();
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+
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+ if (obj == null) {
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+ return itemPrefix + autoGenericCode(length, 0);
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+ }
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+
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+ Map<String, Object> map = Convert.toMap(String.class, Object.class, obj);
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+
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+ String code = Convert.toStr(map.get(CharSequenceUtil.toCamelCase(codeFieldName)));
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+ Integer codeNum = Convert.toInt(code.substring(itemPrefix.length()));
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+ if (codeNum == null) {
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+ throw new ServiceException("自定义编码与系统编码生成规则冲突，暂时无法生成编码，请联系管理员");
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+ }
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+
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+ return itemPrefix + autoGenericCode(length, codeNum);
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+ }
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+
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+ /**
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+ * 获取键值对
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+ */
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+ public String getCode(String code) {
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+ if (ObjectUtil.isNotEmpty(code)) {
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+ Long count = service.query().eq(codeFieldName, code).count();
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+ if (count != 0) {
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+ throw new ServiceException("编码已存在");
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+ }
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+ return code;
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+ } else {
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+ return getCode();
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+ }
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+ }
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+
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+ /**
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+ * 不够位数的在前面补0，保留num的长度位数字
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+ */
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+ private static String autoGenericCode(int length, Integer codeNum) {
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+ return String.format("%0" + length + "d", codeNum + 1);
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+ }
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+
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+}
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