🆕 生成条形码

src/main/java/tech/riemann/ims/controller/platform/material/MaterialController.java

@@ -19,8 +19,10 @@ import org.springframework.validation.annotation.Validated;
 import org.springframework.web.bind.annotation.*;
 import tech.riemann.ims.entity.material.Material;
 import tech.riemann.ims.service.material.IMaterialService;
+import tech.riemann.ims.utils.BarcodeUtil;
 
 import javax.annotation.Nonnull;
+import java.util.ArrayList;
 import java.util.List;
 import java.util.concurrent.ExecutionException;
 import java.util.concurrent.TimeUnit;
@@ -127,4 +129,21 @@ public class MaterialController {
             throw BizException.create("删除物料失败!");
         }
     }
+
+    // 批量生成条形码
+    @PostMapping("material/{id}/generate-barcodes")
+    @Operation(summary = "批量生成条形码")
+    public List<String> generateBarcodes(@Parameter(description = "物料id", required = true)  @PathVariable Long id,
+                                  @Parameter(description = "条形码数量", required = true)  @RequestParam(name = "count") int count) {
+        List<String> res = new ArrayList<>();
+        Material byId = materialService.getById(id);
+        if (byId != null && count > 0) {
+            String code = byId.getCode();
+            while (count-- > 0) {
+                res.add(code  + BarcodeUtil.generateBarcode());
+            }
+        }
+        log.info("生成条形码成功，条形码列表：{}", res);
+        return res;
+    }
 }

src/main/java/tech/riemann/ims/utils/BarcodeUtil.java

@@ -0,0 +1,60 @@
+package tech.riemann.ims.utils;
+
+import lombok.experimental.UtilityClass;
+
+import java.text.SimpleDateFormat;
+import java.util.Collections;
+import java.util.Date;
+import java.util.HashSet;
+import java.util.Set;
+import java.util.concurrent.ConcurrentHashMap;
+import java.util.concurrent.ThreadLocalRandom;
+
+/**
+ * @author mayong
+ * @since 2024/12/12 20:39
+ */
+@UtilityClass
+public class BarcodeUtil {
+
+    // 用于存储每天已经生成的条码的最后三位
+    private static final ConcurrentHashMap<String, Set<Integer>> dailySequences = new ConcurrentHashMap<>();
+
+    // 日期格式化为年份后两位和一年中的某一天
+    private static final SimpleDateFormat sdf = new SimpleDateFormat("yyDDD");
+
+    /**
+     * 生成一个7位数字条码，前4位表示年份后两位和一年中的某一天，后3位随机且当天不重复
+     */
+    public static synchronized String generateBarcode() {
+        // 获取当前日期部分（简化为年份后两位和一年中的第几天）
+        String datePart = sdf.format(new Date());
+
+        // 如果当天的序列号集合不存在，则初始化一个新的集合
+        dailySequences.putIfAbsent(datePart, Collections.synchronizedSet(new HashSet<>()));
+
+        // 获取当天的序列号集合
+        Set<Integer> sequencesToday = dailySequences.get(datePart);
+
+        // 生成随机且不重复的三位数
+        int sequence;
+        do {
+            sequence = ThreadLocalRandom.current().nextInt(0, 9999);
+        } while (sequencesToday.contains(sequence));
+
+        // 将新生成的序列号添加到当天的集合中
+        sequencesToday.add(sequence);
+
+        // 格式化序列号为3位字符串，不足前面补0
+        String sequencePart = String.format("%04d", sequence);
+
+        return datePart + sequencePart;
+    }
+
+    /**
+     * 模拟新的一天开始，重置当天的序列号集合
+     */
+    public static void resetDailySequence() {
+        dailySequences.clear();
+    }
+}