fix(risk-dangerSource): 危险源编号自动生成

- RiskDangerSourceController.add 移除强制 bo.setSourceCode(null)
- RiskDangerSourceServiceImpl.insertByBo:
  * 上报时间前端不传时取当前时间(对应 report_time NOT NULL)
  * 编号为空时自动生成 DAS + yyyyMMddHHmmss + 3位随机数
  * 冲突自动重试 5 次,极端 UUID 兜底
  * 保证 UNIQUE KEY uk_source_code 不冲突

ruoyi-modules/ruoyi-risk/src/main/java/org/dromara/risk/controller/RiskDangerSourceController.java

@@ -66,10 +66,7 @@ public class RiskDangerSourceController extends BaseController {
     @RepeatSubmit()
     @PostMapping
     public R<Void> add(@Validated(AddGroup.class) @RequestBody RiskDangerSourceBo bo) {
-        if (ObjectUtil.isNull(bo.getId())) {
-            // 编号由系统生成,无需前端传入
-            bo.setSourceCode(null);
-        }
+        // 危险源编号由 Service 自动生成,前端无需传入
         return toAjax(dangerSourceService.insertByBo(bo));
     }
 

ruoyi-modules/ruoyi-risk/src/main/java/org/dromara/risk/service/impl/RiskDangerSourceServiceImpl.java

@@ -1,5 +1,6 @@
 package org.dromara.risk.service.impl;
 
+import cn.hutool.core.util.IdUtil;
 import cn.hutool.core.util.ObjectUtil;
 import com.baomidou.mybatisplus.core.conditions.query.LambdaQueryWrapper;
 import com.baomidou.mybatisplus.core.toolkit.Wrappers;
@@ -17,6 +18,8 @@ import org.dromara.risk.mapper.RiskDangerSourceMapper;
 import org.dromara.risk.service.IRiskDangerSourceService;
 import org.springframework.stereotype.Service;
 
+import java.text.SimpleDateFormat;
+import java.util.Date;
 import java.util.List;
 import java.util.Map;
 
@@ -90,12 +93,42 @@ public class RiskDangerSourceServiceImpl implements IRiskDangerSourceService {
      */
     @Override
     public int insertByBo(RiskDangerSourceBo bo) {
+        // 上报时间前端不传时取当前时间
+        if (bo.getReportTime() == null) {
+            bo.setReportTime(new Date());
+        }
+        // 危险源编号:前端未传时系统自动生成(避免 UNIQUE KEY uk_source_code 冲突)
+        if (StringUtils.isBlank(bo.getSourceCode())) {
+            bo.setSourceCode(generateSourceCode());
+        }
         RiskDangerSource add = MapstructUtils.convert(bo, RiskDangerSource.class);
         int row = baseMapper.insert(add);
         bo.setId(add.getId());
         return row;
     }
 
+    /**
+     * 生成危险源编号:DAS + yyyyMMddHHmmss + 3位随机数
+     * 冲突自动重试 5 次,极端情况用 UUID 兜底,保证 UNIQUE KEY uk_source_code 不冲突
+     */
+    private String generateSourceCode() {
+        String prefix = "DAS";
+        String ts = new SimpleDateFormat("yyyyMMddHHmmss").format(new Date());
+        java.util.concurrent.ThreadLocalRandom random = java.util.concurrent.ThreadLocalRandom.current();
+        for (int i = 0; i < 5; i++) {
+            String suffix = StringUtils.leftPad(
+                Integer.toString(random.nextInt(1000)), 3, '0');
+            String code = prefix + ts + suffix;
+            Long exists = baseMapper.selectCount(Wrappers.<RiskDangerSource>lambdaQuery()
+                .eq(RiskDangerSource::getSourceCode, code));
+            if (exists == null || exists == 0) {
+                return code;
+            }
+        }
+        // 极端情况:同秒生成的 5 个都撞了,加 UUID 后缀兜底
+        return prefix + ts + IdUtil.fastSimpleUUID().substring(0, 4).toUpperCase();
+    }
+
     /**
      * 修改危险源
      */