【功能修复】工作流：bpmnBytes 在非 UTF-8 环境下，可能存在乱码的问题

yudao-module-bpm/yudao-module-bpm-biz/src/main/java/cn/iocoder/yudao/module/bpm/convert/definition/BpmModelConvert.java

@@ -13,6 +13,7 @@ import cn.iocoder.yudao.module.bpm.controller.admin.definition.vo.model.BpmModel
 import cn.iocoder.yudao.module.bpm.controller.admin.definition.vo.process.BpmProcessDefinitionRespVO;
 import cn.iocoder.yudao.module.bpm.dal.dataobject.definition.BpmCategoryDO;
 import cn.iocoder.yudao.module.bpm.dal.dataobject.definition.BpmFormDO;
+import cn.iocoder.yudao.module.bpm.framework.flowable.core.util.BpmnModelUtils;
 import cn.iocoder.yudao.module.bpm.service.definition.dto.BpmModelMetaInfoRespDTO;
 import org.flowable.common.engine.impl.db.SuspensionState;
 import org.flowable.engine.repository.Deployment;
@@ -55,7 +56,7 @@ public interface BpmModelConvert {
         BpmModelMetaInfoRespDTO metaInfo = buildMetaInfo(model);
         BpmModelRespVO modelVO = buildModel0(model, metaInfo, null, null, null, null);
         if (ArrayUtil.isNotEmpty(bpmnBytes)) {
-            modelVO.setBpmnXml(new String(bpmnBytes));
+            modelVO.setBpmnXml(BpmnModelUtils.getBpmnXml(bpmnBytes));
         }
         return modelVO;
     }

yudao-module-bpm/yudao-module-bpm-biz/src/main/java/cn/iocoder/yudao/module/bpm/framework/flowable/core/util/BpmnModelUtils.java

@@ -2,6 +2,7 @@ package cn.iocoder.yudao.module.bpm.framework.flowable.core.util;
 
 import cn.hutool.core.collection.CollUtil;
 import cn.hutool.core.util.ArrayUtil;
+import cn.hutool.core.util.StrUtil;
 import cn.iocoder.yudao.framework.common.util.number.NumberUtils;
 import cn.iocoder.yudao.module.bpm.framework.flowable.core.enums.BpmnModelConstants;
 import org.flowable.bpmn.converter.BpmnXMLConverter;
@@ -108,7 +109,14 @@ public class BpmnModelUtils {
             return null;
         }
         BpmnXMLConverter converter = new BpmnXMLConverter();
-        return new String(converter.convertToXML(model));
+        return StrUtil.utf8Str(converter.convertToXML(model));
+    }
+
+    public static String getBpmnXml(byte[] bpmnBytes) {
+        if (ArrayUtil.isEmpty(bpmnBytes)) {
+            return null;
+        }
+        return StrUtil.utf8Str(bpmnBytes);
     }
 
     // ========== 遍历相关的方法 ==========