增加工作流代码可正常启动

backend/src/main/java/com/qqchen/deploy/backend/workflow/converter/JsonObjectConverter.java

@@ -0,0 +1,45 @@
+package com.qqchen.deploy.backend.workflow.converter;
+
+import com.fasterxml.jackson.core.JsonProcessingException;
+import com.fasterxml.jackson.databind.ObjectMapper;
+import jakarta.persistence.AttributeConverter;
+import jakarta.persistence.Converter;
+import lombok.extern.slf4j.Slf4j;
+import org.springframework.util.StringUtils;
+
+/**
+ * JSON对象转换器
+ * 用于在数据库字符串和Java对象之间进行转换
+ */
+@Slf4j
+@Converter
+public class JsonObjectConverter implements AttributeConverter<Object, String> {
+
+    private static final ObjectMapper objectMapper = new ObjectMapper();
+
+    @Override
+    public String convertToDatabaseColumn(Object attribute) {
+        if (attribute == null) {
+            return null;
+        }
+        try {
+            return objectMapper.writeValueAsString(attribute);
+        } catch (JsonProcessingException e) {
+            log.error("Error converting object to json string", e);
+            return null;
+        }
+    }
+
+    @Override
+    public Object convertToEntityAttribute(String dbData) {
+        if (!StringUtils.hasText(dbData)) {
+            return null;
+        }
+        try {
+            return objectMapper.readValue(dbData, Object.class);
+        } catch (JsonProcessingException e) {
+            log.error("Error converting json string to object", e);
+            return null;
+        }
+    }
+}