farm模块-图片转换

yudao-module-farm/src/main/java/cn/iocoder/yudao/module/farm/framework/json/StringOrArrayToStringDeserializer.java

@@ -0,0 +1,42 @@
+package cn.iocoder.yudao.module.farm.framework.json;
+
+import com.fasterxml.jackson.core.JsonParser;
+import com.fasterxml.jackson.core.JsonToken;
+import com.fasterxml.jackson.databind.DeserializationContext;
+import com.fasterxml.jackson.databind.JsonDeserializer;
+
+import java.io.IOException;
+import java.util.ArrayList;
+import java.util.List;
+import java.util.stream.Collectors;
+
+/**
+ * 支持字符串或字符串数组反序列化为逗号分隔的字符串
+ */
+public class StringOrArrayToStringDeserializer extends JsonDeserializer<String> {
+
+    @Override
+    public String deserialize(JsonParser p, DeserializationContext ctxt) throws IOException {
+        JsonToken currentToken = p.getCurrentToken();
+        if (currentToken == JsonToken.VALUE_STRING) {
+            return p.getValueAsString();
+        }
+        if (currentToken == JsonToken.START_ARRAY) {
+            List<String> values = new ArrayList<>();
+            while (p.nextToken() != JsonToken.END_ARRAY) {
+                if (p.getCurrentToken() == JsonToken.VALUE_STRING) {
+                    values.add(p.getValueAsString());
+                } else {
+                    // 跳过非字符串元素
+                    p.skipChildren();
+                }
+            }
+            return values.stream().filter(s -> s != null && !s.isEmpty()).distinct().collect(Collectors.joining(","));
+        }
+        // 其他类型，跳过
+        p.skipChildren();
+        return null;
+    }
+}
+
+