feat(crm): add person, identity, conversation, tag tables and APIs

backend/mci-shared/src/main/java/com/sino/mci/shared/util/JsonUtils.java

@@ -0,0 +1,38 @@
+package com.sino.mci.shared.util;
+
+import com.fasterxml.jackson.core.JsonProcessingException;
+import com.fasterxml.jackson.databind.ObjectMapper;
+import lombok.extern.slf4j.Slf4j;
+
+@Slf4j
+public final class JsonUtils {
+
+    private static final ObjectMapper OBJECT_MAPPER = new ObjectMapper();
+
+    private JsonUtils() {
+    }
+
+    public static String toJson(Object value) {
+        if (value == null) {
+            return null;
+        }
+        try {
+            return OBJECT_MAPPER.writeValueAsString(value);
+        } catch (JsonProcessingException e) {
+            log.warn("JSON serialize failed", e);
+            return null;
+        }
+    }
+
+    public static <T> T fromJson(String json, Class<T> clazz) {
+        if (json == null || json.isBlank()) {
+            return null;
+        }
+        try {
+            return OBJECT_MAPPER.readValue(json, clazz);
+        } catch (JsonProcessingException e) {
+            log.warn("JSON deserialize failed", e);
+            return null;
+        }
+    }
+}