copy

src/main/java/com/aps/common/util/DeepCopyUtil.java

+package com.aps.common.util;
+
+import com.fasterxml.jackson.core.type.TypeReference;
+import com.fasterxml.jackson.databind.ObjectMapper;
+import java.util.List;
+import java.util.Optional;
+
+/**
+ * 最常用的深拷贝工具类
+ */
+public class DeepCopyUtil {
+    
+    private static final ObjectMapper objectMapper = new ObjectMapper();
+    
+    /**
+     * 单个对象深拷贝（最常用）
+     */
+    @SuppressWarnings("unchecked")
+    public static <T> T deepCopy(T source) {
+        if (source == null) return null;
+        
+        try {
+            String json = objectMapper.writeValueAsString(source);
+            return (T) objectMapper.readValue(json, source.getClass());
+        } catch (Exception e) {
+            throw new RuntimeException("深拷贝失败", e);
+        }
+    }
+    
+    /**
+     * 列表深拷贝（很常用）
+     */
+    public static <T> List<T> deepCopyList(List<T> source) {
+        if (source == null) return List.of();
+        
+        try {
+            String json = objectMapper.writeValueAsString(source);
+            return objectMapper.readValue(json, new TypeReference<List<T>>() {});
+        } catch (Exception e) {
+            throw new RuntimeException("列表深拷贝失败", e);
+        }
+    }
+    
+    /**
+     * 安全深拷贝（返回Optional，避免异常）
+     */
+    public static <T> Optional<T> safeDeepCopy(T source) {
+        try {
+            return Optional.ofNullable(deepCopy(source));
+        } catch (Exception e) {
+            return Optional.empty();
+        }
+    }
+}
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