上传文件至 'project/util'

project/util/JsonSerializer.java

@@ -0,0 +1,55 @@
+package com.crawler.util;
+
+import com.crawler.model.CrawlerData;
+import com.fasterxml.jackson.core.type.TypeReference;
+import com.fasterxml.jackson.databind.ObjectMapper;
+import com.fasterxml.jackson.databind.SerializationFeature;
+
+import java.io.File;
+import java.io.IOException;
+import java.util.List;
+
+public class JsonSerializer {
+
+    private static final ObjectMapper objectMapper;
+
+    static {
+        objectMapper = new ObjectMapper();
+        objectMapper.enable(SerializationFeature.INDENT_OUTPUT);
+    }
+
+    private JsonSerializer() {}
+
+    public static void serializeToFile(List<CrawlerData> dataList, String filePath) throws IOException {
+        File file = new File(filePath);
+        File parentDir = file.getParentFile();
+        if (parentDir != null && !parentDir.exists()) {
+            parentDir.mkdirs();
+        }
+        objectMapper.writeValue(file, dataList);
+    }
+
+    public static List<CrawlerData> deserializeFromFile(String filePath) throws IOException {
+        File file = new File(filePath);
+        if (!file.exists()) {
+            throw new IOException("文件不存在: " + filePath);
+        }
+        return objectMapper.readValue(file, new TypeReference<List<CrawlerData>>() {});
+    }
+
+    public static String toJsonString(List<CrawlerData> dataList) throws IOException {
+        return objectMapper.writeValueAsString(dataList);
+    }
+
+    public static String toJsonString(CrawlerData data) throws IOException {
+        return objectMapper.writeValueAsString(data);
+    }
+
+    public static List<CrawlerData> fromJsonString(String jsonString) throws IOException {
+        return objectMapper.readValue(jsonString, new TypeReference<List<CrawlerData>>() {});
+    }
+
+    public static CrawlerData fromJsonStringToSingle(String jsonString) throws IOException {
+        return objectMapper.readValue(jsonString, CrawlerData.class);
+    }
+}