Java将数据输出文件

public static void main(String[] args) {
        // TODO Auto-generated method stub
        String str = "{\n" +
                "  \"code\": 0,\n" +
                "  \"requestId\": null,\n" +
                "  \"data\": {\n" +
                "    \"echoMap\": {},\n" +
                "    \"id\": \"1620302639438495744\",\n" +
                "    \"createTime\": \"2023-01-31 14:07:08\",\n" +
                "    \"createdBy\": \"1581830763102937088\",\n" +
                "    \"updateTime\": \"2023-02-01 17:36:00\",\n" +
                "    \"updatedBy\": \"1581830763102937088\",\n" +
                "    \"projectId\": \"1619884237901262848\",\n" +
                "    \"filePath\": \"https://dfs-file-test.dalezhuang.com/group1/estimate/2023/01/31/1620302639305269248.dwg\",\n" +
                "    \"fileName\": \"40、龙德健康大厦\",\n" +
                "    \"deleteStatus\": 0,\n" +
                "    \"filePathName\": \"/group1/estimate/2023/01/31/1620302639305269248.dwg\",\n" +
                "    \"md5\": \"2ab80b6e3ef5b95e9d6d2e61018d6a08\",\n" +
                "    \"changeRemarks\": \"2023-01-31 14:07:07上传\",\n" +
                "    \"pid\": \"1620302639438495744\",\n" +
                "    \"versionStatus\": 0,\n" +
                "    \"fileType\": 0,\n" +
                "    \"hasBom\": null,\n" +
                "    \"userName\": null,\n" +
                "    \"timeDifference\": null,\n" +
                "    \"readStatus\": null,\n" +
                "    \"order\": null,\n" +
                "    \"layerColor\": null,\n" +
                "    \"operateBy\": null,\n" +
                "    \"operateTime\": \"2023-02-01 17:35:59\"\n" +
                "  },\n" +
                "  \"msg\": \"成功\",\n" +
                "  \"path\": null,\n" +
                "  \"extra\": null,\n" +
                "  \"timestamp\": \"1675677977543\",\n" +
                "  \"errorMsg\": \"\",\n" +
                "  \"isSuccess\": true\n" +
                "}";
        try {
            File file=new File("D:\\"+ DateUtil.format(new Date(), DatePattern.CHINESE_DATE_TIME_PATTERN) +".txt");
            if(!file.exists()) {
                file.createNewFile();
            }

            //创建文件输出流
            FileOutputStream fout=new FileOutputStream(file);

            fout.write(str.getBytes());
            System.out.println("文件写入成功");

        } catch (IOException e) {
            // TODO Auto-generated catch block
            System.out.println(e.getMessage());
        }

    }