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Kl json (#686)

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* 新增：JSON 文件格式化预览功能

* 优化：优化 JSON 文件格式化预览效果
This commit is contained in:
kl
2025-10-11 17:54:17 +08:00
committed by GitHub
parent a9787b0add
commit 51653483b9
3 changed files with 286 additions and 52 deletions
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72
server/src/main/java/cn/keking/service/impl/JsonFilePreviewImpl.java
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@ -1,9 +1,22 @@
package cn.keking.service.impl;
import cn.keking.config.ConfigConstants;
import cn.keking.model.FileAttribute;
import cn.keking.model.ReturnResponse;
import cn.keking.service.FileHandlerService;
import cn.keking.service.FilePreview;
import cn.keking.utils.DownloadUtils;
import cn.keking.utils.KkFileUtils;
import org.apache.commons.codec.binary.Base64;
import org.springframework.stereotype.Service;
import org.springframework.ui.Model;
import org.springframework.web.util.HtmlUtils;
import java.io.*;
import java.nio.charset.StandardCharsets;
import java.nio.file.Files;
import java.nio.file.Paths;
/**
* @author kl (http://kailing.pub)
@ -13,15 +26,66 @@ import org.springframework.ui.Model;
@Service
public class JsonFilePreviewImpl implements FilePreview {
private final SimTextFilePreviewImpl simTextFilePreview;
private final FileHandlerService fileHandlerService;
private final OtherFilePreviewImpl otherFilePreview;
public JsonFilePreviewImpl(SimTextFilePreviewImpl simTextFilePreview) {
this.simTextFilePreview = simTextFilePreview;
public JsonFilePreviewImpl(FileHandlerService fileHandlerService, OtherFilePreviewImpl otherFilePreview) {
this.fileHandlerService = fileHandlerService;
this.otherFilePreview = otherFilePreview;
}
@Override
public String filePreviewHandle(String url, Model model, FileAttribute fileAttribute) {
simTextFilePreview.filePreviewHandle(url, model, fileAttribute);
String fileName = fileAttribute.getName();
boolean forceUpdatedCache = fileAttribute.forceUpdatedCache();
String filePath = fileAttribute.getOriginFilePath();
if (forceUpdatedCache || !fileHandlerService.listConvertedFiles().containsKey(fileName) || !ConfigConstants.isCacheEnabled()) {
ReturnResponse<String> response = DownloadUtils.downLoad(fileAttribute, fileName);
if (response.isFailure()) {
return otherFilePreview.notSupportedFile(model, fileAttribute, response.getMsg());
}
filePath = response.getContent();
if (ConfigConstants.isCacheEnabled()) {
fileHandlerService.addConvertedFile(fileName, filePath);
}
try {
String fileData = readJsonFile(filePath, fileName);
String escapedData = HtmlUtils.htmlEscape(fileData);
String base64Data = Base64.encodeBase64String(escapedData.getBytes(StandardCharsets.UTF_8));
model.addAttribute("textData", base64Data);
} catch (IOException e) {
return otherFilePreview.notSupportedFile(model, fileAttribute, e.getLocalizedMessage());
}
return JSON_FILE_PREVIEW_PAGE;
}
String fileData = null;
try {
fileData = HtmlUtils.htmlEscape(readJsonFile(filePath, fileName));
} catch (IOException e) {
e.printStackTrace();
}
String base64Data = Base64.encodeBase64String(fileData.getBytes(StandardCharsets.UTF_8));
model.addAttribute("textData", base64Data);
return JSON_FILE_PREVIEW_PAGE;
}
/**
* 读取 JSON 文件，强制使用 UTF-8 编码
* JSON 标准规定必须使用 UTF-8 编码
*/
private String readJsonFile(String filePath, String fileName) throws IOException {
File file = new File(filePath);
if (KkFileUtils.isIllegalFileName(fileName)) {
return null;
}
if (!file.exists() || file.length() == 0) {
return "";
}
// JSON 标准规定使用 UTF-8 编码，不依赖自动检测
byte[] bytes = Files.readAllBytes(Paths.get(filePath));
return new String(bytes, StandardCharsets.UTF_8);
}
}

4
server/src/main/java/cn/keking/service/impl/SimTextFilePreviewImpl.java
View File

@ -47,7 +47,7 @@ public class SimTextFilePreviewImpl implements FilePreview {
}
try {
String fileData = HtmlUtils.htmlEscape(textData(filePath,fileName));
model.addAttribute("textData", Base64.encodeBase64String(fileData.getBytes()));
model.addAttribute("textData", Base64.encodeBase64String(fileData.getBytes(StandardCharsets.UTF_8)));
} catch (IOException e) {
return otherFilePreview.notSupportedFile(model, fileAttribute, e.getLocalizedMessage());
}
@ -59,7 +59,7 @@ public class SimTextFilePreviewImpl implements FilePreview {
} catch (IOException e) {
e.printStackTrace();
}
model.addAttribute("textData", Base64.encodeBase64String(fileData.getBytes()));
model.addAttribute("textData", Base64.encodeBase64String(fileData.getBytes(StandardCharsets.UTF_8)));
return TXT_FILE_PREVIEW_PAGE;
}