初始化
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176
_backup_20260613/FileController.java
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176
_backup_20260613/FileController.java
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package com.mokee.admin.controller;
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import com.baomidou.mybatisplus.core.metadata.IPage;
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import com.mokee.admin.service.FileService;
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import com.mokee.common.Result;
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import com.mokee.common.annotation.OperationLog;
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import com.mokee.common.entity.SysFile;
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import jakarta.servlet.http.HttpServletRequest;
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import jakarta.servlet.http.HttpServletResponse;
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import lombok.RequiredArgsConstructor;
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import org.springframework.http.HttpHeaders;
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import org.springframework.web.bind.annotation.*;
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import org.springframework.web.multipart.MultipartFile;
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import java.io.IOException;
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import java.net.URLDecoder;
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import java.net.URLEncoder;
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import java.nio.charset.StandardCharsets;
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import java.nio.file.Files;
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import java.nio.file.Path;
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import java.util.List;
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/**
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* 文件管理控制器
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* <p>
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* 文件二进制数据存储于本地磁盘，数据库仅保存元信息。
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* 向下兼容存量 BLOB 数据（file_data 非空时优先读磁盘，磁盘无文件则回退 DB BLOB）。
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* <p>
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* 请求路径前缀：{@code /zgapi/v1/admin/file}
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*
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* @author mokee
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*/
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@RestController
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@RequestMapping("/zgapi/v1/admin/file")
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@RequiredArgsConstructor
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public class FileController {
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private final FileService fileService;
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/**
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* 上传文件（管理后台）
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* <p>
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* 上传者显示名从请求头 X-User-Name 获取（由网关 HeaderInjectFilter 注入，已 URL 解码）。
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*/
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@OperationLog(module = "文件管理", action = "上传")
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@PostMapping("/upload")
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public Result<SysFile> upload(@RequestParam("file") MultipartFile file,
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@RequestParam(defaultValue = "other") String fileType,
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@RequestParam(required = false) String systemId,
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HttpServletRequest request) throws IOException {
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String userId = request.getHeader("X-User-Id");
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// X-User-Name 经网关 URL 编码（防 HTTP 转发中文损坏），需解码
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String userName = decodeHeader(request.getHeader("X-User-Name"));
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if (userName == null || userName.isEmpty()) {
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userName = request.getHeader("X-User-Account");
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}
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SysFile sf = fileService.upload(file, fileType, systemId, userId, userName);
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sf.setFileData(null); // 不返回二进制数据
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return Result.ok(sf);
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}
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/**
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* 分页查询文件列表（不含 file_data）
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*/
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@PostMapping("/page")
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public Result<IPage<SysFile>> page(@RequestBody java.util.Map<String, Object> params) {
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Integer page = params.get("page") != null ? ((Number) params.get("page")).intValue() : 1;
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Integer size = params.get("pageSize") != null ? ((Number) params.get("pageSize")).intValue() : 10;
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String fileType = (String) params.get("fileType");
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String fileName = (String) params.get("fileName");
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String uploadUserName = (String) params.get("uploadUserName");
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String systemId = params.get("systemId") != null ? params.get("systemId").toString() : null;
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return Result.ok(fileService.page(page, size, fileType, fileName, uploadUserName, systemId));
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}
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/**
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* 文件列表查询（不分页，不含 file_data）
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*/
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@GetMapping("/list")
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public Result<List<SysFile>> list(@RequestParam(required = false) String fileType,
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@RequestParam(required = false) String systemId) {
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return Result.ok(fileService.list(fileType, systemId));
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}
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/**
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* 获取文件元信息（不含二进制数据）
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*/
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@GetMapping("/{id}")
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public Result<SysFile> getById(@PathVariable String id) {
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return Result.ok(fileService.getMetaById(id));
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}
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/**
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* 预览文件 — 直接输出文件流
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* <p>
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* 优先读磁盘文件；磁盘文件不存在时回退到 DB BLOB（存量兼容）。
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* 设置 CORS 和缓存头，支持被 img 标签跨域引用。
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*/
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@GetMapping("/{id}/view")
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public void view(@PathVariable String id, HttpServletResponse response) throws IOException {
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SysFile sf = fileService.getById(id);
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if (sf == null) { response.setStatus(404); return; }
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Path diskPath = fileService.getDiskPath(sf);
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if (!Files.exists(diskPath)) {
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response.setStatus(404);
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response.getWriter().write("File not found");
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return;
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}
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byte[] data = Files.readAllBytes(diskPath);
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response.setHeader(HttpHeaders.ACCESS_CONTROL_ALLOW_ORIGIN, "*");
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String mimeType = sf.getMimeType() != null ? sf.getMimeType() : "application/octet-stream";
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response.setContentType(mimeType);
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response.setHeader(HttpHeaders.CACHE_CONTROL, "public, max-age=86400");
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response.setContentLengthLong(data.length);
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response.getOutputStream().write(data);
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response.getOutputStream().flush();
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}
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/**
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* 下载文件 — 触发浏览器下载
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* <p>
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* 与 view 逻辑相同，额外设置 Content-Disposition: attachment 头。
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*/
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@GetMapping("/{id}/download")
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public void download(@PathVariable String id, HttpServletResponse response) throws IOException {
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SysFile sf = fileService.getById(id);
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if (sf == null) { response.setStatus(404); return; }
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Path diskPath = fileService.getDiskPath(sf);
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if (!Files.exists(diskPath)) {
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response.setStatus(404);
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response.getWriter().write("File not found");
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return;
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}
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byte[] data = Files.readAllBytes(diskPath);
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// Content-Disposition: filename=ASCII兜底, filename*=UTF-8编码的原始文件名
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String safeName = "download" + ext(sf.getFileName());
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String encodedName = URLEncoder.encode(sf.getFileName(), StandardCharsets.UTF_8)
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.replace("+", "%20");
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response.setContentType("application/octet-stream");
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response.setHeader(HttpHeaders.CONTENT_DISPOSITION,
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"attachment; filename=\"" + safeName + "\"; filename*=UTF-8''" + encodedName);
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response.setContentLengthLong(data.length);
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response.getOutputStream().write(data);
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response.getOutputStream().flush();
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}
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/** 从文件名提取扩展名（含点） */
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private static String ext(String name) {
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if (name == null) return "";
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int i = name.lastIndexOf('.');
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return i > 0 ? name.substring(i) : "";
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}
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/**
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* 删除文件 — 删磁盘文件 + DB 记录
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*/
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@OperationLog(module = "文件管理", action = "删除")
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@DeleteMapping("/{id}")
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public Result<?> delete(@PathVariable String id) throws IOException {
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fileService.delete(id);
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return Result.ok();
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}
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/** URL 解码 HTTP 头值（网关对中文值做了 URL 编码） */
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private String decodeHeader(String value) {
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if (value == null) return null;
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try {
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return URLDecoder.decode(value, StandardCharsets.UTF_8);
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} catch (Exception e) {
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return value;
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}
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}
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}
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