65 lines
2.2 KiB
Java
65 lines
2.2 KiB
Java
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package com.seeyon.apps.assetstenant.file;
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import com.seeyon.ctp.common.AppContext;
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import com.seeyon.ctp.common.filemanager.manager.AttachmentManager;
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import com.seeyon.ctp.common.filemanager.manager.FileManager;
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import com.seeyon.ctp.common.po.filemanager.Attachment;
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import javax.servlet.http.HttpServletResponse;
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import java.io.BufferedOutputStream;
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import java.io.File;
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import java.io.InputStream;
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import java.io.OutputStream;
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import java.net.URLEncoder;
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public class FileHandlerService {
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private AttachmentManager attachmentManager = (AttachmentManager) AppContext.getBean("attachmentManager");
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private FileManager fileManager = (FileManager) AppContext.getBean("fileManager");
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public void handleFile(String refId, HttpServletResponse response) throws Exception {
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InputStream inputStream = null;
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try {
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Attachment attachment = attachmentManager.getAttachmentByFileURL(Long.valueOf(refId));
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inputStream = fileManager.getFileInputStream(attachment.getFileUrl());
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// ⭐ 关键：重置
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response.reset();
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// ⭐ 必须设置类型
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response.setContentType("application/octet-stream");
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// ⭐ 文件名处理
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String encodedFileName = URLEncoder.encode(attachment.getFilename(), "UTF-8")
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.replaceAll("\\+", "%20");
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response.setHeader("Access-Control-Expose-Headers", "Content-Disposition");
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response.setHeader(
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"Content-Disposition",
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"attachment; filename=\"" + attachment.getFilename() + "\"; filename*=UTF-8''" + encodedFileName
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);
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// ⭐ 输出流
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OutputStream outputStream = response.getOutputStream();
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byte[] buffer = new byte[2048];
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int len;
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while ((len = inputStream.read(buffer)) != -1) {
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outputStream.write(buffer, 0, len);
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}
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outputStream.flush();
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} catch (Exception e) {
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e.printStackTrace(); // ❗不要吞异常
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} finally {
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try {
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if (inputStream != null) inputStream.close();
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} catch (Exception ignored) {}
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}
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}
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}
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