package com.example.test1.service;
import com.example.test1.component.WordToHtmlConverter;
import com.jcraft.jsch.;
import org.apache.poi.xwpf.usermodel.;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import org.springframework.web.multipart.MultipartFile;
import java.io.;
import java.nio.file.;
import java.util.UUID;
@Service
public class FileProcessingService {
// 远程服务器配置 private static final String REMOTE_HOST = “”; private static final int REMOTE_PORT = ; private static final String REMOTE_USER = “”; private static final String REMOTE_PASSWORD = “#”; private static final String REMOTE_BASE_DIR = “////”; private static final String BASE_URL = “/images/”; private static final String LOCAL_TEMP_DIR = System.getProperty
(“java.io.tmpdir”
) + “/service_files/”; public String processInput
(Object input
) throws Exception { if
(input instanceof String
) { return processText
((String
) input
); } else if
(input instanceof MultipartFile
) { return processFile
((MultipartFile
) input
); } throw new IllegalArgumentException
(“Unsupported input type”
); } private String processText
(String text
) { // 转义HTML特殊字符 String escapedText = escapeHtml
(text
); // 保留换行符 - 将换行符转换为
标签 String withBreaks = escapedText.replace
(“\n”, “
”
); // 直接返回HTML内容 return “
” + withBreaks + “
”; } private String processFile
(MultipartFile file
) throws Exception { String originalName = file.getOriginalFilename
(); if
(originalName == null
) throw new IllegalArgumentException
(“Invalid file name”
); String extension = originalName.substring
(originalName.lastIndexOf
(“.”
) + 1
).toLowerCase
(); switch
(extension
) { case “jpg”: case “jpeg”: case “png”: case “gif”: // 生成包含图片引用的HTML String imageUrl = uploadImage
(file.getBytes
(), extension
); return “<img src="” + imageUrl + “" alt="Service Image">”; case “doc”: case “docx”: // 转换Word文档为HTML return convertToHtml
(file.getInputStream
()); default: throw new IllegalArgumentException
(“Unsupported file type: " + extension
); } } /** * 上传图片到远程服务器 * @
param imageData 图片字节数组 * @
param extension 文件扩展名 * @return 图片URL */ public String uploadImage
(byte[] imageData, String extension
) throws Exception { String fileName = “img_” + UUID.randomUUID
() + “.” + extension; Path tempPath = saveTempFile
(imageData, fileName
); uploadViaSftp
(tempPath, fileName
); return BASE_URL + fileName; } private void uploadViaSftp
(Path localPath, String remoteFileName
) throws Exception { JSch jsch = new JSch
();
Session session = jsch.
getSession(REMOTE_USER, REMOTE_HOST, REMOTE_PORT
);
session.setPassword
(REMOTE_PASSWORD
);
session.setConfig
(“StrictHostKeyChecking”, “no”
);
session.connect
(); ChannelSftp channel =
(ChannelSftp
) session.openChannel
(“sftp”
); channel.connect
(); // 确保远程目录存在 try { channel.cd
(REMOTE_BASE_DIR
); } catch
(SftpException e
) { channel.mkdir
(REMOTE_BASE_DIR
); channel.cd
(REMOTE_BASE_DIR
); } // 上传文件 channel.put
(localPath.toString
(), remoteFileName
); // 清理本地文件 Files.deleteIfExists
(localPath
); channel.disconnect
();
session.disconnect
(); } private Path saveTempFile
(byte[] data, String fileName
) throws IOException { Path dirPath = Paths.get
(LOCAL_TEMP_DIR
); if
(!Files.exists
(dirPath
)) { Files.createDirectories
(dirPath
); } Path filePath = dirPath.resolve
(fileName
); Files.write
(filePath, data
); return filePath; } public String convertToHtml
(InputStream docxStream
) throws Exception { try
(XWPFDocument document = new XWPFDocument
(docxStream
)) { StringBuilder htmlBuilder = new StringBuilder
(); htmlBuilder.append
(”“
); // 处理段落 for
(XWPF
Paragraph
paragraph : document.get
Paragraphs
()) { htmlBuilder.append
(process
Paragraph
(paragraph
)); } // 处理表格 for
(XWPFTable table : document.getTables
()) { htmlBuilder.append
(processTable
(table
)); } htmlBuilder.append
(”“
); return htmlBuilder.toString
(); } } private String process
Paragraph
(XWPF
Paragraph
paragraph
) throws Exception { StringBuilder
paraBuilder = new StringBuilder
();
boolean isFirstRun = true; for
(XWPFRun run :
paragraph.getRuns
()) { String text = run.getText
(0
); // 处理图片 if
(run.getEmbeddedPictures
().size
() > 0
) { for
(XWPFPicture picture : run.getEmbeddedPictures
()) { XWPFPictureData picData = picture.getPictureData
(); // 上传图片并获取URL String imageUrl = uploadImage
( picData.getData
(), picData.suggestFileExtension
() );
paraBuilder.append
(”<img src="“
).append
(imageUrl
).append
(”" alt="">“
); } } if
(text != null && !text.trim
().isEmpty
()) { // 处理换行符 String processedText = text.replace
(”\n", “
”
); // 处理文本样式 if
(run.isBold
()) paraBuilder.append
(“”
); if
(run.isItalic
()) paraBuilder.append
(“”
);
paraBuilder.append
(escapeHtml
(processedText
)); if
(run.isItalic
()) paraBuilder.append
(“”
); if
(run.isBold
()) paraBuilder.append
(“”
); } // 检测换行符（Word中的硬回车） if
(run.getCTR
().getBrArray
().length > 0
) {
paraBuilder.append
(“
”
); } isFirstRun = false; } // 如果是空段落，保留换行效果 if
(paraBuilder.length
() == 0
) { return “
”; } return “
” +
paraBuilder.toString
() + “
”; } private String processTable
(XWPFTable table
) throws Exception { StringBuilder tableBuilder = new StringBuilder
(“<table border="1">”
); for
(XWPFTableRow row : table.getRows
()) { tableBuilder.append
(“”
); for
(XWPFTableCell cell : row.getTableCells
()) { tableBuilder.append
(“”
); for
(XWPF
Paragraph
para : cell.get
Paragraphs
()) { tableBuilder.append
(process
Paragraph
(para)); } tableBuilder.append
(“”
); } tableBuilder.append
(“”
); } tableBuilder.append
(“”
); return tableBuilder.toString
(); } private String escapeHtml
(String text
) { return text.replace
(“&”, “&”
) .replace
(“<”, “<”
) .replace
(“>”, “>”
) .replace
(“"”, “"”
) .replace
(“'”, “'”
); }
}修改之前的解决方案，支持文体和图片同时传入，且图片支持多图片传入，转为HTML。保留word上传转为HTML功能。图片都存入服务器
本文解析了HTTP请求中getSession方法的功能及使用场景。详细介绍了getSession(boolean create)如何根据参数决定是否创建新的HttpSession，以及其在不同情况下的行为表现。
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