Java PDF文档上传到服务器涉及代码

上传Java PDF文档到服务器的代码可以分为两个步骤：文件上传和文件保存。下面是一个简单的示例代码：

文件上传：

@PostMapping("/upload")
public String handleFileUpload(@RequestParam("file") MultipartFile file) {
    try {
        // 获取文件名
        String fileName = StringUtils.cleanPath(file.getOriginalFilename());

        // 保存文件到服务器
        String uploadDir = "/path/to/upload/directory";
        Path uploadPath = Paths.get(uploadDir);
        if (!Files.exists(uploadPath)) {
            Files.createDirectories(uploadPath);
        }
        try (InputStream inputStream = file.getInputStream()) {
            Path filePath = uploadPath.resolve(fileName);
            Files.copy(inputStream, filePath, StandardCopyOption.REPLACE_EXISTING);
        }

        return "File uploaded successfully!";
    } catch (IOException ex) {
        return "Error uploading file: " + ex.getMessage();
    }
}

文件保存：

public void saveFileToDatabase(String fileName, byte[] fileContent) {
    try {
        // 保存文件到数据库
        String jdbcUrl = "jdbc:mysql://localhost:3306/mydb";
        String username = "myuser";
        String password = "mypassword";
        Class.forName("com.mysql.jdbc.Driver");
        try (Connection conn = DriverManager.getConnection(jdbcUrl, username, password)) {
            String sql = "INSERT INTO files (name, content) VALUES (?, ?)";
            try (PreparedStatement stmt = conn.prepareStatement(sql)) {
                stmt.setString(1, fileName);
                stmt.setBytes(2, fileContent);
                stmt.executeUpdate();
            }
        }
    } catch (ClassNotFoundException | SQLException ex) {
        ex.printStackTrace();
    }
}

注意，以上代码仅仅是示例代码，需要根据实际情况进行修改和完善。