Java FileUpload.setHeaderEncoding方法代碼示例

import org.apache.commons.fileupload.FileUpload; //導入方法依賴的package包/類
/**
 * Determine an appropriate FileUpload instance for the given encoding.
 * <p>Default implementation returns the shared FileUpload instance
 * if the encoding matches, else creates a new FileUpload instance
 * with the same configuration other than the desired encoding.
 * @param encoding the character encoding to use
 * @return an appropriate FileUpload instance.
 */
protected FileUpload prepareFileUpload(String encoding) {
	FileUpload fileUpload = getFileUpload();
	FileUpload actualFileUpload = fileUpload;

	// Use new temporary FileUpload instance if the request specifies
	// its own encoding that does not match the default encoding.
	if (encoding != null && !encoding.equals(fileUpload.getHeaderEncoding())) {
		actualFileUpload = newFileUpload(getFileItemFactory());
		actualFileUpload.setSizeMax(fileUpload.getSizeMax());
		actualFileUpload.setFileSizeMax(fileUpload.getFileSizeMax());
		actualFileUpload.setHeaderEncoding(encoding);
	}

	return actualFileUpload;
}
 

import org.apache.commons.fileupload.FileUpload; //導入方法依賴的package包/類
/**
 * Determine an appropriate FileUpload instance for the given encoding.
 * <p>Default implementation returns the shared FileUpload instance
 * if the encoding matches, else creates a new FileUpload instance
 * with the same configuration other than the desired encoding.
 * @param encoding the character encoding to use
 * @return an appropriate FileUpload instance.
 */
protected FileUpload prepareFileUpload(String encoding) {
	FileUpload fileUpload = getFileUpload();
	FileUpload actualFileUpload = fileUpload;

	// Use new temporary FileUpload instance if the request specifies
	// its own encoding that does not match the default encoding.
	if (encoding != null && !encoding.equals(fileUpload.getHeaderEncoding())) {
		actualFileUpload = newFileUpload(getFileItemFactory());
		actualFileUpload.setSizeMax(fileUpload.getSizeMax());
		actualFileUpload.setHeaderEncoding(encoding);
	}

	return actualFileUpload;
}
 

import org.apache.commons.fileupload.FileUpload; //導入方法依賴的package包/類
/**
 * @see http://www.oschina.net/code/snippet_698737_13402
 * @param request
 * @return
 * @throws IOException
 */
public static Map<String, Object> uploadFiles(HttpServlet servlet, HttpServletRequest request) {
    Map<String, Object> map = JwUtils.newHashMap();
    Map<String, String> fileMap = JwUtils.newHashMap();
    map.put("file", fileMap);

    DiskFileItemFactory factory = new DiskFileItemFactory();// 創建工廠
    factory.setSizeThreshold(1024 * 1024 * 30);// 設置最大緩衝區為30M

    // 設置緩衝區目錄
    String savePath = servlet.getServletContext().getRealPath("/WEB-INF/temp");
    factory.setRepository(new File(savePath));

    FileUpload upload = new FileUpload(factory);// 獲得上傳解析器
    upload.setHeaderEncoding("UTF-8");// 解決上傳文件名亂碼
    
    try {
        String targetFolderPath = servlet.getServletContext().getRealPath("/WEB-INF/" + ConfigUtils.getProperty("web.files.upload.folder"));
        File targetFolder = new File(targetFolderPath);// 目標文件夾
        if(!targetFolder.exists()) {
            targetFolder.mkdir();
        }
        
        List<FileItem> fileItems = upload.parseRequest(new ServletRequestContext(request));// 解析請求體
        for (FileItem fileItem : fileItems) {
            if (fileItem.isFormField()) {// 判斷是普通表單項還是文件上傳項
                String name = fileItem.getFieldName();// 表單名
                String value = fileItem.getString("UTF-8");// 表單值
                map.put(name, value);
            } else {// 文件上傳項
                String fileName = fileItem.getName();// 獲取文件名
                if (StringUtils.isEmpty(fileName))// 判斷是否上傳了文件
                    continue;

                // 截取文件名
                int index = fileName.lastIndexOf("/");
                if (index > -1) {
                    fileName = fileName.substring(index);
                }

                // 檢查文件是否允許上傳
                index = fileName.lastIndexOf(".");
                if (index > -1 && index < fileName.length() - 1) {
                    String ext = fileName.substring(index + 1).toLowerCase();
                    if (!ConfigUtils.getString("web.files.upload.extension").contains(";" + ext + ";")) {
                        LOGGER.warn("The file {} is not allowed to upload.", fileName);
                        continue;
                    }
                }

                // 生成唯一文件名，保留原文件名
                String newFileName = UUID.randomUUID().toString();
                
                // 將文件內容寫到服務器端
                String targetPath = targetFolderPath + "/" + newFileName;
                File targetFile = new File(targetPath);// 目標文件
                targetFile.createNewFile();
                fileItem.write(targetFile);

                fileItem.delete();// 刪除臨時文件
                fileMap.put(fileName, newFileName);
            }
        }
    } catch (Exception e) {
        e.printStackTrace();
    }
    return map;
}