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@ -1,305 +0,0 @@ |
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package com.canvas.web.utils; |
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import com.canvas.web.config.UploadFileConfig; |
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import org.apache.commons.fileupload.FileItem; |
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import org.apache.commons.fileupload.FileUploadException; |
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import org.apache.commons.fileupload.disk.DiskFileItemFactory; |
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import org.apache.commons.fileupload.servlet.ServletFileUpload; |
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import javax.servlet.http.HttpServletRequest; |
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import java.io.File; |
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import java.io.IOException; |
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import java.text.SimpleDateFormat; |
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import java.util.*; |
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public class UploadUtils { |
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// 表单字段常量 |
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public static final String FORM_FIELDS = "form_fields"; |
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// 文件域常量 |
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public static final String FILE_FIELDS = "file"; |
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// 定义允许上传的文件扩展名 |
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private Map<String, String> extMap = new HashMap<String, String>(); |
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// 文件保存目录路径 |
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private String uploadPath = UploadFileConfig.uploadFolder; |
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// 文件的目录名 |
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private String dirName = "images"; |
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// 上传临时路径 |
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private static final String TEMP_PATH = "temp"; |
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// 临时存相对路径 |
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private String tempPath = uploadPath + TEMP_PATH; |
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// 单个文件最大上传大小(10M) |
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private long fileMaxSize = 1024 * 1024 * 10; |
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// 最大文件大小(100M) |
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private long maxSize = 1024 * 1024 * 100; |
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// 文件保存目录url |
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private String saveUrl; |
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// 文件最终的url包括文件名 |
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private List<String> fileUrl = new ArrayList<>(); |
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/** |
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* 构造函数 |
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*/ |
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public UploadUtils() { |
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// 其中images,flashs,medias,files,对应文件夹名称,对应dirName |
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// key文件夹名称 |
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// value该文件夹内可以上传文件的后缀名 |
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extMap.put("images", "gif,jpg,jpeg,png,bmp"); |
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extMap.put("flashs", "swf,flv"); |
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extMap.put("medias", "swf,flv,mp3,wav,wma,wmv,mid,avi,mpg,asf,rm,rmvb"); |
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extMap.put("files", "doc,docx,xls,xlsx,ppt,htm,html,txt,zip,rar,gz,bz2"); |
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} |
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/** |
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* 文件上传 |
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* |
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* @param request |
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* @return |
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*/ |
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@SuppressWarnings("unchecked") |
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public Map<String, Object> uploadFile(HttpServletRequest request, String name) { |
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// 验证文件并返回错误信息 |
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String error = this.validateFields(request, name); |
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// 初始化表单元素 |
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Map<String, Object> fieldsMap = new HashMap<String, Object>(); |
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if (error.equals("")) { |
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fieldsMap = this.initFields(request); |
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} |
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List<FileItem> fiList = (List<FileItem>) fieldsMap.get(UploadUtils.FILE_FIELDS); |
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if (fiList != null) { |
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for (FileItem item : fiList) { |
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// 上传文件并返回错误信息 |
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error = this.saveFile(item); |
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} |
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} |
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// 返回结果 |
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Map<String, Object> result = new HashMap<>(); |
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result.put("error", error); |
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result.put("image", this.fileUrl); |
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return result; |
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} |
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/** |
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* 上传验证并初始化目录 |
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* |
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* @param request |
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* @return |
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*/ |
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private String validateFields(HttpServletRequest request, String name) { |
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String errorInfo = ""; |
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// 获取内容类型 |
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String contentType = request.getContentType(); |
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int contentLength = request.getContentLength(); |
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// 初始化上传路径，不存在则创建 |
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File uploadDir = new File(uploadPath); |
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// 目录不存在则创建 |
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if (!uploadDir.exists()) { |
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uploadDir.mkdirs(); |
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} |
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if (contentType == null || !contentType.startsWith("multipart")) { |
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// TODO |
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System.out.println("请求不包含multipart/form-data流"); |
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errorInfo = "请求不包含multipart/form-data流"; |
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} else if (maxSize < contentLength) { |
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// TODO |
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System.out.println("上传文件大小超出文件最大大小"); |
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errorInfo = "上传文件大小超出文件最大大小[" + maxSize + "]"; |
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} else if (!ServletFileUpload.isMultipartContent(request)) { |
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// TODO |
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errorInfo = "请选择文件"; |
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} else if (!uploadDir.isDirectory()) { |
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// TODO |
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errorInfo = "上传目录[" + uploadPath + "]不存在"; |
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} else if (!uploadDir.canWrite()) { |
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// TODO |
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errorInfo = "上传目录[" + uploadPath + "]没有写权限"; |
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} else if (!extMap.containsKey(dirName)) { |
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// TODO |
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errorInfo = "目录名不正确"; |
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} else { |
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// 上传路径 |
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uploadPath += dirName + "/" + name + "/"; |
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// 保存目录Url |
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saveUrl = dirName + "/" + name + "/"; |
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// 创建一级目录 |
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File saveDirFile = new File(uploadPath); |
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if (!saveDirFile.exists()) { |
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saveDirFile.mkdirs(); |
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} |
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// 创建二级目录(格式：年月日) |
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SimpleDateFormat sdf = new SimpleDateFormat("yyyyMMdd"); |
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String ymd = sdf.format(new Date()); |
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uploadPath += ymd + "/"; |
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saveUrl += ymd + "/"; |
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File dirFile = new File(uploadPath); |
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if (!dirFile.exists()) { |
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dirFile.mkdirs(); |
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} |
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// 创建上传临时目录 |
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File file = new File(tempPath); |
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if (!file.exists()) { |
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file.mkdirs(); |
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} |
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} |
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return errorInfo; |
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} |
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/** |
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* 处理上传内容 |
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* |
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* @return |
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*/ |
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// @SuppressWarnings("unchecked") |
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private Map<String, Object> initFields(HttpServletRequest request) { |
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// 存储表单字段和非表单字段 |
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Map<String, Object> map = new HashMap<String, Object>(); |
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// 第一步：判断request |
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boolean isMultipart = ServletFileUpload.isMultipartContent(request); |
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// 第二步：解析request |
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if (isMultipart) { |
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// 设置环境:创建一个DiskFileItemFactory工厂 |
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DiskFileItemFactory factory = new DiskFileItemFactory(); |
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// 阀值,超过这个值才会写到临时目录,否则在内存中 |
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factory.setSizeThreshold(1024 * 1024 * 10); |
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// 设置上传文件的临时目录 |
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factory.setRepository(new File(tempPath)); |
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// 核心操作类:创建一个文件上传解析器。 |
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ServletFileUpload upload = new ServletFileUpload(factory); |
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// 设置文件名称编码(解决上传"文件名"的中文乱码) |
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upload.setHeaderEncoding("UTF-8"); |
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// 限制单个文件上传大小 |
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upload.setFileSizeMax(fileMaxSize); |
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// 限制总上传文件大小 |
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upload.setSizeMax(maxSize); |
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// 使用ServletFileUpload解析器解析上传数据，解析结果返回的是一个List<FileItem>集合，每一个FileItem对应一个Form表单的输入项 |
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List<FileItem> items = null; |
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try { |
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items = upload.parseRequest(request); |
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} catch (FileUploadException e) { |
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// TODO Auto-generated catch block |
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e.printStackTrace(); |
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} |
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// 第3步：处理uploaded items |
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if (items != null && items.size() > 0) { |
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Iterator<FileItem> iter = items.iterator(); |
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// 文件域对象 |
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List<FileItem> list = new ArrayList<FileItem>(); |
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// 表单字段 |
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Map<String, String> fields = new HashMap<String, String>(); |
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while (iter.hasNext()) { |
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FileItem item = iter.next(); |
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// 处理所有表单元素和文件域表单元素 |
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if (item.isFormField()) { |
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// 如果fileitem中封装的是普通输入项的数据（输出名、值） |
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String name = item.getFieldName();// 普通输入项数据的名 |
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String value = item.getString(); |
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fields.put(name, value); |
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} else { |
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//如果fileitem中封装的是上传文件，得到上传的文件名称 |
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// 文件域表单元素 |
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list.add(item); |
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} |
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} |
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map.put(FORM_FIELDS, fields); |
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map.put(FILE_FIELDS, list); |
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} |
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} |
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return map; |
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} |
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/** |
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* 保存文件 |
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* |
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* @param item |
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* @return |
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*/ |
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private String saveFile(FileItem item) { |
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String error = ""; |
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String fileName = item.getName(); |
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String fileExt = fileName.substring(fileName.lastIndexOf(".") + 1).toLowerCase(); |
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if (item.getSize() > maxSize) { // 检查文件大小 |
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// TODO |
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error = "上传文件大小超过限制"; |
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} else if (!Arrays.<String>asList(extMap.get(dirName).split(",")).contains(fileExt)) {// 检查扩展名 |
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error = "上传文件扩展名是不允许的扩展名。\n只允许" + extMap.get(dirName) + "格式。"; |
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} else { |
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// 存储文件重命名 |
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SimpleDateFormat df = new SimpleDateFormat("yyyyMMddHHmmss"); |
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String newFileName = df.format(new Date()) + new Random().nextInt(1000) + "." + fileExt; |
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// 新增值文件数组 |
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String filePath = saveUrl + newFileName; |
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fileUrl.add(filePath); |
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// 写入文件 |
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try { |
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File uploadedFile = new File(uploadPath, newFileName); |
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item.write(uploadedFile); |
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} catch (IOException e) { |
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e.printStackTrace(); |
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System.out.println("上传失败了！！！"); |
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} catch (Exception e) { |
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e.printStackTrace(); |
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} |
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} |
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return error; |
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} |
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/** |
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* *********************get/set方法********************************* |
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*/ |
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public String getSaveUrl() { |
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return saveUrl; |
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} |
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public String getUploadPath() { |
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return uploadPath; |
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} |
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public long getMaxSize() { |
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return maxSize; |
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} |
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public void setMaxSize(long maxSize) { |
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this.maxSize = maxSize; |
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} |
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public Map<String, String> getExtMap() { |
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return extMap; |
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} |
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public void setExtMap(Map<String, String> extMap) { |
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this.extMap = extMap; |
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} |
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public String getDirName() { |
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return dirName; |
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} |
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public void setDirName(String dirName) { |
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this.dirName = dirName; |
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} |
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public String getTempPath() { |
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return tempPath; |
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} |
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public void setTempPath(String tempPath) { |
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this.tempPath = tempPath; |
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} |
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public List getFileUrl() { |
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return fileUrl; |
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} |
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public void setFileUrl(List fileUrl) { |
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this.fileUrl = fileUrl; |
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} |
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} |
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