jsp版xheditor

/** * Copyright 2011 * All Rights Reserved */ package com.xheditor.servlet; import java.io.File; import java.io.IOException; import java.io.PrintWriter; import java.io.Serializable; import java.text.SimpleDateFormat; import java.util.Date; import java.util.HashMap; import java.util.Iterator; import java.util.List; import java.util.Map; import java.util.UUID; import javax.servlet.ServletException; import javax.servlet.http.HttpServlet; import javax.servlet.http.HttpServletRequest; import javax.servlet.http.HttpServletResponse; import org.apache.commons.fileupload.DiskFileUpload; import org.apache.commons.fileupload.FileItem; import org.apache.commons.lang.StringUtils; /** * xhEditor文件上传的Java - Servlet实现. * @author zhuweiliang * */ @SuppressWarnings({ "serial", "deprecation" }) public class UploadFileServlet extends HttpServlet { private static String baseDir = "/ARTICLE_IMG/";//上传文件存储目录 private static String fileExt = "jpg,jpeg,bmp,gif,png"; private static Long maxSize = 0l; // 0:不建目录 1:按天存入目录 2:按月存入目录 3:按扩展名存目录 建议使用按天存 private static String dirType = "1"; /** * 文件上传初始化工作 */ public void init() throws ServletException { /*获取web.xml中servlet的配置文件目录参数*/ baseDir = this.getInitParameter("baseDir"); /*获取文件上传存储的相当路径*/ if (StringUtils.isBlank(baseDir)) baseDir = "/ARTICLE_IMG/"; String realBaseDir = this.getServletConfig().getServletContext().getRealPath(baseDir); File baseFile = new File(realBaseDir); if (!baseFile.exists()) { baseFile.mkdir(); } /*获取文件类型参数*/ fileExt = this.getInitParameter("fileExt"); if (StringUtils.isBlank(fileExt)) fileExt = "jpg,jpeg,gif,bmp,png"; /*获取文件大小参数*/ String maxSize_str = this.getInitParameter("maxSize"); if (StringUtils.isNotBlank(maxSize_str)) maxSize = new Long(maxSize_str); /*获取文件目录类型参数*/ dirType = this.getInitParameter("dirType"); if (StringUtils.isBlank(dirType)) dirType = "1"; if (",0,1,2,3,".indexOf("," + dirType + ",") < 0) dirType = "1"; } /** * 上传文件数据处理过程 */ @SuppressWarnings({"unchecked" }) public void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException { response.setContentType("text/html; charset=UTF-8"); response.setHeader("Cache-Control", "no-cache"); String err = ""; String newFileName = ""; DiskFileUpload upload = new DiskFileUpload(); try { List<FileItem> items = upload.parseRequest(request); Map<String, Serializable> fields = new HashMap<String, Serializable>(); Iterator<FileItem> iter = items.iterator(); while (iter.hasNext()) { FileItem item = (FileItem) iter.next(); if (item.isFormField()) fields.put(item.getFieldName(), item.getString()); else fields.put(item.getFieldName(), item); } /*获取表单的上传文件*/ FileItem uploadFile = (FileItem)fields.get("filedata"); /*获取文件上传路径名称*/ String fileNameLong = uploadFile.getName(); //System.out.println("fileNameLong:" + fileNameLong); /*获取文件扩展名*/ /*索引加1的效果是只取xxx.jpg的jpg*/ String extensionName = fileNameLong.substring(fileNameLong.lastIndexOf(".") + 1); //System.out.println("extensionName:" + extensionName); /*检查文件类型*/ if (("," + fileExt.toLowerCase() + ",").indexOf("," + extensionName.toLowerCase() + ",") < 0){ printInfo(response, "不允许上传此类型的文件", ""); return; } /*文件是否为空*/ if (uploadFile.getSize() == 0){ printInfo(response, "上传文件不能为空", ""); return; } /*检查文件大小*/ if (maxSize > 0 && uploadFile.getSize() > maxSize){ printInfo(response, "上传文件的大小超出限制", ""); return; } //0:不建目录, 1:按天存入目录, 2:按月存入目录, 3:按扩展名存目录.建议使用按天存. String fileFolder = ""; if (dirType.equalsIgnoreCase("1")) fileFolder = new SimpleDateFormat("yyyyMMdd").format(new Date());; if (dirType.equalsIgnoreCase("2")) fileFolder = new SimpleDateFormat("yyyyMM").format(new Date()); if (dirType.equalsIgnoreCase("3")) fileFolder = extensionName.toLowerCase(); /*文件存储的相对路径*/ String saveDirPath = baseDir + fileFolder + "/"; //System.out.println("saveDirPath:" + saveDirPath); /*文件存储在容器中的绝对路径*/ String saveFilePath = this.getServletConfig().getServletContext().getRealPath("") + saveDirPath; //System.out.println("saveFilePath:" + saveFilePath); /*构建文件目录以及目录文件*/ File fileDir = new File(saveFilePath); if (!fileDir.exists()) {fileDir.mkdirs();} /*重命名文件*/ String filename = UUID.randomUUID().toString(); File savefile = new File(saveFilePath + filename + "." + extensionName); /*存储上传文件*/ //System.out.println(upload == null); uploadFile.write(savefile); //这个地方根据项目的不一样，需要做一些特别的定制。 newFileName = "/xheditor" + saveDirPath + filename + "." + extensionName; //System.out.println("newFileName:" + newFileName); } catch (Exception ex) { System.out.println(ex.getMessage()); newFileName = ""; err = "错误: " + ex.getMessage(); } printInfo(response, err, newFileName); } /** * 使用I/O流输出 json格式的数据 * @param response * @param err * @param newFileName * @throws IOException */ public void printInfo(HttpServletResponse response, String err, String newFileName) throws IOException { PrintWriter out = response.getWriter(); //String filename = newFileName.substring(newFileName.lastIndexOf("/") + 1); out.println("{\"err\":\"" + err + "\",\"msg\":\"" + newFileName + "\"}"); out.flush(); out.close(); } }