<%@ page session="false" pageEncoding="UTF-8" contentType="text/html; charset=UTF-8" %> <%@ page import="java.io.*"%> <%@ page import="java.util.*"%> <%@ page import="java.text.*"%> <%@ page import="org.apache.commons.fileupload.*"%> <%@ page import="org.apache.commons.fileupload.disk.*"%> <%@ page import="org.apache.commons.fileupload.servlet.*"%> <%@ page import="org.apache.commons.fileupload.util.*"%> <%@ page import="com.alibaba.fastjson.*"%> <% String contentType = request.getContentType(); if ( contentType.indexOf("multipart/form-data") >= 0 ) { Result result = new Result(); result.avatarUrls = new ArrayList(); result.success = false; result.msg = "Failure!"; String userid; String username; FileItemFactory factory = new DiskFileItemFactory(); ServletFileUpload upload = new ServletFileUpload(factory); FileItemIterator fileItems = upload.getItemIterator(request); //定义一个变量用以储存当前头像的序号 int avatarNumber = 1; //取服务器时间+8位随机码作为部分文件名,确保文件名无重复。 SimpleDateFormat simpleDateFormat = new SimpleDateFormat("yyyyMMddHHmmssS"); String fileName = simpleDateFormat.format(new Date()); Random random = new Random(); String randomCode = ""; for ( int i = 0; i < 8; i++ ) { randomCode += Integer.toString(random.nextInt(36), 36); } fileName = fileName + randomCode; //基于原图的初始化参数 String initParams = ""; BufferedInputStream inputStream; BufferedOutputStream outputStream; //遍历表单域 while( fileItems.hasNext() ) { FileItemStream fileItem = fileItems.next(); String fieldName = fileItem.getFieldName(); //是否是原始图片 file 域的名称(默认的 file 域的名称是__source,可在插件配置参数中自定义。参数名:src_field_name) Boolean isSourcePic = fieldName.equals("__source"); //当前头像基于原图的初始化参数(只有上传原图时才会发送该数据,且发送的方式为POST),用于修改头像时保证界面的视图跟保存头像时一致,提升用户体验度。 //修改头像时设置默认加载的原图url为当前原图url+该参数即可,可直接附加到原图url中储存,不影响图片呈现。 if ( fieldName.equals("__initParams") ) { inputStream = new BufferedInputStream(fileItem.openStream()); byte[] bytes = new byte [inputStream.available()]; inputStream.read(bytes); initParams = new String(bytes, "UTF-8"); inputStream.close(); } //如果是原始图片 file 域的名称或者以默认的头像域名称的部分“__avatar”打头(默认的头像域名称:__avatar1,2,3...,可在插件配置参数中自定义,参数名:avatar_field_names) else if ( isSourcePic || fieldName.startsWith("__avatar") ) { String virtualPath = "uploadFiles/uploadUserPhoto/jsp_avatar" + avatarNumber + "_" + fileName + ".jpg"; //原始图片(默认的 file 域的名称是__source,可在插件配置参数中自定义。参数名:src_field_name)。 if( isSourcePic ) { //文件名,如果是本地或网络图片为原始文件名、如果是摄像头拍照则为 *FromWebcam.jpg String sourceFileName = fileItem.getName(); //原始文件的扩展名(不包含“.”) String sourceExtendName = sourceFileName.substring(sourceFileName.lastIndexOf('.') + 1); result.sourceUrl = virtualPath = String.format("uploadFiles/uploadUserPhoto/jsp_source_%s.%s", fileName, sourceExtendName); } //头像图片(默认的 file 域的名称:__avatar1,2,3...,可在插件配置参数中自定义,参数名:avatar_field_names)。 else { result.avatarUrls.add(virtualPath); avatarNumber++; } inputStream = new BufferedInputStream(fileItem.openStream()); outputStream = new BufferedOutputStream(new FileOutputStream(application.getRealPath("/") + virtualPath)); Streams.copy(inputStream, outputStream, true); inputStream.close(); outputStream.flush(); outputStream.close(); } else { //注释① upload_url中传递的查询参数,如果定义的method为post请使用下面的代码,否则请删除或注释下面的代码块并使用注释②的代码 inputStream = new BufferedInputStream(fileItem.openStream()); byte[] bytes = new byte [inputStream.available()]; inputStream.read(bytes); inputStream.close(); if (fieldName.equals("userid")) { result.userid = new String(bytes, "UTF-8"); } else if (fieldName.equals("username")) { result.username = new String(bytes, "UTF-8"); } } } //注释② upload_url中传递的查询参数,如果定义的method为get请使用下面注释的代码 /* result.userid = request.getParameter("userid"); result.username = request.getParameter("username"); */ if ( result.sourceUrl != null ) { result.sourceUrl += initParams; } result.success = true; result.msg = "Success!"; /* To Do...可在此处处理储存事项 */ //返回图片的保存结果(返回内容为json字符串,可自行构造,该处使用fastjson构造) out.println(JSON.toJSONString(result)); } %> <%! /** * 表示上传的结果。 */ private class Result { /** * 表示图片是否已上传成功。 */ public Boolean success; public String userid; public String username; /** * 自定义的附加消息。 */ public String msg; /** * 表示原始图片的保存地址。 */ public String sourceUrl; /** * 表示所有头像图片的保存地址,该变量为一个数组。 */ public ArrayList avatarUrls; } %>