jsp处理表单上传图片(commons-fileupload-1.2.2.jar,commons-io-2.4.jar)
upload.jsp
1 <%@ page language="java" import="java.util.*" pageEncoding="UTF-8"%> 2 <!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN"> 3 <html> 4 <head> 5 <title>上传图片的表单页面</title> 6 <meta http-equiv="pragma" content="no-cache"> 7 <meta http-equiv="cache-control" content="no-cache"> 8 <meta http-equiv="expires" content="0"> 9 <meta http-equiv="keywords" content="keyword1,keyword2,keyword3"> 10 <meta http-equiv="description" content="This is my page"> 11 </head> 12 <body> 13 <form action="uploaddo.jsp" method="post" enctype="multipart/form-data"> 14 <table> 15 <tr> 16 <td>姓名：</td> 17 <td><input type="text" name="txtUserName" /></td> 18 </tr> 19 <tr> 20 <td>性别：</td> 21 <td> 22 <input type="radio" name="rdoSex" value="男" checked="checked"/>男 23 <input type="radio" name="rdoSex" value="女"/>女 24 </td> 25 </tr> 26 <tr> 27 <td>教育：</td> 28 <td> 29 <select name="selEdu"> 30 <option value="小学">小学</option> 31 <option value="中学">中学</option> 32 <option value="大学">大学</option> 33 </select> 34 </td> 35 </tr> 36 <tr> 37 <td>爱好：</td> 38 <td> 39 <input type="checkbox" name="rdoHibby" value="篮球"/>篮球 40 <input type="checkbox" name="rdoHibby" value="足球"/>足球 41 <input type="checkbox" name="rdoHibby" value="排球"/>排球 42 </td> 43 </tr> 44 <tr> 45 <td>图片：</td> 46 <td><input type="file" name="txtPhoto" /></td> 47 </tr> 48 <tr> 49 <td colspan="2"> 50 <input type="submit" value="提交"/> 51 </td> 52 </tr> 53 </table> 54 </form> 55 </body> 56 </html>
uploaddo.jsp
1 <%@ page language="java" pageEncoding="UTF-8"%> 2 <%@ page import="java.util.*,java.io.*,java.lang.*" %> 3 <%@ page import="org.apache.commons.fileupload.*"%> 4 <%@ page import="org.apache.commons.fileupload.disk.*"%> 5 <%@ page import="org.apache.commons.fileupload.servlet.*"%> 6 <% 7 HashMap<String,ArrayList<String>> mapField =new HashMap<String,ArrayList<String>>(); 8 HashMap<String,ArrayList<String>> mapFile =new HashMap<String,ArrayList<String>>(); 9 request.setCharacterEncoding("utf-8"); 10 response.setCharacterEncoding("utf-8"); 11 boolean isMultipart = ServletFileUpload.isMultipartContent(request); 12 if (isMultipart) { 13 try { 14 DiskFileItemFactory factory = new DiskFileItemFactory(); 15 factory.setSizeThreshold(1024 * 4);//设置缓冲区4kb 16 String bufferFilePath = request.getSession().getServletContext().getRealPath("temp/buffer"); 17 factory.setRepository(new File(bufferFilePath));//设置上传文件用到临时文件存放路径 18 ServletFileUpload upload = new ServletFileUpload(factory); 19 upload.setFileSizeMax(1024 * 1024 * 3);//设置单个文件的最大限制 20 List<FileItem> items = upload.parseRequest(request); 21 Iterator<FileItem> iter = items.iterator(); 22 while (iter.hasNext()) { 23 FileItem item = iter.next(); 24 String fieldName = item.getFieldName();//获取name 25 if (item.isFormField()) { 26 //如果是表单字段 27 String fieldValue = item.getString("utf-8");//获取value 28 ArrayList<String> list = null; 29 if(mapField.containsKey(fieldName)){ 30 list = mapField.get(fieldName); 31 }else{ 32 list = new ArrayList<String>(); 33 } 34 list.add(fieldValue); 35 mapField.put(fieldName, list); 36 } else { 37 //如果是上传控件 38 String uploadFileName = item.getName();//读取上传图片文件名称 39 if (uploadFileName != null && !uploadFileName.equals("")) { 40 String uuid = UUID.randomUUID().toString(); 41 String fileType = uploadFileName.substring(uploadFileName.lastIndexOf(".")); 42 String fileName = "upload/" + uuid + fileType; 43 String uploadFilePath = request.getSession().getServletContext().getRealPath("/"); 44 File saveFile = new File(uploadFilePath, fileName); 45 item.write(saveFile);//保存上传图片到服务器 46 ArrayList<String> list = null; 47 if(mapFile.containsKey(fieldName)){ 48 list = mapFile.get(fieldName); 49 }else{ 50 list = new ArrayList<String>(); 51 } 52 list.add(fileName); 53 mapFile.put(fieldName, list); 54 } 55 } 56 } 57 } catch (FileUploadBase.FileSizeLimitExceededException ex) { 58 out.print("上传文件失败，文件超过3M。"); 59 } catch (FileUploadBase.IOFileUploadException ex) { 60 out.print("设置上传文件用到临时文件存放路径不存在。"); 61 } catch (Exception ex) { 62 out.print(ex); 63 } 64 } 65 %> 66 <!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN"> 67 <html> 68 <head> 69 <title>处理上传图片的表单页面</title> 70 <meta http-equiv="pragma" content="no-cache"> 71 <meta http-equiv="cache-control" content="no-cache"> 72 <meta http-equiv="expires" content="0"> 73 <meta http-equiv="keywords" content="keyword1,keyword2,keyword3"> 74 <meta http-equiv="description" content="This is my page"> 75 </head> 76 <body> 77 <% 78 for(Map.Entry<String,ArrayList<String>> field : mapField.entrySet()) 79 { 80 String key = field.getKey(); 81 List<String> values = field.getValue(); 82 StringBuffer sb = new StringBuffer(); 83 for(String value : values){ 84 sb.append(value); 85 sb.append(","); 86 } 87 String value = sb.toString(); 88 out.print(String.format("name:%s, value:%s<br/>",key,value)); 89 } 90 %> 91 <hr/> 92 <% 93 for(ArrayList<String> values : mapFile.values()) 94 { 95 for(String value : values){ 96 out.print(String.format("<img src='%s' style='width:300px;heigth:300px'/><br/>",value)); 97 } 98 } 99 %> 100 </body> 101 </html>
