一.图片上传:
FileUpload是用来实现Java环境下的文件上传功能，与常见的SmartUpload齐名
客户端：
1.form的enctype属性设置为 multipart/form-data，设置该值后，浏览器在上传文件时，将把文件数据附带在Http请求体中，并使用MIME协议对上传文件进行描述，以方便接收方对上传数据进行解析和处理。
2.form的method属性设置为 POST
3.添加文件上传项<input type=“file” ... />
上传步骤：( smartupload)
1.引入jar文件
jspsmartupload.jar
2.实例化上载类
SmartUpload mySmartUpload = new SmartUpload();
3.初始化 (pageContext)
mySmartUpload.initialize(pageContext);
4.准备上传 (没有直接上传呢)
mySmartUpload.upload();
5.保存上传文件 (提交)
mySmartUpload.save("/upup");
•需求：将一张图片上传到服务器的upup文件夹下
文件路径
创建表单上传页面
1 indexTest.jsp表单上传页面 2 3 <%@ page language="java" import="java.util.*" pageEncoding="utf-8"%> 4 <% 5 String path = request.getContextPath(); 6 String basePath = request.getScheme()+"://"+request.getServerName()+":"+request.getServerPort()+path+"/"; 7 %> 8 9 <!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN"> 10 <html> 11 <head> 12 <base href="<%=basePath%>"> 13 14 <title>test上传</title> 15 <meta http-equiv="pragma" content="no-cache"> 16 <meta http-equiv="cache-control" content="no-cache"> 17 <meta http-equiv="expires" content="0"> 18 <meta http-equiv="keywords" content="keyword1,keyword2,keyword3"> 19 <meta http-equiv="description" content="This is my page"> 20 <!-- 21 <link rel="stylesheet" type="text/css" href="styles.css"> 22 --> 23 </head> 24 25 <body> 26 <!-- 上传的表单要这样被封装 --> 27 <form action="up.jsp" method="post" enctype="multipart/form-data"/> 28 请输入:<input type="text" name="name"/><br/> 29 <input type="file" name="file"/> 30 <input type="submit" value="上传"> 31 32 </form> 33 </body> 34 </html>
1 上传流程 2 3 <%@ page language="java" import="java.util.*" pageEncoding="UTF-8"%> 4 <%@ page import="com.jspsmart.upload.*"%> 5 6 7 <% 8 String path = request.getContextPath(); 9 String basePath = request.getScheme() + "://" 10 + request.getServerName() + ":" + request.getServerPort() 11 + path + "/"; 12 %> 13 14 <!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN"> 15 <html> 16 <head> 17 <base href="<%=basePath%>"> 18 19 <title>My JSP 'up.jsp' starting page</title> 20 21 <meta http-equiv="pragma" content="no-cache"> 22 <meta http-equiv="cache-control" content="no-cache"> 23 <meta http-equiv="expires" content="0"> 24 <meta http-equiv="keywords" content="keyword1,keyword2,keyword3"> 25 <meta http-equiv="description" content="This is my page"> 26 <!-- 27 <link rel="stylesheet" type="text/css" href="styles.css"> 28 --> 29 30 </head> 31 32 <body> 33 <% 34 //步骤一：实例化上载bean 35 SmartUpload mySmartUpload = new SmartUpload(); 36 37 //步骤二:初始化 38 mySmartUpload.initialize(pageContext); 39 40 //步骤三：准备上载文件 41 mySmartUpload.upload(); 42 43 //步骤四：保存文件 44 // mySmartUpload.save("/upup"); 45 46 //////////////////////////////////////////////////////////////////// 47 //表单被封装后直接通过request不能获得值 48 // String name=request.getParameter("name"); 49 String name=mySmartUpload.getRequest().getParameter("name"); 50 51 //取得文件扩展名，后缀 52 String ext=mySmartUpload.getFiles().getFile(0).getFileExt(); 53 54 //利用自定义名字上传，保存文件名 getFiles()得到所有file类型数组,可用作批量上传 savaAs()方法用来更改名字 55 // mySmartUpload.getFiles().getFile(0).saveAs("/upup/"+name+"."+ext); 56 57 //利用随机数名字上传，保存文件名 58 String uuid = UUID.randomUUID().toString(); 59 mySmartUpload.getFiles().getFile(0).saveAs("/upup/"+uuid+"."+ext); 60 %> 61 62 <h1>上传成功</h1> 63 64 </body> 65 </html>
1 <%@ page language="java" contentType="text/html; charset=utf-8" pageEncoding="utf-8"%> 2 <%@ page import="java.util.*" %> 3 <%@ page import="java.text.SimpleDateFormat" %> 4 <%@ page import="com.jspsmart.upload.*" %> 5 6 7 <% 8 response.setHeader("Expires","0"); 9 response.setHeader("Pragma","nono-catch"); 10 response.setHeader("Catch-Control","no-cache"); 11 %> 12 13 <% 14 String _contexPath = request.getContextPath(); 15 String ext = ""; 16 17 %> 18 19 <html> 20 <head> 21 <meta http-equiv="Content-Type" content="text/html; charset=utf-8"> 22 <script language="JavaScript" src="<%=_contexPath%>/css/common.js"></script> 23 <title>……</title> 24 </head> 25 <body> 26 <% 27 28 String trace = ""; 29 String filename = ""; 30 try 31 { 32 //实例化上载bean 33 SmartUpload mySmartUpload = new SmartUpload(); 34 35 //初始化 36 mySmartUpload.initialize(pageContext); 37 38 // 设定上传限制 39 // 1.限制每个上传文件的最大值 40 mySmartUpload.setMaxFileSize(500 * 1024 * 1024 * 1024); 41 // 2.限制总上传数据的长度。 42 //mySmartUpload.setTotalMaxFileSize(200000000); 43 // 3.设定允许上传的文件（通过扩展名限制）,仅允许doc,txt文件。 44 //mySmartUpload.setAllowedFilesList("doc,txt"); 45 // 4.设定禁止上传的文件（通过扩展名限制）,禁止上传带有exe,bat,jsp,htm,html扩展名的文件和没有扩展名的文件。 46 //mySmartUpload.setDeniedFilesList("exe,bat,jsp,htm,html,,"); 47 48 //上载文件 49 mySmartUpload.upload(); 50 // 将上传文件全部保存到指定目录 51 //int count = mySmartUpload.save("/upload"); 52 //System.out.println(mySmartUpload.getFiles().getCount() + "个文件上传成功！<br>"); 53 54 //获得Request对象 55 //re1 = (HttpServletRequest)pageContext.getRequest(); 56 //re1 = (HttpServletRequest)mySmartUpload.getRequest(); 57 //String other = mySmartUpload.getRequest().getParameter("other"); 58 59 60 //循环取得所有上载的文件 61 62 for (int i = 0; i < mySmartUpload.getFiles().getCount(); i++) 63 { 64 //取得上载的文件 65 com.jspsmart.upload.File myFile = mySmartUpload.getFiles().getFile(i); 66 67 if (!myFile.isMissing()) 68 { 69 ext = myFile.getFileExt(); 70 //全名（绝对路径+名称） 71 String myFilePath = myFile.getFilePathName(); 72 //取得文件的大小 73 int fileSize = myFile.getSize(); 74 filename = new String(myFile.getFileName().getBytes(),"utf-8"); 75 // System.out.print(filename); 76 //另存路径 77 //String jspPath = application.getRealPath(request.getRequestURI());//本JSP文件的服务器绝对路径 78 String filePath = getServletContext().getRealPath("/imgupload/");//本WEB程序根目录服务器绝对路径 79 80 //filePath += "\UserFiles\Image\"; 81 82 83 //要创建的文件最终保存目录 84 java.io.File file = new java.io.File( filePath ); 85 86 // System.out.println("filepath==="+filePath); 87 88 if(file.exists()) 89 file.mkdirs(); 90 91 92 // trace += ((new SimpleDateFormat("yyyyMMddHHmmss").format(new Date()))+"."+ext);//最终保存路径 93 94 95 // request.setAttribute("Image",trace); 96 // System.out.println("trace==="+filename); 97 98 myFile.saveAs(filePath + "\" + filename); 99 100 // 将文件另存 101 //myFile.saveAs("\upload\" + myFile.getFileName()); 102 // 另存到以WEB应用程序的根目录为文件根目录的目录下 103 //myFile.saveAs("\upload\" + myFile.getFileName(), SmartUpload.SAVE_VIRTUAL); 104 //将文件另存到指定目录(操作系统的目录) 105 //myFile.saveAs(trace, SmartUpload.SAVE_PHYSICAL); 106 } 107 else 108 { 109 // 若文件不存在则继续 110 continue; 111 112 } 113 }//end for 114 }catch(Exception SE){ 115 System.out.println("com.jspsmart.upload.SmartUpload上传期间产生错误！"); 116 } 117 %> 118 <script language='javascript'> 119 alert('上传成功'); 120 </script> 121 <img src="imgupload/<%=filename %>"> 122 </body> 123 </html>
运行结果
