使用uploadify来实现文件上传能够客户端判断文件大小、控制文件上传的类型、实现多文件上传、显示进度条等功能，方便易用，兼容性较好。
本例是把dwz中整合uploadify功能抽取出来的，可以进行单独使用，不一定要遭dwz中才能使用，本例只是为了测试，所以使用静态页面进行测试：
话不多说，代码敬上：
2，html页面的代码
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
<html>
<head>
<title>MyHtml.html</title>
<meta http-equiv="content-type" content="text/html; charset=UTF-8">
<link href="resources/dwz/uploadify/css/uploadify.css" rel="stylesheet" type="text/css" media="screen" />
<script src="resources/dwz/js/jquery-1.7.2.js" type="text/javascript"></script>
<script src="resources/dwz/uploadify/scripts/jquery.uploadify.js" type="text/javascript"></script>
<script src="resources/dwz/uploadify/scripts/errorCode.js" type="text/javascript"></script>
<!--<link rel="stylesheet" type="text/css" href="./styles.css">-->
<style type="text/css" media="screen">
.my-uploadify-button {
background: none;
border: none;
text-shadow: none;
border-radius: 0;
}
.uploadify:hover .my-uploadify-button {
background: none;
border: none;
}
.fileQueue {
width: 400px;
height: 150px;
overflow: auto;
border: 1px solid #E5E5E5;
margin-bottom: 10px;
}
</style>
<script type="text/javascript">
$(function(){
$('#testFileInput').uploadify({
swf:'resources/dwz/uploadify/scripts/uploadify.swf',
uploader:'servlet/uploadify.do',//上传的url
formData:{PHPSESSID:'xxx', ajax:1},
buttonText:'请选择文件',
fileSizeLimit:'200KB',//设置上传大小
fileTypeDesc:'*.jpg;*.jpeg;*.gif;*.png;',
fileTypeExts:'*.jpg;*.jpeg;*.gif;*.png;',//允许的后缀
auto:true,//是否自动上传
multi:true,
overrideEvents: ['onDialogClose', 'onUploadError', 'onSelectError' ],//重新错误信息的显示方法
onSelectError: uploadify_onSelectError,
onUploadError: uploadify_onUploadError,
onUploadSuccess: uploadify_onUploadSuccess
});
$('#testFileInput2').uploadify({
swf:'resources/dwz/uploadify/scripts/uploadify.swf',
uploader:'servlet/uploadify.do',
formData:{PHPSESSID:'xxx', ajax:1},
queueID:'fileQueue',
buttonImage:'resources/dwz/uploadify/img/add.jpg',
buttonClass:'my-uploadify-button',
width:102,
auto:false,
fileSizeLimit:'100KB',
fileTypeDesc:'*.jpg;*.jpeg;*.gif;*.png;',
fileTypeExts:'*.jpg;*.jpeg;*.gif;*.png;',
overrideEvents: [ 'onDialogClose','onUploadError', 'onSelectError' ],
onSelectError: uploadify_onSelectError,
onUploadError: uploadify_onUploadError,
onUploadSuccess: uploadify_onUploadSuccess
});
});
</script>
</head>
<body>
<!-- 单文件上传 -->
<input id="testFileInput" type="file" name="image" />
<div class="divider"></div>
<!-- 多文件上传 -->
<input id="testFileInput2" type="file" name="image2" />
<div id="fileQueue" class="fileQueue"></div>
<input type="image" src="resources/dwz/uploadify/img/upload.jpg" onclick="$('#testFileInput2').uploadify('upload', '*');" />
<input type="image" src="resources/dwz/uploadify/img/cancel.jpg" onclick="$('#testFileInput2').uploadify('cancel', '*');" />
</body>
</html>
3，上传的servlet代码
package uploadFile;
import java.io.File;
import java.io.IOException;
import java.util.Iterator;
import java.util.List;
import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import org.apache.commons.fileupload.FileItem;
import org.apache.commons.fileupload.FileUploadException;
import org.apache.commons.fileupload.disk.DiskFileItemFactory;
import org.apache.commons.fileupload.servlet.ServletFileUpload;
public class UploadFile extends HttpServlet {
@Override
protected void service(HttpServletRequest request, HttpServletResponse response)
throws ServletException, IOException {
super.service(request, response);
}
@Override
protected void doPost(HttpServletRequest req, HttpServletResponse resp)
throws ServletException, IOException {
//临时目录
String basePath = req.getServletContext().getRealPath("upload");
String tempDir = "temp";
File tempFile = new File(basePath + File.separator +tempDir);
if (!tempFile.exists()) {
tempFile.mkdir();
}
DiskFileItemFactory dfc = new DiskFileItemFactory();
dfc.setSizeThreshold(1*1024*1024);//设置临界值
dfc.setRepository(tempFile);//设置临时上传目录
ServletFileUpload upload = new ServletFileUpload(dfc);
upload.setHeaderEncoding("UTF-8");//设置编码
// 设置文件最大值,这里设置5Mb,5*1024*1024;
upload.setSizeMax(5 * 1024 * 1024);
try {
List fileList = upload.parseRequest(req);
Iterator<FileItem> iterator = fileList.iterator();
while (iterator.hasNext()) {
FileItem item = iterator.next();
String fileName = item.getName();//得到文件名
if (fileName != null) {
//System.out.println(fileName);
//System.out.println(item.getSize());
File sourceFile = new File(basePath+File.separator+fileName);
item.write(sourceFile);
}
}
} catch (FileUploadException e) {
e.printStackTrace();
} catch (Exception e) {
e.printStackTrace();
}
//resp.getWriter().print("上传成功！");
}
@Override
protected void doGet(HttpServletRequest req, HttpServletResponse resp)
throws ServletException, IOException {
super.doPost(req, resp);
}
}
4，web.xml配置
<servlet> <servlet-name>upLoadify</servlet-name> <servlet-class>uploadFile.UploadFile</servlet-class> </servlet> <servlet-mapping> <servlet-name>upLoadify</servlet-name> <url-pattern>/servlet/uploadify.do</url-pattern> </servlet-mapping>
5，uploadify的提示信息是英文的，为了显示中文的提示信息，将其错误提示方法进行重新，新建errorCode.js放入在resource/dwz/uploadify/scripts文件夹下面，并在页面进行导入这个js,js代码如下：
var uploadify_onSelectError = function(file, errorCode, errorMsg) {
var msgText = "上传失败\n";
switch (errorCode) {
case SWFUpload.QUEUE_ERROR.QUEUE_LIMIT_EXCEEDED:
//this.queueData.errorMsg = "每次最多上传 " + this.settings.queueSizeLimit + "个文件";
msgText += "每次最多上传 " + this.settings.queueSizeLimit + "个文件";
break;
case SWFUpload.QUEUE_ERROR.FILE_EXCEEDS_SIZE_LIMIT:
msgText += "文件大小超过限制( " + this.settings.fileSizeLimit + " )";
break;
case SWFUpload.QUEUE_ERROR.ZERO_BYTE_FILE:
msgText += "文件大小为0";
break;
case SWFUpload.QUEUE_ERROR.INVALID_FILETYPE:
msgText += "文件格式不正确，仅限 " + this.settings.fileTypeExts;
break;
default:
msgText += "错误代码：" + errorCode + "\n" + errorMsg;
}
alert(msgText);
};
var uploadify_onUploadError = function(file, errorCode, errorMsg, errorString) {
// 手工取消不弹出提示
if (errorCode == SWFUpload.UPLOAD_ERROR.FILE_CANCELLED
|| errorCode == SWFUpload.UPLOAD_ERROR.UPLOAD_STOPPED) {
return;
}
var msgText = "上传失败\n";
switch (errorCode) {
case SWFUpload.UPLOAD_ERROR.HTTP_ERROR:
msgText += "HTTP 错误\n" + errorMsg;
break;
case SWFUpload.UPLOAD_ERROR.MISSING_UPLOAD_URL:
msgText += "上传文件丢失，请重新上传";
break;
case SWFUpload.UPLOAD_ERROR.IO_ERROR:
msgText += "IO错误";
break;
case SWFUpload.UPLOAD_ERROR.SECURITY_ERROR:
msgText += "安全性错误\n" + errorMsg;
break;
case SWFUpload.UPLOAD_ERROR.UPLOAD_LIMIT_EXCEEDED:
msgText += "每次最多上传 " + this.settings.uploadLimit + "个";
break;
case SWFUpload.UPLOAD_ERROR.UPLOAD_FAILED:
msgText += errorMsg;
break;
case SWFUpload.UPLOAD_ERROR.SPECIFIED_FILE_ID_NOT_FOUND:
msgText += "找不到指定文件，请重新操作";
break;
case SWFUpload.UPLOAD_ERROR.FILE_VALIDATION_FAILED:
msgText += "参数错误";
break;
default:
msgText += "文件:" + file.name + "\n错误码:" + errorCode + "\n"
+ errorMsg + "\n" + errorString;
}
alert(msgText);
}
// return parameters;
//}
var uploadify_onUploadSuccess = function(file, data, response) {
alert(file.name + "\n\n上传成功");
};
收工！
原文链接：http://blog.csdn.net/hwt_211/article/details/36888763
以上就是本文的全部内容，希望对大家的学习有所帮助，也希望大家多多支持找一找教程网。
