一、先创建一个简单的web项目
二、插件的准备
1、去uploadify的官网下载一个uploadify插件,然后解压新建个js文件夹放进去(这个不强求，只要路径对了就可以)
2、准备所需要的后端处理上传文件的jar包:commons-fileupload-1.2.1.jar
三、新建一个JSP即index.jsp +servlet即UploadServlet.java
四、花几分钟对这些简单的配置完成后就可以看看index.jsp与UoloadServlet.java
1.index.jsp
<%@ page language=”java” import=”java.util.*” pageEncoding=”UTF-8″%>
<%
String path = request.getContextPath();
String basePath = request.getScheme()+”://”+request.getServerName()+”:”+request.getServerPort()+path+”/”;
%>
<!DOCTYPE HTML PUBLIC “-//W3C//DTD HTML 4.01 Transitional//EN”>
<html>
<head>
<base href=”<%=basePath%>”>
<title>My JSP ‘index.jsp’ starting page</title>
<meta http-equiv=”pragma” content=”no-cache”>
<meta http-equiv=”cache-control” content=”no-cache”>
<meta http-equiv=”expires” content=”0″>
<meta http-equiv=”keywords” content=”keyword1,keyword2,keyword3″>
<meta http-equiv=”description” content=”This is my page”>
<meta http-equiv=”Content-Type” content=”text/html; charset=UTF-8″>
<link rel=”stylesheet” type=”text/css” href=”css/uploadify.css”>
<script src=”<%=basePath%>js/uploadify/jquery-1.4.2.min.js”></script>
<script src=”<%=basePath%>js/uploadify/jquery.uploadify.v2.1.4.min.js”></script>
<script src=”<%=basePath%>js/uploadify/swfobject.js”></script>
</head>
<body>
This is my JSP page.
<br>
<table class=”stable tp0″ cellSpacing=”0″ cellPadding=”0″ border=”0″>
<tr>
<td width=”15%” align=”left” colspan=”4″ style=”padding-left: 158px”>
<input type=”hidden” id=”fileSize” value=”0″ />
<div id=”custom-queue”></div> 附件：<input id=”uploadify” type=”file”
name=”Filedata” />
</td>
</tr>
</table>
</body>
<script type=”text/javascript”>
$(document).ready(function(){
$(document).ready(function () {
$(“#uploadify”).uploadify({
‘uploader’: ‘<%=basePath%>js/uploadify/uploadify.swf’,
‘script’: ‘<%=basePath%>servlet/UploadServlet’,
‘cancelImg’: ‘<%=basePath%>js/uploadify/cancel.png’,
‘folder’: ‘upload’,
‘queueID’ : ‘custom-queue’,
‘auto’:true,
‘multi’:true,
‘fileDataName’:’Filedata’,
‘onCancel’ : function(file) {
},
‘onUploadError’ : function(file, errorCode, errorMsg, errorString) {
alert(456);
}
});
});
});
</script>
</html>
2.UoloadServlet.java
import java.io.File;
import java.io.IOException;
import java.util.Iterator;
import java.util.List;
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.FileItem;
import org.apache.commons.fileupload.FileUploadException;
import org.apache.commons.fileupload.disk.DiskFileItemFactory;
import org.apache.commons.fileupload.servlet.ServletFileUpload;
public class UploadServlet extends HttpServlet {
@Override
protected void doPost(HttpServletRequest request,
HttpServletResponse response) throws Exception {
String savePath = this.getServletConfig().getServletContext().getRealPath(“”);
//保存文件的路径
savePath = savePath + “/upload/”;
File f1 = new File(savePath);
System.out.println(savePath);
//如果文件不存在,就新建一个
if (!f1.exists()) {
f1.mkdirs();
}
//这个是文件上传需要的类
DiskFileItemFactory fac = new DiskFileItemFactory();
ServletFileUpload upload = new ServletFileUpload(fac);
upload.setHeaderEncoding(“utf-8”);
List fileList = null;
try {
fileList = upload.parseRequest(request);
} catch (FileUploadException ex) {
return;
}
//迭代器,搜索前端发送过来的文件
Iterator<FileItem> it = fileList.iterator();
String name = “”;
String extName = “”;
while (it.hasNext()) {
FileItem item = it.next();
//判断该表单项是否是普通类型
if (!item.isFormField()) {
name = item.getName();
long size = item.getSize();
String type = item.getContentType();
System.out.println(size + ” ” + type);
if (name == null || name.trim().equals(“”)) {
continue;
}
//extName就是文件的后缀
if (name.lastIndexOf(“.”) >= 0) {
extName = name.substring(name.lastIndexOf(“.”));
}
File file = null;
do {
// 生成文件名：
name = UUID.randomUUID().toString();
file = new File(savePath + name + extName);
} while (file.exists());
File saveFile = new File(savePath + name + extName);
try {
item.write(saveFile);
} catch (Exception e) {
e.printStackTrace();
}
}
}
response.getWriter().print(name + extName);
}
}
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原创文章，作者：奋斗，如若转载，请注明出处：https://blog.ytso.com/14717.html