JQeruy.Uploadify 文件上传

upload.java

package servlet;  
      
    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;  
      
    @SuppressWarnings("serial")  
    public class Upload extends HttpServlet {  
        @SuppressWarnings("unchecked")  
        public void doPost(HttpServletRequest request, HttpServletResponse response)  
                throws ServletException, IOException {  
            String savePath = this.getServletConfig().getServletContext()  
                    .getRealPath("");  
            savePath = savePath + "/uploads/";  
            File f1 = new File(savePath);  
            System.out.println(savePath);  
            if (!f1.exists()) {  
                f1.mkdirs();  
            }  
            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;  
            }  
            Iterator<FileItem> it = fileList.iterator();  
            String name = "";  
            String extName = "";  
            while (it.hasNext()) {  
                FileItem item = it.next();  
                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;  
                    }  
                    //扩展名格式：    
                    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);  
        }  
    }

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>Uploadify</title>  
            <link href="css/default.css" mce_href="css/default.css" rel="stylesheet" type="text/css" />  
            <link href="css/uploadify.css" mce_href="css/uploadify.css" rel="stylesheet" type="text/css" />  
            <mce:script type="text/javascript" src="js/jquery-1.3.2.min.js" mce_src="js/jquery-1.3.2.min.js"></mce:script>  
            <mce:script type="text/javascript" src="js/swfobject.js" mce_src="js/swfobject.js"></mce:script>  
            <mce:script type="text/javascript" src="js/jquery.uploadify.v2.0.1.js" mce_src="js/jquery.uploadify.v2.0.1.js"></mce:script>  
            <mce:script type="text/javascript"><!--  
            $(document).ready(function() {  
                $("#uploadify").uploadify({  
                    'uploader'       : 'uploadify.swf',  
                    'script'         : 'servlet/Upload',  
                    'cancelImg'      : 'images/cancel.png',  
                    'folder'         : 'uploads',  
                    'queueID'        : 'fileQueue',  
                    'auto'           : false,  
                    'multi'          : true,  
                    'simUploadLimit' : 2,  
                    'buttonText'     : 'BROWSE'  
                });  
            });  
              
    // --></mce:script>  
        </head>  
        <body>  
            <div id="fileQueue"></div>  
            <input type="file" name="uploadify" id="uploadify" />  
            <p>  
            <a href="javascript:jQuery('#uploadify').uploadifyUpload()" mce_href="javascript:jQuery('#uploadify').uploadifyUpload()">开始上传</a>   
            <a href="javascript:jQuery('#uploadify').uploadifyClearQueue()" mce_href="javascript:jQuery('#uploadify').uploadifyClearQueue()">取消所有上传</a>  
            </p>  
        </body>  
    </html>

web.xml

<?xml version="1.0" encoding="UTF-8"?>  
    <web-app version="2.4" xmlns="http://java.sun.com/xml/ns/j2ee"  
        xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"  
        xsi:schemaLocation="http://java.sun.com/xml/ns/j2ee   
        http://java.sun.com/xml/ns/j2ee/web-app_2_4.xsd">  
        <servlet>  
            <servlet-name>Upload</servlet-name>  
            <servlet-class>servlet.Upload</servlet-class>  
        </servlet>  
        <servlet-mapping>  
            <servlet-name>Upload</servlet-name>  
            <url-pattern>/servlet/Upload</url-pattern>  
        </servlet-mapping>  
        <welcome-file-list>  
            <welcome-file>index.jsp</welcome-file>  
        </welcome-file-list>  
    </web-app>
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原文地址：https://www.cnblogs.com/Irving/p/2849074.html