java多文件上传

灰太狼 2021-12-07 11:15 314阅读 0赞

自己遇到这样的东西 先大概写了一个模型

用的swfupload+struts

或者单独的 swfupload +serverlet

具体的代码 请见：[java多文件上传代码][java]

文件在程序中的位置具体如下：

![点击查看][SouthEast]

必须的包：lib里面的包都是必须的。

索要引用的js 有 jquery和 handlers（主要就是控制文件上传的一些js）和swfupload 和一个必要的flash swupload 这些 官网都有地址是：[swfupload][]。里面也有详细的讲解。

![Image 1][]![Image 1][]

先说  struts的这一种，现在用struts的比较多：

首先建立 Uploadfile文件

package com;
    
    import java.io.File;
    import java.io.FileInputStream;
    import java.io.FileNotFoundException;
    import java.io.FileOutputStream;
    import java.io.IOException;
    import java.io.InputStream;
    import java.io.OutputStream;
    import java.sql.Timestamp;
    
    import javax.servlet.ServletContext;
    
    import org.apache.commons.io.FileUtils;
    import org.apache.commons.lang3.StringUtils;
    import org.apache.struts2.ServletActionContext;
    
    
    
    import com.opensymphony.xwork2.ActionSupport;
    
    public class UploadFile extends ActionSupport {
    	
    	private String message ;
    
    	public String getMessage() {
    		return message;
    	}
    
    	public void setMessage(String message) {
    		this.message = message;
    	}
    	
    	private File files;
    	
    	private String filesFileName;
    	
    	private String filesContentType ;
    	
    	public File getFiles() {
    		return files;
    	}
    
    	public void setFiles(File files) {
    		this.files = files;
    	}
    
    	public String getFilesFileName() {
    		return filesFileName;
    	}
    
    	public void setFilesFileName(String filesFileName) {
    		this.filesFileName = filesFileName;
    	}
    
    	public String getFilesContentType() {
    		return filesContentType;
    	}
    
    	public void setFilesContentType(String filesContentType) {
    		this.filesContentType = filesContentType;
    	}
    
    	 
    	public String getInfo(){
    		setMessage("linlin");
    		return SUCCESS;
    	}
    	
    	/****
    	 * swf上传. 文件名字没有改变
    	 */
    	 public String swfUpload1() throws Exception {
    		 
    	        // 实现上传
    	        InputStream is = new FileInputStream(files);
    	        /**获取路径**/
    	        String root =ServletActionContext.getServletContext().getRealPath("");
    	        /**分隔符**/
    			String separator = java.io.File.separator;
    			/**存储路径**/
    			String path = root+separator+"upload" +separator+"file"+separator;
    			System.out.println("---上传文件地址---"+path);
    			//获取时间戳
    			long time = System.currentTimeMillis();
    	        File deskFile = new File(root, this.getFilesFileName());
    	        System.out.println("--文件名字--"+this.getFilesFileName());
    	        OutputStream os = new FileOutputStream(deskFile);
    	        byte[] bytefer = new byte[1024];
    	        int length = 0;
    	        while ((length = is.read(bytefer)) != -1) {
    	            os.write(bytefer, 0, length);
    	        }
    	        os.close();
    	        is.close();
    	        return "success";
    	    }
    	 	/****
    		 * 使用FileUtils.copyFile的上传
    		 * @return
    		 */
    		public String loadFile(){
    			/**当前时间戳**/
    			Timestamp currentTime = new Timestamp(System.currentTimeMillis());
    			ServletContext servletContext = ServletActionContext.getServletContext(); 
    			/**获取路径**/
    		    String dataDir = servletContext.getRealPath(""); 
    			long time = System.currentTimeMillis();
    			/**分隔符**/
    			String separator = java.io.File.separator;
    			/**判断上传文件是否为空**/
    			if(null == files){
    				/**若文件为空 则 报错**/
    				return "文件为空！";
    			}else{
    				// 判断数据是否正确
    				// 文件后缀名
    				int index = StringUtils.lastIndexOf(filesFileName, '.');
    				if (index == -1) {
    					return "文件类型错误！";
    				}
    				/**获取文件后缀名**/
    				String extFileName = StringUtils.substring(filesFileName, index + 1);
    				/**定义上传位置**/
    				String path = dataDir+separator+"upload" +separator+"file"+separator;
    				System.out.println("---文件上传位置---"+path);
    				/**使用当前时间戳，避免文件重复被覆盖**/
    				String name = time+"";
    				String filename = path + name + "." + extFileName.toLowerCase();;
    				System.out.println("---文件名称---"+name);
    				File destFile = new File(filename);
    				try {
    					/**上传文件 用FileUtils**/
    					FileUtils.copyFile(files, destFile);
    				} catch (IOException e) {
    					e.printStackTrace();
    					
    					return "附件上传失败！";
    				}
    				
    			}
    	         return SUCCESS;
    		}
    		
    	 /****
    	  *  
    	  * 使用IO 流
    	  * @return
    	  * @throws IOException
    	  */
    	public String  swfUpload() throws IOException{
    		if(null == files){
    			/**若文件为空 则 报错**/
    			return "文件为空！";
    		}else{
    			// 判断数据是否正确
    			// 文件后缀名
    			int index = StringUtils.lastIndexOf(filesFileName, '.');
    			if (index == -1) {
    				return "文件类型错误！";
    			}
    			/**获取文件后缀名**/
    			String extFileName = StringUtils.substring(filesFileName, index + 1);
    			 /**分隔符**/
    			String separator = java.io.File.separator;
    			/**定义上传位置**/
    	        String root =ServletActionContext.getServletContext().getRealPath("");
    			String path = root+separator+"upload" +separator+"file"+separator;
    			System.out.println("---文件上传位置---"+path);
    			/**使用当前时间戳，避免文件重复被覆盖**/
    			long time = System.currentTimeMillis();
    			String name = time+"";
    			String filename = path + name + "." + extFileName.toLowerCase();
    	        File deskFile = new File(filename);
    			System.out.println("---文件名称---"+name);
    			InputStream is = new FileInputStream(files);
    	        OutputStream os = new FileOutputStream(deskFile);
    	        byte[] bytefer = new byte[1024];
    	        int length = 0;
    	        while ((length = is.read(bytefer)) != -1) {
    	            os.write(bytefer, 0, length);
    	        }
    	        os.close();
    	        is.close();
    	        return "success";
    		}
    	 
    	}
    }

struts.xml的配置：

<package name="uploadfile" extends="struts-default" namespace="/">
    		<action name="getinfo" class="com.UploadFile" method="getInfo">
    			<result name="success">/upload.jsp</result>
    		</action>
    		<action name="uploadfile" class="com.UploadFile" method="loadFile">
    			<result name="success">/upload.jsp</result>
    		</action>
    		<action name="swfuploadfile" class="com.UploadFile" method="swfUpload">
    			<result name="success">/upload.jsp</result>
    		</action>
    		
    		<action name="deletefile" class="com.deletFile" method="delFile">
    			<result name="success">/upload.jsp</result>
    		</action>
    	</package>

上传页面

index.jsp

这个效果是这样的选择一个文件自动上传一个文件：

![Image 1][]

![SouthEast 1][]

然后 可以一次性选择完进行上传：

swfUpload.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">
    	
      </head>
      <script type="text/javascript" src="swfupload/swfupload.js"></script>
      <script type="text/javascript" src="swfupload/handlers.js"></script>
      <script type="text/javascript" src="js/jquery-1.4.2.min.js"></script>
      <body style="font-size: 12px;">
       <script type="text/javascript">
    			var swfu;
    			var index = 1;
    			window.onload = function () {
    				swfu = new SWFUpload({
    					upload_url: "swfuploadfile.action",//要请求的action名字
    					
    					// File Upload Settings
    					file_size_limit : "50 MB",	// 1000MB
    					file_types : "*.*",//设置可上传的类型
    					file_types_description : "所有文件",
    					file_upload_limit : "10",
    					 //上传文件的名称
    	                file_post_name: "files",//相当于页面的name属性
    	                			
    					file_queue_error_handler : fileQueueError,//选择文件后出错
    					file_dialog_complete_handler : fileDialogComplete,//用于处理选择文件后出发的事件
    					file_queued_handler : fileQueued,
    					upload_progress_handler : uploadProgress,
    					upload_error_handler : uploadError,//上传文件失败触发的事件
    					upload_success_handler : uploadSuccess,//上传文件成功触发的事件
    					upload_complete_handler : uploadComplete,//用于处理文件上传结束之后的事件
    	
    					// Button Settings
    					button_image_url : "images/SmallSpyGlassWithTransperancy_17x18.png",//指向button图片额的地址
    					button_placeholder_id : "spanButtonPlaceholder",//button的iD
    					button_width: 100,//button的宽度
    					button_height: 18,//button的高度
    					button_text : '<span class="button">添加附件</span>',//button里面的文字
    					button_text_style : '.button { font-family: Helvetica, Arial, sans-serif; font-size: 12pt; } .buttonSmall { font-size: 10pt; }',
    					button_text_top_padding: 0,
    					button_text_left_padding: 18,
    					button_window_mode: SWFUpload.WINDOW_MODE.TRANSPARENT,
    					button_cursor: SWFUpload.CURSOR.HAND,
    					
    					// Flash Settings
    					flash_url : "swfupload/swfupload.swf",//flash的地址
    	
    					custom_settings : {
    						upload_target : "divFileProgressContainer"
    					},
    					// Debug Settings
    					debug: false  //是否显示调试窗口
    				});
    			};
    			function uploadComplete(file){//continue to  upload next file
    				swfu.startUpload();  
    			}
    			function fileDialogComplete(numFilesSelected ,numFilesQueued,numFilesinQueue){
    
    				var table = document.getElementById("filesTable");
    				table.style.display="block";
    			}
    			function fileQueued(file){
    				var table = document.getElementById("filesTable");
    				var row = table.insertRow();
    				var col1= row.insertCell();
    				var col2= row.insertCell();
    				var col3= row.insertCell();
    				var col4= row.insertCell();
    				row.id = file.id;
    				
    				col4.id=index;
    				col1.innerHTML = file.name; 
    				col2.innerHTML = file.size;
    				col3.innerHTML = showStatus(file.filestatus);
    				col4.innerHTML = "<input type='button' value = '删除'οnclick='deleteRow("+index+")'/>";
    				index++;
    				}
    			function showStatus(status){
    
    				var word ;
    				switch(status){
    				case  SWFUpload.FILE_STATUS.QUEUED:
    				  word="queued";
    				  break;
    				case  SWFUpload.FILE_STATUS.ERROR:
    				  word="ERROR";
    				  break;
    				case  SWFUpload.FILE_STATUS.COMPLETE:
    				  word="COMPLETE";
    				  break;
    				}
    				return word;
    				}
    
    			function uploadSuccess(file){
    				var row = document.getElementById(file.id);
    				row.cells[2].innerHTML=showStatus(file.filestatus);
    			}
    			function uploadError(file){
    				var row = document.getElementById(file.id);
    				row.cells[2].innerHTML=showStatus(file.filestatus);
    				}
    			function startUploadFile(){
    				swfu.startUpload();
    			}
    			function deleteRow(obj) { 
    				 var x=document.getElementById(obj);   
    				x.parentNode.parentNode.removeChild(x.parentNode);
    
    			} 
    		 
    		</script>
    		
    		<span id="spanButtonPlaceholder"></span>
    		<div >
    		<table id="filesTable" border="0" width="50%" style="display: none">
    			<tr>
    			<td>name</td>
    			<td>size</td>
    			<td>status</td>
    			<td>del</td>
    			</tr>
    		</table>
    		<div>
    		<button οnclick="startUploadFile()">上传</button>
      </body>
    </html>

效果是这样的：

![SouthEast 2][]

![Image 1][]

然后点击上传 一次性上传这些文件，其实 看上去是一次性上传的，其实是一个一个激动上传的，等于是系统自动调用了后台三次。

删除以后再说，

[java]: http://download.csdn.net/detail/linlinv3/5850441
[SouthEast]: /images/20211207/236bca2f38d54409a05f901a125561c6.png
[swfupload]: http://demo.swfupload.org/v220/index.htm
[Image 1]: 
[SouthEast 1]: /images/20211207/72577e78ceb049e5a8ba48df92d882b5.png
[SouthEast 2]: /images/20211207/918630376f4a4e5e97f87b813c0f7493.png