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这篇文章给大家分享的是有关Java实现文件上传的方法有哪些的内容。小编觉得挺实用的，因此分享给大家做个参考，一起跟随小编过来看看吧。
一. uploadify：
uploadify控件的scripts和styles在这里：图片上传
JSP：
<%@ page contentType="text/html;charset=UTF-8" language="java" %>
<%@ include file="../jsp/include/taglibs.jsp"%>
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
<html>
<head>
<title>Upload</title>
<script src="<c:url value="/scripts/jquery-1.8.3.min.js"/>" type="text/javascript"></script>
<script type="text/javascript" src="<c:url value="/scripts/jquery-admin/jquery-ui.js" />"></script>
<script type="text/javascript" src="<c:url value="/scripts/jquery-admin/component.js" />"></script>
<script type="text/javascript" src="<c:url value="/scripts/jquery-admin/jquery-validate.js" />"></script>
<script type="text/javascript" src="<c:url value="/scripts/jquery-admin/jquery-form.js" />"></script>
<script type="text/javascript"src="<c:url value="/scripts/jquery-admin/init.js" />"></script>
<script type="text/javascript"src="<c:url value="/scripts/jquery-admin/jquery.ui.datepicker-zh-CN.js" />"></script>
<link rel="stylesheet" href="<c:url value='/styles/admin/admin1.css'/>" rel="external nofollow" >
<link href="<c:url value=" rel="external nofollow" rel="external nofollow" /styles/jquery-ui/jquery-ui.css" />" rel="stylesheet" type="text/css" />
<script src="<c:url value="/scripts/jquery-uploadify/jquery.uploadify.min.js"/>" type="text/javascript"></script>
<link rel="stylesheet" type="text/css" href="<c:url value=" rel="external nofollow" rel="external nofollow" /scripts/jquery-uploadify/uploadify.css"/>">
<style type="text/css">
#jidAttachTable {width:400px;font-size:14px;border:1px solid #d3d3d3;border-left-width:0;border-top-width:0;}
#jidAttachTable td{border: 1px solid #d3d3d3;text-align:left;padding:5px;border-right-width:0;border-bottom-width:0;}
#jidAttachTable .i-i-title{width:450px;}
#jidAttachTable .i-i-content{width:100px;}
</style>
<script type="text/javascript">
$(function(){
//视频上传
var uploadVideo = $('#file_upload_video').uploadify({
'buttonText':'上传视频',
'multi': false,
'fileTypeDesc': '请选择wmv视频文件',
'fileTypeExt': '*.wmv',
'swf' : '<c:url value="/scripts/jquery-uploadify/uploadify.swf"/>"',
'uploader' : '<c:url value="/uploadAttach.do"/>' ,
'onUploadError': uploadVideoUploadError,
'onUploadSuccess':uploadVideoUploadSuccess
});
function uploadVideoUploadError(){
alert("上传视频发生错误");
}
function uploadVideoUploadSuccess(file, data, response){
var strs_ = data.split("@");
var videoName_ = strs_[0];
var videoPath_ = strs_[1];
$("#vidioPreview").val("/upload/" + videoPath_);
}
var arrAttach = new Array();
//将现有的附件加载到临时数组中
var nowAttachIds_ = "${attachs}";
//初始化现有的附件
if(nowAttachIds_ != null && nowAttachIds_ != ""){
var ids_ = nowAttachIds_.split("@") ;
var i = 0;
for( ; i < ids_.length ; i++){
arrAttach.push(ids_[i]);
}
}
//附件上传
var uploadAttach = $('#file_upload_attach').uploadify({
'buttonText':'上传附件',
'multi': false,
'swf' : '<c:url value="/scripts/jquery-uploadify/uploadify.swf"/>"',
'uploader' : '<c:url value="/uploadAttach.do"/>',
'onUploadError': uploadAttachUploadError,
'onUploadSuccess':uploadAttachUploadSuccess
});
function uploadAttachUploadError(){
alert("上传过程中发生错误,您可以尝试重复上传一次！")
}
function uploadAttachUploadSuccess(file, data, response){
var strs_ = data.split("@") ;
var documnetId_ = strs_[0];
var fileName_ = strs_[1];
var attach_ = "<tr class=\"jsClassDeleteAttachButtonTR\"> " +
" <td class='i-i-title'>" + fileName_ + "</td> " +
" <td class='i-i-content'><button class=\"jsClassDeleteAttachButton\" dataAttach="+ documnetId_ +">删除</button></td>" +
" </tr>";
arrAttach.push(documnetId_);
$("#jidAttachTable").append(attach_);
}
$(".jsClassDeleteAttachButton").live("click",function(){
var data_ = $(this).attr("dataAttach");
var i_ = 0;
for(;i_ < arrAttach.length; i_++){
if(data_ == arrAttach[i_]){
arrAttach.splice(i_,1);
break;
}
}
$(this).parent().parent().remove();
//alert(arrAttach)
});
});
var videotag = "";
$(function() {
$("#PreviewDiv").dialog({
title: "视频预览",
autoOpen: false,
modal: true,
resizable: false,
position : "center",
width: "489px",
buttons: {
"关闭": function() {
$("#PreviewDiv").dialog("close");
}
}
});
$( "#PreviewDiv" ).on( "dialogopen", function( event, ui ) {
$("#PreviewDiv").html(videotag);
} );
$( "#PreviewDiv" ).on( "dialogclose", function( event, ui ) {
$("#PreviewDiv").html("");
} );
});
var video_root_path = "http://localhost:8080/ProjectTest/";
function openDownloadFrame() {
var _storePreview= video_root_path + $("#vidioPreview").val();
var _embed_head = '<EMBED src=\"';
var _embed_tail = '\" width=\"450\" height=\"400\" type=\"audio/x-wav\" loop=\"false\" autostart=\"true\">' + '</EMBED>';
videotag = _embed_head + _storePreview + _embed_tail;
$("#PreviewDiv").dialog("open");
}
</script>
</head>
<body>
<form:form id="form" name="basedata" modelAttribute="basedata" action="update.do" method="post" >
<div >
<div >
<input id="file_upload_video" name="file_upload_video" type="file" multiple="true">
</div>
<div >
<input id="vidioPreview" type="text" name="${bad.attributeStore}" value="${basedata[storeName]}"/>
<input onclick="openDownloadFrame();" type="button" name="button" value="预览">
</div>
</div>
<div id='divContext' >
<div >
<input id="file_upload_attach" name="file_upload_attach" type="file" multiple="true">
</div>
<div class="i-attachContainer">
<table id="jidAttachTable">
<c:forEach items="${attachList}" var="attach">
<tr class="jsClassDeleteAttachButtonTR">
<td class='i-i-title'>${attach.name}</td>
<td class='i-i-content'>
<button class="jsClassDeleteAttachButton" dataAttach="${attach.id}">删除</button>
</td>
</tr>
</c:forEach>
</table>
</div>
</div>
<div id="PreviewDiv">
</div>
</form:form>
</body>
</html>后台Java：
package com.sun.fileUpload;
import java.io.BufferedOutputStream;
import java.io.File;
import java.io.FileOutputStream;
import java.io.IOException;
import java.util.Date;
import java.util.Iterator;
import java.util.LinkedList;
import java.util.List;
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;
import org.springframework.stereotype.Controller;
import org.springframework.ui.ModelMap;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestParam;
import org.springframework.web.multipart.MultipartFile;
@Controller
public class upload{
// 附件上传
@RequestMapping("/uploadAttach.do")
public void attachUpload(ModelMap modelMap,HttpServletRequest request ,HttpServletResponse response) throws IOException {
System.out.println("upload file .... start");
String savePath = request.getSession().getServletContext().getRealPath("/") + "upload";
System.out.println("store path is :" + savePath);
File f1 = new File(savePath);
if (!f1.exists()) {
f1.mkdirs();
}
DiskFileItemFactory fac = new DiskFileItemFactory();
ServletFileUpload upload = new ServletFileUpload(fac);
upload.setHeaderEncoding("utf-8");
List<FileItem> fileList = null;
try {
fileList = upload.parseRequest(request);
} catch (FileUploadException ex) {
ex.printStackTrace();
return;
}
Iterator<FileItem> it = fileList.iterator();
String name = "";
System.out.println("deal the files ... start");
//存储完毕保存进入数据库
//Document document = null;
while (it.hasNext()) {
FileItem item = it.next();
if (!item.isFormField()) {
name = item.getName();
long size = item.getSize();
String type = item.getContentType();
if (name == null || name.trim().equals("")) {
continue;
}
System.out.println("dealing file info:" + "fileName" + name + " size" + size + " type:" + type);
//扩展名格式：
if (name.lastIndexOf(".") >= 0) {
name.substring(name.lastIndexOf("."));
}
//存文件到磁盘指定路径 且存储文件记录存入数据库，如果存储发生故障，数据库记录也会创建失败
/* document = new Document();
document.setFileType(extName);
document.setFullName(name);
document.setDescription(name);
document.setName(name);
document.setUploadDate(new Date());
document = documentManager.saveWithFileStore(document,item,savePath,extName);*/
System.out.println(new Date() + "persist id :" + name);
File saveFile = new File(savePath + "/" + name);
try {
item.write(saveFile);
} catch (Exception e) {
e.printStackTrace();
throw new RuntimeException(new Date() + "store file error");
}
}
}
System.out.println("deal the files end");
System.out.println("upload file .... end");
response.getWriter().print(name + "@" + name);
}
}这里把数据库更新给省略了，有需要可以自己添加。
除上传外，其他实现功能：
1. 视频上传后的预览功能
2. 视频是单文件上传，附件是多文件上传和删除
二. Spring默认的上传功能：
JSP：
<%@ page contentType="text/html;charset=UTF-8" language="java" %>
<%@ include file="../jsp/include/taglibs.jsp"%>
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
<html>
<head>
<title>Upload</title>
<script src="<c:url value="/scripts/jquery-1.8.3.min.js"/>" type="text/javascript"></script>
<script type="text/javascript" src="<c:url value="/scripts/jquery-admin/jquery-ui.js" />"></script>
<link rel="stylesheet" href="<c:url value='/styles/admin/ace.css'/>" rel="external nofollow" >
<style type="text/css">
.file {
position: relative;
display: inline-block;
background: #428BCA;
border: 1px solid #99D3F5;
border-radius: 4px;
padding: 4px 12px;
overflow: hidden;
color: #000000;
text-decoration: none;
text-indent: 0;
line-height: 20px;
}
.file:link {
color: white;
text-decoration:none;
}
.file input {
position: absolute;
font-size: 100px;
right: 0;
top: 0;
opacity: 0;
}
.file:hover {
background: #1B6AAA;
border-color: #78C3F3;
color: white;
text-decoration: none;
}
</style>
</head>
<body>
<form:form id="fileUploadForm" method="post" action="uploadFile.do" name="uploadfile" modelAttribute="uploadfile" enctype="multipart/form-data">
点击保存后上传:
<a href="javascript:;" rel="external nofollow" class="file">选择文件
<input type="file" name="videoFile" id="videoFile">
</a>
<input type="text" id="resourceUrl-field" name="resourceUrl" placeholder="资源地址" class="col-sm-12" value="${uploadfile}"/>
<input type="submit" value="保存" class="btn btn-sm btn-primary">
</form:form>
</body>
</html>后台Java：
package com.sun.fileUpload;
import java.io.BufferedOutputStream;
import java.io.File;
import java.io.FileOutputStream;
import java.io.IOException;
import java.util.Date;
import java.util.Iterator;
import java.util.LinkedList;
import java.util.List;
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;
import org.springframework.stereotype.Controller;
import org.springframework.ui.ModelMap;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestParam;
import org.springframework.web.multipart.MultipartFile;
@Controller
public class upload{
@RequestMapping(value = "/uploadFile.do")
public String uploadController(HttpServletRequest request,ModelMap modelMap,
@RequestParam("videoFile") MultipartFile videoFile) throws IllegalStateException, IOException{
String savePath = request.getSession().getServletContext().getRealPath("/") + "upload";
try {
uploadSingleFile(savePath, videoFile, request.getSession().getServletContext().getRealPath("/"));
}catch (Exception e) {
return "/upload";
}
modelMap.addAttribute("uploadfile", "upload/" + videoFile.getOriginalFilename());
return "/upload";
}
/**
*
* @param path 这个path 是upload的子目录路径 比如 path=/image 最终将下载到[root/upload/image/]目录下
* @param file
* @return
* @throws java.io.IOException
*/
public static String uploadSingleFile(String path, MultipartFile file, String rootPath) {
if (!file.isEmpty()) {
byte[] bytes;
try {
bytes = file.getBytes();
// Create the file on server
File serverFile = new File(path + "/" + file.getOriginalFilename());
BufferedOutputStream stream = new BufferedOutputStream(new FileOutputStream(serverFile));
stream.write(bytes);
stream.close();
System.out.println("Server File Location=" + serverFile.getAbsolutePath());
return getRelativePathFromUploadDir(serverFile, rootPath).replaceAll("\\\\", "/");
} catch (IOException e) {
e.printStackTrace();
}
}else{
System.out.println("文件内容为空");
}
return null;
}
/**
*
* @param file
* @return 返回从upload目录下面的相对路径
*/
public static String getRelativePathFromUploadDir(File file, String rootPath){
if(null==file)
return "";
String absolutePath = file.getAbsolutePath();
if(absolutePath.indexOf(rootPath)!=-1 && rootPath.length()<absolutePath.length())
return absolutePath.substring(absolutePath.indexOf(rootPath)+rootPath.length());
else
return "";
}
}Spring配置文件springmvc-servlet.xml中添加：
<bean id=”multipartResolver” class=”org.springframework.web.multipart.commons.CommonsMultipartResolver”> <property name=”defaultEncoding” value=”UTF-8″ /> </bean>
如果和uploadify同时使用的话，需要做一些修改，否则uploadify的上传文件会被Spring拦截：
<!-- 支持上传文件 --> lt;bean id="multipartResolver" class="org.sun.com.MyMultipartResolver"> <!--设置上传文件的编码格式，用于解决上传的文件中文名乱码问题 --> <property name="defaultEncoding"> <value>UTF-8</value> </property> <property name="excludeUrls" value="/uploadAttach.do,/uploadVideo.do"/> lt;/bean>
org.sun.com.MyMultipartResolver：
package org.sun.com;
import javax.servlet.http.HttpServletRequest;
import org.springframework.web.multipart.commons.CommonsMultipartResolver;
/**
* @author Sun
*/
public class MyMultipartResolver extends CommonsMultipartResolver {
private String excludeUrls;
private String[] excludeUrlArray;
public String getExcludeUrls() {
return excludeUrls;
}
public void setExcludeUrls(String excludeUrls) {
this.excludeUrls = excludeUrls;
this.excludeUrlArray = excludeUrls.split(",");
}
/**
* 这里是处理Multipart http的方法。如果这个返回值为true,那么Multipart http body就会MyMultipartResolver 消耗掉.如果这里返回false
* 那么就会交给后面的自己写的处理函数处理例如刚才ServletFileUpload 所在的函数
* @see org.springframework.web.multipart.commons.CommonsMultipartResolver#isMultipart(javax.servlet.http.HttpServletRequest)
*/
@Override
public boolean isMultipart(HttpServletRequest request) {
for (String url: excludeUrlArray) {
// 这里可以自己换判断
if (request.getRequestURI().contains(url)) {
return false;
}
}
return super.isMultipart(request);
}
}感谢各位的阅读！关于“Java实现文件上传的方法有哪些”这篇文章就分享到这里了，希望以上内容可以对大家有一定的帮助，让大家可以学到更多知识，如果觉得文章不错，可以把它分享出去让更多的人看到吧！
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