mvc附件上传
‘壹’ 求SpringMVC大文件上传详解及实例代码
SpringMVC的文件上传非常简便，首先导入文件上传依赖的jar：
<!-- 文件上传所依赖的jar包 -->
<dependency>
<groupId>commons-fileupload</groupId>
<artifactId>commons-fileupload</artifactId>
<version>1.3.1</version>
</dependency>
在springMVC-servlet.xml配置文件中配置文件解析器：
<!--1*1024*1024即1M resolveLazily属性启用是为了推迟文件解析，以便捕获文件大小异常 -->
<!--文件上传解析器-->
<bean id="multipartResolver"
class="org.springframework.web.multipart.commons.CommonsMultipartResolver">
<property name="maxUploadSize" value="1048576"/>
<property name="defaultEncoding" value="UTF-8"/>
<property name="resolveLazily" value="true"/>
</bean>
注意解析器的id必须等于multipartResolver,否则上传会出现异常
import org.apache.commons.io.FileUtils;
import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestParam;
import org.springframework.web.multipart.MultipartFile;
import org.springframework.web.multipart.commons.CommonsMultipartFile;
import java.io.File;
@Controller
public class FileController {
/**
* 上传单个文件操作
* MultipartFile file就是上传的文件
* @return
*/
@RequestMapping(value = "/upload1.html")
public String fileUpload1(@RequestParam("file") MultipartFile file) {
try {
//将上传的文件存在E:/upload/下
FileUtils.InputStreamToFile(file.getInputStream(), new File("E:/upload/",
file.getOriginalFilename()));
} catch (Exception e) {
e.printStackTrace();
}
//上传成功返回原来页面
return "/file.jsp";
}}
上传文件时，Controller的方法中参数类型是MultipartFile即可将文件映射到参数上。
页面：
file.jsp:
<form method="post" action="/upload1.html" enctype="multipart/form-data">
<input type="file" name="file"/>
<button type="submit" >提交</button>
</form>
‘贰’ springmvc怎么上传文件
spring mvc(注解)上传文件的简单例子,这有几个需要注意的地方
1.form的enctype=”multipart/form-data” 这个是上传文件必须的
2.applicationContext.xml中 <bean id=”multipartResolver” class=”org.springframework.web.multipart.commons.CommonsMultipartResolver”/> 关于文件上传的配置不能少
大家可以看具体代码如下:
web.xml
[html] view plain
<?xml version="1.0" encoding="UTF-8"?>
<web-app xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns="http://java.sun.com/xml/ns/javaee" xmlns:web="http://java.sun.com/xml/ns/javaee/web-app_2_5.xsd" xsi:schemaLocation="http://java.sun.com/xml/ns/javaee http://java.sun.com/xml/ns/javaee/web-app_2_5.xsd" id="WebApp_ID" version="2.5">
<display-name>webtest</display-name>
<listener>
<listener-class>org.springframework.web.context.ContextLoaderListener</listener-class>
</listener>
<context-param>
<param-name>contextConfigLocation</param-name>
<param-value>
/WEB-INF/config/applicationContext.xml
/WEB-INF/config/codeifAction.xml
</param-value>
</context-param>
<servlet>
<servlet-name>dispatcherServlet</servlet-name>
<servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>
<init-param>
<param-name>contextConfigLocation</param-name>
<param-value>/WEB-INF/config/codeifAction.xml</param-value>
</init-param>
<load-on-startup>1</load-on-startup>
</servlet>
<!-- 拦截所有以do结尾的请求 -->
<servlet-mapping>
<servlet-name>dispatcherServlet</servlet-name>
<url-pattern>*.do</url-pattern>
</servlet-mapping>
<welcome-file-list>
<welcome-file>index.do</welcome-file>
</welcome-file-list>
</web-app>
applicationContext.xml
[html] view plain
<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:p="http://www.springframework.org/schema/p"
xmlns:context="http://www.springframework.org/schema/context"
xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-3.0.xsd
http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context-3.0.xsd"
default-lazy-init="true">
<!-- 启动Spring MVC的注解功能，完成请求和注解POJO的映射 -->
<bean class="org.springframework.web.servlet.mvc.annotation." lazy-init="false" />
<!-- 另外最好还要加入，不然会被 XML或其它的映射覆盖！ -->
<bean class="org.springframework.web.servlet.mvc.annotation." />
<!-- 对模型视图名称的解析，即在模型视图名称添加前后缀 -->
<bean class="org.springframework.web.servlet.view.InternalResourceViewResolver" p:prefix="/WEB-INF/jsp/" p:suffix=".jsp" />
<!-- 支持上传文件 -->
<bean id="multipartResolver" class="org.springframework.web.multipart.commons.CommonsMultipartResolver"/>
</beans>
codeifAction.xml
[html] view plain
<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:context="http://www.springframework.org/schema/context"
xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-3.0.xsd
http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context-3.0.xsd"
default-lazy-init="true">
<bean id="uploadAction" class="com.codeif.action.UploadAction" />
</beans>
UploadAction.java
[java] view plain
package com.codeif.action;
import java.io.File;
import java.util.Date;
import javax.servlet.http.HttpServletRequest;
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 UploadAction {
@RequestMapping(value = "/upload.do")
public String upload(@RequestParam(value = "file", required = false) MultipartFile file, HttpServletRequest request, ModelMap model) {
System.out.println("开始");
String path = request.getSession().getServletContext().getRealPath("upload");
String fileName = file.getOriginalFilename();
// String fileName = new Date().getTime()+".jpg";
System.out.println(path);
File targetFile = new File(path, fileName);
if(!targetFile.exists()){
targetFile.mkdirs();
}
//保存
try {
file.transferTo(targetFile);
} catch (Exception e) {
e.printStackTrace();
}
model.addAttribute("fileUrl", request.getContextPath()+"/upload/"+fileName);
return "result";
}
}
index.jsp
[html] view plain
<%@ page pageEncoding="utf-8"%>
<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8">
<title>上传图片</title>
</head>
<body>
<form action="upload.do" method="post" enctype="multipart/form-data">
<input type="file" name="file" /> <input type="submit" value="Submit" /></form>
</body>
</html>
WEB-INF/jsp/下的result.jsp
[html] view plain
<%@ page pageEncoding="utf-8"%>
<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8">
<title>上传结果</title>
</head>
<body>
<img alt="" src="${fileUrl }" />
</body>
</html>
‘叁’ spring mvc word文件上传功能
springmvc文件上传
1.加入jar包：
commons-fileupload-1.2.2.jar
commons-io-2.0.1.jar
lperson.java中加属性，实现get ,set方法
private String photoPath;
2.创建WebRoot/upload目录，存放上传的文件
1 <sf:form id="p" action="saveOrUpdate"
2 method="post"
3 modelAttribute="person"
4 enctype="multipart/form-data">
5
6 <sf:hidden path="id"/>
7 name: <sf:input path="name"/><br>
8 age: <sf:input path="age"/><br>
9 photo: <input type="file" name="photo"/><br>
上面第9行文件上传框，不能和实体对象属性同名，类型不同
controller配置
1 12、文件上传功能实现 配置文件上传解析器
2 @RequestMapping(value={"/saveOrUpdate"},method=RequestMethod.POST)
3 public String saveOrUpdate(Person p,
4 @RequestParam("photo") MultipartFile file,
5 HttpServletRequest request
6 ) throws IOException{
7 if(!file.isEmpty()){
8 ServletContext sc = request.getSession().getServletContext();
9 String dir = sc.getRealPath(“/upload”); //设定文件保存的目录
10
11 String filename = file.getOriginalFilename(); //得到上传时的文件名
12 FileUtils.writeByteArrayToFile(new File(dir,filename), file.getBytes());
13
14 p.setPhotoPath(“/upload/”+filename); //设置图片所在路径
15
16 System.out.println("upload over. "+ filename);
17 }
18 ps.saveOrUpdate(p);
19 return "redirect:/person/list.action"; //重定向
20 }
3.文件上传功能实现 spring-mvc.xml 配置文件上传解析器
1 <!-- 文件上传解析器 id 必须为multipartResolver -->
2 <bean id="multipartResolver"
3 class="org.springframework.web.multipart.commons.CommonsMultipartResolver">
4 <property name="maxUploadSize" value=“10485760"/>
5 </bean>
6
7 maxUploadSize以字节为单位：10485760 =10M id名称必须这样写
1 映射资源目录
2 <mvc:resources location="/upload/" mapping="/upload/**"/>
随即文件名常用的三种方式：
文件上传功能（增强：防止文件重名覆盖）
fileName = UUID.randomUUID().toString() + extName;
fileName = System.nanoTime() + extName;
fileName = System.currentTimeMillis() + extName;
1 if(!file.isEmpty()){
2 ServletContext sc = request.getSession().getServletContext();
3 String dir = sc.getRealPath("/upload");
4 String filename = file.getOriginalFilename();
5
6
7 long _lTime = System.nanoTime();
8 String _ext = filename.substring(filename.lastIndexOf("."));
9 filename = _lTime + _ext;
10
11 FileUtils.writeByteArrayToFile(new File(dir,filename), file.getBytes());
12
13 p.setPhotoPath("/upload/"+filename);
14
15 System.out.println("upload over. "+ filename);
16 }
图片显示 personList.jsp
1 <td><img src="${pageContext.request.contextPath}${p.photoPath}">${p.photoPath}</td>
‘肆’ ASP.NET mvc上传多个附件
asp.net默认上限40960K 90秒请求就超时。你是不是传多了
‘伍’ 如何使用springmvc实现文件上传
在现在web应用的开发，springMvc使用频率是比较广泛的，现在给大家总结一下springMvc的上传附件的应用，希望对大家有帮助,废话不多说，看效果
准备jar包
4.准备上传代码
@Controller//spring使用注解管理bean
@RequestMapping("/upload")//向外暴露资源路径,访问到该类
public class UploadController {
/**
* 上传功能
* @return
* @throws IOException
*/
@RequestMapping("/uploadFile")//向外暴露资源路径，访问到该方法
public String uploadFile(MultipartFile imgFile,HttpServletRequest req) throws IOException{
if(imgFile != null ){
//获取文件输入流
InputStream inputStream = imgFile.getInputStream();
//随机产生文件名，原因是：避免上传的附件覆盖之前的附件
String randName = UUID.randomUUID().toString();//随机文件名
//获取文件原名
String originalFilename = imgFile.getOriginalFilename();
//获取文件后缀名(如：jpgpng...)
String extension = FilenameUtils.getExtension(originalFilename);
//新名字
String newName = randName+"."+extension;
//获取servletContext
ServletContext servletContext = req.getSession().getServletContext();
//获取根路径
String rootPath = servletContext.getRealPath("/");
File file = new File(rootPath,"upload");
//判断文件是否存在，若不存在，则创建它
if(!file.exists()){
file.mkdirs();
}
//获取最终输出的位置
FileOutputStream fileOutputStream = new FileOutputStream(new File(file,newName));
//上传附件
IOUtils.(inputStream, fileOutputStream);
}
return null;
}
}
‘陆’ mvc视图中怎么上传图片并显示
如果只是上传的话那太容易了，如果还要显示那就难了，因为要显示的话就不能只向服务器提交一次请求，必须异步提交。下面的例子是我亲自写的，异步提交上传图片并预览。全部代码都在。
返回到前台页面的JSON格式对象是以类的对象。
publicclassReturnImage
{
publicstringbig{get;set;}
publicstringsmall{get;set;}
publicstringisSuccessfull{get;set;}
publicstringmessage{get;set;}
}
对于上传和生成缩略图，请自行完成，以下是ASP.NETMVC的例子。
publicclassHomeController:Controller
{
//
//GET:/Home/
publicActionResultIndex()
{
returnView();
}
///<summary>
///上传图片
///</summary>
///<returns></returns>
publicActionResultUploadImage()
{
//定义错误消息
JsonResultmsg=newJsonResult();
try
{
//接受上传文件
HttpPostedFileBasepostFile=Request.Files["upImage"];
if(postFile!=null)
{
DateTimetime=DateTime.Now;
//获取上传目录转换为物理路径
stringuploadPath=Server.MapPath("~/UploadFiles/"+time.Year+"/"+time.ToString("yyyyMMdd")+"/");
//文件名
stringfileName=time.ToString("yyyyMMddHHmmssfff");
//后缀名称
stringfiletrype=System.IO.Path.GetExtension(postFile.FileName);
//获取文件大小
longcontentLength=postFile.ContentLength;
//文件不能大于2M
if(contentLength<=1024*2048)
{
//如果不存在path目录
if(!Directory.Exists(uploadPath))
{
//那么就创建它
Directory.CreateDirectory(uploadPath);
}
//保存文件的物理路径
stringsaveFile=uploadPath+fileName+"_big"+filetrype;
try
{
//保存文件
postFile.SaveAs(saveFile);
//保存缩略图的物理路径
stringsmall=uploadPath+fileName+"_small"+filetrype;
MakeThumbnail(saveFile,small,320,240,"W");
ReturnImageimage=newReturnImage();
image.big="/UploadFiles/"+time.Year+"/"+time.ToString("yyyyMMdd")+"/"+fileName+"_big"+filetrype;
image.small="/UploadFiles/"+time.Year+"/"+time.ToString("yyyyMMdd")+"/"+fileName+"_small"+filetrype;
msg=Json(image);
}
catch
{
msg=Json("上传失败");
}
}
else
{
msg=Json("文件大小超过限制要求");
}
}
else
{
msg=Json("请选择文件");
}
}
catch(Exceptione)
{
;
}
msg.ContentType="text/html";
returnmsg;
}
///<summary>
由于回答超过最大限制，///生成缩略图的代码请向我索取
‘柒’ springmvc 怎么将文件上传到linux服务器
Spring MVC为文件上传提供了直接的支持，这种支持是通过即插即用的MultipartResolver实现的。Spring使用Jakarta Commons FileUpload 技术实现了一个MultipartResolver实现类：CommonsMultipartResolver。
Spring MVC上下文中默认没有装配MultipartResolver，因此默认情况下不能处理文件的上传工作。如果想要使用Spring的文件上传功能，需要先在上下文中配置MultipartResolver。
第一步：配置MultipartResolver
使用CommonsMultipartResolver配置一个MultipartResolver解析器：
<bean id="multipartResolver" class="org.springframework.web.multipart.commons.CommonsMultipartResolver"
p:defaultEncoding="UTF-8"
p:maxUploadSize="5242880"
p:uploadTempDir="upload/temp"
/>
defaultEncoding必须和用户JSP的pageEncoding属性一致，以便正确读取表单的内容。uploadTempDir是文件上传过程所使用的临时目录，文件上传完成后，临时目录中的临时文件会被自动清除。
第二步：编写文件上传表单页面和控制器
JSP页面如下:
<%@ 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>
<body>
<h1>选择上传文件</h1>
<form action="<%=basePath%>user/upload.do" method="post" enctype="multipart/form-data">
文件名：<input type="text" name="name" /><br/>
<input type="file" name="file" /><br/>
<input type="submit" />
</form>
</body>
</html>
注意：负责上传的表单和一般表单有一些区别，表单的编码类型必须是"Multipart/form-data"
控制器UserController如下：
package com.web;
import java.io.File;
import java.io.IOException;
import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestParam;
import org.springframework.web.multipart.MultipartFile;
@Controller
@RequestMapping(value = "/user")
public class UserController {
@RequestMapping(value = "/upload.do")
public String updateThumb(@RequestParam("name") String name,
@RequestParam("file") MultipartFile file)
throws IllegalStateException, IOException {
if (!file.isEmpty()) {
file.transferTo(new File("d:/temp/"
+ name
+ file.getOriginalFilename().substring(
file.getOriginalFilename().lastIndexOf("."))));
return "redirect:success.html";
} else {
return "redirect:fail.html";
}
}
}
Spring MVC会将上传文件绑定到MultipartFile对象中。MultipartFile提供了获取上传文件内容、文件名等内容，通过transferTo方法还可将文件存储到硬件中，具体说明如下：
byte[] getBytes() :获取文件数据
String getContentType():获取文件MIME类型，如image/pjpeg、text/plain等
InputStream getInputStream():获取文件流
String getName():获取表单中文件组件的名字
String getOriginalFilename():获取上传文件的原名
long getSize():获取文件的字节大小，单位为byte
boolean isEmpty():是否有上传的文件
void transferTo(File dest):可以使用该文件将上传文件保存到一个目标文件中
源码：uploadtest.zip
‘捌’ ASP.NET MVC 上传多个附件Controller 获取不到值
在方法上加个断点 用fiddler ff 或者是chrome 去监视你的上传执行的get 或者post请求看有没有东西如果有而且后台中断变量监视里也有值~检查你后台代码。如果反之检查前面的js。话说你Request.Files["UploadFile"]只有一个参数一个文件流也太简单了。前台请求的时候多传几个参数来个时间戳 随机数什么的。只是Request.Files["UploadFile"]为空也不一定好区分你前台的代码有没有问题
‘玖’ .net MVC中 在视图中上传的附件图片怎么保存到数据库
图片保存到数据库不是最佳的选择.
你可以搜索一下Uploadify 插件. 这个插件非常好用
一般将图片存为图片文件.
大致代码如下:
$("#btn_upload_attachment").uploadify({
height: 25,
swf: '../Scripts/plugin/uplodify/uploadify.swf',
uploader: '/Home/Upload',
queueSizeLimit: 1,
formData: { ID: newId },
buttonText: '选择文件',
width: 80,
onUploadSuccess: function (file, data, response) {
eval("data=" + data);
AddToAttachmentList(data.Data);
}
});
后台代码处理:
[AcceptVerbs(HttpVerbs.Post)]
public JsonResult Upload(HttpPostedFileBase fileData, Guid? ID)
{
if (fileData != null)
{
try
{
// 文件上传后的保存路径
var filePath = Path.Combine(ConfigurationManager.AppSettings["BusinessFiles"], Ticket.OrgId.ToString());
if (!Directory.Exists(filePath))
{
Directory.CreateDirectory(filePath);
}
var fileName = Path.GetFileName(fileData.FileName);// 原始文件名称
var fileExtension = Path.GetExtension(fileName); // 文件扩展名
var fileID = Guid.NewGuid();
var saveName = fileID.ToString() + fileExtension; // 保存文件名称
fileData.SaveAs(filePath + "/" + saveName);
// 作为临时附件存入附件表
var attachments = new Attachments();
attachments.ID = fileID;
attachments.OrgID = Ticket.OrgId;
attachments.BusinessType = (byte)BusinessType.TransferContract;
attachments.Status = (byte)AttachmentStatus.Temp;
if (ID.HasValue)
{
attachments.BusinessID = ID.Value;
}
attachments.Extension = fileExtension;
attachments.Name = fileName;
attachments.Size = fileData.ContentLength;
attachments.UploadTime = GetNow();
attachments.UploadBy = Ticket.EmployeeName;
attachments.UploadByID = Ticket.UserId;
AttachmentsBLL.SaveAttachment(attachments);
return Json(new { Success = true, FileName = fileName, SaveName = saveName, FileID = fileID, Data = attachments });
}
catch (Exception ex)
{
return Json(new { Success = false, Message = ex.Message }, JsonRequestBehavior.AllowGet);
}
}
else
{
return Json(new { Success = false, Message = "请选择要上传的文件！" }, JsonRequestBehavior.AllowGet);
}
}