spring上传文件_springmvc怎么上传文件

A. spring mvc 怎么实现上传文件

在springmvc配置文件中这样配置:

<bean id="multipartResolver" class="org.springframework.web.multipart.commons.CommonsMultipartResolver">

<property name="defaultEncoding" value="utf-8"/>

<property name="maxUploadSize" value="-1"/>

<property name="resolveLazily" value="true"/>
</bean>
页面：
<form action="upload.action" method="post" enctype="multipart/form-data">
<input type="file" name="fileUpload" />
<input type="submit" value="上传" />
</form>

后台：
@Controller
public class UploadAction implements ServletContextAware {
private ServletContext context;
@RequestMapping("/upload")
public String upload(HttpServletRequest request) throws Exception{
//转换请求为文件上传请求
MultipartHttpServletRequest mrequest=(MultipartHttpServletRequest)request;
MultipartFile mfile=mrequest.getFile("file");
if(!mfile.isEmpty()){//判断文件是否为空
path=context.getRealPath("/upload")+File.separator+mfile.getOriginalFilename();
File file=new File(path);
mfile.transferTo(file);//保存文件
}
return "跳转页面";
}}

B. spring mvc上传文件到指定的文件夹中，新手不会，

第一个参数是你的前台传递进来的文件。

第二个参数是request对象。
第三个参数是spring mvc 绑定数据用的对象。
根据你的代码你的第三个参数可以不要。

第一个参数是前台form当中有个类似于<input type="file" name="file"/>的控件传递过来的文件。

C. spring mvc 实现多个文件上传 List<MultipartFile> files = request.getFiles("file"); 报错

CommonsMultipartResolver multipartResolver = new CommonsMultipartResolver(request.getSession().getServletContext());
//判断request是否有文件需要上传
if (multipartResolver.isMultipart(request)) {
//转换成多部分request
MultipartHttpServletRequest multiRequest = (MultipartHttpServletRequest) request;
//读取文件
List<MultipartFile> file = multiRequest.getFiles("file");

D. springmvc怎么实现文件上传

springmvc怎么实现文件上传

package com.test.controller;

import java.io.File;
import java.util.Map;

import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import javax.servlet.http.HttpSession;

import org.apache.commons.io.FilenameUtils;
import org.apache.commons.lang3.ArrayUtils;
import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestMethod;
import org.springframework.web.bind.annotation.RequestParam;
import org.springframework.web.bind.annotation.ResponseBody;
import org.springframework.web.multipart.commons.CommonsMultipartFile;

import com.test.servlet.NoSupportExtensionException;
import com.test.servlet.State;

@Controller
@RequestMapping(value = "/mvc")
public class UploadController {

/** 日志对象*/
private Log logger = LogFactory.getLog(this.getClass());

private static final long serialVersionUID = 1L;

/** 上传目录名*/
private static final String uploadFolderName = "uploadFiles";

/** 允许上传的扩展名*/
private static final String [] extensionPermit = {"txt", "xls", "zip"};

@RequestMapping(value = "/upload.do", method = RequestMethod.POST)
public @ResponseBody Map<String, Object> fileUpload(@RequestParam("file") CommonsMultipartFile file,
HttpSession session, HttpServletRequest request, HttpServletResponse response) throws Exception{
logger.info("UploadController#fileUpload() start");

//清除上次上传进度信息
String curProjectPath = session.getServletContext().getRealPath("/");
String saveDirectoryPath = curProjectPath + "/" + uploadFolderName;
File saveDirectory = new File(saveDirectoryPath);
logger.debug("Project real path [" + saveDirectory.getAbsolutePath() + "]");

// 判断文件是否存在
if (!file.isEmpty()) {
String fileName = file.getOriginalFilename();
String fileExtension = FilenameUtils.getExtension(fileName);
if(!ArrayUtils.contains(extensionPermit, fileExtension)) {
throw new NoSupportExtensionException("No Support extension.");
}
file.transferTo(new File(saveDirectory, fileName));
}

logger.info("UploadController#fileUpload() end");
return State.OK.toMap();
}

}

E. springmvc怎么实现多文件上传

多文件上传其实很简单，和上传其他相同的参数如checkbox一样，表单中使用相同的名称，然后action中将MultipartFile参数类定义为数组就可以。
接下来实现：
1、创建一个上传多文件的表单：
在CODE上查看代码片派生到我的代码片
<body>
<h2>上传多个文件实例</h2>
<form action="filesUpload.html" method="post"
enctype="multipart/form-data">
<p>
选择文件:<input type="file" name="files">
<p>
选择文件:<input type="file" name="files">
<p>
选择文件:<input type="file" name="files">
<p>
<input type="submit" value="提交">
</form>
</body>
2、编写处理表单的action，将原来保存文件的方法单独写一个方法出来方便共用：
[java] view plain
print?在CODE上查看代码片派生到我的代码片
/***
* 保存文件
* @param file
* @return
*/
private boolean saveFile(MultipartFile file) {
// 判断文件是否为空
if (!file.isEmpty()) {
try {
// 文件保存路径
String filePath = request.getSession().getServletContext().getRealPath("/") + "upload/"
+ file.getOriginalFilename();
// 转存文件
file.transferTo(new File(filePath));
return true;
} catch (Exception e) {
e.printStackTrace();
}
}
return false;
}
3、编写action:
@RequestMapping("filesUpload")
public String filesUpload(@RequestParam("files") MultipartFile[] files) {
//判断file数组不能为空并且长度大于0
if(files!=null&&files.length>0){
//循环获取file数组中得文件
for(int i = 0;i<files.length;i++){
MultipartFile file = files[i];
//保存文件
saveFile(file);
}
}
// 重定向
return "redirect:/list.html";
}

F. spring mvc 上传文件到指定文件夹代码 {使用file 浏览文件 }

步骤：1，导入文件上传jar包
2，配置


<bean id="multipartResolver" class="org.springframework.web.multipart.commons.CommonsMultipartResolver" />
3，jsp:<form action="xxx" method="post" enctype="multipart/form-data">
4.public String StartAdd(@RequestParam("files") MultipartFile file),其中files是jsp<input type="file" name="files"/>中的name名
5.
String hzstr = file.getOriginalFilename();//得到文件名称
hzstr = hzstr.substring(hzstr.lastIndexOf("."));//获取后缀名
File filenew = new File(uploadFile + "\\" + guidFile + hzstr);//指定文件夹
file.transferTo(filenew);

G. 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;
}
}

H. spring文件上传

万变不离其宗，要实现文件的上传需要对应的JAR包：
1、commons-fileupload-1.2.2.jar
2、commons-io-2.0.1.jar

I. 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

J. 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>

<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">


<bean class="org.springframework.web.servlet.mvc.annotation." lazy-init="false" />


<bean class="org.springframework.web.servlet.mvc.annotation." />


<bean class="org.springframework.web.servlet.view.InternalResourceViewResolver" p:prefix="/WEB-INF/jsp/" p:suffix=".jsp" />


<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>

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