spring文件上传
A. 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;
}
}
B. 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";
}
C. 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>
D. 请教spring mvc 的文件上传
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>
E. 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");
F. 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
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<?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
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<?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>
G. 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
H. 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();
}
}
I. 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。