A. spring mvc 怎麼實現上傳文件
在springmvc配置文件中這樣配置:
<bean id="multipartResolver" class="org.springframework.web.multipart.commons.CommonsMultipartResolver">
<!-- 編碼設置 -->
<property name="defaultEncoding" value="utf-8"/>
<!-- 上傳文件大小 -->
<property name="maxUploadSize" value="-1"/>
<!--推遲文件解析,以便在UploadAction中捕獲文件大小異常-->
<property name="resolveLazily" value="true"/>
</bean>
頁面:
<form action="upload.action" method="post" enctype="multipart/form-data">
<input type="file" name="fileUpload" />
<input type="submit" value="上傳" />
</form>
後台:
@Controller
public class UploadAction implements ServletContextAware {
private ServletContext context;
@RequestMapping("/upload")
public String upload(HttpServletRequest request) throws Exception{
//轉換請求為文件上傳請求
MultipartHttpServletRequest mrequest=(MultipartHttpServletRequest)request;
MultipartFile mfile=mrequest.getFile("file");
if(!mfile.isEmpty()){//判斷文件是否為空
path=context.getRealPath("/upload")+File.separator+mfile.getOriginalFilename();
File file=new File(path);
mfile.transferTo(file);//保存文件
}
return "跳轉頁面";
}}
B. spring mvc上傳文件到指定的文件夾中,新手不會,
第一個參數是你的前台傳遞進來的文件。
第二個參數是request對象。
第三個參數是spring mvc 綁定數據用的對象。
根據你的代碼 你的第三個參數可以不要。
第一個參數 是前台form當中有個類似於<input type="file" name="file"/>的控制項傳遞過來的文件。
C. spring mvc 實現多個文件上傳 List<MultipartFile> files = request.getFiles("file"); 報錯
CommonsMultipartResolver multipartResolver = new CommonsMultipartResolver(request.getSession().getServletContext());
//判斷request是否有文件需要上傳
if (multipartResolver.isMultipart(request)) {
//轉換成多部分request
MultipartHttpServletRequest multiRequest = (MultipartHttpServletRequest) request;
//讀取文件
List<MultipartFile> file = multiRequest.getFiles("file");
D. springmvc怎麼實現文件上傳
springmvc怎麼實現文件上傳
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 {
/** 日誌對象*/
private Log logger = LogFactory.getLog(this.getClass());
private static final long serialVersionUID = 1L;
/** 上傳目錄名*/
private static final String uploadFolderName = "uploadFiles";
/** 允許上傳的擴展名*/
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");
//清除上次上傳進度信息
String curProjectPath = session.getServletContext().getRealPath("/");
String saveDirectoryPath = curProjectPath + "/" + uploadFolderName;
File saveDirectory = new File(saveDirectoryPath);
logger.debug("Project real path [" + saveDirectory.getAbsolutePath() + "]");
// 判斷文件是否存在
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怎麼實現多文件上傳
多文件上傳其實很簡單,和上傳其他相同的參數如checkbox一樣,表單中使用相同的名稱,然後action中將MultipartFile參數類定義為數組就可以。
接下來實現:
1、創建一個上傳多文件的表單:
在CODE上查看代碼片派生到我的代碼片
<body>
<h2>上傳多個文件 實例</h2>
<form action="filesUpload.html" method="post"
enctype="multipart/form-data">
<p>
選擇文件:<input type="file" name="files">
<p>
選擇文件:<input type="file" name="files">
<p>
選擇文件:<input type="file" name="files">
<p>
<input type="submit" value="提交">
</form>
</body>
2、編寫處理表單的action,將原來保存文件的方法單獨寫一個方法出來方便共用:
[java] view plain
print?在CODE上查看代碼片派生到我的代碼片
/***
* 保存文件
* @param file
* @return
*/
private boolean saveFile(MultipartFile file) {
// 判斷文件是否為空
if (!file.isEmpty()) {
try {
// 文件保存路徑
String filePath = request.getSession().getServletContext().getRealPath("/") + "upload/"
+ file.getOriginalFilename();
// 轉存文件
file.transferTo(new File(filePath));
return true;
} catch (Exception e) {
e.printStackTrace();
}
}
return false;
}
3、編寫action:
@RequestMapping("filesUpload")
public String filesUpload(@RequestParam("files") MultipartFile[] files) {
//判斷file數組不能為空並且長度大於0
if(files!=null&&files.length>0){
//循環獲取file數組中得文件
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 上傳文件到指定文件夾 代碼 {使用file 瀏覽文件 }
步驟:1,導入文件上傳jar包
2,配置
<!-- 支持上傳文件 -->
<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();//得到文件名稱
hzstr = hzstr.substring(hzstr.lastIndexOf("."));//獲取後綴名
File filenew = new File(uploadFile + "\\" + guidFile + hzstr);//指定文件夾
file.transferTo(filenew);
G. 如何使用springmvc實現文件上傳
在現在web應用的開發,springMvc使用頻率是比較廣泛的,現在給大家總結一下springMvc的上傳附件的應用,希望對大家有幫助,廢話不多說,看效果
准備jar包
4.准備上傳代碼
@Controller//spring使用註解管理bean
@RequestMapping("/upload")//向外暴露資源路徑,訪問到該類
public class UploadController {
/**
* 上傳功能
* @return
* @throws IOException
*/
@RequestMapping("/uploadFile")//向外暴露資源路徑,訪問到該方法
public String uploadFile(MultipartFile imgFile,HttpServletRequest req) throws IOException{
if(imgFile != null ){
//獲取文件輸入流
InputStream inputStream = imgFile.getInputStream();
//隨機產生文件名,原因是:避免上傳的附件覆蓋之前的附件
String randName = UUID.randomUUID().toString();//隨機文件名
//獲取文件原名
String originalFilename = imgFile.getOriginalFilename();
//獲取文件後綴名(如:jpgpng...)
String extension = FilenameUtils.getExtension(originalFilename);
//新名字
String newName = randName+"."+extension;
//獲取servletContext
ServletContext servletContext = req.getSession().getServletContext();
//獲取根路徑
String rootPath = servletContext.getRealPath("/");
File file = new File(rootPath,"upload");
//判斷文件是否存在,若不存在,則創建它
if(!file.exists()){
file.mkdirs();
}
//獲取最終輸出的位置
FileOutputStream fileOutputStream = new FileOutputStream(new File(file,newName));
//上傳附件
IOUtils.(inputStream, fileOutputStream);
}
return null;
}
}
H. spring文件上傳
萬變不離其宗,要實現文件的上傳需要對應的JAR包:
1、commons-fileupload-1.2.2.jar
2、commons-io-2.0.1.jar
I. springmvc 怎麼將文件上傳到linux伺服器
Spring MVC為文件上傳提供了直接的支持,這種支持是通過即插即用的MultipartResolver實現的。Spring使用Jakarta Commons FileUpload 技術實現了一個MultipartResolver實現類:CommonsMultipartResolver。
Spring MVC上下文中默認沒有裝配MultipartResolver,因此默認情況下不能處理文件的上傳工作。如果想要使用Spring的文件上傳功能,需要先在上下文中配置MultipartResolver。
第一步:配置MultipartResolver
使用CommonsMultipartResolver配置一個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必須和用戶JSP的pageEncoding屬性一致,以便正確讀取表單的內容。uploadTempDir是文件上傳過程所使用的臨時目錄,文件上傳完成後,臨時目錄中的臨時文件會被自動清除。
第二步:編寫文件上傳表單頁面和控制器
JSP頁面如下:
<%@ 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>選擇上傳文件</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:負責上傳的表單和一般表單有一些區別,表單的編碼類型必須是"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會將上傳文件綁定到MultipartFile對象中。MultipartFile提供了獲取上傳文件內容、文件名等內容,通過transferTo方法還可將文件存儲到硬體中,具體說明如下:
byte[] getBytes() :獲取文件數據
String getContentType():獲取文件MIME類型,如image/pjpeg、text/plain等
InputStream getInputStream():獲取文件流
String getName():獲取表單中文件組件的名字
String getOriginalFilename():獲取上傳文件的原名
long getSize():獲取文件的位元組大小,單位為byte
boolean isEmpty():是否有上傳的文件
void transferTo(File dest):可以使用該文件將上傳文件保存到一個目標文件中
源碼:uploadtest.zip
J. springmvc怎麼上傳文件
spring mvc(註解)上傳文件的簡單例子,這有幾個需要注意的地方
1.form的enctype=」multipart/form-data」 這個是上傳文件必須的
2.applicationContext.xml中 <bean id=」multipartResolver」 class=」org.springframework.web.multipart.commons.CommonsMultipartResolver」/> 關於文件上傳的配置不能少
大家可以看具體代碼如下:
web.xml
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<?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>
<!-- 攔截所有以do結尾的請求 -->
<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">
<!-- 啟動Spring MVC的註解功能,完成請求和註解POJO的映射 -->
<bean class="org.springframework.web.servlet.mvc.annotation." lazy-init="false" />
<!-- 另外最好還要加入,不然會被 XML或其它的映射覆蓋! -->
<bean class="org.springframework.web.servlet.mvc.annotation." />
<!-- 對模型視圖名稱的解析,即在模型視圖名稱添加前後綴 -->
<bean class="org.springframework.web.servlet.view.InternalResourceViewResolver" p:prefix="/WEB-INF/jsp/" p:suffix=".jsp" />
<!-- 支持上傳文件 -->
<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
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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("開始");
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
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<%@ page pageEncoding="utf-8"%>
<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8">
<title>上傳圖片</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
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<%@ page pageEncoding="utf-8"%>
<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8">
<title>上傳結果</title>
</head>
<body>
<img alt="" src="${fileUrl }" />
</body>
</html>