标签：style blog http io color os ar java for
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
applicationContext.xml
- <?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.AnnotationMethodHandlerAdapter" lazy-init="false" />
-
-
- <bean class="org.springframework.web.servlet.mvc.annotation.DefaultAnnotationHandlerMapping" />
-
-
- <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">
- <property name="maxUploadSize" value="10000000000000"/></bean>
-
- </beans>
UploadAction.java
- 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();
- System.out.println(path);
- File targetFile = new File(path, fileName);
- if(!targetFile.exists()){
- targetFile.mkdirs();
- }
-
-
- try {
- // file.transferTo(targetFile);
- //也可以用这种方式，上面的方式能上传，但是老是报输出流被占用的错误。
- SaveFileFromInputStream(
file.getInputStream(), realPath + filePath, name + "."+ fileType);
- } catch (Exception e) {
- e.printStackTrace();
- }
- model.addAttribute("fileUrl", request.getContextPath()+"/upload/"+fileName);
-
- return "result";
- }
-
- }
SaveFileFromInputStream()的实现如下：
public void SaveFileFromInputStream(InputStream stream, String path,
String filename) throws IOException {
{ //path + "/"+ filename
FileOutputStream fs = new FileOutputStream(path + "/"+ filename);
byte[] buffer =new byte[1024*1024];
int bytesum = 0;
int byteread = 0;
while ((byteread=stream.read(buffer))!=-1)
{
bytesum+=byteread;
fs.write(buffer,0,byteread);
fs.flush();
}
fs.close();
stream.close();
}
index.jsp
- <%@ 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>
Spring mvc 文件上传到文件夹（转载+心得）
标签：style blog http io color os ar java for
原文地址：http://www.cnblogs.com/wjwen/p/4054514.html
