把文件上传到网页（把文件上传到网页上）

<!DOCTYPE html>
html
head
meta charset="UTF-8"
title上传文件title
head
body
form action="uploadServlet" method="post" enctype="multipart/form-data"
文件：input type="file" name="myfile"
input type="submit" value="上传"
form
body
html

public class UploadServlet extends HttpServlet {
private static final long serialVersionUID = 1L;

protected void service(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
// 设定编码，可以获取中文文件名
request.setCharacterEncoding("UTF-8");
// 获取tomcat下的upload目录的路径
String path = getServletContext().getRealPath("/upload");
// 临时文件目录
String tempPath = getServletContext().getRealPath("/temp");
// 检查我们是否有文件上传请求
// boolean isMultipart = ServletFileUpload.isMultipartContent(req);
// 1、声明DiskFileItemFactory工厂类，用于在指定磁盘上设置一个临时目录
DiskFileItemFactory disk = new DiskFileItemFactory(1024 * 10, new File(tempPath));
// 2、声明ServletFileUpload，接收上面的临时文件。也可以默认值
ServletFileUpload up = new ServletFileUpload(disk);
// 3、解析request
try {
List<FileItem> list = up.parseRequest(request);
if (list.size() > 0) {
for (FileItem file : list) {
// 判断是否是普通的表单项
if (file.isFormField()) {
String fieldName = file.getFieldName();
// 中文乱码，此时还需要指定获取数据的编码方式
// String value = file.getString();
String value = file.getString("UTF-8");
System.out.println(fieldName + "=" + value);
} else { // 说明是一个文件
// 获取文件本身的名称
String fileName = file.getName();
System.out.println(file.getFieldName());
// 处理文件名称
fileName = fileName.substring(fileName.lastIndexOf("\") + 1);
System.out.println("old Name : " + fileName);
// 修改名称
String extName = fileName.substring(fileName.lastIndexOf("."));
String newName = UUID.randomUUID().toString().replace("-", "") + extName;
// 保存新的名称，并写出到新文件中
file.write(new File(path + "/" + newName));
System.out.println("文件名是：" + fileName);
System.out.println("文件大小是：" + file.getSize());
file.delete();
}
}
}
} catch (FileUploadException e) {
e.printStackTrace();
} catch (Exception e) {
e.printStackTrace();
}
}

}

<!DOCTYPE html>
html
head
meta charset="UTF-8"
title上传文件title
head
body
form action="upload" method="post" enctype="multipart/form-data"
姓名：input type="text" name="uname"
文件：input type="file" name="myfile"
input type="submit" value="上传"
form
body
html

@WebServlet("/upload")
@MultipartConfig
public class UploadServlet extends HttpServlet {
private static final long serialVersionUID = 1L;

protected void service(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
System.out.println("上传文件...");
// 设置编码
request.setCharacterEncoding("UTF-8");
// 获取普通表单项参数
String uname = request.getParameter("uname");
System.out.println(uname);
// 上传文件
// 得到part对象 request.getpart(name)：name代表的是表单中file元素的name属性值
Part part = request.getPart("myfile");
// 得到文件存放的路径
String path = request.getServletContext().getRealPath("/");
// 得到文件名
String fileName = part.getSubmittedFileName();
// 上传
part.write(path + fileName);
}

}

dependency

groupIdcommons-fileuploadgroupId

artifactIdcommons-fileuploadartifactId

version1.3.2version

dependency

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

property name="maxUploadSize"

value104857600value

property

property name="maxInMemorySize"

value4096value

property

bean

import java.io.File;

import java.io.IOException;

import javax.servlet.http.HttpServletRequest;

import org.springframework.stereotype.Controller;

import org.springframework.web.bind.annotation.RequestMapping;

import org.springframework.web.multipart.MultipartFile;

import org.springframework.web.multipart.MultipartHttpServletRequest;

import org.springframework.web.servlet.ModelAndView;

@Controller

public class FileController {

@RequestMapping("/uploadFile")

public ModelAndView uploadFile(HttpServletRequest request){

ModelAndView mv=new ModelAndView();

mv.setViewName("result");

MultipartHttpServletRequest mr=(MultipartHttpServletRequest) request;

MultipartFile multipartFile= mr.getFile("file");

String path=request.getSession().getServletContext().getRealPath("upload");

System.out.println(path);

if(null!=multipartFile&&!multipartFile.isEmpty()){

String fileName=multipartFile.getOriginalFilename();

try {

multipartFile.transferTo(new File(path,fileName));

mv.addObject("msg", "文件上传成功!");

} catch (Exception e) {

mv.addObject("msg", "上传失败!");

e.printStackTrace();

}

}

return mv;

}

}

form action="uploadFile" method="post" enctype="multipart/form-data"

input type="file" name="file"

button type="submit" 提交button

form

把文件上传到网页（把文件上传到网页上）

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