SpringMvc文件上传

在Spring-mvc.xml注入bean

    <!-- 配置文件上传，如果没有使用文件上传可以不用配置，当然如果不配，那么配置文件中也不必引入上传组件包 -->
    <bean id="multipartResolver"
        class="org.springframework.web.multipart.commons.CommonsMultipartResolver">
        <!-- 默认编码 -->
        <property name="defaultEncoding" value="utf-8" />
        <!-- 文件大小最大值 -->
        <property name="maxUploadSize" value="10485760000" />
        <!-- 内存中的最大值 -->
        <property name="maxInMemorySize" value="40960" />
    </bean>

如果想要在model里面进行文件上传到数据库中则

package cn.lonecloud.model;

import java.io.Serializable;
import java.util.List;

import org.springframework.web.multipart.MultipartFile;

public class Test implements Serializable{

    private String id;
    
    private String name;
    
    private String price;
    //文件上传List
    private List<MultipartFile> files;

    public String getId() {
        return id;
    }

    public void setId(String id) {
        this.id = id;
    }

    public String getName() {
        return name;
    }

    public void setName(String name) {
        this.name = name;
    }

    public String getPrice() {
        return price;
    }

    public void setPrice(String price) {
        this.price = price;
    }

    public List<MultipartFile> getFiles() {
        return files;
    }

    public void setFiles(List<MultipartFile> files) {
        this.files = files;
    }
    
    
}

Controller层代码

    /**
     * 将文件封装在Model里面
     * @Description: 
     * @param request 用来获取路径
     * @param test 封装类
     * @param model 返回模型
     * @return
     */
    @RequestMapping("save")
    public String saveTest(HttpServletRequest request,
            @ModelAttribute Test test, Model model) {
        List<MultipartFile> files = test.getFiles();//获取文件
        List<String> fileNames = new ArrayList<>();
        if (null != files && files.size() != 0) {//判断空
            for (MultipartFile multipartFile : files) {
                String fileName = multipartFile.getOriginalFilename();
                String realPath = request.getServletContext().getRealPath(
                        "/file");//获取路径
                fileNames.add(fileName);
                File parents = new File(realPath);
                if (!parents.exists()) {
                    parents.mkdirs();
                }
                File destFile = new File(parents, fileName);
                try {
                    multipartFile.transferTo(destFile);//拷贝文件
                } catch (IllegalStateException e) {
                    // TODO Auto-generated catch block
                    e.printStackTrace();
                } catch (IOException e) {
                    // TODO Auto-generated catch block
                    e.printStackTrace();
                }
            }
        }
        model.addAttribute("test", test);
        return "fileUpload/details";
    }

直接暴露在控制层当做参数使用

    /**
     * 直接文件获取
     * @Description: 
     * @param request
     * @param files
     * @param result
     * @return
     */
    @RequestMapping("/saveFile")
    public String saveFile(@RequestParam("files") List<MultipartFile> files,HttpServletRequest request) {
//        public String saveFile(@RequestParam("files") CommonsMultipartFile[] files,HttpServletRequest request) {
        List<String> fileNames = new ArrayList<>();
        System.out.println(files);
        
        if (null != files && files.size() != 0) {
//        if (null != files && files.length != 0) {
            for (MultipartFile multipartFile : files) {
                String fileName = multipartFile.getOriginalFilename();
                String realPath = request.getServletContext().getRealPath(
                        "/file");
                fileNames.add(fileName);
                File parents = new File(realPath);
                if (!parents.exists()) {
                    parents.mkdirs();
                }
                File destFile = new File(parents, fileName);
                try {
                    multipartFile.transferTo(destFile);
                } catch (IllegalStateException e) {
                    // TODO Auto-generated catch block
                    e.printStackTrace();
                } catch (IOException e) {
                    // TODO Auto-generated catch block
                    e.printStackTrace();
                }
            }
        }
        return "fileUpload/details";
    }

 uploadFile.jsp

<%@ page language="java" contentType="text/html; charset=UTF-8"
    pageEncoding="UTF-8"%>
<%@ taglib uri="http://www.springframework.org/tags/form" prefix="form" %>
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
<title>Insert title here</title>
</head>
<body>
    <form:form action="save" enctype="multipart/form-data" method="post" commandName="test">
        select a file<input type="file" name="files" multiple><!-- 单文件上传 --><br>
        select files<!-- <input type="file" name="files" multiple> --><!-- 多文件上传 --><br>
        <input type="submit" value="上传">
    </form:form>
</body>
</html>