使用SpringMVC如何实现一个文件上传功能

  Select a file
  

package domain;
import org.springframework.web.multipart.MultipartFile;
import java.io.Serializable;
import java.util.List;
public class Product implements Serializable {
  //实现了这个接口，可以安全的将数据保存到HttpSession中
  private long id;
  private String name;
  private String description;
  private String price;
  //在Domain类中加入MultipartFile类型的属性，用来保存上传的文件
  private List images;
  public List getImages() {
    return images;
  }
  public void setImages(List images) {
    this.images = images;
  }
　　......多个get和set方法。

<%@ taglib prefix="form" uri="http://www.springframework.org/tags/form" %>
<%@ page contentType="text/html;charset=UTF-8" language="java" %>


  



  

    
Add a Product
    

      ProductName
      
    
    

      ProductDescription
      
    
    

      ProductPrice
      
    
    

      ProductImage
      
    
    

      
      
    
  

package controller;
import domain.Product;
import Service.ProductService;
import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Controller;
import org.springframework.ui.Model;
import org.springframework.validation.BindingResult;
import org.springframework.web.bind.annotation.ModelAttribute;
import org.springframework.web.bind.annotation.PathVariable;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestMethod;
import org.springframework.web.multipart.MultipartFile;
import javax.servlet.http.HttpServletRequest;
import java.io.File;
import java.io.IOException;
import java.util.List;
@Controller
public class ProductController {
  private static final Log logger=LogFactory.getLog(ProductController.class);
  @Autowired
  private ProductService productService;
  @RequestMapping(value = "/product_input")
  public String inputProduct(Model model)
  {
    logger.info("inputProduct called");
    model.addAttribute("product",new Product());
    return "ProductForm";
  }
  @RequestMapping(value = "/product_save",method = RequestMethod.POST)
  public String saveProduct(HttpServletRequest servletRequest, @ModelAttribute Product product, 
BindingResult bindingResult,Model model)
  {
    List files= product.getImages();
    System.out.println("文件数量是"+files.size());
    if(null!=files&&files.size()>0)
    {
      for (MultipartFile file:files)
      {
        String fileName=file.getOriginalFilename(); //获得文件名称
        File imagFile = new File(servletRequest.getServletContext().getRealPath("/image"),fileName);try {
          file.transferTo(imagFile);//用于将文件写到服务器本地
        } catch (IOException e) {
          e.printStackTrace();
        }
      }
    }
    model.addAttribute("product",product);
    return "ProductDetails";
  }
  @RequestMapping(value = "/product_view/{id}")
  public String viewProduct(@PathVariable Long id,Model model)
  {
    Product product =productService.get(id);
    model.addAttribute("product",product);
    return "ProductDetails";
  }
}

<?xml version="1.0" encoding="UTF-8"?>

  
  
  
  
  
    
    
  
  
  
  
    
  

<?xml version="1.0" encoding="UTF-8"?>

  
    contextConfigLocation
    /WEB-INF/applicationContext.xml
  
  
    org.springframework.web.context.ContextLoaderListener
  
  
    dispatcher
    org.springframework.web.servlet.DispatcherServlet
    1
    
      20848820
      
      418018841
      
      1048576
      
      /image/
      
    
  
  
    dispatcher
    /
  
  
  
    setcharacter
    org.springframework.web.filter.CharacterEncodingFilter
    
      encoding
      UTF-8
    
  
  
    setcharacter
    /*
  
 

MultipartResolver接口的标准实现,基于Servlet 3.0部分API. To be added as "multipartResolver" bean to a Spring DispatcherServlet context, without any extra configuration at the bean level.
 

package domain;
import org.springframework.web.multipart.MultipartFile;
import java.io.Serializable;
public class UploadFile implements Serializable {
  private MultipartFile multipartFile;
  public MultipartFile getMultipartFile() {
    return multipartFile;
  }
  public void setMultipartFile(MultipartFile multipartFile) {
    this.multipartFile = multipartFile;
  }
}

package controller;
import domain.UploadFile;
import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
import org.springframework.stereotype.Controller;
import org.springframework.validation.BindingResult;
import org.springframework.web.bind.annotation.ModelAttribute;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.multipart.MultipartFile;
import javax.servlet.http.HttpServletRequest;
import java.io.File;
@Controller
public class Html5FileUploadController {
  private static final Log logger = LogFactory.getLog(Html5FileUploadController.class);
  @RequestMapping("/html5")
  public String inputProduct()
  {
    return "html5";
  }
  @RequestMapping("/file_upload")
  public void saveFile(HttpServletRequest servletRequest, @ModelAttribute UploadFile file, BindingResult result)
  {
    MultipartFile multipartFile =file.getMultipartFile();
    String filename =multipartFile.getOriginalFilename();
    try {
      File file1 = new File(servletRequest.getServletContext().getRealPath("/image"),filename);
      multipartFile.transferTo(file1);
      System.out.println("已经写人本地文件:"+file1.getName());
    } catch (Exception e) {
      e.printStackTrace();
    }
  }
}

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<%@ page contentType="text/html;charset=UTF-8" language="java" %>


  


  

  
Multipart File Uploads with Progress Bar