MultipartFile
对上传的图片进行处理；
处理大量图片
/**
* 1.判断文件是否为图片 jpg|png|gif
* 2.防止恶意程序 高度和宽度判断
* 3.图片分文件保存 分布式fast|yyyy/MM/dd
* 4.修改文件名称，防止重名 UUID
*/
<%@ page language="java" contentType="text/html; charset=UTF-8"
pageEncoding="UTF-8"%>
<!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>
<h1>实现文件长传</h1>
<!--enctype="开启多媒体标签" -->
<form action="http://localhost:80/file" method="post"
enctype="multipart/form-data">
<input name="fileImage" type="file" />
<input type="submit" value="提交"/>
</form>
</body>
</html>package com.jt.controller;
import java.io.File;
import java.io.IOException;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RestController;
import org.springframework.web.multipart.MultipartFile;
import com.jt.service.FileService;
import com.jt.vo.EasyUIFile;
@RestController
public class FileController {
@Autowired
private FileService fileService;
/*
* 1.准备文件存储目录
* 2.获取文件名称
* 3.利用工具API实现文件上传
*/
@RequestMapping("/file")
public String file(MultipartFile fileImage) throws IllegalStateException, IOException {
File fileDir = new File("E:/java/img");
if(!fileDir.exists()) {
//如果没有目录应该创建目录
fileDir.mkdirs();
}
//获取图片名称
String imgName = fileImage.getOriginalFilename();
String path = "E:/java/img/"+imgName;
//文件实现上传
fileImage.transferTo(new File(path));
return "文件上传成功！";
}
/**
* 实现商品的文件上传
*/
@RequestMapping("/pic/upload")
public EasyUIFile fileUpload(MultipartFile uploadFile) {
return fileService.fileUpload(uploadFile);
}
}
package com.jt.service;
import java.awt.image.BufferedImage;
import java.io.File;
import java.io.IOException;
import java.text.SimpleDateFormat;
import java.util.Date;
import java.util.UUID;
import javax.imageio.ImageIO;
import org.springframework.stereotype.Service;
import org.springframework.web.multipart.MultipartFile;
import com.jt.vo.EasyUIFile;
@Service
public class FileServiceImpl implements FileService{
private String localDir = "E:/java/img/";
/**
* 1.判断文件是否为图片 jpg|png|gif
* 2.防止恶意程序 高度和宽度判断
* 3.图片分文件保存 分布式fast|yyyy/MM/dd
* 4.修改文件名称，防止重名 UUID
*/
@Override
public EasyUIFile fileUpload(MultipartFile uploadFile) {
EasyUIFile easyUIFile = new EasyUIFile();
//1.判断文件是否为图片类型
String fileName = uploadFile.getOriginalFilename();
fileName = fileName.toLowerCase(); //解决文件名后缀是大写的
if(!fileName.matches("^.+\\.(jpg|png|gif)$")) {
//表示不满足规则
return EasyUIFile.fail();
}
//2.判断是否为恶意程序,转化成为图片对象
try {
BufferedImage bufferedImage =
ImageIO.read(uploadFile.getInputStream());
int width = bufferedImage.getWidth();
int height = bufferedImage.getHeight();
if(width==0||height==0) {
return EasyUIFile.fail();
}
//3.实现份文件存储 按照yyyy/MM/dd
String dateDir =
new SimpleDateFormat("yyyy/MM/dd/")
.format(new Date());
//E:/java/img/yyyy/MM/dd
String fileDirPath = localDir +dateDir;
File dirFile = new File(fileDirPath);
if(!dirFile.exists()) {
dirFile.mkdirs();
}
//4.生成文件防止重名 name.type
int index = fileName.lastIndexOf(".");
String fileType =
fileName.substring(index);
String uuid = UUID.randomUUID().toString();
//拼接文件名称
String realFileName = uuid+fileType;
//5.文件实现上传
uploadFile.transferTo(new File(fileDirPath+realFileName));
//暂时使用网络地址代替真正的url地址
easyUIFile.setHeight(height)
.setWidth(width)
.setUrl("https://img11.360buyimg.com/n5/s54x54_jfs/"
+ "t1/63250/39/14040/164985/5db7ff7cE758e2798/91c7367ccef07bc2.jpg");
} catch (IOException e) {
e.printStackTrace();
return EasyUIFile.fail();
}
return easyUIFile;
}
}
