JAVA 校验图片视频属性

1. 需求: 文件上传的时候,需要根据图片或者视频校验尺寸比例和大小是否符合要求

2. 代码

2.1 前期准备

2.1.1. 需要的jar包

1. maven仓库没有这个jar包,需要从网上下载,导入本地

链接：https://www.aliyundrive.com/s/enXJZnujTGf
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2. 在项目根目录新建 lib 文件夹,把jar包放入该文件夹
   

2.1.2. maven配置

导入依赖

<dependency>
    <groupId>it.sauronsoftwaregroupId>
    <artifactId>javeartifactId>
    <version>1.0.2version>
    <scope>systemscope>
    <systemPath>/${project.basedir}/lib/jave-1.0.2.jarsystemPath>
dependency>


<dependency>
     <groupId>cn.hutoolgroupId>
     <artifactId>hutool-allartifactId>
     <version>5.5.8version>
 dependency>
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2.2 代码

@Override
public String uploadFile(MultipartFile multipartFile, String type) throws IOException {
    String result = null;
    String filename = multipartFile.getOriginalFilename();

	//把文件流复制到本地  或者把MultipartFile  转file
    File file = new File(localDirectory + filename);
    FileUtils.copyInputStreamToFile(multipartFile.getInputStream(), file);
    InputStream inputStream = null;
    Double height = 0.0;
    Double width = 0.0;
    long kbSize;
    long duration = 0;

    //  type  1: 图片  2:  icon  3=视频
    if ("1".equals(type)) {
        /*
        校验图片
        宽高比例：9:16、16:9；大小不超过300KB ; 格式：png、jpg、jpeg
         */      
        inputStream = new FileInputStream(file);
        BufferedImage image = ImageIO.read(inputStream);
        height = (double) image.getHeight();
        width = (double) image.getWidth();
        kbSize = cn.hutool.core.io.FileUtil.size(file) / 1024;
       
        if (!isImage(filename)) {
            result = "请上传格式为png、jpg、jpeg的图片!";         
        }
    } else if ("2".equals(type)) {
        /*
        校验icon
       200x200以内,大小不超过200KB，格式：png、jpg、jpeg
         */
       
       inputStream = new FileInputStream(file);
        BufferedImage image = ImageIO.read(inputStream);
        height = (double) image.getHeight();
        width = (double) image.getWidth();  
        kbSize = cn.hutool.core.io.FileUtil.size(file) / 1024;     
        if (!isImage(filename)) {
            result = "请上传格式为png、jpg、jpeg的图片!";         
        }
    } else {
        /*
        校验视频
        宽高比例：9:16、16:9，大小<=10M，5s<=时长格式<=30s，支持4g
         */
        Encoder encoder = new Encoder();  
        MultimediaInfo m = encoder.getInfo(file);
        height = (double) m.getVideo().getSize().getHeight();
        width = (double) m.getVideo().getSize().getWidth();
        //时长  秒
        duration = m.getDuration() / 1000;       
        kbSize = cn.hutool.core.io.FileUtil.size(file) / 1024 ;  
        if (!isVideo(filename)) {
            result = "请上传视频格式的文件!";      
        }
    }
}


private Boolean isImage(String fileName) {
     String reg = "(jpg|jpeg|png)";
     Pattern p = Pattern.compile(reg);
     return p.matcher(fileName).find();
 }
private boolean isVideo(String fileName) {
    String reg = "(mp4|flv|avi|rm|rmvb|wmv)";
    Pattern p = Pattern.compile(reg);
    boolean boo = p.matcher(fileName).find();
    return boo;
}
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