File Handler Proxy.java with Generic

Proxy.java

package com.wego.web.pxy;
 
import java.io.File;
import java.text.SimpleDateFormat;
import java.util.Date;
import java.util.function.BiFunction;
import java.util.function.BiPredicate;
import java.util.function.Function;
import org.springframework.stereotype.Component;
 
@Component
public class Proxy {
    public int integer(String param) {
        Function<String, Integer> f = Integer :: parseInt;
        return f.apply(param);
    }
    public String string(Object param) {
        Function<Object, String> f = String :: valueOf;
        return f.apply(param);
    }
    public boolean equals(String p1, String p2) {
        BiPredicate<String, String> b = String :: equals;
        return b.test(p1, p2);
    }
    public int random(int a, int b) {
        BiFunction<Integer, Integer, Integer> f =(t,u)->(int)(Math.random()*(u-t))+t;
        return f.apply(a, b);
        
    }
    public int[] array(int size) {
        Function<Integer, int[]> f = int[] :: new;
        return f.apply(size);
    }
    public String currentDate() {
        return new SimpleDateFormat("yyyy-MM-dd").format(new Date());
    }
    public String currentTime() {
        return new SimpleDateFormat("yyyy-MM-dd hh:mm:ss").format(new Date());
    }
    public File makeDir(String t, String u) {
        BiFunction<String,String, File> f = File::new;
        return f.apply(t, u);
    }
    public File makeFile(File t, String u) {
        BiFunction<File,String, File> f = File::new;
        return f.apply(t, u);
    }
    
    
}
 
 

40 ~ 47 번 라인: 파일처리 기능을 프록시에 추가합니다.

 

package com.wego.web.pxy;
 
import java.io.File;
import java.util.HashMap;
import java.util.function.BiFunction;
 
import org.springframework.stereotype.Component;
 
import lombok.Data;
@Data 
@Component("gfile")
public class GenFile<T> {
    
    private File file;
 
    public File makeFile(T t1, String t2) {
        HashMap<String, T> o = new HashMap<>();
        o.put("T", t1);
        
        if(o.get("T") instanceof String) {
            file = new File((String)o.get("T"),t2);
        }else  if(o.get("T") instanceof File){
            System.out.println(">>> "+(File)o.get("T"));
            file = new File((File)o.get("T"),t2);
        }
        return file;
    }
    /*
     File uploadPath = new GenFile<String>().makeFile(uploadFolder, getFolder());
        System.out.println("파일경로 1: "+uploadPath.getPath());
     File savedFile = new GenFile<File>().makeFile(uploadPath, "");
         System.out.println("파일경로 1: "+savedFile.getPath());
     * */
 

파일제네릭 객체를 생ㅅ성합니다.

 

package com.wego.web.pxy;
 
import java.io.File;
import java.util.UUID;
import java.util.function.BiFunction;
import java.util.function.Function;
 
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Component;
import org.springframework.web.multipart.MultipartFile;
 
import com.wego.web.enums.Path;
@Component("filemgr")
public class FileProxy extends Proxy{
    
    public void fileupload(MultipartFile[] uploadFile) {
        String uploadFolder = Path.UPLOAD_PATH.toString();
        File uploadPath = makeDir(uploadFolder, getFolder());
        
        if(uploadPath.exists() == false) {
            uploadPath.mkdirs();
        }
        final String s = getFolder();
        for(MultipartFile m : uploadFile) {
            String fname = m.getOriginalFilename();
            String extension = fname.substring(fname.lastIndexOf(".")+1);
            fname = fname.substring(fname.lastIndexOf("\\")+1, fname.lastIndexOf("."));
            File savedFile = makeFile(uploadPath, fname+"-"+UUID.randomUUID().toString()+"."+extension);
            try {
                m.transferTo(savedFile);
            } catch (Exception e) {
                e.printStackTrace();
            } 
        }
    }
    
    public String getFolder() {
        return currentDate().replace("-", File.separator);
    }
}

14번: 프록시 객체를 상속받아서 18번 makeDir 를 통해 기존에 파일이나 디렉토리가 있으면 추가작동하는

에러를 막을 수 있습니다.