编写程序，拷贝一个带内容的文件夹

向右看齐 2022-06-16 10:25 172阅读 0赞

package com.heima.question8;
    
    import static org.junit.Assert.assertEquals;
    
    import java.io.File;
    import java.io.FileInputStream;
    import java.io.FileNotFoundException;
    import java.io.FileOutputStream;
    import java.io.IOException;
    
    import org.junit.Test;
    /**
     * @author Alex Zhuang
     *
     */
    public class FileCopy {
    	
    	@Test
    	public static void testCopyFolder(){
    		String sourceFilePath="D:\\java_test";
    		String targetFilePath="D:\\alex-test";
    		copyFile(sourceFilePath , targetFilePath);
    		System.out.println("Copy complete...");
    		int sourceFileNum = new File(sourceFilePath).listFiles().length;
    		int targetFileNum = new File(targetFilePath+ "\\"+new File(sourceFilePath).getName()).listFiles().length;
    		assertEquals(sourceFileNum,targetFileNum);	
    	}
    	
    	@Test
    	public static void testCopyFile(){
    		String sourceFilePath="D:\\test1.txt";
    		String targetFilePath="D:\\alex-test";
    		copyFile(sourceFilePath , targetFilePath);
    		System.out.println("Copy complete...");
    		assertEquals(true,new File(targetFilePath+"\\"+new File(sourceFilePath).getName()).isFile());
    	}
    	
    	/**
    	 * 如需测试，请先把”第8题测试“文件夹中的文件复制到D盘根目录
    	 */
    	public static void main(String[] args){
    		testCopyFolder();
    		testCopyFile();
    	}
    	
    	
    	/**
    	 * @param sourceFilePath 文件复制源
    	 * @param targetFilePath 文件复制目标端
    	 */
    	public static void copyFile(String sourceFilePath , String targetFilePath){
    		File sourceFile = new File(sourceFilePath);
    		File[] sourceFiles = null;
    		if(sourceFile.isDirectory()){
    			targetFilePath +="\\"+sourceFile.getName();
    			File targetFile = new File(targetFilePath);
    			targetFile.mkdirs();
    			sourceFiles = sourceFile.listFiles();
    		}else if(sourceFile.isFile()){
    			sourceFiles = new File[]{sourceFile};
    		}
    		
    		for(int i=0;i<sourceFiles.length;i++){
    			if(sourceFiles[i].isDirectory()){				
    				String newSourceFilePath= sourceFilePath + "\\"+sourceFiles[i].getName();
    				copyFile(newSourceFilePath,targetFilePath);
    			}else{
    				try {
    					FileInputStream fis = new FileInputStream(sourceFiles[i]);
    					FileOutputStream fos = new FileOutputStream(targetFilePath+"\\"+sourceFiles[i].getName());
    					int read = -1;
    					while((read=fis.read())!=-1){
    						fos.write(read);
    					}
    					fos.flush();
    					fos.close();
    					fis.close();
    				} catch (FileNotFoundException e) {
    					e.printStackTrace();
    				} catch (IOException e) {
    					e.printStackTrace();
    				}
    			}
    		}
    	}
    }