/*查看目录下所有的文件*/
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package cn.file; import java.io.File;public class Text2 {public static void main(String[] args) {File a=new File("F:\\图片");File a1=new File("F:\\你的");chek(a1);}public static void chek(File f3) {//查看目录下的所有文件if(f3.exists()){ if(f3.isDirectory()){File [] f=f3.listFiles();//查看目录的文件for(int i=0;i<f.length;i++){chek(f[i]);}}else {System.out.println(f3);};}}
复制子目录
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import java.io.BufferedInputStream; import java.io.BufferedOutputStream; import java.io.File; import java.io.FileInputStream; import java.io.FileNotFoundException; import java.io.FileOutputStream; import java.io.FileReader; import java.io.FileWriter; import java.io.IOException; import java.io.Reader; import java.io.Writer;//练习：关于目录的拷贝？public class Text6 { // 缓冲区大小private static final int buffer_size = 1024*2; // 源和目标检测private static void doCopy(File src, File dst)throws IOException { if (src.isFile()) { copyFile(src, dst); } else { File dir = copyDirectory(src, dst); File[] files = src.listFiles(); if (files.length == 0) { } else { for (File file : files) { doCopy(file, dir); } } } } // 拷贝实现public static void copy(File src, File dst) throws IOException { doCopy(src, dst); } // 文件拷贝private static void copyFile(File src, File dst) throws IOException { File file = new File(dst, src.getName()); copy(new BufferedInputStream(new FileInputStream(src)), new BufferedOutputStream(new FileOutputStream(file))); } // 目录拷贝 要在目标设备中创建目录private static File copyDirectory(File src, File dst) { File file = new File(dst, src.getName()); file.mkdir(); return file; } // 拷贝private static int copy(BufferedInputStream in, BufferedOutputStream out) throws IOException { int byteCount = 0; // 问号 byteCount try { int bytesReader = 0; byte [] buffer = new byte[buffer_size]; while ((bytesReader = in.read(buffer)) != -1) { out.write(buffer, 0, bytesReader); byteCount += bytesReader; } out.flush(); } finally { in.close(); out.close(); } return byteCount; } public static void main(String[] args)throws IOException {File a=new File("F:\\测试的文件");File b=new File("F:\\我的");copy(a,b); System.out.println("finish.................");}}
给文件改名
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import java.io.BufferedInputStream; import java.io.BufferedOutputStream; import java.io.File; import java.io.FileInputStream; import java.io.FileOutputStream; import java.io.IOException;public class Text1{public static void main(String[] args)throws IOException {File a=new File("F:\\测试的文件\\我的");File b=new File("F:\\测试的文件\\我的");copyList(a,b);}public static void copyList(File a,File b )throws IOException{//第一步File c=a;BufferedInputStream bis=null;BufferedOutputStream bos=null;byte bs []=new byte [1024];if (!b.exists()){ //判断b的文件夹是否存在 b.mkdir();}if(c.isDirectory()){File d [] =c.listFiles();//得到目录文件的数组if(d!=null){//判断文件目录是否为空for (int i=0;i<d.length;i++){copyList(d[i],b);//递归查询//System.out.println(d[i]);//查看目录里的文件if(d[i].isFile()){if(d[i].getName().endsWith(".jpg")){//根据条件判断的复制int rel=0;bis=new BufferedInputStream(new FileInputStream(d[i]));bos=new BufferedOutputStream(new FileOutputStream(new File(b,i+".jpg")));while((rel=bis.read(bs))!=-1){bos.write(bs, 0, rel);bos.flush();}bos.close();bis.close();d[i].delete();//复制后删去复制的文件 这样看起来像是剪切 }}}} }else{System.out.println(c);}} }
/**过滤后复制文件夹*/
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import java.io.BufferedInputStream; import java.io.BufferedOutputStream; import java.io.File; import java.io.FileInputStream; import java.io.FileOutputStream; import java.io.IOException;//经典过滤方案 用到 iO流 递归 public class Text4 {public static void print(File dir,File f2 )throws IOException{//判断鱼塘是否存在if (dir!=null){//判断鱼塘是否有鱼if (dir.isDirectory()){//把鱼塘里面所有东西装箱File f []=dir.listFiles();//判断箱子是否为空if (f!=null){//遍历箱子里面的东西for (int i=0;i<f.length;i++){//假如箱子里还有箱子就继续打开 print(f[i],f2);if (f[i].isFile()){String name =f[i].getName();if(name.endsWith(".jpg")){BufferedInputStream bi=new BufferedInputStream(new FileInputStream(f[i]));BufferedOutputStream bo=new BufferedOutputStream(new FileOutputStream(new File(f2,f[i].getName())));int rel=0;byte [] bs=new byte [1024];while((rel=bi.read(bs))!=-1){bo.write(bs,0,rel);bo.flush(); //f[i].delete();//复制后删去复制的文件 这样看起来像是剪切 }}} } }else{//System.out.println(dir); };}}}public static void main(String[] args) throws IOException {File f1=new File("F:\\音乐");File f2=new File("D:\\速度1");print(f1,f2);System.out.println("复制成功");//print(new File("F:"+File.separator+"音乐"));//System.out.println("遍历文件夹"); } }
/*删除文件与文件夹*/
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import java.io.File; import java.io.IOException;public class Text3 {public static void main(String[] args) throws IOException {File f=new File("F:\\我的");delect(f);}public static void delect(File s){File b []=null;if(s.exists()){//判读是否存在if(s.isDirectory()){//判断是不是目录b=s.listFiles(); if(b!=null){for(int i=0;i<b.length;i++){if(b[i].isFile()){ //判断是不是目录b[i].delete();//删除子文件}else{delect(b[i]);//递归b[i].delete();}//删除子目录 }}}else{s.delete();};s.delete();}} }
)
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