IO 求大神 - 黑马程序员技术交流社区

package LX;
import java.awt.Window.Type;
import java.io.BufferedInputStream;
import java.io.BufferedOutputStream;
import java.io.BufferedReader;
import java.io.BufferedWriter;
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.InputStream;
import java.io.InputStreamReader;
import java.io.OutputStream;
import java.io.OutputStreamWriter;
import java.util.ArrayList;
import java.util.Iterator;
public class Demo16LX1 {
public static void main(String[] args) throws IOException {
File lu = new File("D:\\");
ChaZ(lu,".java");
}
private static void ChaZ(File lu,String zhi) throws IOException {
FileOutputStream out = new FileOutputStream("P:\\哈喽\\筛选后的结果.txt"); //创建个文件输出流
OutputStreamWriter qiao = new OutputStreamWriter(out); //创建个桥梁
File[] suzu = lu.listFiles(new lianxi(zhi)); //获取目录下所有文件放到File数组中
for(File a : suzu) //循环遍历数组中的每一个元素
{
if(a.isDirectory()) //判断这个数组是否是文件夹
{
ChaZ(a,".java"); //如果是文件夹则用这个文件夹的目录重新调用这个方法
}
else
{
if(a.isFile())
{
String lujing = a.getAbsolutePath(); //把这个文件的绝对路径获取到
qiao.write(lujing);
qiao.flush();
}
}
}
qiao.close();
}
}
[code]package LX;
import java.io.File;
import java.io.FilenameFilter;
public class lianxi implements FilenameFilter {
private String zhi;
public lianxi(String zhi)
{
this.zhi = zhi;
}
@Override
public boolean accept(File arg0, String arg1) {
return arg1.endsWith(this.zhi);
}
}

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package LX;
import java.awt.Window.Type;
import java.io.BufferedInputStream;
import java.io.BufferedOutputStream;
import java.io.BufferedReader;
import java.io.BufferedWriter;
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.InputStream;
import java.io.InputStreamReader;
import java.io.OutputStream;
import java.io.OutputStreamWriter;
import java.util.ArrayList;
import java.util.Iterator;
public class Demo16LX1 {
public static void main(String[] args) throws IOException {
File lu = new File("D:\\");
ChaZ(lu,".java");
}
private static void ChaZ(File lu,String zhi) throws IOException {
FileOutputStream out = new FileOutputStream("P:\\哈喽\\筛选后的结果.txt",true); //创建个文件输出流
OutputStreamWriter qiao = new OutputStreamWriter(out); //创建个桥梁
File[] suzu = lu.listFiles(new lianxi(zhi)); //获取目录下所有文件放到File数组中
for(File a : suzu) //循环遍历数组中的每一个元素
{
if(a.isDirectory()) //判断这个数组是否是文件夹
{
ChaZ(a,zhi); //如果是文件夹则用这个文件夹的目录重新调用这个方法
}
else
{
if(a.isFile())
{
String lujing = a.getAbsolutePath(); //把这个文件的绝对路径获取到
qiao.write(lujing);
qiao.flush();
}
}
}
qiao.close();
}
}

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import java.io.*;
public class ListFileDemo
{
public static void main(String[] args) throws Exception
{
File file = new File("D:\\software");// 想要遍历的文件夹
BufferedWriter bw = new BufferedWriter(new FileWriter("d:\\list.txt"));// 遍历结果的存放位置
String endstr = ".java";//遍历文件的结束标志
listFile(file, bw, endstr);
bw.close();
}
public static void listFile(File f, BufferedWriter bw, String endstr)
throws IOException
{
File[] files = f.listFiles();
for (File file : files)
{
if (file.isDirectory())
{
listFile(file, bw, endstr);
}
else
{
if (file.getName().endsWith(endstr))
{
bw.write(file.getName());
bw.newLine();
}
}
}
}
}

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