java/android文件操作的工具类代码,Java代码库,德仔网

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【Java】 java/android文件操作的工具类
作者:JanK / 发布于2014/9/20/ 692
包含功能 @文件路径处理 @文件或文件夹获取或创建 @数据流创建工具类 @数据流推送实现方法

	package org.cookie.test;
	
	import java.io.File;
	import java.io.FileNotFoundException;
	import java.io.IOException;
	
	import org.cookie.files.FlieCreater;
	import org.cookie.sreams.StreamChannle;
	import org.cookie.sreams.StreamGetter;
	
	public class TestStreams {
	
	 /**
	 * @param args
	 * @throws IOException
	 * @throws FileNotFoundException
	 */
	 public static void main(String[] args) throws FileNotFoundException, IOException {
	
	 File file1 = FlieCreater.fileGetOrCreate(".", "folder1", "img_assets.gif");//new File("folder1/img_assets.gif");
	 File file2 = FlieCreater.fileGetOrCreate(".", "folder2", "img_assets.gif");
	
	 if (file2!=null) {
	 StreamChannle.put(StreamGetter.getInputStream(file1), StreamGetter.getOutputStream(file2, false));
	 }
	
	 }
	
	}

	

	

	

	package org.cookie.files;
	
	import java.io.File;
	
	public class FilePathGetter {
	
	 //private static final String PATH_RX = "/";
	 public static String getParentPath(String filename) {
	 String rx = File.separator;
	 String subPath = ".";
	 if(filename.indexOf(rx)>=0){//
	 //在包含路径时
	 String[] fsArray = filename.split(rx);
	
	 if(fsArray.length >=2)
	 for (int i = 0; i < fsArray.length -1; i++) {
	 subPath+=File.separator+fsArray[i];
	 }
	 }
	 return subPath;
	 }
	 public static String getPathFileName(String filename) {
	 String rx = File.separator;
	 String name = null;
	 if(filename.indexOf(rx)>=0){//
	 //在包含路径时
	 String[] fsArray = filename.split(rx);
	
	 if(fsArray.length >=1)
	 name = fsArray[fsArray.length -1];
	
	 }else{
	 name = filename;
	 }
	 return name;
	 }
	
	}

	

	

	package org.cookie.files;
	
	import java.io.File;
	import java.io.IOException;
	
	
	
	public class FlieCreater {
	
	 /**
	 *
	 * @param context
	 * @param rootPath
	 * @param subPath
	 * @param filename
	 * @return 当文件名为空时，返回路径的File
	 */
	 @SuppressWarnings("unused")
	 public static File fileGetOrCreate(String rootPath ,String subPath ,String filename) {
	 File dfile = null;
	 String path = rootPath + File.separator + subPath;
	
	 //检测文件夹
	 File pathDir = new File(path);
	 System.out.println(pathDir.getAbsolutePath());
	 if(!pathDir.exists()&& pathDir.mkdirs() ){
	 System.out.println("文件夹创建成功~~");
	 }else if(pathDir.exists()&&pathDir.isDirectory()){
	 }else{
	 return null;
	 }
	 //当文件名为空时，返回路径的File
	 if(filename == "" && filename == null){
	 return pathDir;
	 }
	
	 //检测文件
	 path +=File.separator+filename;
	 dfile = new File(path);
	 System.out.println(dfile.getAbsolutePath());
	 try {
	 if (!dfile.exists()&& dfile.createNewFile()) {
	 System.out.println("文件创建成功~~");
	 }else if(dfile.exists()&& dfile.isFile()){
	 } else {
	 return null;
	 }
	 } catch (IOException e) {
	 e.printStackTrace();
	 return null;
	 }
	
	 //TODO 如果文件已经存在可不可以直接覆盖
	 return dfile;
	 }
	}

	

	package org.cookie.sreams;
	
	import java.io.BufferedInputStream;
	import java.io.BufferedOutputStream;
	import java.io.ByteArrayInputStream;
	import java.io.ByteArrayOutputStream;
	import java.io.File;
	import java.io.FileInputStream;
	import java.io.FileNotFoundException;
	import java.io.FileOutputStream;
	import java.io.InputStream;
	import java.io.OutputStream;
	
	public class StreamGetter {
	
	 public static OutputStream getOutputStream(File file, boolean append) throws FileNotFoundException {
	 FileOutputStream stream = new FileOutputStream(file, append);
	 BufferedOutputStream stream2 = new BufferedOutputStream(stream);
	 return stream2;
	
	 }
	
	 public static OutputStream getOutputStream() {
	 ByteArrayOutputStream arrayOutputStream = new ByteArrayOutputStream();
	 BufferedOutputStream stream2 = new BufferedOutputStream(arrayOutputStream);
	 return stream2;
	
	 }
	
	 public static InputStream getInputStream(File file) throws FileNotFoundException {
	 FileInputStream fileInputStream =new FileInputStream(file);
	 BufferedInputStream inputStream = new BufferedInputStream(fileInputStream);
	 return inputStream;
	
	 }
	
	 public static InputStream getInputStream(byte[] bs) {
	 ByteArrayInputStream arrayInputStream = new ByteArrayInputStream(bs);
	 BufferedInputStream inputStream = new BufferedInputStream(arrayInputStream);
	 return inputStream;
	
	 }
	}

	

	package org.cookie.sreams;
	
	import java.io.IOException;
	import java.io.InputStream;
	import java.io.OutputStream;
	
	public class StreamChannle {
	
	 /**
	 * 数据传递，推送
	 * @param inputStream
	 * @param outputStream
	 * @throws IOException
	 */
	 public static void put(InputStream inputStream,OutputStream outputStream) throws IOException {
	
	 byte[] buffer = new byte[inputStream.available()];
	 while(inputStream.read(buffer)>0){
	 outputStream.write(buffer);
	 buffer = new byte[inputStream.available()];
	 }
	 }
	
	 /**
	 * 带统计功能的put
	 * @param inputStream
	 * @param outputStream
	 * @param listener 数据传递时的监听器
	 * @return
	 * @throws IOException
	 */
	 public static long put(InputStream inputStream,OutputStream outputStream,IDataCopyListener listener) throws IOException {
	
	 long rcount = 0 ;
	 int rbyte = inputStream.available();
	 byte[] buffer = new byte[rbyte];
	 while(inputStream.read(buffer)>0){
	 outputStream.write(buffer);
	 //累计
	 rcount+=rbyte;
	 listener.onDataCopy(rbyte, rcount);
	
	 rbyte = inputStream.available();
	 buffer = new byte[rbyte];
	 }
	
	 return rcount;
	 }
	
	 /**
	 * 数据传递时的监听器
	 * @author hacxlly
	 *
	 */
	 public static interface IDataCopyListener {
	
	 public void onDataCopy(int reading,long readCount);
	 }
	}
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　文件操作　　工具类　
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