JAva入出力ストリーム

/**
 *
 */
package com.XXX.stream;

import java.io.BufferedInputStream;
import java.io.BufferedReader;
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.Writer;

import org.apache.hadoop.io.ArrayFile.Reader;

/**
 * @author 
 *                        ，
 *                ，              ，
 *      ，         。
 */
public class StringByteStream {

    private static String mFilePath;

    /**
     * @param args
     */
    public static void main(String[] args) {
        // TODO Auto-generated method stub
        initialize();
//        OutPutStream();
//        InPutStream();
//        FileWriter();
//        FileReader();
        FileOutputStream();
//        FileInputStream();
//        ByteToStringInNoBuff();
//        ByteToStringInByBuff();
    }

    /**
     *     InputStreamReader     ，      
     * */
    private static void FileInputStream() {
        // TODO Auto-generated method stub
        File mFile = new File(mFilePath);
        StringBuilder mBuilder = new StringBuilder();
        try {
            FileInputStream mFInputStream = new FileInputStream(mFile);
            InputStreamReader mInputStreamReader = new InputStreamReader(mFInputStream);
            BufferedReader mReader = new BufferedReader(mInputStreamReader);
            String str = null;
            while ((str = mReader.readLine()) != null) {
                mBuilder.append(str);
            }
            mFInputStream.close();
            mInputStreamReader.close();
//            byte[] b = new byte[2048];
//            int len = mFInputStream.read();
//            mFInputStream.read(b, 0, len);
//            String str = new String(b);
//            mFInputStream.close();
            System.out.println("mBuilder = " + mBuilder);
        } catch (Exception e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
        }
    }

    /**
     * FileOutputStream       ，             
     * */
    private static void FileOutputStream() {
        // TODO Auto-generated method stub
        File mFile = new File(mFilePath);
        try {
            FileOutputStream mFileOutputStream = new FileOutputStream(mFile);
            String str = "       ";
            byte [] b = new byte[2048];
            b = str.getBytes();
            mFileOutputStream.flush();
            mFileOutputStream.write(b);
            mFileOutputStream.close();
        } catch (Exception e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
        }
    }

    /**
     *            ，     
     * */
    private static void ByteToStringInByBuff() {
        // TODO Auto-generated method stub
        File mFile = new File(mFilePath);
        try {
            InputStream mInputStream = new FileInputStream(mFile);
            InputStreamReader mInputStreamReader = new InputStreamReader(mInputStream);
            BufferedReader mBufferedReader = new BufferedReader(mInputStreamReader);
            String outputByBuffer = null;
//            outputByBuffer = mBufferedReader.read();  int
            while ((outputByBuffer = mBufferedReader.readLine()) != null) {
                System.out.println("                   = " + outputByBuffer);

            }
            mInputStreamReader.close();
        } catch (Exception e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
        }


    }

    /**
     *            ，    ,         
     * */
    private static void ByteToStringInNoBuff() {
        // TODO Auto-generated method stub
        File mFile = new File(mFilePath);
        try {
            InputStream mInputStream = new FileInputStream(mFile);
            InputStreamReader mInputStreamReader = new InputStreamReader(mInputStream);
            char [] cha = new char [1024];
            int length = mInputStreamReader.read(cha);
            String srt = new String(cha);
            mInputStreamReader.close();
            System.out.println("                  = " + srt);
        } catch (Exception e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
        }


    }

    /**
     *      
     * */
    private static void OutPutStream() {
        // TODO Auto-generated method stub
        File mFile = new File(mFilePath);//1.  file     
        OutputStream mOutputStream = null;
        try {//2.          
            mOutputStream = new FileOutputStream(mFile, false);//false             
            String str = "       ";
            byte b[] = str.getBytes();//3.           
            mOutputStream.flush();
            mOutputStream.write(b);//4.     
            mOutputStream.close();//5.     
        } catch (Exception e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
        }
    }

    /**
     *      *
     * */
    private static void InPutStream() {
        // TODO Auto-generated method stub
        File mFile = new File(mFilePath);
        InputStream mInputStream = null;
        try {
            mInputStream = new FileInputStream(mFile);
            byte[] cha = new byte[1024];
            int length = mInputStream.read(cha);
            mInputStream.read(cha, 0, length);
            String str = new String(cha);
            mInputStream.close();
            System.out.println("str = " + str);
        } catch (Exception e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
        }

    }

    /**
     *      ，      ，                  
     * FileWriter       
     * */
    private static void FileWriter() {
        // TODO Auto-generated method stub
        File mFile = new File(mFilePath);
        FileWriter mFileWriter = null;
        try {//        ，         
            mFileWriter = new FileWriter(mFile, false);
            String str = "       ";
            mFileWriter.write(str);
            mFileWriter.flush();//  
            mFileWriter.close();
        } catch (IOException e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
        }

    }


    /**
     *      
     * */
    private static void FileReader() {
        // TODO Auto-generated method stub

        File mFile = new File(mFilePath);
        try {
            FileReader mFileReader = new FileReader(mFile);
            char [] cha = new char[1024];
            int length = mFileReader.read(cha);
            mFileReader.read(cha, 0, length);
            String str = new String(cha);
            mFileReader.close();
            System.out.println("str = " + str);

        } catch (Exception e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
        }


    }


    private static void initialize() {
        // TODO Auto-generated method stub
        mFilePath = "D:\\usersDate\\testStream.txt";
    }
}