io流对数据的读写

import java.io.FileNotFoundException;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.InputStreamReader;
import java.io.OutputStreamWriter;
import java.io.UnsupportedEncodingException;

public class Iotetst {

    private String fileName="ioTest.txt";
    private String basePath="D:/TestFile";
    private String writeFileName="write.txt";
    private String charset="gbk";

    public static void main(String[] args) {
        Iotetst iotest = new Iotetst();
        //测试InputStreamReader
        //iotest.readFile();

        //测试BufferedReader
//        iotest.buff();

        //测试写OutputStreamWrite
//        iotest.writeFile();

//        测试BufferedWriter
        iotest.buffw();
    }

    /**
     * read
     */
    public void readFile(){
        String AllPath=basePath+File.separatorChar+fileName;
        System.out.println(AllPath);
        try {
            //读取字节转换成字符
            FileInputStream fileInputStream = new FileInputStream(new File(AllPath));
            InputStreamReader streamReader = new InputStreamReader(fileInputStream,charset);

            //
            StringBuffer sb=new StringBuffer();
            char[] buff=new char[1024];
            int count=0;

            try {
                while((count=streamReader.read(buff))!=-1){

                    sb.append(buff,0,count);
                }
            } catch (IOException e) {
                // TODO Auto-generated catch block
                e.printStackTrace();
            }finally{
                try {
                    System.out.println(buff);
                    streamReader.close();

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

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

    //BufferedReader

    @SuppressWarnings("resource")
    public void buff(){

        String AllPath=basePath+File.separatorChar+fileName;
        try {
        FileInputStream inputStream = new FileInputStream(new File(AllPath));

        BufferedReader bufferedReader= new BufferedReader(new InputStreamReader(inputStream, charset));

        String sb ;

        while((sb=bufferedReader.readLine())!=null){

            System.out.println(sb);
        }

        } catch (UnsupportedEncodingException e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
        }catch (FileNotFoundException e1) {
            // TODO Auto-generated catch block
            e1.printStackTrace();
        } catch (IOException e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
        }
    }

    /**
     * write
     */
    public void writeFile(){
        String writeToPath=basePath+File.separatorChar+writeFileName;
        try {

            FileOutputStream fileOutputStream = new FileOutputStream(new File(writeToPath));

            OutputStreamWriter outputStreamWriter = new OutputStreamWriter(fileOutputStream,charset);

            outputStreamWriter.write("i love you and i wait for you and i miss you ! where are you?");
            outputStreamWriter.close();
        } catch (FileNotFoundException e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
        } catch (UnsupportedEncodingException e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
        } catch (IOException e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
        }
    }

    public void buffw(){
        String writeToPath=basePath+File.separatorChar+writeFileName;
        try{
        FileOutputStream fileOutputStream = new FileOutputStream(new File(writeToPath));

        OutputStreamWriter outputStreamWriter = new OutputStreamWriter(fileOutputStream);

        BufferedWriter bufferedWriter = new BufferedWriter(outputStreamWriter);

        bufferedWriter.write("中式敌众我寡实打实大啊啊奥术大师阿斯达奥术大师阿斯达");
        bufferedWriter.close();
        }catch(Exception e){
            e.printStackTrace();
        }
    }

}