JAVA进行基础的文件IO读写

import java.io.File;
import java.io.FileInputStream;
import java.io.FileNotFoundException;
import java.io.FileOutputStream;
import java.io.IOException;

public class TestIO {
    
    public void testRead(String path){
        FileInputStream is = null;
        File file = new File(path);
        try {
            is = new FileInputStream(file);
            byte[] byteBuffer = new byte[is.available()];
            int read = 0;
            while((read = is.read(byteBuffer))!= -1){
                System.out.write(byteBuffer, 0, read);
            }
        } catch (FileNotFoundException e) {
            e.printStackTrace();
        } catch (IOException e) {
            e.printStackTrace();
        }finally{
            try {
                if(is!=null){
                    is.close();
                }
            } catch (IOException e) {
                e.printStackTrace();
            }
        }
    }
    
    public void testWrite(String content, String path){
        File file = new File(path);
        try {
            FileOutputStream os = new FileOutputStream(file);
            byte[] byteBuffer = content.getBytes();
            os.write(byteBuffer, 0, byteBuffer.length);
            os.flush();
            os.close();
        } catch (FileNotFoundException e) {
            e.printStackTrace();
        } catch (IOException e) {
            e.printStackTrace();
        }
    }
    
    public static void main(String[] args) {
        TestIO io = new TestIO();
        io.testRead("src/test.txt");
        io.testWrite("this is a test", "src/test.txt");
        //io.testRead("src/test.txt");
    }
    
}

import java.io.File;import java.io.FileInputStream;import java.io.FileNotFoundException;import java.io.FileOutputStream;import java.io.IOException;
public class TestIO {public void testRead(String path){FileInputStream is = null;File file = new File(path);try {is = new FileInputStream(file);byte[] byteBuffer = new byte[is.available()];int read = 0;while((read = is.read(byteBuffer))!= -1){System.out.write(byteBuffer, 0, read);}} catch (FileNotFoundException e) {e.printStackTrace();} catch (IOException e) {e.printStackTrace();}finally{try {if(is!=null){is.close();}} catch (IOException e) {e.printStackTrace();}}}public void testWrite(String content, String path){File file = new File(path);try {FileOutputStream os = new FileOutputStream(file);byte[] byteBuffer = content.getBytes();os.write(byteBuffer, 0, byteBuffer.length);os.flush();os.close();} catch (FileNotFoundException e) {e.printStackTrace();} catch (IOException e) {e.printStackTrace();}}public static void main(String[] args) {TestIO io = new TestIO();io.testRead("src/test.txt");io.testWrite("this is a test", "src/test.txt");//io.testRead("src/test.txt");}}