Java读写二进制文件

 

 import java.io.DataInputStream;import java.io.DataOutputStream;import java.io.File;import java.io.FileInputStream;import java.io.FileOutputStream;import java.io.IOException;/* @comany 阿斯达克(深圳)信息技术有限公司* @author steven.wu* @since 2009.8.11* @description read and write stream for binary file。*/public class BinaryReadWrite {private DataInputStream dis=null;private DataOutputStream dos=null;private String s_FilePath="d:/bin.dat";private byte[] m_datapadding = { 0x00 }; //填充空白，以补足字节位数.public BinaryReadWrite() {// TODO Auto-generated constructor stubinit();}private void init(){try{if(!new File(s_FilePath).exists()){new File(s_FilePath).createNewFile();}dis=new DataInputStream(new FileInputStream(new File(s_FilePath)));dos=new DataOutputStream(new FileOutputStream(new File(s_FilePath)));}catch(Exception e){e.printStackTrace();}}public void writeBinaryStream(){try{if(dos!=null){for(int i=0;i<2;i++){//write boolean value.dos.writeBoolean(true);//write a char value.char c='a';dos.writeChar((int)c);Double d=12.567d;dos.writeDouble(d);Float f=56.782f;dos.writeFloat(f);int k=105;dos.writeInt(k);long l=98765l;dos.writeLong(l);short st=12;dos.writeShort(st);String cs="Java读写二进制文件";String cs1="二进制文件";if(i==0){dos.writeUTF(cs);}else{dos.writeUTF(cs1);}dos.write(m_datapadding);}dos.flush();dos.close();}}catch(Exception e){e.printStackTrace();}}public void readBinaryStream(){try{if(dis!=null){while(dis.available()>0){System.out.println(dis.available());System.out.println(dis.readBoolean());char c=(char)dis.readChar();System.out.println(c);System.out.println(dis.readDouble());System.out.println(dis.readFloat());System.out.println(dis.readInt());System.out.println(dis.readLong());System.out.println(dis.readShort());System.out.println(dis.readUTF());System.out.println(dis.read(m_datapadding));}}}catch(Exception e){e.printStackTrace();}}public static void main(String[] args) throws IOException {BinaryReadWrite bin=new BinaryReadWrite();bin.writeBinaryStream();bin.readBinaryStream();}}