java读写二进制文件

package com.geoway.pad.common;

import java.io.DataInput;
import java.io.DataOutput;
import java.io.IOException;

public interface Writerable {
	   //write 
       public void  write(DataOutput data) throws IOException;
       //read
       public  void read(DataInput di) throws IOException;
}
package com.geoway.pad.comm