急！！！帮忙写个有关I/O的小程序。

Question

咦用FileInputStream就可以达到你的要求呀!
byte[] b=new byte[10000000];//够用了
FileInputStream fis=new FileInputStream("xxx.jpg");
int len=fis.read(b);//读入内容,len为文件大小
好了现在b数组中从0到len的数据就是xxx.jpg的2进制数据

Answer 1

参考一下：
public byte[] getBlob(String tableName, String blobField, String strPK) throws Exception
{                //由于使用连接池时存取blob/clob有问题，这里使用ｊｄｂｃ连接
                byte byteImage[] = null;
                Connection newConn = DAO.connectJDBC();
                Statement stmt1 = null; stmt1=newConn.createStatement();
String tmpsqlstr="SELECT "+blobField+" FROM "+tableName+" WHERE "+strPK;
ResultSet tmprlt=stmt1.executeQuery(tmpsqlstr);
if(tmprlt.next()){
                  if(bOracle){
                      BLOB blob = ((OracleResultSet)tmprlt).getBLOB(blobField) ;
                      if( blob != null ){
                          InputStream is = blob.getBinaryStream();
                          //care is.available is undefined. should use blob.length();
                          int nCount = (int)blob.length();
                          byteImage = new byte[nCount];
                          is.read( byteImage );
                          is.close();
                      }
                    }
                    else if(bSQL){
                        InputStream is = tmprlt.getBinaryStream(blobField);
                          //care is.available is undefined. should use blob.length();
                          //int  nCount = (int)blob.length();
                          byteImage = new byte[is.available()];
                          //if(byteImage==)
                          is.read( byteImage );
                          is.close();
                        //byte[] btt=tmprlt.getBytes(blobField);
                        //byteImage=btt;
                        /*Blob blob=tmprlt.getBlob(blobField);
                        if( blob != null )
                        {
                                        InputStream is = blob.getBinaryStream();
                                        //care is.available is undefined. should use blob.length();
                                        int nCount = (int)blob.length();
                                        byteImage = new byte[nCount];
                                        is.read( byteImage );
                                        is.close();
                        }*/
}
}
                tmprlt.close();
                stmt1.close();
                newConn.close();
return byteImage;
}

Answer 2

to: Eraserpro(工作好难找啊!租房子好贵啊!...) 
可是我现在想要的是OBJECT型，用new Object(fis);好象不行啊？
谢谢在帮忙！

Answer 3

FileInputStream本身不就是Object的子类么，为什么还要转换？