封装了I25,CODE39,CODE128,EAN_UPC四个条码的编码类，演示了这四种条码是如何编码，并产生条码图像显示出来的。绝对原创。条码技术最底层技术资料。-Encapsulates the I25, CODE39, CODE128, EAN_UPC four bar coding class, demonstrates how the four bar code, and generate the bar code image displayed. Absolutely origina