74ls112功能表及参数

 74LS112双J-K触发器的逻辑符号和J-K触发器引脚功能分别如图3、1,图3、2所示。

    引脚功能描述:

    CLK1,CLK2: 时钟输入端(下降沿有效)

    J1,J2,K1,K2: 数据输入端

    Q1,Q2,/Q1,/Q2: 输出端

CLR1,CLR2: 直接复位端(低电平有效)

PR1,PR2: 直接置位端(低电平有效)

�(Hgoodsaction.java~80~15396 1168830970�=package com.webtier; import org.apache.struts.action.ActionMapping; import org.apache.struts.action.ActionForm; import javax.servlet.http.HttpServletRequest; import javax.servlet.http.HttpServletResponse; import org.apache.struts.action.ActionForward; import com.domain.GoodsForm; import org.apache.struts.action.Action; import com.dao.GoodsDao; import java.util.List; import com.dao.SmallTypeDao; import com.tool.Chinese; import javax.servlet.http.HttpSession; import java.io.UnsupportedEncodingException; //商品的Action public class GoodsAction extends Action { private int action; private GoodsDao dao = null; private SmallTypeDao small = null; private HttpSession session = null; public ActionForward execute(ActionMapping mapping, ActionForm form, HttpServletRequest request, HttpServletResponse response) throws UnsupportedEncodingException { request.setCharacterEncoding("gb2312"); this.dao = new GoodsDao(); small = new SmallTypeDao(); action = Integer.parseInt(request.getParameter("action")); session = request.getSession(); switch (action) { case 0: { return goodSelect(mapping, form, request, response); //全部查询小类别信息 } case 1: { return goodForward(mapping, form, request, response); //转向页面 } case 2: { return selectSmallName(mapping, form, request, response); //查询小类别的名称 } case 3: { return saveGoods(mapping, form, request, response); //把从页面中信�>