一个简单而不简约的学生信息管理系统

/** * author: Java Team * date: 2008-10-30 */ package cn.kfu.util; import cn.kfu.pojo.CommonListVO; public class Page { // 对参数vo对象执行分页操作，计算出相关的属性值及描述信息 public void execute(CommonListVO vo) { // 获得vo中数据 int start = vo.getStart(); int range = vo.getRange(); int count = vo.getCount(); // 计算当前页号 int currentPage = (range == 1) ? start : start / range + 1; vo.setCurrentPage(currentPage); // 计算总页数 int totalPage = (count % range == 0) ? count / range : count / range+ 1; vo.setTotalPage(totalPage); // 计算每页信息 if (start > count) { vo.setPageCount(0); vo.setPageEnd(0); vo.setPageStart(0); } else { vo.setPageStart(start); if ((count - start) >= range) { vo.setPageEnd(start + range - 1); } else { vo.setPageEnd(count); } vo.setPageCount(vo.getPageEnd() - start + 1); } StringBuilder contentSB = new StringBuilder(100); contentSB.append("每页"); contentSB.append(range); contentSB.append("条。"); contentSB.append("查询结果：总计"); contentSB.append(vo.getTotalPage()); contentSB.append("页/"); contentSB.append(count); contentSB.append("条，当前第"); contentSB.append(vo.getCurrentPage()); contentSB.append("页/计"); contentSB.append(vo.getPageCount()); contentSB.append("条，记录号["); contentSB.append(vo.getPageStart()); contentSB.append("-"); contentSB.append(vo.getPageEnd()); contentSB.append("]"); vo.setContentMessage(contentSB.toString()); StringBuilder linkSB = new StringBuilder(100); linkSB.append("<script language=\"javascript\">\n"); linkSB.append(" function doLinkSubmitForm(start,range){\n"); linkSB.append(" document.linkSubmitForm.start.value = start;\n"); linkSB.append(" document.linkSubmitForm.range.value = range;\n"); linkSB.append(" document.linkSubmitForm.submit();\n"); linkSB.append(""); linkSB.append(" }\n"); linkSB.append("</script>\n"); linkSB.append("<form name=\"linkSubmitForm\" method=\"get\">\n"); linkSB.append(" <input type=\"hidden\" name=\"start\" value=\"\">\n"); linkSB.append(" <input type=\"hidden\" name=\"range\" value=\"\">\n"); linkSB.append(" <input type=\"hidden\" name=\"stID\" value=\"2007011002100\">\n"); linkSB.append("</form>\n"); if (currentPage == 1) { linkSB.append("首页&nbsp;|&nbsp;上一页&nbsp;|&nbsp;"); } else { linkSB.append("<a href=\"javascript:doLinkSubmitForm(1,").append( range).append(");\">"); linkSB.append(""); linkSB.append(""); linkSB.append("首页</a>&nbsp;|&nbsp;"); linkSB.append("<a href=\"javascript:doLinkSubmitForm("); linkSB.append((currentPage - 2) * range + 1); linkSB.append(","); linkSB.append(range); linkSB.append(");\">"); linkSB.append("上一页</a>&nbsp;|&nbsp;"); } if (currentPage == totalPage) { linkSB.append("下一页&nbsp;|&nbsp;尾页"); } else { linkSB.append("<a href=\"javascript:doLinkSubmitForm("); linkSB.append(currentPage * range + 1); linkSB.append(","); linkSB.append(range); linkSB.append(");\">"); linkSB.append("下一页</a>&nbsp;|&nbsp;"); linkSB.append("<a href=\"javascript:doLinkSubmitForm("); linkSB.append((totalPage - 1) * range + 1); linkSB.append(","); linkSB.append(range); linkSB.append(");\">"); linkSB.append("尾页</a>"); } linkSB.append("&nbsp;转到\n"); linkSB.append("<select onchange=\"doLinkSubmitForm((this.value-1)*"); linkSB.append(range).append("+1,").append(range).append(");\">\n"); for(int i=1; i<=totalPage; i++){ linkSB.append("<option value=\"").append(i).append("\""); if(currentPage == i){ linkSB.append(" selected"); } linkSB.append(">\n"); linkSB.append(i); linkSB.append("</option>"); } linkSB.append("\n"); linkSB.append("\n"); linkSB.append("\n"); linkSB.append("\n"); linkSB.append("\n"); linkSB.append("\n"); linkSB.append("</select>\n"); vo.setLinkMessage(linkSB.toString()); } }