本来是以做数据挖掘的目的进去哪网的，结构却成了系统开发。。。
不过还是比较认真的做了三个月，老师很认同我的工作态度和成果。。。
实习马上就要结束了，总结一下几点之前没有注意过的变成习惯和问题，分享给大家。
同时打个广告：去哪网内审部招JavaWeb开发实习生，时间非常自由，每周一天、周六周日甚至都可以，时间充裕的小伙伴给我留言啊，挣个零花钱，还能长点经验。。。。（保研的、想工作的大四狗最合适不过了。。。）
需哟的包（java操作excel包 jxl.jar）：http://download.csdn.net/detail/mmc2015/9009859
还是直接上代码，官方文档参考http://www.andykhan.com/jexcelapi/：
//(NOTE: when creating a spreadsheet from a ServletInputStream you must remove the HTTP header information before creating the Workbook object.) <html>
@SuppressWarnings("rawtypes")
public static void createExcel(TreeMap MonitorPointInstanceDetailsMap) throws WriteException, IOException{
String monitorPointName = MonitorPointInstanceDetailsMap.get("monitorPointName").toString();
//输出EXCEL
String nowDate = new SimpleDateFormat("yyyy-MM-dd").format(new Date());
String serverRealRootPath =<strong> GetServerRealPathUtil.getRootPath()</strong>;//参考前几篇博客
//System.out.println(serverRealRootPath);
String fileName = serverRealRootPath+File.separator+nowDate+".xlsx";
File file = new File(fileName);
OutputStream os = new FileOutputStream(file);
//创建工作薄
WritableWorkbook workbook = Workbook.createWorkbook(file);
//创建新的一页
WritableSheet sheet = workbook.createSheet("First Sheet", 0);
//创建要显示的内容,创建一个单元格，第一个参数为列坐标，第二个参数为行坐标，第三个参数为内容
//The other point to note is that the cell's location is specified as (column, row). Both are zero indexed integer values - A1 being represented by (0,0), B1 by (1,0), A2 by (0,1) and so on.
/*构造合并的表头*/
//添加合并单元格，第一个参数是起始列，第二个参数是起始行，第三个参数是终止列，第四个参数是终止行
sheet.mergeCells(0, 0, 6, 0);
//设置字体种类和黑体显示,字体为Arial,字号大小为15,采用黑体显示
WritableFont mergeTitleBold = new WritableFont(WritableFont.ARIAL, 15, WritableFont.BOLD);
//生成一个单元格样式控制对象
WritableCellFormat mergeTitleFormate = new WritableCellFormat(mergeTitleBold);
//单元格中的内容水平方向居中
mergeTitleFormate.setAlignment(jxl.format.Alignment.CENTRE);
//单元格的内容垂直方向居中
mergeTitleFormate.setVerticalAlignment(jxl.format.VerticalAlignment.CENTRE);
Label mergeTitle = new Label(0, 0, "表头表头。。。", mergeTitleFormate);
sheet.setRowView(0, 800, false);//设置行的高度
sheet.addCell(mergeTitle);
int currentRow = 1;
Iterator it=MonitorPointInstanceDetailsMap.entrySet().iterator();
while(it.hasNext()){
Map.Entry entry = (Map.Entry)it.next();
String processID = entry.getKey().toString();
if(processID.equals("monitorPointName")){
continue;
}
String value = entry.getValue().toString();
//System.out.println(processID+"---"+value);
String processName = value.split(";")[0];
if((value.split(";")).length!=5){
//该流程【在统计周期内】还没有对应的流程实例信息
continue;
}
String[] processInstance_Name = (value.split(";")[1]).split(",");
String[] processInstance_SenderName = (value.split(";")[2]).split(",");
String[] processInstance_CreateDate = (value.split(";")[3]).split(",");
String[] processInstance_StopNodeName = (value.split(";")[4]).split(",");
for(int i=0;i<processInstance_Name.length&&!processInstance_Name[i].equals("");i++){
if(i==0){//增加标题行
//设置字体种类和黑体显示,字体为Arial,字号大小为12,采用黑体显示
WritableFont titleBold = new WritableFont(WritableFont.ARIAL, 12, WritableFont.BOLD);
//生成一个单元格样式控制对象
WritableCellFormat titleFormate = new WritableCellFormat(titleBold);
//单元格中的内容水平方向居中
titleFormate.setAlignment(jxl.format.Alignment.CENTRE);
//单元格的内容垂直方向居中
titleFormate.setVerticalAlignment(jxl.format.VerticalAlignment.CENTRE);
sheet.setRowView(0, 600, false);//设置行的高度
Label title0 = new Label(0, currentRow, "ID", titleFormate);
Label title1 = new Label(1, currentRow, "流程名称", titleFormate);
Label title2 = new Label(2, currentRow, "流程实例名称", titleFormate);
Label title3 = new Label(3, currentRow, "实例发起人", titleFormate);
Label title4 = new Label(4, currentRow, "实例发起时间", titleFormate);
Label title5 = new Label(5, currentRow, "实例是否结束", titleFormate);
Label title6 = new Label(6, currentRow, "待处理的节点名称", titleFormate);
sheet.addCell(title0);
sheet.addCell(title1);
sheet.addCell(title2);
sheet.addCell(title3);
sheet.addCell(title4);
sheet.addCell(title5);
sheet.addCell(title6);
currentRow++;
}
//增加实例内容行
sheet.addCell(new Label(0, currentRow, Integer.toString(i+1)));
sheet.addCell(new Label(1, currentRow, processName));
sheet.addCell(new Label(2, currentRow, processInstance_Name[i]));
sheet.addCell(new Label(3, currentRow, processInstance_SenderName[i]));
sheet.addCell(new Label(4, currentRow, processInstance_CreateDate[i]));
sheet.addCell(new Label(5, currentRow, "未结束"));
sheet.addCell(new Label(6, currentRow, processInstance_StopNodeName[i]));
<span style="white-space:pre"> </span>currentRow++;
}
}
//把创建的内容写入到输出流中，并关闭输出流
workbook.write();
workbook.close();
os.close();
}版权声明：本文为博主原创文章，未经博主允许不得转载。
去哪网实习总结：java读写excel表格（JavaWeb）
原文地址：http://blog.csdn.net/mmc2015/article/details/47685763
