java导出excel 要有选择路径，保存信息是库查询出的数据

Posted 2023-05-13

java导出Excel

java 代码 /* * Generated by MyEclipse Struts * Template path: templates/java/JavaClass.vtl */ package com.axon.fable.sams.view.action; import java.io.IOException; import java.io.OutputStream; import java.util.List; import javax.serv ...

java导出Excel例举方式
方法一：导出Excel数据的插件jexcelapi

程序实例如下：
public void exportClassroom(OutputStream os) throws PaikeException

try
WritableWorkbook wbook = Workbook.createWorkbook(os); //建立excel文件
WritableSheet wsheet = wbook.createSheet("教室信息表", 0); //工作表名称
//设置Excel字体
WritableFont wfont = new WritableFont(WritableFont.ARIAL, 16,
WritableFont.BOLD, false,
jxl.format.UnderlineStyle.NO_UNDERLINE,
jxl.format.Colour.BLACK);
WritableCellFormat titleFormat = new WritableCellFormat(wfont);
String[] title = "教室名", "容 量", "类 型", "其他说明" ;
//设置Excel表头
for (int i = 0; i < title.length; i++)
Label excelTitle = new Label(i, 0, title[i], titleFormat);
wsheet.addCell(excelTitle);

int c = 1; //用于循环时Excel的行号
ClassroomService cs = new ClassroomService();
List list = cs.findAllClassroom(); //这个是从数据库中取得要导出的数据
Iterator it = list.iterator();
while (it.hasNext())
ClassroomDTO crdto = (ClassroomDTO) it.next();
Label content1 = new Label(0, c, crdto.getRoomname());
Label content2 = new Label(1, c, crdto.getCapicity().toString());
Label content3 = new Label(2, c, crdto.getRoomTypeId()
.toString());
Label content4 = new Label(3, c, crdto.getRemark());
wsheet.addCell(content1);
wsheet.addCell(content2);
wsheet.addCell(content3);
wsheet.addCell(content4);
c++;


wbook.write(); //写入文件
wbook.close();
os.close();
catch (Exception e)

throw new PaikeException("导出文件出错");





方法二：直接用Java代码实现导出Excel报表

/*

* Generated by MyEclipse Struts

* Template path: templates/java/JavaClass.vtl

*/

package com.axon.fable.sams.view.action;

import java.io.IOException;

import java.io.OutputStream;

import java.util.List;

import javax.servlet.http.HttpServletRequest;

import javax.servlet.http.HttpServletResponse;

import jxl.Workbook;

import jxl.write.WriteException;

import jxl.write.biff.RowsExceededException;

import org.apache.struts.action.ActionForm;

import org.apache.struts.action.ActionForward;

import org.apache.struts.action.ActionMapping;

import org.hibernate.HibernateException;

import org.hibernate.Query;

import org.hibernate.Session;

import org.hibernate.Transaction;

import com.axon.fable.empolderpackage.out.Outjavascript;

import com.axon.fable.empolderpackage.page.Pager;

import com.axon.fable.empolderpackage.string.MyPublic;

import com.axon.fable.sams.common.BaseAction;

import com.axon.fable.sams.exception.AppBusinessException;

import com.axon.fable.sams.exception.AppSystemException;

/**

* MyEclipse Struts

* Creation date: 06-28-2007

*

* XDoclet definition:

* @struts.action path="/axon" name="axonForm" input="/samspage/zm/axon.jsp" parameter="method" scope="request" validate="true"

* @struts.action-forward name="success" path="/samspage/zm/content.jsp"

*/

public class StshipoperationAction extends BaseAction

/*

* Generated Methods

*/

private static Session session=null;

private static Transaction ts=null;

private static Query queryC=null;

private static Query queryR=null;

private static Query query=null;

private static List list=null;

private static Integer startRow;

private static Integer ncurrentPage;

private static Integer cell;

private static String property;

private static String sql;

private static String type;

private static String condition ;//是否导出当前页

private static String currentPage;

private static String from ;

private static String pactdata;

private static String voyagename;

private static String voyageno;

private static String dwt ;

private static String hirefrom ;

private static String deliveryposion ;

private static String redeliveryposion ;

private static String sheepowner ;

private static String addr;

private static String addcomm;

private static String rent;

private static String fileName ;

private static OutputStream os;

@Override

public ActionForward findAll(ActionMapping mapping, ActionForm form, HttpServletRequest request, HttpServletResponse response)

// TODO Auto-generated method stub

return null;



@Override

public ActionForward findById(ActionMapping mapping, ActionForm form, HttpServletRequest request, HttpServletResponse response)

// TODO Auto-generated method stub

return null;



@Override

public ActionForward save(ActionMapping mapping, ActionForm form, HttpServletRequest request, HttpServletResponse response)

// TODO Auto-generated method stub

return null;



public static String strNull(Object nullStr,String newStr,Integer cell)

if(nullStr==null||nullStr.equals(""))return newStr;elsecell+=1;return nullStr+"";



public static String getStr(String str,Integer cell)

if(str==null||str.trim().equals(""))return "";elsecell+=1;return ","+str;



public static String getExcelTile(String title)

if(title==null)

return "";

if(title.equals("modela.stsid"))

return "编号";

if(title.equals("modelc.pactdata"))

return "合同日期";

if(title.equals("modela.voyagename"))

return "航名";

if(title.equals("modela.voyageno"))

return "航次";

if(title.equals("modelc.dwt"))

return "DWT";

if(title.equals("modelc.hirefrom"))

return "受载期";

if(title.equals("modela.deliveryposion"))

return "交船地点";

if(title.equals("modela.redeliveryposion"))

return "还船地点";

if(title.equals("modelc.sheepowner"))

return "联系人";

if(title.equals("modelc.addr"))

return "经纪人拥金";

if(title.equals("modelc.addcomm"))

return "ADD COMM";

if(title.equals("modelc.rent"))

return "租金";

return "";



public ActionForward exporVoyagesInfoToExcel(ActionMapping mapping, ActionForm form,

HttpServletRequest request, HttpServletResponse response)

list=null;

startRow=0;

ncurrentPage=1;

cell=0;

type =request.getParameter("type");

condition =request.getParameter("condition");//是否导出当前页

currentPage =request.getParameter("currentPage");

from =request.getParameter("from");

pactdata = request.getParameter("modelc.pactdata");

voyagename = request.getParameter("modela.voyagename");

voyageno = request.getParameter("modela.voyageno");

dwt = request.getParameter("modelc.dwt");

hirefrom = request.getParameter("modelc.hirefrom");

deliveryposion = request.getParameter("modela.deliveryposion");

redeliveryposion = request.getParameter("modela.redeliveryposion");

sheepowner = request.getParameter("modelc.sheepowner");

addr = request.getParameter("modelc.addr");

addcomm = request.getParameter("modelc.addcomm");

rent = request.getParameter("modelc.rent");

if(type!=null&&type.trim().equals("1"))

type ="已还船舶--费用未结清";

else

type ="已还船舶--费用已结清";



property =getStr(pactdata,cell)+getStr(voyagename,cell)+getStr(voyageno,cell)+getStr(dwt,cell)+getStr(hirefrom,cell)

+getStr(deliveryposion,cell)+getStr(redeliveryposion,cell)+getStr(sheepowner,cell)+getStr(addr,cell)+getStr(addcomm,cell)

+getStr(rent,cell);

property = property.substring(1);

String split[] = property.split(",");

// System.out.println("-----------------------------property:"+property);

if(currentPage!=null&&!currentPage.trim().equals(""))

ncurrentPage =Integer.parseInt(currentPage);

else

OutJavaScript.outString(response, "Sorry! Failed to get information of pager.");

return null;



try

session =getServiceLocator().getBaseHibernateDAO().getSession();

sql ="select count(*) "+from;

query =session.createQuery(sql);

list = query.list();

for (int i = 0; i < list.size(); i++)

totalSize =(Integer)list.get(i);

if(totalSize!=0)

pager =new Pager(ncurrentPage,totalSize);





query =getServiceLocator().getBaseHibernateDAO().getSession().createQuery("select " +property+from);

if(condition!=null&&condition.trim().equals("1"))//分页数据

startRow = (ncurrentPage - 1)*pager.getPageSize();

query.setFirstResult(startRow);

query.setMaxResults(pager.getPageSize());

// System.out.println("---------------------------------------------------query:"+query);



list = query.list();

fileName = "shipInfo";

os = response.getOutputStream();

response.reset();

response.setHeader("Content-disposition",

"attachment; filename=" +fileName + ".xls");

response.setContentType("application/msexcel");

jxl.write.WritableWorkbook wbook = Workbook.createWorkbook(os);

jxl.write.WritableSheet wsheet = wbook.createSheet("the first sheet", 0);

for (int i = 0; i < split.length; i++)

jxl.write.Label wlabel0;

wlabel0 = new jxl.write.Label(i, 0, getExcelTile(split[i]));

wsheet.addCell(wlabel0);



jxl.write.Label wlabel1;

for(int i=0;i<list.size();i++)

if(split.length==1)

Object strval = (Object) list.get(i);

String javaScript=""+MyPublic.tohtmlStr(strval==null?"":strval.toString().trim())+"";

wlabel1 = new jxl.write.Label(0, i+1,strval==null?"":strval.toString().trim() );

wsheet.addCell(wlabel1);

else

Object[] strval = (Object[]) list.get(i);

for(int j=0;j<strval.length;j++)

String javaScript=""+MyPublic.toHtmlStr(strval[j]==null?"":strval[j].toString().trim())+"";

//System.out.println("===================script:"+javaScript);

wlabel1 = new jxl.write.Label(j, i+1,strval[j]==null?"":strval[j].toString().trim() );

wsheet.addCell(wlabel1);







wbook.write();

response.flushBuffer();

wbook.close();

os.close();

catch (IOException e)

// TODO Auto-generated catch block

OutJavaScript.outString(response, "Sorry! Export Excel exception.");

e.printStackTrace();

catch (HibernateException e1)

// TODO Auto-generated catch block

OutJavaScript.outString(response, "Sorry! Database exception.");

e1.printStackTrace();

catch (AppSystemException e1)

// TODO Auto-generated catch block

OutJavaScript.outString(response, "Sorry! System exception.");

e1.printStackTrace();

catch (AppBusinessException e1)

// TODO Auto-generated catch block

OutJavaScript.outString(response, "Sorry! Database exception.");

e1.printStackTrace();

catch (RowsExceededException e)

// TODO Auto-generated catch block

OutJavaScript.outString(response, "Sorry! Export Excel exception.");

e.printStackTrace();

catch (WriteException e)

// TODO Auto-generated catch block

OutJavaScript.outString(response, "Sorry! Export Excel exception.");

e.printStackTrace();



return null;



@Override

public ActionForward update(ActionMapping mapping, ActionForm form, HttpServletRequest request, HttpServletResponse response)

// TODO Auto-generated method stub

return null;





还有其他很多种 字数限制 无法一一举例方式 参考技术A 那要看你是做bs的还是cs的了，工具最好使的还是jxl

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