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返回目录：excel表格制作
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;}else{cell+=1;return nullStr+"";}
}
public static String getStr(String str,Integer cell){
if(str==null||str.trim().equals("")){return "";}else{cell+=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7a64e59b9ee7ad94363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
import java.io.FileOutputStream;
import java.text.SimpleDateFormat;
import java.util.ArrayList;
import java.util.List;
import org.apache.poi.hssf.usermodel.HSSFCell;
import org.apache.poi.hssf.usermodel.HSSFCellStyle;
import org.apache.poi.hssf.usermodel.HSSFRow;
import org.apache.poi.hssf.usermodel.HSSFSheet;
import org.apache.poi.hssf.usermodel.HSSFWorkbook;
public class CreateSimpleExcelToDisk
{
/**
* @功能：手工构建一个简单格式的Excel
*/
private static List<Student> getStudent() throws Exception
{
List list = new ArrayList();
SimpleDateFormat df = new SimpleDateFormat("yyyy-mm-dd");
Student user1 = new Student(1, "张三", 16, df.parse("1997-03-12"));
Student user2 = new Student(2, "李四", 17, df.parse("1996-08-12"));
Student user3 = new Student(3, "王五", 26, df.parse("1985-11-12"));
list.add(user1);
list.add(user2);
list.add(user3);
return list;
}
public static void main(String[] args) throws Exception
{
// 第一步，创建一个webbook，对应一个Excel文件
HSSFWorkbook wb = new HSSFWorkbook();
// 第二步，在webbook中添加一个sheet,对应Excel文件中的sheet
HSSFSheet sheet = wb.createSheet("学生表一");
// 第三步，在sheet中添加表头第0行,注意老版本poi对Excel的行数列数有限制short
HSSFRow row = sheet.createRow((int) 0);
// 第四步，创建单元格，并7a64e4b893e5b19e364设置值表头 设置表头居中
HSSFCellStyle style = wb.createCellStyle();
style.setAlignment(HSSFCellStyle.ALIGN_CENTER); // 创建一个居中格式
HSSFCell cell = row.createCell((short) 0);
cell.setCellValue("学号");
cell.setCellStyle(style);
cell = row.createCell((short) 1);
cell.setCellValue("姓名");
cell.setCellStyle(style);
cell = row.createCell((short) 2);
cell.setCellValue("年龄");
cell.setCellStyle(style);
cell = row.createCell((short) 3);
cell.setCellValue("生日");
cell.setCellStyle(style);
// 第五步，写入实体数据 实际应用中这些数据从数据库得到，
List list = CreateSimpleExcelToDisk.getStudent();
for (int i = 0; i < list.size(); i++)
{
row = sheet.createRow((int) i + 1);
Student stu = (Student) list.get(i);
// 第四步，创建单元格，并设置值
row.createCell((short) 0).setCellValue((double) stu.getId());
row.createCell((short) 1).setCellValue(stu.getName());
row.createCell((short) 2).setCellValue((double) stu.getAge());
cell = row.createCell((short) 3);
cell.setCellValue(new SimpleDateFormat("yyyy-mm-dd").format(stu
.getBirth()));
}
// 第六步，将文件存到指定位置
try
{
FileOutputStream fout = new FileOutputStream("E:/students.xls");
wb.write(fout);
fout.close();
}
catch (Exception e)
{
e.printStackTrace();
}
}
}
第二段：POI中Excel文件Cell的类型
在读取每一个Cell的值的时候，通过getCellType方法获得当前Cell的类型，在Excel中Cell有6种类型，如下面所示。
Cell的类型
CellType
说明
CELL_TYPE_BLANK
空值
CELL_TYPE_BOOLEAN
布尔型
CELL_TYPE_ERROR
错误
CELL_TYPE_FORMULA
公式型
CELL_TYPE_STRING
字符串型
CELL_TYPE_NUMERIC
数值型
一般都采用CELL_TYPE_STRING和CELL_TYPE_NUMERIC类型，因为在Excel文件中只有字符串和数字。如果Cell的Type为CELL_TYPE_NUMERIC时，还需要进一步判断该Cell的数据格式，因为它7a64e4b893e5b19e366有可能是Date类型，在Excel中的Date类型也是以Double类型的数字存储的。Excel中的Date表示当前时间与1900年1月1日相隔的天数，所以需要调用HSSFDateUtil的isCellDateFormatted方法，判断该Cell的数据格式是否是Excel Date类型。如果是，则调用getDateCellValue方法，返回一个Java类型的Date。
/**
* @author liuwu
* Excel的导入与导出
*/
@SuppressWarnings({ "unchecked" })
public class ExcelOperate {
/**
* @author liuwu
* 这是一个通用的方法，利用了JAVA的反射机制,
* 可以将放置在JAVA集合中并且符合一定条件的数据以EXCEL的形式输出到指定IO设备上
* @param title 表格标题名
* @param headers 表格属性列名数组
* @param dataset 需要显示的数据集合,集合中一定要放置符合javabean风格的类的对象。
* 7a686964616fe59b9ee7ad94362此方法支持的 javabean属性【数据类型有java基本数据类型及String,Date,byte[](图片转成字节码)】
* @param out 与输出设备关联的流对象，可以将EXCEL文档导出到本地文件或者网络中
* @param pattern 如果有时间数据，设定输出格式。默认为"yyy-MM-dd"
* @throws IOException
*/
public static void exportExcel(String title, String[] headers,Collection<?> dataset, OutputStream out, String pattern) throws IOException {
// 声明一个工作薄
HSSFWorkbook workbook = new HSSFWorkbook();
// 生成一个表格
HSSFSheet sheet = workbook.createSheet(title);
// 设置表格默认列宽度为15个字节
sheet.setDefaultColumnWidth((short) 20);
// 生成一个样式
HSSFCellStyle style = workbook.createCellStyle();
// 设置这些样式
style.setFillForegroundColor(HSSFColor.SKY_BLUE.index);
style.setFillPattern(HSSFCellStyle.SOLID_FOREGROUND);
style.setBorderBottom(HSSFCellStyle.BORDER_THIN);
style.setBorderLeft(HSSFCellStyle.BORDER_THIN);
style.setBorderRight(HSSFCellStyle.BORDER_THIN);
style.setBorderTop(HSSFCellStyle.BORDER_THIN);
style.setAlignment(HSSFCellStyle.ALIGN_CENTER);
// 生成一个字体
HSSFFont font = workbook.createFont();
font.setColor(HSSFColor.VIOLET.index);
font.setFontHeightInPoints((short) 12);
font.setBoldweight(HSSFFont.BOLDWEIGHT_BOLD);
// 把字体应用到当前的样式
style.setFont(font);
// 生成并设置另一个样式
HSSFCellStyle style2 = workbook.createCellStyle();
style2.setFillForegroundColor(HSSFColor.LIGHT_YELLOW.index);
style2.setFillPattern(HSSFCellStyle.SOLID_FOREGROUND);
style2.setBorderBottom(HSSFCellStyle.BORDER_THIN);
style2.setBorderLeft(HSSFCellStyle.BORDER_THIN);
style2.setBorderRight(HSSFCellStyle.BORDER_THIN);
style2.setBorderTop(HSSFCellStyle.BORDER_THIN);
style2.setAlignment(HSSFCellStyle.ALIGN_CENTER);
style2.setVerticalAlignment(HSSFCellStyle.VERTICAL_CENTER);
// 生成另一个字体
HSSFFont font2 = workbook.createFont();
font2.setBoldweight(HSSFFont.BOLDWEIGHT_NORMAL);
// 把字体应用到当前的样式
style2.setFont(font2);
// 产生表格标题行
HSSFRow row = sheet.createRow(0);
for (short i = 0; i < headers.length; i++) {
HSSFCell cell = row.createCell(i);
cell.setCellStyle(style);
HSSFRichTextString text = new HSSFRichTextString(headers[i]);
cell.setCellValue(text);
}
// 遍历集合数据，产生数据行
Iterator<?> it = dataset.iterator();
int index = 0;
while (it.hasNext()) {
index++;
row = sheet.createRow(index);
Object t = it.next();
// 利用反射，根据javabean属性的先后顺序，动态调用getXxx()方法得到属性值
Field[] fields = t.getClass().getDeclaredFields();
for (short i = 0; i < fields.length; i++) {
HSSFCell cell = row.createCell(i);
cell.setCellStyle(style2);
Field field = fields[i];
String fieldName = field.getName();
String getMethodName = "get"
+ fieldName.substring(0, 1).toUpperCase()
+ fieldName.substring(1);//注意 实体get Set不要自己改名字不然反射会有问题
try {
Class tCls = t.getClass();
Method getMethod = tCls.getMethod(getMethodName,new Class[] {});
Object value = getMethod.invoke(t, new Object[] {});
HSSFRichTextString richString = new HSSFRichTextString(value.toString());
HSSFFont font3 = workbook.createFont();
font3.setColor(HSSFColor.BLUE.index);
richString.applyFont(font3);
cell.setCellValue(richString);
} catch (SecurityException e) {
e.printStackTrace();
e=null;
} catch (NoSuchMethodException e) {
e.printStackTrace();
e=null;
} catch (IllegalArgumentException e) {
e.printStackTrace();
e=null;
} catch (IllegalAccessException e) {
e.printStackTrace();
e=null;
} catch (InvocationTargetException e) {
e.printStackTrace();
e=null;
} finally {
// 清理资源
}
}
}
try {
workbook.write(out);
} catch (IOException e) {
e.printStackTrace();
e=null;
}
}
}