java导出包含多个sheet的Excel

时间:2022-12-25 09:31:05


     前面文章已经介绍了导出简单的Excel,这次小编要介绍的是如何导出含有多个sheet表的Excel。


    内容和上篇文章(http://blog.csdn.net/xiao714041/article/details/77423824)基本上是相同的,相同代码不再赘述,文章主要说关键代码。


    要导出多个sheet,关键就是Excel导出的时间设定,在执行导出文件之前,创建多个工作表

HSSFSheet sheet = workbook.createSheet(sheettitle);  

    这样每创建一个工作表,便会生成一个新的sheet表,在最后导出Excel的时候一次性导出。


    示例:

    Java类:

try {  
HSSFWorkbook workbook = new HSSFWorkbook();
OutputStream out = response.getOutputStream();
for(int j=0;j<n;j++){
BaseResult<List<T>> teasalList = service.select(teasal);
//接下来循环list放到Excel表中
if(teasalList.isSuccess()&&teasalList.getResult().size()>0){
//文件标题
SimpleDateFormat formatter1 = new SimpleDateFormat("yyyy-MM-dd");
String nowdate = formatter1.format(new Date());
String title = null;
title = "excel表格标题-" + nowdate + ".xls";
String sheettitle = "sheet表名";
//设置表格标题行
String oneheaders = "首行标题" ;
String dateheaders = nowdate ;
String[] headers = new String[] {"列1","列2","列3","列4"};
List<Object[]> dataList = new ArrayList<Object[]>();
Object[] objs = null;
for(int i =0; i<3 ; i++){ //循环每一条数据
objs = new Object[headers.length];
objs[1] = "张三"; //姓名
objs[2] = "3"; //序号
//数据添加到excel表格
dataList.add(objs);
}
//使用流将数据导出
//防止中文乱码
String headStr = "attachment; filename=\"" + new String( title.getBytes("gb2312"), "ISO8859-1" ) + "\"";
response.setContentType("octets/stream");
response.setContentType("APPLICATION/OCTET-STREAM");
response.setHeader("Content-Disposition", headStr);
ExportExcelDownFee ex ;
ex = new ExportExcelDownFee(sheettitle, oneheaders, dateheaders,headers, dataList);//没有标题
ex.export(workbook,out);
}
}
workbook.write(out); //循环生成多个sheet之后在导出Excel
out.close(); //关闭流
} catch (Exception e) {
e.printStackTrace();
}



    工具类:

public class ExportExcelDownFee {  

//导出表的列名
private String[] rowName ;
//导出表的小标题
private String oneheaders;
//导出表的日期
private String dateheaders;
//sheet表表名
private String sheettitle;

private List<Object[]> dataList = new ArrayList<Object[]>();

HttpServletResponse response;

//构造方法2,传入要导出的数据
public ExportExcelDownFee( String sheettitle, String oneheaders, String dateheaders, String[] rowName,List<Object[]> dataList){
this.dataList = dataList;
this.oneheaders = oneheaders;
this.dateheaders = dateheaders;
this.rowName = rowName;
this.sheettitle = sheettitle;
}

/*
* 导出数据
* */
public void export(HSSFWorkbook workbook,OutputStream out) throws Exception{
try{
HSSFSheet sheet = workbook.createSheet(sheettitle); // 创建工作表

HSSFCellStyle columnTopStyle = this.getColumnTopStyle(workbook);//获取列头样式对象
HSSFCellStyle style = this.getStyle(workbook); //单元格样式对象

//第一行
HSSFRow rowfirstName = sheet.createRow(0);
HSSFCell oneCellRowName = rowfirstName.createCell(0); //创建列头对应个数的单元格
oneCellRowName.setCellType(HSSFCell.CELL_TYPE_STRING); //设置列头单元格的数据类型
HSSFRichTextString onetext = new HSSFRichTextString(oneheaders);
oneCellRowName.setCellValue(onetext); //设置列头单元格的值
//合并单元格CellRangeAddress构造参数依次表示起始行,截至行,起始列, 截至列
sheet.addMergedRegion(new CellRangeAddress(0,0,0,3));
oneCellRowName.setCellStyle(columnTopStyle); //设置列头单元格样式

//第二行
HSSFRow rowDateName = sheet.createRow(1);
HSSFCell DateCellRowName = rowDateName.createCell(3);
DateCellRowName.setCellValue(dateheaders);
DateCellRowName.setCellStyle(columnTopStyle);

// 定义所需列数
int columnNum = rowName.length;
HSSFRow rowRowName = sheet.createRow(2); // 在索引2的位置创建行(最顶端的行开始的第二行)

// 将列头设置到sheet的单元格中
for(int n=0;n<columnNum;n++){
HSSFCell cellRowName = rowRowName.createCell(n); //创建列头对应个数的单元格
cellRowName.setCellType(HSSFCell.CELL_TYPE_STRING); //设置列头单元格的数据类型
HSSFRichTextString text = new HSSFRichTextString(rowName[n]);
cellRowName.setCellValue(text); //设置列头单元格的值
cellRowName.setCellStyle(style); //设置列头单元格样式
}

//将查询出的数据设置到sheet对应的单元格中
for(int i=0;i<dataList.size();i++){

Object[] obj = dataList.get(i);//遍历每个对象
HSSFRow row = sheet.createRow(i+3);//创建所需的行数(从第二行开始写数据)

for(int j=0; j<obj.length; j++){
HSSFCell cell = null; //设置单元格的数据类型
if(j == 0){
cell = row.createCell(j,HSSFCell.CELL_TYPE_NUMERIC);
cell.setCellValue(i+1);
}else{
cell = row.createCell(j,HSSFCell.CELL_TYPE_STRING);
if(!"".equals(obj[j]) && obj[j] != null){
cell.setCellValue(obj[j].toString()); //设置单元格的值
}
}
cell.setCellStyle(style); //设置单元格样式
}
}

//让列宽随着导出的列长自动适应
for (int colNum = 0; colNum < columnNum; colNum++) {
int columnWidth = sheet.getColumnWidth(colNum) / 256;
for (int rowNum = 0; rowNum < sheet.getLastRowNum(); rowNum++) {
HSSFRow currentRow;
//当前行未被使用过
if (sheet.getRow(rowNum) == null) {
currentRow = sheet.createRow(rowNum);
} else {
currentRow = sheet.getRow(rowNum);
}
if (currentRow.getCell(colNum) != null) {
HSSFCell currentCell = currentRow.getCell(colNum);
if (currentCell.getCellType() == HSSFCell.CELL_TYPE_STRING) {
int length = 0;
try {
length = currentCell.getStringCellValue().getBytes().length;
} catch (Exception e) {
e.printStackTrace();
}
if (columnWidth < length) {
columnWidth = length;
}
}
}

}
if(colNum == 0){
sheet.setColumnWidth(colNum, (columnWidth-2) * 256);
}else{
sheet.setColumnWidth(colNum, (columnWidth+4) * 256);
}
}

}catch(Exception e){
e.printStackTrace();
}
}

/*
* 列头单元格样式
*/
public HSSFCellStyle getColumnTopStyle(HSSFWorkbook workbook) {

// 设置字体
HSSFFont font = workbook.createFont();
//设置字体大小
font.setFontHeightInPoints((short)11);
//字体加粗
//font.setBoldweight(HSSFFont.BOLDWEIGHT_BOLD);
//设置字体名字
font.setFontName("宋体");
//设置样式;
HSSFCellStyle style = workbook.createCellStyle();
//在样式用应用设置的字体;
style.setFont(font);
//设置自动换行;
style.setWrapText(false);
//设置水平对齐的样式为居中对齐;
style.setAlignment(HSSFCellStyle.ALIGN_CENTER);
//设置垂直对齐的样式为居中对齐;
style.setVerticalAlignment(HSSFCellStyle.VERTICAL_CENTER);

return style;

}

/*
* 列数据信息单元格样式
*/
public HSSFCellStyle getStyle(HSSFWorkbook workbook) {
// 设置字体
HSSFFont font = workbook.createFont();
//设置字体名字
font.setFontName("宋体");
//设置样式;
HSSFCellStyle style = workbook.createCellStyle();
//设置底边框;
style.setBorderBottom(HSSFCellStyle.BORDER_THIN);
//设置底边框颜色;
style.setBottomBorderColor(HSSFColor.BLACK.index);
//设置左边框;
style.setBorderLeft(HSSFCellStyle.BORDER_THIN);
//设置左边框颜色;
style.setLeftBorderColor(HSSFColor.BLACK.index);
//设置右边框;
style.setBorderRight(HSSFCellStyle.BORDER_THIN);
//设置右边框颜色;
style.setRightBorderColor(HSSFColor.BLACK.index);
//设置顶边框;
style.setBorderTop(HSSFCellStyle.BORDER_THIN);
//设置顶边框颜色;
style.setTopBorderColor(HSSFColor.BLACK.index);
//在样式用应用设置的字体;
style.setFont(font);
//设置自动换行;
style.setWrapText(false);
//设置水平对齐的样式为居中对齐;
style.setAlignment(HSSFCellStyle.ALIGN_CENTER);
//设置垂直对齐的样式为居中对齐;
style.setVerticalAlignment(HSSFCellStyle.VERTICAL_CENTER);

return style;

}
}