[Java] java导出包含多个sheet的Excel代码示例

hssfsheet sheet = workbook.createsheet(sheettitle);

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 java" id="highlighter_950979">


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; 
 
   } 
}