Strust2 + POI export exel table and solve the Chinese garbled file name / no show

1. Download and import the project [ poi.3.17.jar ]

2. strust.xml

   <action name="returnLate_*" class="com.stureturnlate.moudels.biz.action.return_late.ReturnLateAction" method="{1}">
               <result name="list">/page/moudels/biz/return_late/returnLateList.jsp</result>
               <result name="openAdd">/page/moudels/biz/return_late/returnLateAdd.jsp</result>
               <!--<result name="openEdit">/page/biz/student/studentUpdate.jsp</result>-->
               <result name="openDetails">/page/moudels/biz/return_late/returnLateDetails.jsp</result>
   
               <!-- 导出Excel -->
               <result name="download" type="stream">
                   <param name="contentType">application/vnd.ms-excel</param><!-- 注意这里的ContentType -->
                   <param name="contentDisposition">attachment;filename="${fileName}.xls"</param><!-- 下载文件的名字 -->
                   <param name="bufferSize"1048576</ param> <-! Download file size1024>1M = -> 
                   <param name = " inputName " > ExcelFile </ param> <-! Here and Action in need of the same variable name -> 
               </ the Result> 
           </ Action>

    

    

3. ReturnLateAction.class

       / ** 
        * export 
        * @return 
        * / 
       public String downloads () throws Exception { 
   
           List <ReturnLateEntity> = returnLateEntityList new new the ArrayList <> (); 
           fileName = fileName + DateTool.dateFormat ( new new a Date ());
            fileName = new new String (fileName .getBytes ( "GB2312"), "ISO8859-1" ) ; // prevent Chinese garbled or not displayed
    // TODO the first step: a statement of the document object excel 
           HSSFWorkbook returnLateExcel;
            the try {
                // result of the query, insert padding Excel data
               String [] = IDS returnLateIds.split ( "," ); 
               returnLateEntityList = returnLateService.selectAllReturnLate (IDS); 
   
               // TODO Step Two: Get excel document object 
               returnLateExcel = CreateExcel.createReturnLateExcel (returnLateEntityList); 
   
               ByteArrayOutputStream the Output = new new ByteArrayOutputStream ( ); // ByteArrayOutputStream 
   
               // the TODO step: write byte array output stream 
               returnLateExcel.write (output);
                byte [] BA = output.toByteArray (); 
   
               // the TODO fourth step: input assignment stream object 
               ExcelFile = new new A ByteArrayInputStream (BA);
   
               output.flush (); 
               output.close (); // Close 
           } the catch (SQLException E) { 
               System.out.println ( "write back late log file or create content Fail Fail!" ); 
               e.printStackTrace (); 
           } the catch (IOException E) { 
               e.printStackTrace (); 
           } 
   
           return "downloads" ; 
       }

    

4. File Export class CreateExcel.class

   package com.stureturnlate.common;
   
   import com.stureturnlate.moudels.vo.*;
   import org.apache.poi.hssf.usermodel.*;
   import org.apache.poi.ss.usermodel.HorizontalAlignment;
   
   import java.sql.SQLException;
   import java.util.List;
   
   /**
    * @author soldier
    * @title: CreateExcel
    * @projectName stu_return_late
    * @description: 文件导出Excel
    * @date 19-6-10下午9:56
    */
   public class CreateExcel {
   
       public static HSSFWorkbook createReturnLateExcel(List<ReturnLateEntity> returnLateEntityList) throws SQLException {
            // create an Excel file 
           HSSFWorkbook Workbook = new new HSSFWorkbook (); // Excel document object
            // create a worksheet 
           HSSFSheet sheet = workbook.createSheet ( "Students coming home record" );
            // add a header row 
           HSSFRow = sheet.createRow HSSFRow (0 );
            // Format cells centered 
           HSSFCellStyle CellStyle = workbook.createCellStyle (); 
           cellStyle.setAlignment (HorizontalAlignment.CENTER); 
   
           int index = 0 ;
            // add header content 
           HSSFCell headCell = hssfRow .createCell (index ++ );
           headCell.setCellValue ( "coming home number" ); 
           headCell.setCellStyle (CellStyle); 
   
           headCell = hssfRow.createCell (index ++ ); 
           headCell.setCellValue ( "Students coming home" ); 
           headCell.setCellStyle (CellStyle); 
   
           headCell = hssfRow.createCell (index ++ ); 
           headCell.setCellValue ( "belongs to School" ); 
           headCell.setCellStyle (CellStyle); 
   
           headCell = hssfRow.createCell (index ++ ); 
           headCell.setCellValue ( "the student's dormitory" ); 
           headCell.setCellStyle (CellStyle); 
   
           headCellHssfRow.createCell = (index ++ ); 
           headCell.setCellValue ( "coming home time" ); 
           headCell.setCellStyle (CellStyle); 
   
           headCell = hssfRow.createCell (index ++ ); 
           headCell.setCellValue ( "Cause coming home" ); 
           headCell.setCellStyle ( CellStyle); 
   
           headCell = hssfRow.createCell (index ++ ); 
           headCell.setCellValue ( "recorder work number" ); 
           headCell.setCellStyle (CellStyle); 
   
           headCell = hssfRow.createCell (index); 
           headCell.setCellValue ( "record name" ) ; 
           headCell.setCellStyle (CellStyle);
   
           // 添加数据内容
           for (int i = 0; i < returnLateEntityList.size(); i++) {
               hssfRow = sheet.createRow((int) i + 1);
               ReturnLateEntity returnLateEntity = returnLateEntityList.get(i);
   
               index = 0;
               // 创建单元格，并设置值
               HSSFCell cell = hssfRow.createCell(index++);
               cell.setCellValue(returnLateEntity.getReturnLateId());
               cell.setCellStyle(cellStyle);
   
               cell = hssfRow.createCell(index++);
               StudentEntity studentEntity = new StudentEntity();//获取学生名称
               cell.setCellValue(studentEntity.getStudentName());
               cell.setCellStyle(cellStyle);
   
               cell = hssfRow.createCell(index++);
               CollegeEntity collegeEntity = new CollegeEntity();//获取学院
               cell.setCellValue(collegeEntity.getCollegeName());
               cell.setCellStyle(cellStyle);
   
               cell = hssfRow.createCell(index++);
               HostelEntity hostelEntity = new HostelEntity();//获取宿舍名称
               cell.setCellValue(hostelEntity.getHostelName());
               cell.setCellStyle(cellStyle);
   
               cell = hssfRow.createCell(index++);
               cell.setCellValue(DateTool.dateTimeFormat(returnLateEntity.getReturnLateTime()));
               cell.setCellStyle(cellStyle);
   
               cell = hssfRow.createCell(index++);
               cell.setCellValue(returnLateEntity.getReturnLateCause());
               cell.setCellStyle(cellStyle);
   
               cell = hssfRow.createCell(index++);
               DormMasterEntity dormMasterEntity = new DormMasterEntity();
               cell.setCellValue(dormMasterEntity.getDormMasterId());
               cell.setCellStyle(cellStyle);
   
               cell = hssfRow.createCell(index);
               cell.setCellValue(dormMasterEntity.getDormMasterName());
               cell.setCellStyle(cellStyle);
           }
   
           try {
               return workbook;
   
           } catch (Exception e) {
               e.printStackTrace();
           }
           return null;
       }
   }