一、前言
数据导出为Excel在我们写项目的过程中经常用到
需要用到的jar包 poi-3.17.jar
二、具体实现步骤
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//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( "食物信息数据" );
//第三步,在sheet中添加表头第0行
HSSFRow row = sheet.createRow( 0 );
//第四步,创建单元格,并设置表头居中
HSSFCellStyle style = wb.createCellStyle();
style.setAlignment(HorizontalAlignment.CENTER); //居中格式
HSSFCell cell = row.createCell( 0 );
cell.setCellValue( "编号" );
cell.setCellStyle(style);
cell=row.createCell(( short ) 1 );
cell.setCellValue( "名称" );
cell.setCellStyle(style);
cell=row.createCell(( short ) 2 );
cell.setCellValue( "类型" );
cell.setCellStyle(style);
cell=row.createCell(( short ) 3 );
cell.setCellValue( "单价" );
cell.setCellStyle(style);
cell=row.createCell(( short ) 4 );
cell.setCellValue( "库存" );
cell.setCellStyle(style);
//第五步,写入实体数据,从数据库拿数据
FoodController controller= new FoodController();
List<Foods> foodsList = controller.foodsList( null , null );
for ( int i = 0 ; i < foodsList.size(); i++) {
//创建单元格,并赋值
row=sheet.createRow(i+ 1 );
Foods foods = foodsList.get(i);
row.createCell(( short ) 0 ).setCellValue(foods.getId());
row.createCell(( short ) 1 ).setCellValue(foods.getName());
row.createCell(( short ) 2 ).setCellValue(foods.getType());
row.createCell(( short ) 3 ).setCellValue(foods.getPrice());
row.createCell(( short ) 4 ).setCellValue(foods.getNum());
}
//第六步,下载Excel
OutputStream out= null ;
out=response.getOutputStream();
String fileName= "食物信息.xls" ;
response.setContentType( "application/x-=msdownload" );
response.setHeader( "Content-Disposition" , "attachment; filename="
+URLEncoder.encode(fileName, "UTF-8" ));
wb.write(out);
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三、实现效果图
导出成功后数据成功显示
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原文链接:https://blog.csdn.net/cst522445906/article/details/115903661