在SpringBoot: SpringBoot里面创建导出Excel的接口教程

  org.apache.poipoi3.17

 import org.apache.poi.hssf.usermodel.*; import org.springframework.stereotype.Controller; import org.springframework.web.bind.annotation.RequestMapping; import javax.servlet.http.HttpServletResponse; import java.io.IOException; @Controller public class ExcelController { /** * Excel表格导出接口 * http://localhost:8080/ExcelDownload * @param response response对象 * @throws IOException 抛IO异常 */ @RequestMapping("/ExcelDownload") public void excelDownload(HttpServletResponse response) throws IOException { //表头数据 String[] header = {"ID", "姓名", "性别", "年龄", "地址", "分数"}; //数据内容 String[] student1 = {"1", "小红", "女", "23", "成都青羊区", "96"}; String[] student2 = {"2", "小强", "男", "26", "成都金牛区", "91"}; String[] student3 = {"3", "小明", "男", "28", "成都武侯区", "90"}; //声明一个工作簿 HSSFWorkbook workbook = new HSSFWorkbook(); //生成一个表格，设置表格名称为"学生表" HSSFSheet sheet = workbook.createSheet("学生表"); //设置表格列宽度为10个字节 sheet.setDefaultColumnWidth(10); //创建第一行表头 HSSFRow headrow = sheet.createRow(0); //遍历添加表头(下面模拟遍历学生，也是同样的操作过程) for (int i = 0; i <header.length; i++) { //创建一个单元格 HSSFCell cell = headrow.createCell(i); //创建一个内容对象 HSSFRichTextString text = new HSSFRichTextString(header[i]); //将内容对象的文字内容写入到单元格中 cell.setCellValue(text); } //模拟遍历结果集，把内容加入表格 //模拟遍历第一个学生 HSSFRow row1 = sheet.createRow(1); for (int i = 0; i <student1.length; i++) { HSSFCell cell = row1.createCell(i); HSSFRichTextString text = new HSSFRichTextString(student1[i]); cell.setCellValue(text); } //模拟遍历第二个学生 HSSFRow row2 = sheet.createRow(2); for (int i = 0; i <student2.length; i++) { HSSFCell cell = row2.createCell(i); HSSFRichTextString text = new HSSFRichTextString(student2[i]); cell.setCellValue(text); } //模拟遍历第三个学生 HSSFRow row3 = sheet.createRow(3); for (int i = 0; i <student3.length; i++) { HSSFCell cell = row3.createCell(i); HSSFRichTextString text = new HSSFRichTextString(student3[i]); cell.setCellValue(text); } //准备将Excel的输出流通过response输出到页面下载 //八进制输出流 response.setContentType("application/octet-stream"); //这后面可以设置导出Excel的名称，此例中名为student.xls response.setHeader("Content-disposition", "attachment;filename=student.xls"); //刷新缓冲 response.flushBuffer(); //workbook将Excel写入到response的输出流中，供页面下载 workbook.write(response.getOutputStream()); } } 

 import org.apache.poi.hssf.usermodel.*; import javax.servlet.http.HttpServletResponse; import java.io.IOException; import java.util.List; /** * Excel工具类 */ public class ExcelUtil { /** * Excel表格导出 * @param response HttpServletResponse对象 * @param excelData Excel表格的数据，封装为List<List> * @param sheetName sheet的名字 * @param fileName 导出Excel的文件名 * @param columnWidth Excel表格的宽度，建议为15 * @throws IOException 抛IO异常 */ public static void exportExcel(HttpServletResponse response, List<List> excelData, String sheetName, String fileName, int columnWidth) throws IOException { //声明一个工作簿 HSSFWorkbook workbook = new HSSFWorkbook(); //生成一个表格，设置表格名称 HSSFSheet sheet = workbook.createSheet(sheetName); //设置表格列宽度 sheet.setDefaultColumnWidth(columnWidth); //写入List<List>中的数据 int rowIndex = 0; for(List data : excelData){ //创建一个row行，然后自增1 HSSFRow row = sheet.createRow(rowIndex++); //遍历添加本行数据 for (int i = 0; i <data.size(); i++) { //创建一个单元格 HSSFCell cell = row.createCell(i); //创建一个内容对象 HSSFRichTextString text = new HSSFRichTextString(data.get(i)); //将内容对象的文字内容写入到单元格中 cell.setCellValue(text); } } //准备将Excel的输出流通过response输出到页面下载 //八进制输出流 response.setContentType("application/octet-stream"); //设置导出Excel的名称 response.setHeader("Content-disposition", "attachment;filename=" + fileName); //刷新缓冲 response.flushBuffer(); //workbook将Excel写入到response的输出流中，供页面下载该Excel文件 workbook.write(response.getOutputStream()); //关闭workbook workbook.close(); } } 

 /** * Excel表格导出接口 * http://localhost:8080/ExcelDownload * @param response response对象 * @throws IOException 抛IO异常 */ @RequestMapping("/ExcelDownload") public void excelDownload(HttpServletResponse response) throws IOException { List<List> excelData = new ArrayList(); List head = new ArrayList(); head.add("第一列"); head.add("第二列"); head.add("第三列"); List data1 = new ArrayList(); data1.add("123"); data1.add("234"); data1.add("345"); List data2 = new ArrayList(); data2.add("abc"); data2.add("bcd"); data2.add("cde"); excelData.add(head); excelData.add(data1); excelData.add(data2); String sheetName = "测试"; String fileName = "ExcelTest.xls"; ExcelUtil.<mark style="color:transparent">来源gaodaimacom搞#^代%!码&网</mark>exportExcel(response, excelData, sheetName, fileName, 15); }