使用的是idea+restful风格第一:引入依赖为:第二步:上传文件的工具类import java.io.BufferedInputStream;import java.io.BufferedOutputStream;import java.io.ByteArrayInputStream;import java.io.ByteArrayOutputStream;import java.io.IOException;import java.io.InputStream;import java.lang.reflect.Method;import java.util.ArrayList;import java.util.HashMap;import java.util.List;import java.util.Map;
import javax.servlet.ServletOutputStream;import javax.servlet.http.HttpServletResponse;
import org.apache.poi.hssf.usermodel.HSSFWorkbook;import org.apache.poi.ss.usermodel.Cell;import org.apache.poi.ss.usermodel.CellStyle;import org.apache.poi.ss.usermodel.Font;import org.apache.poi.ss.usermodel.IndexedColors;import org.apache.poi.ss.usermodel.Row;import org.apache.poi.ss.usermodel.Sheet;import org.apache.poi.ss.usermodel.Workbook;
/*** @author qingmu* @version 创建时间:2017年12月28日 下午4:53:29* 类说明: POI导出工具类*/ public class ExportPOIUtils {
//参数说明: fileName:文件名 projects:对象集合 columnNames: 列名 keys: map中的key public static void start_download(HttpServletResponse response, String fileName, List> projects,String[] columnNames, String[] keys) throws IOException {
//将集合中对象的属性 对应到 List
ByteArrayOutputStream os = new ByteArrayOutputStream();try {//将转换成的Workbook对象通过流形式下载createWorkBook(list,keys,columnNames).write(os);} catch (IOException e) {e.printStackTrace();}byte[] content = os.toByteArray();InputStream is = new ByteArrayInputStream(content);// 设置response参数,可以打开下载页面response.reset();response.setContentType("application/vnd.ms-excel;charset=utf-8");response.setHeader("Content-Disposition", "attachment;filename="+ new String((fileName + ".xls").getBytes(), "iso-8859-1"));ServletOutputStream out = response.getOutputStream();BufferedInputStream bis = null;BufferedOutputStream bos = null;try {bis = new BufferedInputStream(is);bos = new BufferedOutputStream(out);byte[] buff = new byte[2048];int bytesRead;while (-1 != (bytesRead = bis.read(buff, 0, buff.length))) {bos.write(buff, 0, bytesRead);}} catch (final IOException e) {throw e;} finally {if (bis != null) bis.close();if (bos != null) bos.close();}}
private static List listmap.add(mapValue);}return listmap;}/*** 利用反射 根据属性名获取属性值* */ private static Object getFieldValueByName(String fieldName, Object o) {try {String firstLetter = fieldName.substring(0, 1).toUpperCase();String getter = "get" + firstLetter + fieldName.substring(1);Method method = o.getClass().getMethod(getter, new Class[] {});Object value = method.invoke(o, new Object[] {});return value;} catch (Exception e) {e.printStackTrace();return null;}}/*** 创建excel文档对象* @param keys list中map的key数组集合* @param columnNames excel的列名* */ private static Workbook createWorkBook(List for(int i=0;i // 创建第一行Row row = sheet.createRow((short) 0); // 创建两种单元格格式CellStyle cs = wb.createCellStyle();CellStyle cs2 = wb.createCellStyle(); // 创建两种字体Font f = wb.createFont();Font f2 = wb.createFont(); // 创建第一种字体样式(用于列名) f.setFontHeightInPoints((short) 10);f.setColor(IndexedColors.BLACK.getIndex());f.setBoldweight(Font.BOLDWEIGHT_BOLD); // 创建第二种字体样式(用于值) f2.setFontHeightInPoints((short) 10);f2.setColor(IndexedColors.BLACK.getIndex()); // 设置第一种单元格的样式(用于列名) cs.setFont(f);cs.setBorderLeft(CellStyle.BORDER_THIN);cs.setBorderRight(CellStyle.BORDER_THIN);cs.setBorderTop(CellStyle.BORDER_THIN);cs.setBorderBottom(CellStyle.BORDER_THIN);cs.setAlignment(CellStyle.ALIGN_CENTER); // 设置第二种单元格的样式(用于值) cs2.setFont(f2);cs2.setBorderLeft(CellStyle.BORDER_THIN);cs2.setBorderRight(CellStyle.BORDER_THIN);cs2.setBorderTop(CellStyle.BORDER_THIN);cs2.setBorderBottom(CellStyle.BORDER_THIN);cs2.setAlignment(CellStyle.ALIGN_CENTER);//设置列名for(int i=0;i import javax.servlet.http.HttpServletResponse;import java.io.IOException;import java.util.ArrayList;import java.util.List; /*** @author qingmu* @date*/ public class UserController {@RequestMapping("exportList") public void exportList(HttpServletResponse response, String ids) { String fileName = "人员档案列表"; List // 列名String columnNames[] = {"ID", "姓名", "性别", "所属部门", "所属单位", "邮箱","电话", "手机", "学历/学位", "专业/专科方向", "直属上级", "账号锁定"};// map中的key String keys[] = {"id", "userName", "gender", "dept", "unit", "email","tel", "phone", "degree", "major", "parentName", "isLocked"};try {ExportPOIUtils.start_download(response, fileName, users, columnNames, keys);} catch (IOException e) {e.printStackTrace();}}}这里少了一个user实体类,你可以直接替换成你的要导出的实体类,就ok了. 简洁的代码,又高效的代码. 以上就是本文的全部内容,希望对大家的学习有所帮助,也希望大家多多支持脚本之家。 您可能感兴趣的文章:SpringBoot内存数据导出成Excel的实现方法SpringBoot导入导出数据实现方法详解使用VUE+SpringBoot+EasyExcel 整合导入导出数据的教程详解SpringBoot整合EasyExcel实现导入导出数据SpringBoot+easypoi实现数据的Excel导出SpringBoot 导出数据生成excel文件返回方式Springboot与vue实现数据导出方法具体介绍import com.example.uploaddemo.util.ExportPOIUtils;import org.springframework.web.bind.annotation.RequestMapping;
