使用的是idea+restful风格
第一:引入依赖为:
org.apache.xmlbeans xmlbeans 2.6.0 dom4j dom4j 1.6.1 org.apache.poi poi 3.9 org.apache.poi poi-ooxml 3.9
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> List> list=createExcelRecord(projects, keys); 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> createExcelRecord(List projects, String[] keys) { List> listmap = new ArrayList>(); Map map = new HashMap(); map.put("sheetName", "sheet"); listmap.add(map); Object project=null; for (int j = 0; j < projects.size(); j++) { project=projects.get(j); Map mapValue = new HashMap(); for(int i=0; i> list,String []keys,String columnNames[]) { // 创建excel工作簿 Workbook wb = new HSSFWorkbook(); // 创建第一个sheet（页），并命名 Sheet sheet = wb.createSheet(list.get(0).get("sheetName").toString()); // 手动设置列宽。第一个参数表示要为第几列设；，第二个参数表示列的宽度，n为列高的像素数。 for(int i=0;i第三步:controller层的编写
import com.example.uploaddemo.util.ExportPOIUtils;import org.springframework.web.bind.annotation.RequestMapping;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 users = new ArrayList(); // 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.
