SpringBoot 导出数据生成excel文件返回方式

  org.apache.poipoi3.17 org.apache.poipoi-ooxml3.17 org.apache.poipoi-ooxml-schemas3.17

 /** * @desc:数据导出，生成excel文件时的列名称集合 * @author: chao * @time: 2018.6.11 */ public class ColumnTitleMap { private Map columnTitleMap = new HashMap(); private ArrayList titleKeyList = new ArrayList (); public ColumnTitleMap(String datatype) { switch (datatype) { case "userinfo": initUserInfoColu(); initUserInfoTitleKeyList(); break; default: break; } } /** * mysql用户表需要导出字段--显示名称对应集合 */ private void initUserInfoColu() { columnTitleMap.put("id", "ID"); columnTitleMap.put("date_create", "注册时间"); columnTitleMap.put("name", "名称"); columnTitleMap.put("mobile", "手机号"); columnTitleMap.put("email", "邮箱"); columnTitleMap.put("pw", "密码"); columnTitleMap.put("notice_voice", "语音通知开关"); columnTitleMap.put("notice_email", "邮箱通知开关"); columnTitleMap.put("notice_sms", "短信通知开关"); columnTitleMap.put("notice_push", "应用通知开关"); } /** * mysql用户表需要导出字段集 */ private void initUserInfoTitleKeyList() { titleKeyList.add("id"); titleKeyList.add("date_create"); titleKeyList.add("name"); titleKeyList.add("mobile"); titleKeyList.add("email"); titleKeyList.add("pw"); titleKeyList.add("notice_voice"); titleKeyList.add("notice_email"); titleKeyList.add("notice_sms"); titleKeyList.add("notice_push"); } public Map getColumnTitleMap() { return columnTitleMap; } public ArrayList getTitleKeyList() { return titleKeyList; } } 

 package com.mcrazy.apios.controller; import com.mcrazy.apios.service.ExportDataService; import com.mcrazy.apios.service.UserInfoService; import com.mcrazy.apios.util.datebase.columntitle.ColumnTitleMap; import org.springframework.beans.factory.annotation.Autowired; import org.springframework.stereotype.Controller; import org.springframework.web.bind.annotation.GetMapping; import org.springframework.web.bind.annotation.RequestMapping; import org.springframework.web.bind.annotation.RequestParam; import javax.servlet.http.HttpServletResponse; import java.util.ArrayList; import java.util.List; import java.util.Map; /** * @desc:数据导出api控制器 * @author: chao * @time: 2018.6.11 */ @Controller @RequestMapping(value = "/exportdata") public class ExportDataController { @Autowired UserInfoService userInfoService; @Autowired ExportDataService exportDataService; /** * @api: /apios/exportdata/excel/ * @method: GET * @desc: 导出数据，生成xlsx文件 * @param response 返回对象 * @param date_start 筛选时间，开始(预留，查询时并未做筛选数据处理) * @param date_end 筛选时间，结束(预留，查询时并未做筛选数据处理) */ @GetMapping(value = "/excel") public void getUserInfoEx( HttpServletResponse response, @RequestParam String date_start, @RequestParam String date_end ) { try { List> userList = userInfoService.queryUserInfoResultListMap(); ArrayList titleKeyList= new ColumnTitleMap("userinfo").getTitleKeyList(); Map titleMap = new ColumnTitleMap("userinfo").getColumnTitleMap(); exportDataService.exportDataToEx(response, titleKeyList, titleMap, userList); } catch (Exception e) { // System.out.println(e.toString()); } } } 

 package com.mcrazy.apios.mapper; import com.mcrazy.apios.model.UserInfo; import org.apache.ibatis.annotations.Mapper; import java.util.List; import java.util.Map; @Mapper public interface UserInfoMapper { /** * @desc 查询所有用户信息 * @return 返回多个用户List * */ List> queryUserInfoResultListMap(); } 

    select * from user_info 

 package com.mcrazy.apios.service; import com.mcrazy.apios.mapper.UserInfoMapper; import com.mcrazy.apios.model.UserInfo; import org.springframework.beans.factory.annotation.Autowired; import org.springframework.stereotype.Service; import java.util.List; import java.util.Map; @Service public class UserInfoService { @Autowired UserInfoMapper userInfoMapper; /** * @desc 查询所有用户信息 * @return 返回多个用户List * */ public List> queryUserInfoResultListMap() { List> list = userInfoMapper.queryUserInfoResultListMap(); return list; } } 

 package com.mcrazy.apios.service; import com.mcrazy.apios.util.datebase.ExportExcelUtil; import org.springframework.beans.factory.annotation.Autowired; import org.springframework.stereotype.Service; import javax.servlet.http.HttpServletResponse; import java.util.ArrayList; import java.util.List; import java.util.Map; /** * @desc:数据导出服务 * @author: chao * @time: 2018.6.11 */ @Service public class ExportDataService { @Autowired ExportExcelUtil exportExcelUtil; /*导出用户数据表*/ public void exportDataToEx(HttpServletResponse response, ArrayList titleKeyList, Map titleMap, List> src_list) { try { exportExcelUtil.expoerDataExcel(response, titleKeyList, titleMap, src_list); } catch (Exception e) { System.out.println("Exception: " + e.toString()); } } } 

 package com.mcrazy.apios.util.datebase; import com.mcrazy.apios.util.object.DateUtils; import org.apache.poi.ss.usermodel.*; import org.apache.poi.xssf.streaming.SXSSFWorkbook; import org.springframework.stereotype.Service; import javax.servlet.http.HttpServletResponse; import java.io.IOException; import java.io.OutputStream; import java.util.ArrayList; import java.util.List; import java.util.Map; /** * @desc:数据导出，生成excel文件 * @author: chao * @time: 2018.6.12 */ @Service public class ExportExcelUtil { public void expoerDataExcel(HttpServletResponse response, ArrayList titleKeyList, Map titleMap, List> src_list) throws IOException { String xlsFile_name = DateUtils.currtimeToString14() + ".xlsx";  //输出xls文件名称 //内存中只创建100个对象 Workbook wb = new SXSSFWorkbook(100);   //关键语句 Sheet sheet = null;  //工作表对象 Row nRow = null;  //行对象 Cell nCell = null;  //列对象 int rowNo = 0;  //总行号 int pageRowNo = 0; //页行号 for (int k=0;k srcMap = src_list.get(k); //写入300000条后切换到下个工作表 if(rowNo%300000==0){ wb.createSheet("工作簿"+(rowNo/300000));//创建新的sheet对象 sheet = wb.getSheetAt(rowNo/300000);  //动态指定当前的工作表 pageRowNo = 0;  //新建了工作表,重置工作表的行号为0 // -----------定义表头----------- nRow = sheet.createRow(pageRowNo++); // 列数 titleKeyList.size() for(int i=0;i
得到xlsx文件，查看数据
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