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Java导出Excel实例操作

发布时间:2020-07-15 23:09:36 来源:网络 阅读:6129 作者:nineteens 栏目:编程语言

  导出excel是Java开发的必备技能,之前项目有这个功能,现在将其独立出来,分享一下。

  所用技术就是SpringBoot,然后是MVC架构模式。

  废话不多说,直接上代码了,源码点末尾链接就可以下载。

  (1)新建一个SpringBoot项目,然后导入eclipse),项目结构如下:

  

Java导出Excel实例操作


  (2)修改pom文件,添加依赖;

  org.springframework.boot

  spring-boot-starter-web

  org.springframework.boot

  spring-boot-starter-test

  test

  org.apache.poi

  poi

  3.14

  org.apache.poi

  poi-ooxml

  3.14

  org.apache.poi

  poi-contrib

  3.6

  org.apache.poi

  poi-ooxml-schemas

  3.17

  org.apache.poi

  poi-scratchpad

  3.17

  (3)新建一个实体类,命名为User.java;

  package com.twf.springcloud.ExportExcel.po;

  import java.io.Serializable;

  public class User implements Serializable{

  private static final long serialVersionUID = -9180229310895087286L;

  private String name; // 姓名

  private String sex; // 性别

  private Integer age; // 年龄

  private String phoneNo; // 手机号

  private String address; // 地址

  private String hobby; // 爱好

  public User(String name, String sex, Integer age, String phoneNo, String address, String hobby) {

  super();

  this.name = name;

  this.sex = sex;

  this.age = age;

  this.phoneNo = phoneNo;

  this.address = address;

  this.hobby = hobby;

  }

  public String getName() {

  return name;

  }

  public void setName(String name) {

  this.name = name;

  }

  public String getSex() {

  return sex;

  }

  public void setSex(String sex) {

  this.sex = sex;

  }

  public Integer getAge() {

  return age;

  }

  public void setAge(Integer age) {

  this.age = age;

  }

  public String getPhoneNo() {

  return phoneNo;

  }

  public void setPhoneNo(String phoneNo) {

  this.phoneNo = phoneNo;

  }

  public String getAddress() {

  return address;

  }

  public void setAddress(String address) {

  this.address = address;

  }

  public String getHobby() {

  return hobby;

  }

  public void setHobby(String hobby) {

  this.hobby = hobby;

  }

  @Override

  public String toString() {

  return "User [name=" + name + ", sex=" + sex + ", age=" + age + ", phoneNo=" + phoneNo + ", address=" + address

  + ", hobby=" + hobby + "]";

  }

  }

  (4)新建一个excel样式工具类;

  package com.twf.springcloud.ExportExcel.utils;

  import org.apache.poi.hssf.usermodel.HSSFCellStyle;

  import org.apache.poi.hssf.usermodel.HSSFFont;

  import org.apache.poi.hssf.usermodel.HSSFWorkbook;

  import org.apache.poi.hssf.util.HSSFColor;

  import org.apache.poi.ss.usermodel.CellStyle;

  import org.apache.poi.ss.usermodel.Font;

  import org.apache.poi.xssf.streaming.SXSSFCell;

  import org.apache.poi.xssf.streaming.SXSSFRow;

  import org.apache.poi.xssf.streaming.SXSSFSheet;

  import org.apache.poi.xssf.streaming.SXSSFWorkbook;

  /**

  * excle样式工具类

  */

  public class ExcelFormatUtil {

  /**

  * 设置报表头样式

  * @param workbook

  * @return

  */

  public static CellStyle headSytle(SXSSFWorkbook workbook){

  // 设置style1的样式,此样式运用在第二行

  CellStyle style1 = workbook.createCellStyle();// cell样式

  // 设置单元格背景色,设置单元格背景色以下两句必须同时设置

  style1.setFillPattern(HSSFCellStyle.SOLID_FOREGROUND);// 设置填充样式

  style1.setFillForegroundColor(HSSFColor.GREY_25_PERCENT.index);// 设置填充色

  // 设置单元格上、下、左、右的边框线

  style1.setBorderBottom(HSSFCellStyle.BORDER_THIN);

  style1.setBorderLeft(HSSFCellStyle.BORDER_THIN);

  style1.setBorderRight(HSSFCellStyle.BORDER_THIN);

  style1.setBorderTop(HSSFCellStyle.BORDER_THIN);

  Font font1 = workbook.createFont();// 创建一个字体对象

  font1.setBoldweight((short) 10);// 设置字体的宽度

  font1.setFontHeightInPoints((short) 10);// 设置字体的高度

  font1.setBoldweight(HSSFFont.BOLDWEIGHT_BOLD);// 粗体显示

  style1.setFont(font1);// 设置style1的字体

  style1.setWrapText(true);// 设置自动换行

  style1.setAlignment(HSSFCellStyle.ALIGN_CENTER);// 设置单元格字体显示居中(左右方向)

  style1.setVerticalAlignment(HSSFCellStyle.VERTICAL_CENTER);// 设置单元格字体显示居中(上下方向)

  return style1;

  }

  /**

  * 设置报表体样式

  * @param wb

  * @return

  */

  public static CellStyle contentStyle(SXSSFWorkbook wb){

  // 设置style1的样式,此样式运用在第二行

  CellStyle style1 = wb.createCellStyle();// cell样式

  // 设置单元格上、下、左、右的边框线

  style1.setBorderBottom(HSSFCellStyle.BORDER_THIN);

  style1.setBorderLeft(HSSFCellStyle.BORDER_THIN);

  style1.setBorderRight(HSSFCellStyle.BORDER_THIN);

  style1.setBorderTop(HSSFCellStyle.BORDER_THIN);

  style1.setWrapText(true);// 设置自动换行

  style1.setAlignment(HSSFCellStyle.ALIGN_LEFT);// 设置单元格字体显示居中(左右方向)

  style1.setVerticalAlignment(HSSFCellStyle.VERTICAL_CENTER);// 设置单元格字体显示居中(上下方向)

  return style1;

  }

  /**

  * 设置报表标题样式

  * @param workbook

  * @return

  */

  public static HSSFCellStyle titleSytle(HSSFWorkbook workbook,short color,short fontSize){

  // 设置style1的样式,此样式运用在第二行

  HSSFCellStyle style1 = workbook.createCellStyle();// cell样式

  // 设置单元格背景色,设置单元格背景色以下两句必须同时设置

  //style1.setFillPattern(HSSFCellStyle.SOLID_FOREGROUND);// 设置填充样式

  //short fcolor = color;

  if(color != HSSFColor.WHITE.index){

  style1.setFillForegroundColor(color);// 设置填充色

  }

  // 设置单元格上、下、左、右的边框线

  style1.setBorderBottom(HSSFCellStyle.BORDER_THIN);

  style1.setBorderLeft(HSSFCellStyle.BORDER_THIN);

  style1.setBorderRight(HSSFCellStyle.BORDER_THIN);

  style1.setBorderTop(HSSFCellStyle.BORDER_THIN);

  HSSFFont font1 = workbook.createFont();// 创建一个字体对象

  font1.setBoldweight(fontSize);// 设置字体的宽度

  font1.setFontHeightInPoints(fontSize);// 设置字体的高度

  font1.setBoldweight(HSSFFont.BOLDWEIGHT_BOLD);// 粗体显示

  style1.setFont(font1);// 设置style1的字体

  style1.setWrapText(true);// 设置自动换行

  style1.setAlignment(HSSFCellStyle.ALIGN_CENTER);// 设置单元格字体显示居中(左右方向)

  style1.setVerticalAlignment(HSSFCellStyle.VERTICAL_CENTER);// 设置单元格字体显示居中(上下方向)

  return style1;

  }

  /**

  *设置表头

  * @param sheet

  */

  public static void initTitleEX(SXSSFSheet sheet, CellStyle header,String title[],int titleLength[]) {

  SXSSFRow row0 = sheet.createRow(0);

  row0.setHeight((short) 800);

  for(int j = 0;j

  SXSSFCell cell = row0.createCell(j);

  //设置每一列的字段名

  cell.setCellValue(title[j]);

  cell.setCellStyle(header);

  sheet.setColumnWidth(j, titleLength[j]);

  }

  }

  }

  (5)新建一个Service接口;

  package com.twf.springcloud.ExportExcel.sevice;

  import javax.servlet.http.HttpServletRequest;

  import javax.servlet.http.HttpServletResponse;

  import org.springframework.http.ResponseEntity;

  public interface ExportService {

  ResponseEntity exportExcel(HttpServletRequest request, HttpServletResponse response);

  }

  (6)新建一个Service接口实现类;

  package com.twf.springcloud.ExportExcel.sevice.impl;

  import java.io.ByteArrayInputStream;

  import java.io.ByteArrayOutputStream;

  import java.io.IOException;

  import java.io.InputStream;

  import java.util.ArrayList;

  import java.util.List;

  import javax.servlet.http.HttpServletRequest;

  import javax.servlet.http.HttpServletResponse;

  import org.apache.poi.ss.usermodel.CellStyle;

  import org.apache.poi.xssf.streaming.SXSSFCell;

  import org.apache.poi.xssf.streaming.SXSSFRow;

  import org.apache.poi.xssf.streaming.SXSSFSheet;

  import org.apache.poi.xssf.streaming.SXSSFWorkbook;

  import org.slf4j.Logger;

  import org.slf4j.LoggerFactory;

  import org.springframework.http.ResponseEntity;

  import org.springframework.stereotype.Service;

  import com.twf.springcloud.ExportExcel.controller.BaseFrontController;

  import com.twf.springcloud.ExportExcel.po.User;

  import com.twf.springcloud.ExportExcel.sevice.ExportService;

  import com.twf.springcloud.ExportExcel.utils.ExcelFormatUtil;

  @Service

  public class ExportServiceImpl implements ExportService{

  Logger logger = LoggerFactory.getLogger(ExportServiceImpl.class);

  @Override

  public ResponseEntity exportExcel(HttpServletRequest request, HttpServletResponse response) {

  try {

  logger.info(">>>>>>>>>>开始导出excel>>>>>>>>>>");

  // 造几条数据

  List list = new ArrayList<>();

  list.add(new User("唐三藏", "男", 30, "13411111111", "东土大唐", "取西经"));

  list.add(new User("孙悟空", "男", 29, "13411111112", "菩提院", "打妖怪"));

  list.add(new User("猪八戒", "男", 28, "13411111113", "高老庄", "偷懒"));

  list.add(new User("沙悟净", "男", 27, "13411111114", "流沙河", "挑担子"));

  BaseFrontController baseFrontController = new BaseFrontController();

  return baseFrontController.buildResponseEntity(export((List) list), "用户表.xls");

  } catch (Exception e) {

  e.printStackTrace();

  logger.error(">>>>>>>>>>导出excel 异常,原因为:" + e.getMessage());

  }

  return null;

  }

  private InputStream export(List list) {

  logger.info(">>>>>>>>>>>>>>>>>>>>开始进入导出方法>>>>>>>>>>");

  ByteArrayOutputStream output = null;

  InputStream inputStream1 = null;

  SXSSFWorkbook wb = new SXSSFWorkbook(1000);// 保留1000条数据在内存中

  SXSSFSheet sheet = wb.createSheet();

  // 设置报表头样式

  CellStyle header = ExcelFormatUtil.headSytle(wb);// cell样式

  CellStyle content = ExcelFormatUtil.contentStyle(wb);// 报表体样式

  // 每一列字段名

  String[] strs = new String[] { "姓名", "性别", "年龄", "手机号", "地址","爱好" };

  // 字段名所在表格的宽度

  int[] ints = new int[] { 5000, 5000, 5000, 5000, 5000, 5000 };

  // 设置表头样式

  ExcelFormatUtil.initTitleEX(sheet, header, strs, ints);

  logger.info(">>>>>>>>>>>>>>>>>>>>表头样式设置完成>>>>>>>>>>");

  if (list != null && list.size() > 0) {

  logger.info(">>>>>>>>>>>>>>>>>>>>开始遍历数据组装单元格内容>>>>>>>>>>");

  for (int i = 0; i < list.size(); i++) {

  User user = list.get(i);

  SXSSFRow row = sheet.createRow(i + 1);

  int j = 0;

  SXSSFCell cell = row.createCell(j++);

  cell.setCellValue(user.getName()); // 姓名

  cell.setCellStyle(content);

  cell = row.createCell(j++);

  cell.setCellValue(user.getSex()); // 性别

  cell.setCellStyle(content);

  cell = row.createCell(j++);

  cell.setCellValue(user.getAge()); // 年龄

  cell.setCellStyle(content);

  cell = row.createCell(j++);

  cell.setCellValue(user.getPhoneNo()); // 手机号

  cell.setCellStyle(content);

  cell = row.createCell(j++);

  cell.setCellValue(user.getAddress()); // 地址

  cell.setCellStyle(content);

  cell = row.createCell(j++);

  cell.setCellValue(user.getHobby()); // 爱好

  cell.setCellStyle(content);

  }

  logger.info(">>>>>>>>>>>>>>>>>>>>结束遍历数据组装单元格内容>>>>>>>>>>");

  }无锡妇科费用 http://www.wxbhnkyy39.com/

  try {

  output = new ByteArrayOutputStream();

  wb.write(output);

  inputStream1 = new ByteArrayInputStream(output.toByteArray());

  output.flush();

  } catch (Exception e) {

  e.printStackTrace();

  } finally {

  try {

  if (output != null) {

  output.close();

  if (inputStream1 != null)

  inputStream1.close();

  }

  } catch (IOException e) {

  e.printStackTrace();

  }

  }

  return inputStream1;

  }

  }

  (7)新建一个下载文件的通用controller;

  package com.twf.springcloud.ExportExcel.controller;

  import java.io.InputStream;

  import java.net.URLEncoder;

  import java.util.HashMap;

  import java.util.Map;

  import org.apache.poi.util.IOUtils;

  import org.slf4j.Logger;

  import org.slf4j.LoggerFactory;

  import org.springframework.http.HttpHeaders;

  import org.springframework.http.HttpStatus;

  import org.springframework.http.ResponseEntity;

  import org.springframework.util.StringUtils;

  import org.springframework.validation.annotation.Validated;

  @Validated

  public class BaseFrontController {

  /**

  * slf4j 日志 logger

  */

  protected final Logger logger = LoggerFactory.getLogger(this.getClass());

  /**

  * 下载文件,纯SpringMVC的API来完成

  *

  * @param is 文件输入流

  * @param name 文件名称,带后缀名

  *

  * @throws Exception

  */

  public ResponseEntity buildResponseEntity(InputStream is, String name) throws Exception {

  logger.info(">>>>>>>>>>>>>>>>>>>>开始下载文件>>>>>>>>>>");

  if (this.logger.isDebugEnabled())

  this.logger.debug("download: " + name);

  HttpHeaders header = new HttpHeaders();

  String fileSuffix = name.substring(name.lastIndexOf('.') + 1);

  fileSuffix = fileSuffix.toLowerCase();

  Map arguments = new HashMap();

  arguments.put("xlsx", "application/vnd.openxmlformats-officedocument.spreadsheetml.sheet");

  arguments.put("xls", "application/vnd.ms-excel");

  String contentType = arguments.get(fileSuffix);

  header.add("Content-Type", (StringUtils.hasText(contentType) ? contentType : "application/x-download"));

  if(is!=null && is.available()!=0){

  header.add("Content-Length", String.valueOf(is.available()));

  header.add("Content-Disposition", "attachment;filename*=utf-8'zh_cn'" + URLEncoder.encode(name, "UTF-8"));

  byte[] bs = IOUtils.toByteArray(is);

  logger.info(">>>>>>>>>>>>>>>>>>>>结束下载文件-有记录>>>>>>>>>>");

  logger.info(">>>>>>>>>>结束导出excel>>>>>>>>>>");

  return new ResponseEntity<>(bs, header, HttpStatus.OK);

  }else{

  String string="数据为空";

  header.add("Content-Length", "0");

  header.add("Content-Disposition", "attachment;filename*=utf-8'zh_cn'" + URLEncoder.encode(name, "UTF-8"));

  logger.info(">>>>>>>>>>>>>>>>>>>>结束下载文件-无记录>>>>>>>>>>");

  logger.info(">>>>>>>>>>结束导出excel>>>>>>>>>>");

  return new ResponseEntity<>(string.getBytes(), header, HttpStatus.OK);

  }

  }

  }

  (8)新建一个controller,作为请求的入口;

  package com.twf.springcloud.ExportExcel.controller;

  import javax.servlet.http.HttpServletRequest;

  import javax.servlet.http.HttpServletResponse;

  import org.springframework.beans.factory.annotation.Autowired;

  import org.springframework.http.ResponseEntity;

  import org.springframework.web.bind.annotation.RequestMapping;

  import org.springframework.web.bind.annotation.RestController;

  import com.twf.springcloud.ExportExcel.sevice.ExportService;

  @RestController

  @RequestMapping("/exportExcel/")

  public class ExportController {

  @Autowired

  private ExportService exportService;

  // 导出excel

  @RequestMapping("exportExcel")

  public ResponseEntity exportExcel(HttpServletRequest request, HttpServletResponse response) {

  return exportService.exportExcel(request,response);

  }

  }

  (9)运行ExportExcelApplication,可以下载excel,打开,结束


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