这篇文章主要为大家详细介绍了java实现导出Excel的功能,具有一定的参考价值,感兴趣的小伙伴们可以参考一下

导出excel是咱Java开发的必备技能啦,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(可以官网https://start.spring.io/直接生成下载,然后导入eclipse),项目结构如下:

(2)修改pom文件,添加依赖;

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<dependency>

 <groupId>org.springframework.boot</groupId>

 <artifactId>spring-boot-starter-web</artifactId>

 </dependency>

 <dependency>

 <groupId>org.springframework.boot</groupId>

 <artifactId>spring-boot-starter-test</artifactId>

 <scope>test</scope>

 </dependency>

 <!-- 导出excel -->

 <dependency>

 <groupId>org.apache.poi</groupId>

 <artifactId>poi</artifactId>

 <version>3.14</version>

 </dependency>

 <!-- https://mvnrepository.com/artifact/org.apache.poi/poi-ooxml -->

 <dependency>

 <groupId>org.apache.poi</groupId>

 <artifactId>poi-ooxml</artifactId>

 <version>3.14</version>

 </dependency>

 <!-- https://mvnrepository.com/artifact/org.apache.poi/poi-contrib -->

 <dependency>

 <groupId>org.apache.poi</groupId>

 <artifactId>poi-contrib</artifactId>

 <version>3.6</version>

 </dependency>

 <!-- https://mvnrepository.com/artifact/org.apache.poi/poi-ooxml-schemas -->

 <dependency>

 <groupId>org.apache.poi</groupId>

 <artifactId>poi-ooxml-schemas</artifactId>

 <version>3.17</version>

 </dependency>

 <!-- https://mvnrepository.com/artifact/org.apache.poi/poi-scratchpad -->

 <dependency>

 <groupId>org.apache.poi</groupId>

 <artifactId>poi-scratchpad</artifactId>

 <version>3.17</version>

 </dependency>

(3)新建一个实体类,命名为User.java;

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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;

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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<title.length; 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;

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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<byte[]> exportExcel(HttpServletRequest request, HttpServletResponse response);

}

(6)新建一个Service接口实现类;

Java技术迷

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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<byte[]> exportExcel(HttpServletRequest request, HttpServletResponse response) {

 try {

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

  

 // 造几条数据

 List<User> 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<User>) 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<User> 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>>>>>>>>>>");

 }

 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;

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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<byte[]> 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<String, String> arguments = new HashMap<String, String>();

 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;

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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<byte[]> exportExcel(HttpServletRequest request, HttpServletResponse response) {

 return exportService.exportExcel(request,response);

 }

}

(9)运行ExportExcelApplication,浏览器访问http://localhost:8080/exportExcel/exportExcel,可以下载excel,打开如下:

(10)项目源码

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。

来源:https://www.jb51.net/article/161337.htm

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