Java导出Excel实例操作

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。

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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：

(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