Java导出Excel(附完整源码)

Java导出Excel(附完整源码)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;&lt…

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:
在这里插入图片描述
(2)修改pom文件,添加依赖;

<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;

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<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;

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;

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;

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;

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:
在这里插入图片描述
(10)项目源码,提取码为:wvfm。

今天的文章Java导出Excel(附完整源码)分享到此就结束了,感谢您的阅读,如果确实帮到您,您可以动动手指转发给其他人。

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