java实现导出Excel的功能
這篇文章主要為大家詳細介紹了java實現導出Excel的功能，具有一定的參考價值，感興趣的小伙伴們可以參考一下
導出excel是咱Java開發的必備技能啦，之前項目有這個功能，現在將其獨立出來，分享一下。
所用技術就是SpringBoot，然后是MVC架構模式。
廢話不多說，直接上代碼了，源碼點末尾鏈接就可以下載。
（1）新建一個SpringBoot項目（可以官網https://start.spring.io/直接生成下載，然后導入eclipse），項目結構如下：
（2）修改pom文件，添加依賴；
| 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 | <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> ?<!-- 導出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）新建一個實體類，命名為User.java；
| 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 | 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; // 性別 ?private Integer age; // 年齡 ?private String phoneNo; // 手機號 ?private String address; // 地址 ?private String hobby; // 愛好 ?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）新建一個excel樣式工具類；
| 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 | 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樣式工具類 ?*/ public class ExcelFormatUtil { ?/** ?* 設置報表頭樣式 ?* @param workbook ?* @return ?*/ ?public static CellStyle headSytle(SXSSFWorkbook workbook){ ?// 設置style1的樣式，此樣式運用在第二行 ?CellStyle style1 = workbook.createCellStyle();// cell樣式 ?// 設置單元格背景色，設置單元格背景色以下兩句必須同時設置 ?style1.setFillPattern(HSSFCellStyle.SOLID_FOREGROUND);// 設置填充樣式 ?style1.setFillForegroundColor(HSSFColor.GREY_25_PERCENT.index);// 設置填充色 ?// 設置單元格上、下、左、右的邊框線 ?style1.setBorderBottom(HSSFCellStyle.BORDER_THIN); ?style1.setBorderLeft(HSSFCellStyle.BORDER_THIN); ?style1.setBorderRight(HSSFCellStyle.BORDER_THIN); ?style1.setBorderTop(HSSFCellStyle.BORDER_THIN); ?Font font1 = workbook.createFont();// 創建一個字體對象 ?font1.setBoldweight((short) 10);// 設置字體的寬度 ?font1.setFontHeightInPoints((short) 10);// 設置字體的高度 ?font1.setBoldweight(HSSFFont.BOLDWEIGHT_BOLD);// 粗體顯示 ?style1.setFont(font1);// 設置style1的字體 ?style1.setWrapText(true);// 設置自動換行 ?style1.setAlignment(HSSFCellStyle.ALIGN_CENTER);// 設置單元格字體顯示居中（左右方向） ?style1.setVerticalAlignment(HSSFCellStyle.VERTICAL_CENTER);// 設置單元格字體顯示居中(上下方向) ?return style1; ?} ?/** ?* 設置報表體樣式 ?* @param wb ?* @return ?*/ ?public static CellStyle contentStyle(SXSSFWorkbook wb){ ?// 設置style1的樣式，此樣式運用在第二行 ?CellStyle style1 = wb.createCellStyle();// cell樣式 ?// 設置單元格上、下、左、右的邊框線 ?style1.setBorderBottom(HSSFCellStyle.BORDER_THIN); ?style1.setBorderLeft(HSSFCellStyle.BORDER_THIN); ?style1.setBorderRight(HSSFCellStyle.BORDER_THIN); ?style1.setBorderTop(HSSFCellStyle.BORDER_THIN); ?style1.setWrapText(true);// 設置自動換行 ?style1.setAlignment(HSSFCellStyle.ALIGN_LEFT);// 設置單元格字體顯示居中（左右方向） ?style1.setVerticalAlignment(HSSFCellStyle.VERTICAL_CENTER);// 設置單元格字體顯示居中(上下方向) ?return style1; ?} ?/** ?* 設置報表標題樣式 ?* @param workbook ?* @return ?*/ ?public static HSSFCellStyle titleSytle(HSSFWorkbook workbook,short color,short fontSize){ ?// 設置style1的樣式，此樣式運用在第二行 ?HSSFCellStyle style1 = workbook.createCellStyle();// cell樣式 ?// 設置單元格背景色，設置單元格背景色以下兩句必須同時設置 ?//style1.setFillPattern(HSSFCellStyle.SOLID_FOREGROUND);// 設置填充樣式 ?//short fcolor = color; ?if(color != HSSFColor.WHITE.index){ ?style1.setFillForegroundColor(color);// 設置填充色 ?} ?// 設置單元格上、下、左、右的邊框線 ?style1.setBorderBottom(HSSFCellStyle.BORDER_THIN); ?style1.setBorderLeft(HSSFCellStyle.BORDER_THIN); ?style1.setBorderRight(HSSFCellStyle.BORDER_THIN); ?style1.setBorderTop(HSSFCellStyle.BORDER_THIN); ?HSSFFont font1 = workbook.createFont();// 創建一個字體對象 ?font1.setBoldweight(fontSize);// 設置字體的寬度 ?font1.setFontHeightInPoints(fontSize);// 設置字體的高度 ?font1.setBoldweight(HSSFFont.BOLDWEIGHT_BOLD);// 粗體顯示 ?style1.setFont(font1);// 設置style1的字體 ?style1.setWrapText(true);// 設置自動換行 ?style1.setAlignment(HSSFCellStyle.ALIGN_CENTER);// 設置單元格字體顯示居中（左右方向） ?style1.setVerticalAlignment(HSSFCellStyle.VERTICAL_CENTER);// 設置單元格字體顯示居中(上下方向) ?return style1; ?} ?/** ?*設置表頭 ?* @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); ?//設置每一列的字段名 ?cell.setCellValue(title[j]); ?cell.setCellStyle(header); ?sheet.setColumnWidth(j, titleLength[j]); ?} ?} } |
（5）新建一個Service接口；
| 1 2 3 4 5 6 7 | 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）新建一個Service接口實現類；
| 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 | 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(">>>>>>>>>>開始導出excel>>>>>>>>>>"); ?? ?// 造幾條數據 ?List<User> list = new ArrayList<>(); ?list.add(new User("唐三藏", "男", 30, "13411111111", "東土大唐", "取西經")); ?list.add(new User("孫悟空", "男", 29, "13411111112", "菩提院", "打妖怪")); ?list.add(new User("豬八戒", "男", 28, "13411111113", "高老莊", "偷懶")); ?list.add(new User("沙悟凈", "男", 27, "13411111114", "流沙河", "挑擔子")); ?? ?BaseFrontController baseFrontController = new BaseFrontController(); ?return baseFrontController.buildResponseEntity(export((List<User>) list), "用戶表.xls"); ?} catch (Exception e) { ?e.printStackTrace(); ?logger.error(">>>>>>>>>>導出excel 異常，原因為：" + e.getMessage()); ?} ?return null; ?} ?private InputStream export(List<User> list) { ?logger.info(">>>>>>>>>>>>>>>>>>>>開始進入導出方法>>>>>>>>>>"); ?ByteArrayOutputStream output = null; ?InputStream inputStream1 = null; ?SXSSFWorkbook wb = new SXSSFWorkbook(1000);// 保留1000條數據在內存中 ?SXSSFSheet sheet = wb.createSheet(); ?// 設置報表頭樣式 ?CellStyle header = ExcelFormatUtil.headSytle(wb);// cell樣式 ?CellStyle content = ExcelFormatUtil.contentStyle(wb);// 報表體樣式 ?? ?// 每一列字段名 ?String[] strs = new String[] { "姓名", "性別", "年齡", "手機號", "地址","愛好" }; ?? ?// 字段名所在表格的寬度 ?int[] ints = new int[] { 5000, 5000, 5000, 5000, 5000, 5000 }; ?? ?// 設置表頭樣式 ?ExcelFormatUtil.initTitleEX(sheet, header, strs, ints); ?logger.info(">>>>>>>>>>>>>>>>>>>>表頭樣式設置完成>>>>>>>>>>"); ?? ?if (list != null && list.size() > 0) { ?logger.info(">>>>>>>>>>>>>>>>>>>>開始遍歷數據組裝單元格內容>>>>>>>>>>"); ?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()); // 性別 ?cell.setCellStyle(content); ?cell = row.createCell(j++); ?cell.setCellValue(user.getAge()); // 年齡 ?cell.setCellStyle(content); ?cell = row.createCell(j++); ?cell.setCellValue(user.getPhoneNo()); // 手機號 ?cell.setCellStyle(content); ?cell = row.createCell(j++); ?cell.setCellValue(user.getAddress()); // 地址 ?cell.setCellStyle(content); ?? ?cell = row.createCell(j++); ?cell.setCellValue(user.getHobby()); // 愛好 ?cell.setCellStyle(content); ?} ?logger.info(">>>>>>>>>>>>>>>>>>>>結束遍歷數據組裝單元格內容>>>>>>>>>>"); ?} ?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）新建一個下載文件的通用controller；
| 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 | 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()); ?/** ?* 下載文件,純SpringMVC的API來完成 ?* ?* @param is 文件輸入流 ?* @param name 文件名稱,帶后綴名 ?* ?* @throws Exception ?*/ ?public ResponseEntity<byte[]> buildResponseEntity(InputStream is, String name) throws Exception { ?logger.info(">>>>>>>>>>>>>>>>>>>>開始下載文件>>>>>>>>>>"); ?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(">>>>>>>>>>>>>>>>>>>>結束下載文件-有記錄>>>>>>>>>>"); ?logger.info(">>>>>>>>>>結束導出excel>>>>>>>>>>"); ?return new ResponseEntity<>(bs, header, HttpStatus.OK); ?}else{ ?String string="數據為空"; ?header.add("Content-Length", "0"); ?header.add("Content-Disposition", "attachment;filename*=utf-8'zh_cn'" + URLEncoder.encode(name, "UTF-8")); ?logger.info(">>>>>>>>>>>>>>>>>>>>結束下載文件-無記錄>>>>>>>>>>"); ?logger.info(">>>>>>>>>>結束導出excel>>>>>>>>>>"); ?return new ResponseEntity<>(string.getBytes(), header, HttpStatus.OK); ?} ?} } |
（8）新建一個controller，作為請求的入口；
| 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 | 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; ?// 導出excel ?@RequestMapping("exportExcel") ?public ResponseEntity<byte[]> exportExcel(HttpServletRequest request, HttpServletResponse response) { ?return exportService.exportExcel(request,response); ?} } |
（9）運行ExportExcelApplication，瀏覽器訪問http://localhost:8080/exportExcel/exportExcel，可以下載excel，打開如下：
（10）項目源碼
以上就是本文的全部內容，希望對大家的學習有所幫助，也希望大家多多支持腳本之家。
來源：https://www.jb51.net/article/161337.htm
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