怎么在java項(xiàng)目中導(dǎo)出Excel文件
怎么在java項(xiàng)目中導(dǎo)出Excel文件？很多新手對(duì)此不是很清楚，為了幫助大家解決這個(gè)難題，下面小編將為大家詳細(xì)講解，有這方面需求的人可以來學(xué)習(xí)下，希望你能有所收獲。
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項(xiàng)目結(jié)構(gòu)如下：
修改pom文件，添加依賴；
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
新建一個(gè)實(shí)體類，命名為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; // 性別
private Integer age; // 年齡
private String phoneNo; // 手機(jī)號(hào)
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 + "]";
}
}新建一個(gè)excel樣式工具類；
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(shè)置報(bào)表頭樣式
* @param workbook
* @return
*/
public static CellStyle headSytle(SXSSFWorkbook workbook){
// 設(shè)置style1的樣式，此樣式運(yùn)用在第二行
CellStyle style1 = workbook.createCellStyle();// cell樣式
// 設(shè)置單元格背景色，設(shè)置單元格背景色以下兩句必須同時(shí)設(shè)置
style1.setFillPattern(HSSFCellStyle.SOLID_FOREGROUND);// 設(shè)置填充樣式
style1.setFillForegroundColor(HSSFColor.GREY_25_PERCENT.index);// 設(shè)置填充色
// 設(shè)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(chuàng)建一個(gè)字體對(duì)象
font1.setBoldweight((short) 10);// 設(shè)置字體的寬度
font1.setFontHeightInPoints((short) 10);// 設(shè)置字體的高度
font1.setBoldweight(HSSFFont.BOLDWEIGHT_BOLD);// 粗體顯示
style1.setFont(font1);// 設(shè)置style1的字體
style1.setWrapText(true);// 設(shè)置自動(dòng)換行
style1.setAlignment(HSSFCellStyle.ALIGN_CENTER);// 設(shè)置單元格字體顯示居中（左右方向）
style1.setVerticalAlignment(HSSFCellStyle.VERTICAL_CENTER);// 設(shè)置單元格字體顯示居中(上下方向)
return style1;
}
/**
* 設(shè)置報(bào)表體樣式
* @param wb
* @return
*/
public static CellStyle contentStyle(SXSSFWorkbook wb){
// 設(shè)置style1的樣式，此樣式運(yùn)用在第二行
CellStyle style1 = wb.createCellStyle();// cell樣式
// 設(shè)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(shè)置自動(dòng)換行
style1.setAlignment(HSSFCellStyle.ALIGN_LEFT);// 設(shè)置單元格字體顯示居中（左右方向）
style1.setVerticalAlignment(HSSFCellStyle.VERTICAL_CENTER);// 設(shè)置單元格字體顯示居中(上下方向)
return style1;
}
/**
* 設(shè)置報(bào)表標(biāo)題樣式
* @param workbook
* @return
*/
public static HSSFCellStyle titleSytle(HSSFWorkbook workbook,short color,short fontSize){
// 設(shè)置style1的樣式，此樣式運(yùn)用在第二行
HSSFCellStyle style1 = workbook.createCellStyle();// cell樣式
// 設(shè)置單元格背景色，設(shè)置單元格背景色以下兩句必須同時(shí)設(shè)置
//style1.setFillPattern(HSSFCellStyle.SOLID_FOREGROUND);// 設(shè)置填充樣式
//short fcolor = color;
if(color != HSSFColor.WHITE.index){
style1.setFillForegroundColor(color);// 設(shè)置填充色
}
// 設(shè)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(chuàng)建一個(gè)字體對(duì)象
font1.setBoldweight(fontSize);// 設(shè)置字體的寬度
font1.setFontHeightInPoints(fontSize);// 設(shè)置字體的高度
font1.setBoldweight(HSSFFont.BOLDWEIGHT_BOLD);// 粗體顯示
style1.setFont(font1);// 設(shè)置style1的字體
style1.setWrapText(true);// 設(shè)置自動(dòng)換行
style1.setAlignment(HSSFCellStyle.ALIGN_CENTER);// 設(shè)置單元格字體顯示居中（左右方向）
style1.setVerticalAlignment(HSSFCellStyle.VERTICAL_CENTER);// 設(shè)置單元格字體顯示居中(上下方向)
return style1;
}
/**
*設(shè)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新建一個(gè)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);
} 新建一個(gè)Service接口實(shí)現(xiàn)類；
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(">>>>>>>>>>開始導(dǎo)出excel>>>>>>>>>>");
// 造幾條數(shù)據(jù)
List list = new ArrayList<>();
list.add(new User("唐三藏", "男", 30, "13411111111", "東土大唐", "取西經(jīng)"));
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(dān)子"));
BaseFrontController baseFrontController = new BaseFrontController();
return baseFrontController.buildResponseEntity(export((List) list), "用戶表.xls");
} catch (Exception e) {
e.printStackTrace();
logger.error(">>>>>>>>>>導(dǎo)出excel 異常，原因?yàn)椋? + e.getMessage());
}
return null;
}
private InputStream export(List list) {
logger.info(">>>>>>>>>>>>>>>>>>>>開始進(jìn)入導(dǎo)出方法>>>>>>>>>>");
ByteArrayOutputStream output = null;
InputStream inputStream1 = null;
SXSSFWorkbook wb = new SXSSFWorkbook(1000);// 保留1000條數(shù)據(jù)在內(nèi)存中
SXSSFSheet sheet = wb.createSheet();
// 設(shè)置報(bào)表頭樣式
CellStyle header = ExcelFormatUtil.headSytle(wb);// cell樣式
CellStyle content = ExcelFormatUtil.contentStyle(wb);// 報(bào)表體樣式
// 每一列字段名
String[] strs = new String[] { "姓名", "性別", "年齡", "手機(jī)號(hào)", "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(shè)置表頭樣式
ExcelFormatUtil.initTitleEX(sheet, header, strs, ints);
logger.info(">>>>>>>>>>>>>>>>>>>>表頭樣式設(shè)置完成>>>>>>>>>>");
if (list != null && list.size() > 0) {
logger.info(">>>>>>>>>>>>>>>>>>>>開始遍歷數(shù)據(jù)組裝單元格內(nèi)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(jī)號(hào)
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(jié)束遍歷數(shù)據(jù)組裝單元格內(nèi)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;
}
} 新建一個(gè)下載文件的通用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 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 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(">>>>>>>>>>>>>>>>>>>>結(jié)束下載文件-有記錄>>>>>>>>>>");
logger.info(">>>>>>>>>>結(jié)束導(dǎo)出excel>>>>>>>>>>");
return new ResponseEntity<>(bs, header, HttpStatus.OK);
}else{
String string="數(shù)據(jù)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(jié)束下載文件-無記錄>>>>>>>>>>");
logger.info(">>>>>>>>>>結(jié)束導(dǎo)出excel>>>>>>>>>>");
return new ResponseEntity<>(string.getBytes(), header, HttpStatus.OK);
}
}
} 新建一個(gè)controller，作為請(qǐng)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;
// 導(dǎo)出excel
@RequestMapping("exportExcel")
public ResponseEntity exportExcel(HttpServletRequest request, HttpServletResponse response) {
return exportService.exportExcel(request,response);
}
} （9）運(yùn)行ExportExcelApplication，瀏覽器訪問http://localhost:8080/exportExcel/exportExcel，可以下載excel，打開如下：
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