最近项目需求中有需要导出Execl表格的要求，而且还是大量的数据，于是把之前的整理了一下，抽成了一个统一的工具类，需要时直接调用工具类即可，代码如下：
一、 先看下效果
二、 导入依赖
<properties>
<poi.version>4.1.2</poi.version>
<easypoi.version>3.2.0</easypoi.version>
</properties>
<!-- easypoi 改jar包，在单体项目没啥问题，但在微服务项目中出现问题，因此调用了下面三个，
大家如果解决了该问题可以告知一下互相学习-->
<!-- <dependency>-->
<!-- <groupId>cn.afterturn</groupId>-->
<!-- <artifactId>easypoi-base</artifactId>-->
<!-- <version>${easypoi.version}</version>-->
<!-- </dependency>-->
<!-- poi start -->
<dependency>
<groupId>org.apache.poi</groupId>
<artifactId>poi</artifactId>
<version>${poi.version}</version>
</dependency>
<dependency>
<groupId>org.apache.poi</groupId>
<artifactId>poi-ooxml</artifactId>
<version>${poi.version}</version>
</dependency>
<dependency>
<groupId>org.apache.poi</groupId>
<artifactId>poi-ooxml-schemas</artifactId>
<version>${poi.version}</version>
</dependency>
<!-- poi end -->
三、统一工具类
集成了xlsx和xls两种方式导出;
import org.apache.poi.hssf.usermodel.HSSFCellStyle;
import org.apache.poi.hssf.usermodel.HSSFFont;
import org.apache.poi.hssf.usermodel.HSSFPalette;
import org.apache.poi.hssf.usermodel.HSSFWorkbook;
import org.apache.poi.ss.usermodel.*;
import org.apache.poi.ss.util.CellRangeAddress;
import org.apache.poi.xssf.streaming.SXSSFWorkbook;
import org.apache.poi.xssf.usermodel.XSSFFont;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.stereotype.Component;
import javax.servlet.http.HttpServletResponse;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.OutputStream;
import java.lang.reflect.Method;
import java.net.URLEncoder;
import java.text.DecimalFormat;
import java.text.SimpleDateFormat;
import java.util.Date;
import java.util.List;
/**
* Exexl导出工具类
*/
public class ExcelExportUtil {
private static final Logger logger = LoggerFactory.getLogger(ExcelExportUtil.class);
//响应
HttpServletResponse response;
// 文件名
private String fileName;
//文件保存路径
private String fileDir;
//sheet名
private String sheetName;
//表头字体
private String titleFontType = "Arial Unicode MS";
//表头背景色
private String titleBackColor = "C1FBEE";
//表头字号
private short titleFontSize = 12;
//添加自动筛选的列 如 A:M
private String address = "";
//正文字体
private String contentFontType = "Arial Unicode MS";
//正文字号
private short contentFontSize = 12;
//Float类型数据小数位
private String floatDecimal = "0.00";
//Double类型数据小数位
private String doubleDecimal = "0.00";
//时间类型
private String parsePattern = "yyyy-MM-dd HH:mm:ss";
//设置列的公式
private String colFormula[] = null;
SimpleDateFormat dateFormat = new SimpleDateFormat(parsePattern);
DecimalFormat floatDecimalFormat = new DecimalFormat(floatDecimal);
DecimalFormat doubleDecimalFormat = new DecimalFormat(doubleDecimal);
private HSSFWorkbook workbook = null;
public ExcelExportUtil() {
workbook = new HSSFWorkbook();
}
public ExcelExportUtil(HttpServletResponse response, String fileName, String sheetName) {
this.fileName = fileName;
this.response = response;
this.sheetName = sheetName;
workbook = new HSSFWorkbook();
}
/**
* 设置表头字体.
* @param titleFontType
*/
public void setTitleFontType(String titleFontType) {
this.titleFontType = titleFontType;
}
/**
* 设置表头背景色.
* @param titleBackColor 十六进制
*/
public void setTitleBackColor(String titleBackColor) {
this.titleBackColor = titleBackColor;
}
/**
* 设置表头字体大小.
* @param titleFontSize
*/
public void setTitleFontSize(short titleFontSize) {
this.titleFontSize = titleFontSize;
}
/**
* 设置表头自动筛选栏位,如A:AC.
* @param address
*/
public void setAddress(String address) {
this.address = address;
}
/**
* 设置正文字体.
* @param contentFontType
*/
public void setContentFontType(String contentFontType) {
this.contentFontType = contentFontType;
}
/**
* 设置正文字号.
* @param contentFontSize
*/
public void setContentFontSize(short contentFontSize) {
this.contentFontSize = contentFontSize;
}
/**
* 设置float类型数据小数位 默认.00
* @param doubleDecimal 如 ".00"
*/
public void setDoubleDecimal(String doubleDecimal) {
this.doubleDecimal = doubleDecimal;
}
/**
* 设置doubel类型数据小数位 默认.00
* @param floatDecimalFormat 如 ".00
*/
public void setFloatDecimalFormat(DecimalFormat floatDecimalFormat) {
this.floatDecimalFormat = floatDecimalFormat;
}
/**
* 设置列的公式
* @param colFormula 存储i-1列的公式 涉及到的行号使用@替换 如A@+B@
*/
public void setColFormula(String[] colFormula) {
this.colFormula = colFormula;
}
/**
* 将16进制的颜色代码写入样式中来设置颜色
*
* @param style 保证style统一
* @param color 颜色：66FFDD
* @param index 索引 8-64 使用时不可重复
* @return
*/
public CellStyle setColor(CellStyle style, String color, short index) {
if ("".equals(color)) {
//转为RGB码
int r = Integer.parseInt((color.substring(0, 2)), 16); //转为16进制
int g = Integer.parseInt((color.substring(2, 4)), 16);
int b = Integer.parseInt((color.substring(4, 6)), 16);
//自定义cell颜色
HSSFPalette palette = workbook.getCustomPalette();
palette.setColorAtIndex((short) index, (byte) r, (byte) g, (byte) b);
style.setFillPattern(FillPatternType.SOLID_FOREGROUND);
style.setFillForegroundColor(index);
}
return style;
}
/**
* 设置字体并加外边框
*
* @param style 样式
* @param style 字体名
* @param style 大小
* @return
*/
public CellStyle setFontAndBorder(CellStyle style, String fontName, short size) {
HSSFFont font = workbook.createFont();
font.setFontHeightInPoints(size);
font.setFontName(fontName);
font.setBold(true);
style.setFont(font);
style.setBorderBottom(BorderStyle.THIN); //下边框
style.setBorderLeft(BorderStyle.THIN);//左边框
style.setBorderTop(BorderStyle.THIN);//上边框
style.setBorderRight(BorderStyle.THIN);//右边框
return style;
}
/**
* SXSSFWorkbook 设置表头字体加粗 和 大小
*/
public CellStyle setTitleNameFont(SXSSFWorkbook workbook, CellStyle style, String fontName, short size){
XSSFFont font = (XSSFFont) workbook.createFont();
font.setFontHeightInPoints(size);
font.setFontName(fontName);
font.setBold(true);
style.setFont(font);
return style;
}
/**
* xlsx方式(适合导出大量数据，拆分多个sheet)
* @param response 响应流
* @param fileName 文件名称
* @param titleColumn 标题列名称对象（如：name）
* @param titleName 标题列名称对象描述（如：名字）
* @param titleSize 标题大小
* @param dataList 数据源
*/
public void writeBigExcel(HttpServletResponse response, String fileName, String titleColumn[],
String titleName[], int titleSize[], List<?> dataList) {
try {
SXSSFWorkbook workbook = new SXSSFWorkbook(100);
OutputStream out = response.getOutputStream();
String lastFileName = fileName + ".xlsx";
response.setContentType("application/msexcel;charset=UTF-8");
response.setHeader("Content-Disposition", "attachment; filename="
+ URLEncoder.encode(lastFileName, "UTF-8"));
int k = 0;
int rowIndex;
Sheet sheet = workbook.createSheet(fileName + (k + 1));
//写入excel的表头
Row titleNameRow = workbook.getSheet(fileName + (k + 1)).createRow(0);
//设置样式
CellStyle titleStyle = workbook.createCellStyle();
titleStyle = setTitleNameFont(workbook, titleStyle, "Arial Unicode MS", (short) 12);
for (int i = 0; i < titleName.length; i++) {
sheet.setColumnWidth(i, titleSize[i] * 256); //设置宽度
Cell cell = titleNameRow.createCell(i);
cell.setCellStyle(titleStyle);
cell.setCellValue(titleName[i]);
}
//写入到excel中
if (dataList != null && dataList.size() > 0) {
if (titleColumn.length > 0) {
for (int index = 0; index < dataList.size(); index++) {
//每个sheet3W条数据
if (index != 0 && (index) % 30000 == 0) {
k = k + 1;
sheet = workbook.createSheet(fileName + (k + 1));
//写入excel的表头
titleNameRow = workbook.getSheet(fileName + (k + 1)).createRow(0);
for (int i = 0; i < titleName.length; i++) {
sheet.setColumnWidth(i, titleSize[i] * 256); //设置宽度
Cell cell = titleNameRow.createCell(i);
cell.setCellStyle(titleStyle);
cell.setCellValue(titleName[i]);
}
}
if (index < 30000) {
rowIndex = index + 1;
} else {
rowIndex = index - 30000 * ((index) / 30000) + 1;
}
Object obj = dataList.get(index);
Class clazz = obj.getClass();
Row dataRow = workbook.getSheet(fileName + (k + 1)).createRow(rowIndex);
for (int columnIndex = 0; columnIndex < titleColumn.length; columnIndex++) {
String title = titleColumn[columnIndex].trim();
if (!"".equals(title)) {
// 获取返回类型
String UTitle = Character.toUpperCase(title.charAt(0)) + title.substring(1, title.length()); // 使其首字母大写;
String methodName = "get" + UTitle;
Method method = clazz.getDeclaredMethod(methodName);
String returnType = method.getReturnType().getName();
Object object = method.invoke(obj);
String data = method.invoke(obj) == null ? "" : object.toString();
Cell cell = dataRow.createCell(columnIndex);
if (data != null && !"".equals(data)) {
if ("int".equals(returnType)) {
cell.setCellValue(Integer.parseInt(data));
} else if ("long".equals(returnType)) {
cell.setCellValue(Long.parseLong(data));
} else if ("float".equals(returnType)) {
cell.setCellValue(floatDecimalFormat.format(Float.parseFloat(data)));
} else if ("double".equals(returnType)) {
cell.setCellValue(doubleDecimalFormat.format(Double.parseDouble(data)));
} else if (Date.class.getName().equals(returnType)) {
cell.setCellValue(dateFormat.format(object));
} else {
cell.setCellValue(data);
}
} else { //字段为空 检查该列是否是公式
if (colFormula != null) {
String sixBuf = colFormula[columnIndex].replace("@", (rowIndex + 1) + "");
cell = dataRow.createCell(columnIndex);
cell.setCellFormula(sixBuf);
}
}
}
}
}
}else{
//titleColumn为空 titleName为单列的情况
for (int index = 0; index < dataList.size(); index++) {
//每个sheet3W条数据
if (index != 0 && (index) % 30000 == 0) {
k = k + 1;
sheet = workbook.createSheet(fileName + (k + 1));
//写入excel的表头
titleNameRow = workbook.getSheet(fileName + (k + 1)).createRow(0);
for (int i = 0; i < titleName.length; i++) {
sheet.setColumnWidth(i, titleSize[i] * 256); //设置宽度
Cell cell = titleNameRow.createCell(i);
cell.setCellStyle(titleStyle);
cell.setCellValue(titleName[i]);
}
}
if (index < 30000) {
rowIndex = index + 1;
} else {
rowIndex = index - 30000 * ((index) / 30000) + 1;
}
Object obj = dataList.get(index);
Row dataRow = workbook.getSheet(fileName + (k + 1)).createRow(rowIndex);
Cell cell = dataRow.createCell(0);
cell.setCellValue(obj.toString());
}
}
}
workbook.write(out);
out.flush();
out.close();
} catch (Exception e) {
e.printStackTrace();
}
}
/**
* 写excel.
* xls方式
* @param titleColumn 对应bean的属性名
* @param titleName excel要导出的列名
* @param titleSize 列宽
* @param dataList 数据
*/
public void writeExcel(String titleColumn[], String titleName[], int titleSize[], List<?> dataList) {
//添加Worksheet（不添加sheet时生成的xls文件打开时会报错)
Sheet sheet = workbook.createSheet(this.sheetName);
//新建文件
OutputStream out = null;
try {
if (fileDir != null) {
//有文件路径
out = new FileOutputStream(fileDir);
} else {
//否则，直接写到输出流中
out = response.getOutputStream();
fileName = fileName + ".xls";
response.setContentType("application/msexcel;charset=UTF-8");
response.setHeader("Content-Disposition", "attachment; filename="
+ URLEncoder.encode(fileName, "UTF-8"));
}
//写入excel的表头
Row titleNameRow = workbook.getSheet(sheetName).createRow(0);
//设置样式
CellStyle titleStyle = workbook.createCellStyle();
titleStyle = (HSSFCellStyle) setFontAndBorder(titleStyle, titleFontType, (short) titleFontSize);
titleStyle = (HSSFCellStyle) setColor(titleStyle, titleBackColor, (short) 10);
for (int i = 0; i < titleName.length; i++) {
sheet.setColumnWidth(i, titleSize[i] * 256); //设置宽度
Cell cell = titleNameRow.createCell(i);
cell.setCellStyle(titleStyle);
cell.setCellValue(titleName[i].toString());
}
//为表头添加自动筛选
if (!"".equals(address)) {
CellRangeAddress c = (CellRangeAddress) CellRangeAddress.valueOf(address);
sheet.setAutoFilter(c);
}
//通过反射获取数据并写入到excel中
if (dataList != null && dataList.size() > 0) {
//设置样式
HSSFCellStyle dataStyle = workbook.createCellStyle();
titleStyle = (HSSFCellStyle) setFontAndBorder(titleStyle, contentFontType, (short) contentFontSize);
if (titleColumn.length > 0) {
for (int rowIndex = 1; rowIndex <= dataList.size(); rowIndex++) {
Object obj = dataList.get(rowIndex - 1); //获得该对象
Class clsss = obj.getClass(); //获得该对对象的class实例
Row dataRow = workbook.getSheet(sheetName).createRow(rowIndex);
for (int columnIndex = 0; columnIndex < titleColumn.length; columnIndex++) {
String title = titleColumn[columnIndex].toString().trim();
if (!"".equals(title)) { //字段不为空
//使首字母大写
String UTitle = Character.toUpperCase(title.charAt(0)) + title.substring(1, title.length()); // 使其首字母大写;
String methodName = "get" + UTitle;
// 设置要执行的方法
Method method = clsss.getDeclaredMethod(methodName);
//获取返回类型
String returnType = method.getReturnType().getName();
Object object = method.invoke(obj);
String data = method.invoke(obj) == null ? "" : object.toString();
Cell cell = dataRow.createCell(columnIndex);
if (data != null && !"".equals(data)) {
if ("int".equals(returnType)) {
cell.setCellValue(Integer.parseInt(data));
} else if ("long".equals(returnType)) {
cell.setCellValue(Long.parseLong(data));
} else if ("float".equals(returnType)) {
cell.setCellValue(floatDecimalFormat.format(Float.parseFloat(data)));
} else if ("double".equals(returnType)) {
cell.setCellValue(doubleDecimalFormat.format(Double.parseDouble(data)));
} else if (Date.class.getName().equals(returnType)) {
cell.setCellValue(new SimpleDateFormat("yyyy-MM-dd HH:mm:ss").format(object));
} else {
cell.setCellValue(data);
}
}
} else { //字段为空 检查该列是否是公式
if (colFormula != null) {
String sixBuf = colFormula[columnIndex].replace("@", (rowIndex + 1) + "");
Cell cell = dataRow.createCell(columnIndex);
cell.setCellFormula(sixBuf);
}
}
}
}
}
}
workbook.write(out);
} catch (Exception e) {
e.printStackTrace();
} finally {
if (out != null) {
try {
out.close();
} catch (IOException e) {
logger.debug("导出写Excel异常");
}
}
}
}
}
四、调用
此处我没写成static静态方法调用
@RequestMapping("/export")
public void export(HttpServletResponse response) {
List<Object> dataList = new ArrayList<>();
User user1 = new User("张三", 23, "男", 173);
User user2 = new User("李四", 20, "男", 183);
User user3 = new User("王五", 25, "男", 165);
User user4 = new User("小花", 18, "女", 165);
dataList.add(user1);
dataList.add(user2);
dataList.add(user3);
dataList.add(user4);
List<String> list = new ArrayList<>();
list.add("张三");
list.add("李四");
list.add("王五");
try {
//导出xlsx格式
ExcelExportUtil excelExport1 = new ExcelExportUtil();
excelExport1.writeBigExcel(response, "用户信息导出数据1", new String[]{"name", "age", "sex", "height"}
, new String[]{"姓名", "年龄", "性别", "身高"}
, new int[]{30, 30, 30, 30}, dataList);
//导出xsl格式
// ExcelExportUtil excelExport2 = new ExcelExportUtil(response, "用户信息导出数据2", "sheet1");
// excelExport2.writeExcel(new String[]{"name", "age", "sex", "height"}
// , new String[]{"姓名", "年龄", "性别", "身高"}
// , new int[]{30, 30, 30, 30}, dataList);
//单列的导出
// ExcelExportUtil excelExport3 = new ExcelExportUtil();
// excelExport3.writeBigExcel(response, "测试", new String[]{}
// , new String[]{"报警信息"}
// , new int[]{30}, list);
} catch (Exception e) {
e.printStackTrace();
}
}