记录一下
效果
一、引入依赖
<dependency>
<groupId>cn.afterturn</groupId>
<artifactId>easypoi-spring-boot-starter</artifactId>
<version>4.1.3</version>
</dependency>
二、实体类
import cn.afterturn.easypoi.excel.annotation.Excel;
import cn.afterturn.easypoi.excel.annotation.ExcelCollection;
import lombok.Data;
import java.util.List;
@Data
public class TestExportMainVo {
@Excel(name = "项目",width = 20,needMerge = true)
private String project;
@ExcelCollection(name = "")
private List<TestExportSub1Vo> sub1VoList;
public TestExportMainVo(String project, List<TestExportSub1Vo> sub1VoList) {
this.project = project;
this.sub1VoList = sub1VoList;
}
}
@Data
public class TestExportSub1Vo {
@Excel(name = "序号",width = 8,needMerge = true)
private String sort;
@Excel(name = "依据",width = 30,needMerge = true)
private String basis;
@ExcelCollection(name = "")
private List<TestExportSub2Vo> sub2VoList;
public TestExportSub1Vo(String sort, String basis, List<TestExportSub2Vo> sub2VoList) {
this.sort = sort;
this.basis = basis;
this.sub2VoList = sub2VoList;
}
}
@Data
public class TestExportSub2Vo {
@Excel(name = "操作步骤",width = 60)
private String step;
@Excel(name = "条款",width = 12)
private String clause;
public TestExportSub2Vo(String step, String clause) {
this.step = step;
this.clause = clause;
}
}
@Excel注解中，needMerge =true 用于合并单元格
三、excel工具类
1、样式工具类 ExcelExportStylerUitl
import cn.afterturn.easypoi.excel.entity.params.ExcelExportEntity;
import cn.afterturn.easypoi.excel.entity.params.ExcelForEachParams;
import cn.afterturn.easypoi.excel.export.styler.IExcelExportStyler;
import org.apache.poi.ss.usermodel.*;
/**
* @author fuHua
* @date 2021年05月27日 14:55
*/
public class ExcelExportStylerUitl implements IExcelExportStyler {
private static final short STRING_FORMAT = (short) BuiltinFormats.getBuiltinFormat("TEXT");
private static final short FONT_SIZE_TEN = 10;
private static final short FONT_SIZE_ELEVEN = 11;
private static final short FONT_SIZE_TWELVE = 12;
/**
* 大标题样式
*/
private CellStyle headerStyle;
/**
* 每列标题样式
*/
private CellStyle titleStyle;
/**
* 数据行样式
*/
private CellStyle styles;
public ExcelExportStylerUitl(Workbook workbook) {
this.init(workbook);
}
/**
* 初始化样式
* @param workbook
*/
private void init(Workbook workbook) {
this.headerStyle = initHeaderStyle(workbook);
this.titleStyle = initTitleStyle(workbook);
this.styles = initStyles(workbook);
}
/**
* 大标题样式
* @param color
* @return
*/
@Override
public CellStyle getHeaderStyle(short color) {
return headerStyle;
}
/**
* 每列标题样式
* @param color
* @return
*/
@Override
public CellStyle getTitleStyle(short color) {
return titleStyle;
}
/**
* 数据行样式
* @param parity 可以用来表示奇偶行
* @param entity 数据内容
* @return 样式
*/
@Override
public CellStyle getStyles(boolean parity, ExcelExportEntity entity) {
return styles;
}
/**
* 获取样式方法
* @param dataRow 数据行
* @param obj 对象
* @param data 数据
*/
@Override
public CellStyle getStyles(Cell cell, int dataRow, ExcelExportEntity entity, Object obj, Object data) {
return getStyles(true, entity);
}
/**
* 模板使用的样式设置
*/
@Override
public CellStyle getTemplateStyles(boolean isSingle, ExcelForEachParams excelForEachParams) {
return null;
}
/**
* 初始化--大标题样式
* @param workbook
* @return
*/
private CellStyle initHeaderStyle(Workbook workbook) {
CellStyle style = getBaseCellStyle(workbook);
style.setFont(getFont(workbook, (short) 14, true));
return style;
}
/**
* 初始化--每列标题样式
* @param workbook
* @return
*/
private CellStyle initTitleStyle(Workbook workbook) {
CellStyle style = getBaseCellStyle(workbook);
style.setFont(getFont(workbook, FONT_SIZE_TWELVE, true));
//背景色
// style.setFillForegroundColor(IndexedColors.GREY_25_PERCENT.getIndex());
style.setFillPattern(FillPatternType.SOLID_FOREGROUND);
return style;
}
/**
* 初始化--数据行样式
* @param workbook
* @return
*/
private CellStyle initStyles(Workbook workbook) {
CellStyle style = getBaseCellStyle(workbook);
style.setFont(getFont(workbook, FONT_SIZE_ELEVEN, false));
style.setDataFormat(STRING_FORMAT);
return style;
}
/**
* 基础样式
* @return
*/
private CellStyle getBaseCellStyle(Workbook workbook) {
CellStyle style = workbook.createCellStyle();
//下边框
style.setBorderBottom(BorderStyle.THIN);
//左边框
style.setBorderLeft(BorderStyle.THIN);
//上边框
style.setBorderTop(BorderStyle.THIN);
//右边框
style.setBorderRight(BorderStyle.THIN);
//水平居中
style.setAlignment(HorizontalAlignment.CENTER);
//上下居中
style.setVerticalAlignment(VerticalAlignment.CENTER);
//设置自动换行
style.setWrapText(true);
return style;
}
/**
* 字体样式
* @param size 字体大小
* @param isBold 是否加粗
* @return
*/
private Font getFont(Workbook workbook, short size, boolean isBold) {
Font font = workbook.createFont();
//字体样式
font.setFontName("宋体");
//是否加粗
font.setBold(isBold);
//字体大小
font.setFontHeightInPoints(size);
return font;
}
}
2、导出工具类 ExcelUtil
import cn.afterturn.easypoi.excel.ExcelExportUtil;
import cn.afterturn.easypoi.excel.entity.ExportParams;
import cn.afterturn.easypoi.excel.entity.enmus.ExcelType;
import org.apache.poi.ss.usermodel.Row;
import org.apache.poi.ss.usermodel.Sheet;
import org.apache.poi.ss.usermodel.Workbook;
import javax.servlet.http.HttpServletResponse;
import java.io.IOException;
import java.net.URLEncoder;
import java.util.List;
/**
* @author fuHua
* @date 2021年06月04日 14:09
*/
public class ExcelUtil {
public static void exportExcel(List<?> list, String title, String sheetName, Class<?> pojoClass, String fileName, ExcelType type, boolean isOneToMany, HttpServletResponse response){
ExportParams exportParams = new ExportParams(title, sheetName,type);
exportParams.setStyle(ExcelExportStylerUitl.class);
Workbook workbook = ExcelExportUtil.exportExcel(exportParams,pojoClass,list);
if (workbook != null);
//判断是否是一对多
if (isOneToMany){
setRowHeight(workbook);
}
downLoadExcel(fileName, response, workbook);
}
public static void exportExcel(List<?> list, String title, String sheetName, Class<?> pojoClass, String fileName, boolean setRowHeight, HttpServletResponse response){
ExportParams exportParams = new ExportParams(title, sheetName);
exportParams.setStyle(ExcelExportStylerUitl.class);
Workbook workbook = ExcelExportUtil.exportExcel(exportParams,pojoClass,list);
if (workbook != null);
//判断是否根据内容自适应行高
if (setRowHeight){
Sheet sheet = workbook.getSheetAt(0);
for(int i = 0; i <= sheet.getLastRowNum(); i ++) {
Row row = sheet.getRow(i);
setRowHeight(row);
}
}
downLoadExcel(fileName, response, workbook);
}
private static void downLoadExcel(String fileName, HttpServletResponse response, Workbook workbook) {
try {
response.setCharacterEncoding("UTF-8");
response.setHeader("content-Type", "application/vnd.ms-excel");
response.setHeader("Content-Disposition",
"attachment;filename=" + URLEncoder.encode(fileName, "UTF-8"));
workbook.write(response.getOutputStream());
} catch (IOException e) {
throw new RuntimeException(e.getMessage());
}
}
/**
* 一对多，设置行高
*/
private static void setRowHeight(Workbook workbook){
Sheet sheet = workbook.getSheetAt(0);
//设置第4列的列宽为60（下标从0开始），TestExportSub2Vo 不知道为什么设置了列宽但是不起作用，只能在这里单独设置
sheet.setColumnWidth(3,60*256);
for(int i = 0; i <= sheet.getLastRowNum(); i ++) {
Row row = sheet.getRow(i);
if (i==0){
//设置第一行的行高（表格标题）
row.setHeightInPoints(35);
}else if (i == 1){
//设置第二行的行高（表格表头）
row.setHeightInPoints(25);
}else {
//设置其他行的行高根据内容自适应
setRowHeight(row);
}
}
}
private static void setRowHeight(Row row){
//根据内容长度设置行高
int enterCnt = 0;
for(int j = 0; j < row.getPhysicalNumberOfCells(); j ++) {
int rwsTemp = row.getCell(j).toString().length();
//这里取每一行中的每一列字符长度最大的那一列的字符
if (rwsTemp > enterCnt) {
enterCnt = rwsTemp;
}
}
//设置默认行高为35
row.setHeightInPoints(35);
//如果字符长度大于35，判断大了多少倍，根据倍数来设置相应的行高
if (enterCnt>35){
float d = enterCnt/35;
float f = 35*d;
/*if (d>2 && d<4){
f = 35*2;
}else if(d>=4 && d<6){
f = 35*3;
}else if (d>=6 && d<8){
f = 35*4;
}*/
row.setHeightInPoints(f);
}
}
}
至于easyexcel要合并单元格的话，它没有像 easypoi 一样，有个属性可以控制合并，easyexcel需要自己写代码控制。然后根据内容自适应行高的话，easyexcel 应该也和这个差不多吧，还没研究过，下次有空去看看