山西省建设厅投诉网站,郴州新网交友手机版,房地产销售基础知识大全,国内公关公司springboot使用jxls导出excel
实现思路#xff1a; 首先在springBoot(或者SpringCloud)项目的默认templates目录放入提前定义好的Excel模板#xff0c;然后在具体的导出接口业务代码里通过IO流加载到这个Excel模板文件#xff0c;读取指定的工作薄(也就是excel左下角的Shee…springboot使用jxls导出excel
实现思路 首先在springBoot(或者SpringCloud)项目的默认templates目录放入提前定义好的Excel模板然后在具体的导出接口业务代码里通过IO流加载到这个Excel模板文件读取指定的工作薄(也就是excel左下角的Sheet)接着给模板里的指定表头填充表头数据接着读取数据库的相关数据用数据传输模型(DTO)封装数据最后循坏填充excel的数据行(逐行逐列的填充数据)最后把填充完数据的Excel文件流输出(下载)即完成了数据库数据按照指定Excel模板导出Excel的完整过程。废话不多说下面直接上代码。
1.引入依赖 !--springboot版本-- parentgroupIdorg.springframework.boot/groupIdartifactIdspring-boot-starter-parent/artifactIdversion2.0.6.RELEASE/versionrelativePath //parent!-- jxlsexcel --dependencygroupIdorg.jxls/groupIdartifactIdjxls/artifactIdversion2.3.0/version/dependencydependencygroupIdorg.jxls/groupIdartifactIdjxls-poi/artifactIdversion1.0.9/version/dependencydependencygroupIdnet.sf.jxls/groupIdartifactIdjxls-core/artifactIdversion1.0.5/version/dependency2.excel工具类 import java.io.ByteArrayOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.util.Map;
import java.util.UUID;import org.apache.poi.openxml4j.exceptions.InvalidFormatException;
import org.apache.poi.ss.usermodel.Workbook;
import org.springframework.http.HttpHeaders;
import org.springframework.http.HttpStatus;
import org.springframework.http.MediaType;
import org.springframework.http.ResponseEntity;import net.sf.jxls.exception.ParsePropertyException;
import net.sf.jxls.transformer.XLSTransformer;public class ExcelUtil {/*** 下载excel** param sourcePath 模板路径* param beanParams excel内容* return* throws ParsePropertyException* throws InvalidFormatException* throws IOException*/public static ResponseEntitybyte[] downLoadExcel(String sourcePath, MapString, Object beanParams)throws ParsePropertyException, InvalidFormatException, IOException {ByteArrayOutputStream os new ByteArrayOutputStream();//读取模板InputStream is ExcelUtil.class.getClassLoader().getResourceAsStream(sourcePath);XLSTransformer transformer new XLSTransformer();//向模板中写入内容Workbook workbook transformer.transformXLS(is, beanParams);//写入成功后转化为输出流workbook.write(os);//配置Response信息HttpHeaders headers new HttpHeaders();String downloadFileName UUID.randomUUID().toString() .xlsx;//防止中文名乱码downloadFileName new String(downloadFileName.getBytes(UTF-8), ISO-8859-1);headers.setContentDispositionFormData(attachment, downloadFileName);headers.setContentType(MediaType.APPLICATION_OCTET_STREAM);//返回return new ResponseEntitybyte[](os.toByteArray(), headers, HttpStatus.CREATED);
}3.controller调用 RequestMapping(/export)//返回ResponseEntitybyte[]使浏览器下载public ResponseEntitybyte[] exportExcel(HttpServletRequest request, HttpServletResponse response) throws Exception {//查询参数MapString, Object params new HashMapString, Object();//结果集ListAip_std list stdService.selectAllForExportExcel(params);MapString, Object beanParams new HashMapString, Object();beanParams.put(list, list);//下载表格return ExcelUtil.downLoadExcel(static/excel/aaa.xlsx,beanParams);}4.模板存放位置 5.模板 6.导出的excel 万能通用模板— SpringBoot导入、导出Excel文件
先把项目的demo发一下看完文章可以看一下demo 前言最近做项目过程中使用到了一个权限管理框架若依使用过程中发现他的文件导入和导出功能非常的实用在这里特此做一个小demo跟大家分享一下。 导出将从数据库中查出的List列表以参数的形式传入模板中即可返回Excel文件。 ApiOperation(value 导出,producesapplication/octet-stream)GetMapping(/exportExcel)public void exportExcel(HttpServletResponse response) throws IOException {// 查询数据列表ListUserData userData dataService.selectUserData(); // 将list导入模板中ExcelUtilUserData util new ExcelUtilUserData(UserData.class);//返回Excel文件util.exportExcel(response,userData , 角色数据);}导入将Excel文件上传模板代码会将此Excel文件转换成List列表的形式返回我们可以将返回的list列表插入到数据库中。 ApiOperation(导入)PostMapping(/importExcel)public int importExcel(MultipartFile file) throws Exception {ExcelUtilUserData util new ExcelUtil(UserData.class);// 将文件以流的形式传入到模板代码中返回List列表ListUserData userDataList util.importExcel(file.getInputStream());// 将list列表插入到数据库中int insertFlag dataService.importUserData(userDataList);if (insertFlag 0){throw new RuntimeException(导入失败);}return insertFlag;}一、效果图
1.导出Excel 打开Excel效果 2.导入Excel 1创建Excel 2使用swagger导入 3查看数据库数据 导入成功 二、实现
1.数据库
CREATE TABLE data (name varchar(33) DEFAULT NULL,project varchar(33) DEFAULT NULL,score int(3) DEFAULT NULL,id int(10) NOT NULL AUTO_INCREMENT,PRIMARY KEY (id),KEY indx_data_funshu (score)
) ENGINEInnoDB AUTO_INCREMENT24 DEFAULT CHARSETutf8;2. 代码东西较多这里只粘贴核心代码详情请查看详细代码 1实体类在需要导出的字段上加入Excel注解name为导出后Excel的表头 Data
Table(name data)
public class UserData {IdExcel(name 序号)Integer id;Excel(name 名字)String name;Excel(name 课程)String project;Excel(name 分数)Integer score;
}2controller文件 package com.example.commonutils.controller;import com.example.commonutils.common.ExcelUtil;
import com.example.commonutils.domain.UserData;
import com.example.commonutils.service.DataService;
import io.swagger.annotations.Api;
import io.swagger.annotations.ApiOperation;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.PostMapping;
import org.springframework.web.bind.annotation.RestController;
import org.springframework.web.multipart.MultipartFile;import javax.servlet.http.HttpServletResponse;
import java.io.IOException;
import java.util.List;/*** author tianzhuang*/
Api(tags Excel的导入导出)
RestController
public class ExportExcelController {Autowiredprivate DataService dataService;/*** 在浏览器地址栏输入此接口地址即可导出Excel用swagger导出是乱码暂未解决* param response* throws IOException*/ApiOperation(value 导出,producesapplication/octet-stream)GetMapping(/exportExcel)public void exportExcel(HttpServletResponse response) throws IOException {ListUserData userData dataService.selectUserData();ExcelUtilUserData util new ExcelUtilUserData(UserData.class);util.exportExcel(response,userData , 角色数据);}/**** param file* return* throws Exception*/ApiOperation(导入)PostMapping(/importExcel)public int importExcel(MultipartFile file) throws Exception {ExcelUtilUserData util new ExcelUtil(UserData.class);ListUserData userDataList util.importExcel(file.getInputStream());int insertFlag dataService.importUserData(userDataList);if (insertFlag 0){throw new RuntimeException(导入失败);}return insertFlag;}
}ExcelUtil代码 package com.example.commonutils.common;import com.example.commonutils.common.Excel.ColumnType;
import com.example.commonutils.common.Excel.Type;
import org.apache.poi.hssf.usermodel.HSSFDateUtil;
import org.apache.poi.ss.usermodel.*;
import org.apache.poi.ss.util.CellRangeAddressList;
import org.apache.poi.xssf.streaming.SXSSFWorkbook;
import org.apache.poi.xssf.usermodel.XSSFDataValidation;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;import javax.servlet.http.HttpServletResponse;
import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;
import java.lang.reflect.Field;
import java.math.BigDecimal;
import java.text.DecimalFormat;
import java.util.*;
import java.util.stream.Collectors;/*** Excel相关处理* * author ruoyi*/
public class ExcelUtilT
{private static final Logger log LoggerFactory.getLogger(ExcelUtil.class);/*** Excel sheet最大行数默认65536*/public static final int sheetSize 65536;/*** 工作表名称*/private String sheetName;/*** 导出类型EXPORT:导出数据IMPORT导入模板*/private Type type;/*** 工作薄对象*/private Workbook wb;/*** 工作表对象*/private Sheet sheet;/*** 样式列表*/private MapString, CellStyle styles;/*** 导入导出数据列表*/private ListT list;/*** 注解列表*/private ListObject[] fields;/*** 统计列表*/private MapInteger, Double statistics new HashMapInteger, Double();/*** 数字格式*/private static final DecimalFormat DOUBLE_FORMAT new DecimalFormat(######0.00);/*** 实体对象*/public ClassT clazz;public ExcelUtil(ClassT clazz){this.clazz clazz;}public void init(ListT list, String sheetName, Type type){if (list null){list new ArrayListT();}this.list list;this.sheetName sheetName;this.type type;createExcelField();createWorkbook();}/*** 对excel表单默认第一个索引名转换成list* * param is 输入流* return 转换后集合*/public ListT importExcel(InputStream is) throws Exception{return importExcel(StringUtils.EMPTY, is);}/*** 对excel表单指定表格索引名转换成list* * param sheetName 表格索引名* param is 输入流* return 转换后集合*/public ListT importExcel(String sheetName, InputStream is) throws Exception{this.type Type.IMPORT;this.wb WorkbookFactory.create(is);ListT list new ArrayListT();Sheet sheet null;if (StringUtils.isNotEmpty(sheetName)){// 如果指定sheet名,则取指定sheet中的内容.sheet wb.getSheet(sheetName);}else{// 如果传入的sheet名不存在则默认指向第1个sheet.sheet wb.getSheetAt(0);}if (sheet null){throw new IOException(文件sheet不存在);}int rows sheet.getPhysicalNumberOfRows();if (rows 0){// 定义一个map用于存放excel列的序号和field.MapString, Integer cellMap new HashMapString, Integer();// 获取表头Row heard sheet.getRow(0);for (int i 0; i heard.getPhysicalNumberOfCells(); i){Cell cell heard.getCell(i);if (StringUtils.isNotNull(cell)){String value this.getCellValue(heard, i).toString();cellMap.put(value, i);}else{cellMap.put(null, i);}}// 有数据时才处理 得到类的所有field.Field[] allFields clazz.getDeclaredFields();// 定义一个map用于存放列的序号和field.MapInteger, Field fieldsMap new HashMapInteger, Field();for (int col 0; col allFields.length; col){Field field allFields[col];Excel attr field.getAnnotation(Excel.class);if (attr ! null (attr.type() Type.ALL || attr.type() type)){// 设置类的私有字段属性可访问.field.setAccessible(true);Integer column cellMap.get(attr.name());if (column ! null){fieldsMap.put(column, field);}}}for (int i 1; i rows; i){// 从第2行开始取数据,默认第一行是表头.Row row sheet.getRow(i);T entity null;for (Map.EntryInteger, Field entry : fieldsMap.entrySet()){Object val this.getCellValue(row, entry.getKey());// 如果不存在实例则新建.entity (entity null ? clazz.newInstance() : entity);// 从map中得到对应列的field.Field field fieldsMap.get(entry.getKey());// 取得类型,并根据对象类型设置值.Class? fieldType field.getType();if (String.class fieldType){String s Convert.toStr(val);if (StringUtils.endsWith(s, .0)){val StringUtils.substringBefore(s, .0);}else{val Convert.toStr(val);}}else if ((Integer.TYPE fieldType || Integer.class fieldType) StringUtils.isNumeric(Convert.toStr(val))){val Convert.toInt(val);}else if (Long.TYPE fieldType || Long.class fieldType){val Convert.toLong(val);}else if (Double.TYPE fieldType || Double.class fieldType){val Convert.toDouble(val);}else if (Float.TYPE fieldType || Float.class fieldType){val Convert.toFloat(val);}else if (BigDecimal.class fieldType){val Convert.toBigDecimal(val);}else if (Date.class fieldType){if (val instanceof String){val DateUtils.parseDate(val);}else if (val instanceof Double){val DateUtil.getJavaDate((Double) val);}}if (StringUtils.isNotNull(fieldType)){Excel attr field.getAnnotation(Excel.class);String propertyName field.getName();if (StringUtils.isNotEmpty(attr.targetAttr())){propertyName field.getName() . attr.targetAttr();}else if (StringUtils.isNotEmpty(attr.readConverterExp())){val reverseByExp(Convert.toStr(val), attr.readConverterExp(), attr.separator());}ReflectUtils.invokeSetter(entity, propertyName, val);}}list.add(entity);}}return list;}/*** 对list数据源将其里面的数据导入到excel表单* * param response 返回数据* param list 导出数据集合* param sheetName 工作表的名称* return 结果* throws IOException*/public void exportExcel(HttpServletResponse response, ListT list, String sheetName) throws IOException{response.setContentType(application/vnd.ms-excel);response.setCharacterEncoding(utf-8);this.init(list, sheetName, Type.EXPORT);exportExcel(response.getOutputStream());}/*** 对list数据源将其里面的数据导入到excel表单* * param sheetName 工作表的名称* return 结果*/public void importTemplateExcel(HttpServletResponse response, String sheetName) throws IOException{response.setContentType(application/vnd.ms-excel);response.setCharacterEncoding(utf-8);this.init(null, sheetName, Type.IMPORT);exportExcel(response.getOutputStream());}/*** 对list数据源将其里面的数据导入到excel表单* * return 结果*/public void exportExcel(OutputStream outputStream){try{// 取出一共有多少个sheet.double sheetNo Math.ceil(list.size() / sheetSize);for (int index 0; index sheetNo; index){createSheet(sheetNo, index);// 产生一行Row row sheet.createRow(0);int column 0;// 写入各个字段的列头名称for (Object[] os : fields){Excel excel (Excel) os[1];this.createCell(excel, row, column);}if (Type.EXPORT.equals(type)){fillExcelData(index, row);addStatisticsRow();}}wb.write(outputStream);}catch (Exception e){log.error(导出Excel异常{}, e.getMessage());}finally{if (wb ! null){try{wb.close();}catch (IOException e1){e1.printStackTrace();}}if (outputStream ! null){try{outputStream.close();}catch (IOException e1){e1.printStackTrace();}}}}/*** 填充excel数据* * param index 序号* param row 单元格行*/public void fillExcelData(int index, Row row){int startNo index * sheetSize;int endNo Math.min(startNo sheetSize, list.size());for (int i startNo; i endNo; i){row sheet.createRow(i 1 - startNo);// 得到导出对象.T vo (T) list.get(i);int column 0;for (Object[] os : fields){Field field (Field) os[0];Excel excel (Excel) os[1];// 设置实体类私有属性可访问field.setAccessible(true);this.addCell(excel, row, vo, field, column);}}}/*** 创建表格样式* * param wb 工作薄对象* return 样式列表*/private MapString, CellStyle createStyles(Workbook wb){// 写入各条记录,每条记录对应excel表中的一行MapString, CellStyle styles new HashMapString, CellStyle();CellStyle style wb.createCellStyle();style.setAlignment(HorizontalAlignment.CENTER);style.setVerticalAlignment(VerticalAlignment.CENTER);style.setBorderRight(BorderStyle.THIN);style.setRightBorderColor(IndexedColors.GREY_50_PERCENT.getIndex());style.setBorderLeft(BorderStyle.THIN);style.setLeftBorderColor(IndexedColors.GREY_50_PERCENT.getIndex());style.setBorderTop(BorderStyle.THIN);style.setTopBorderColor(IndexedColors.GREY_50_PERCENT.getIndex());style.setBorderBottom(BorderStyle.THIN);style.setBottomBorderColor(IndexedColors.GREY_50_PERCENT.getIndex());Font dataFont wb.createFont();dataFont.setFontName(Arial);dataFont.setFontHeightInPoints((short) 10);style.setFont(dataFont);styles.put(data, style);style wb.createCellStyle();style.cloneStyleFrom(styles.get(data));style.setAlignment(HorizontalAlignment.CENTER);style.setVerticalAlignment(VerticalAlignment.CENTER);style.setFillForegroundColor(IndexedColors.GREY_50_PERCENT.getIndex());style.setFillPattern(FillPatternType.SOLID_FOREGROUND);Font headerFont wb.createFont();headerFont.setFontName(Arial);headerFont.setFontHeightInPoints((short) 10);headerFont.setBold(true);headerFont.setColor(IndexedColors.WHITE.getIndex());style.setFont(headerFont);styles.put(header, style);style wb.createCellStyle();style.setAlignment(HorizontalAlignment.CENTER);style.setVerticalAlignment(VerticalAlignment.CENTER);Font totalFont wb.createFont();totalFont.setFontName(Arial);totalFont.setFontHeightInPoints((short) 10);style.setFont(totalFont);styles.put(total, style);return styles;}/*** 创建单元格*/public Cell createCell(Excel attr, Row row, int column){// 创建列Cell cell row.createCell(column);// 写入列信息cell.setCellValue(attr.name());setDataValidation(attr, row, column);cell.setCellStyle(styles.get(header));return cell;}/*** 设置单元格信息* * param value 单元格值* param attr 注解相关* param cell 单元格信息*/public void setCellVo(Object value, Excel attr, Cell cell){if (ColumnType.STRING attr.cellType()){cell.setCellType(CellType.STRING);cell.setCellValue(StringUtils.isNull(value) ? attr.defaultValue() : value attr.suffix());}else if (ColumnType.NUMERIC attr.cellType()){cell.setCellType(CellType.NUMERIC);cell.setCellValue(StringUtils.contains(Convert.toStr(value), .) ? Convert.toDouble(value) : Convert.toInt(value));}}/*** 创建表格样式*/public void setDataValidation(Excel attr, Row row, int column){if (attr.name().indexOf(注) 0){sheet.setColumnWidth(column, 6000);}else{// 设置列宽sheet.setColumnWidth(column, (int) ((attr.width() 0.72) * 256));row.setHeight((short) (attr.height() * 20));}// 如果设置了提示信息则鼠标放上去提示.if (StringUtils.isNotEmpty(attr.prompt())){// 这里默认设了2-101列提示.setXSSFPrompt(sheet, , attr.prompt(), 1, 100, column, column);}// 如果设置了combo属性则本列只能选择不能输入if (attr.combo().length 0){// 这里默认设了2-101列只能选择不能输入.setXSSFValidation(sheet, attr.combo(), 1, 100, column, column);}}/*** 添加单元格*/public Cell addCell(Excel attr, Row row, T vo, Field field, int column){Cell cell null;try{// 设置行高row.setHeight((short) (attr.height() * 20));// 根据Excel中设置情况决定是否导出,有些情况需要保持为空,希望用户填写这一列.if (attr.isExport()){// 创建cellcell row.createCell(column);cell.setCellStyle(styles.get(data));// 用于读取对象中的属性Object value getTargetValue(vo, field, attr);String dateFormat attr.dateFormat();String readConverterExp attr.readConverterExp();String separator attr.separator();if (StringUtils.isNotEmpty(dateFormat) StringUtils.isNotNull(value)){cell.setCellValue(DateUtils.parseDateToStr(dateFormat, (Date) value));}else if (StringUtils.isNotEmpty(readConverterExp) StringUtils.isNotNull(value)){cell.setCellValue(convertByExp(Convert.toStr(value), readConverterExp, separator));}else if (value instanceof BigDecimal -1 ! attr.scale()){cell.setCellValue((((BigDecimal) value).setScale(attr.scale(), attr.roundingMode())).toString());}else{// 设置列类型setCellVo(value, attr, cell);}addStatisticsData(column, Convert.toStr(value), attr);}}catch (Exception e){log.error(导出Excel失败{}, e);}return cell;}/*** 设置 POI XSSFSheet 单元格提示* * param sheet 表单* param promptTitle 提示标题* param promptContent 提示内容* param firstRow 开始行* param endRow 结束行* param firstCol 开始列* param endCol 结束列*/public void setXSSFPrompt(Sheet sheet, String promptTitle, String promptContent, int firstRow, int endRow,int firstCol, int endCol){DataValidationHelper helper sheet.getDataValidationHelper();DataValidationConstraint constraint helper.createCustomConstraint(DD1);CellRangeAddressList regions new CellRangeAddressList(firstRow, endRow, firstCol, endCol);DataValidation dataValidation helper.createValidation(constraint, regions);dataValidation.createPromptBox(promptTitle, promptContent);dataValidation.setShowPromptBox(true);sheet.addValidationData(dataValidation);}/*** 设置某些列的值只能输入预制的数据,显示下拉框.* * param sheet 要设置的sheet.* param textlist 下拉框显示的内容* param firstRow 开始行* param endRow 结束行* param firstCol 开始列* param endCol 结束列* return 设置好的sheet.*/public void setXSSFValidation(Sheet sheet, String[] textlist, int firstRow, int endRow, int firstCol, int endCol){DataValidationHelper helper sheet.getDataValidationHelper();// 加载下拉列表内容DataValidationConstraint constraint helper.createExplicitListConstraint(textlist);// 设置数据有效性加载在哪个单元格上,四个参数分别是起始行、终止行、起始列、终止列CellRangeAddressList regions new CellRangeAddressList(firstRow, endRow, firstCol, endCol);// 数据有效性对象DataValidation dataValidation helper.createValidation(constraint, regions);// 处理Excel兼容性问题if (dataValidation instanceof XSSFDataValidation){dataValidation.setSuppressDropDownArrow(true);dataValidation.setShowErrorBox(true);}else{dataValidation.setSuppressDropDownArrow(false);}sheet.addValidationData(dataValidation);}/*** 解析导出值 0男,1女,2未知* * param propertyValue 参数值* param converterExp 翻译注解* param separator 分隔符* return 解析后值*/public static String convertByExp(String propertyValue, String converterExp, String separator){StringBuilder propertyString new StringBuilder();String[] convertSource converterExp.split(,);for (String item : convertSource){String[] itemArray item.split();if (StringUtils.containsAny(separator, propertyValue)){for (String value : propertyValue.split(separator)){if (itemArray[0].equals(value)){propertyString.append(itemArray[1] separator);break;}}}else{if (itemArray[0].equals(propertyValue)){return itemArray[1];}}}return StringUtils.stripEnd(propertyString.toString(), separator);}/*** 反向解析值 男0,女1,未知2* * param propertyValue 参数值* param converterExp 翻译注解* param separator 分隔符* return 解析后值*/public static String reverseByExp(String propertyValue, String converterExp, String separator){StringBuilder propertyString new StringBuilder();String[] convertSource converterExp.split(,);for (String item : convertSource){String[] itemArray item.split();if (StringUtils.containsAny(separator, propertyValue)){for (String value : propertyValue.split(separator)){if (itemArray[1].equals(value)){propertyString.append(itemArray[0] separator);break;}}}else{if (itemArray[1].equals(propertyValue)){return itemArray[0];}}}return StringUtils.stripEnd(propertyString.toString(), separator);}/*** 合计统计信息*/private void addStatisticsData(Integer index, String text, Excel entity){if (entity ! null entity.isStatistics()){Double temp 0D;if (!statistics.containsKey(index)){statistics.put(index, temp);}try{temp Double.valueOf(text);}catch (NumberFormatException e){}statistics.put(index, statistics.get(index) temp);}}/*** 创建统计行*/public void addStatisticsRow(){if (statistics.size() 0){Cell cell null;Row row sheet.createRow(sheet.getLastRowNum() 1);SetInteger keys statistics.keySet();cell row.createCell(0);cell.setCellStyle(styles.get(total));cell.setCellValue(合计);for (Integer key : keys){cell row.createCell(key);cell.setCellStyle(styles.get(total));cell.setCellValue(DOUBLE_FORMAT.format(statistics.get(key)));}statistics.clear();}}/*** 获取bean中的属性值* * param vo 实体对象* param field 字段* param excel 注解* return 最终的属性值* throws Exception*/private Object getTargetValue(T vo, Field field, Excel excel) throws Exception{Object o field.get(vo);if (StringUtils.isNotEmpty(excel.targetAttr())){String target excel.targetAttr();if (target.indexOf(.) -1){String[] targets target.split([.]);for (String name : targets){o getValue(o, name);}}else{o getValue(o, target);}}return o;}/*** 以类的属性的get方法方法形式获取值* * param o* param name* return value* throws Exception*/private Object getValue(Object o, String name) throws Exception{if (StringUtils.isNotEmpty(name)){Class? clazz o.getClass();Field field clazz.getDeclaredField(name);field.setAccessible(true);o field.get(o);}return o;}/*** 得到所有定义字段*/private void createExcelField(){this.fields new ArrayListObject[]();ListField tempFields new ArrayList();tempFields.addAll(Arrays.asList(clazz.getSuperclass().getDeclaredFields()));tempFields.addAll(Arrays.asList(clazz.getDeclaredFields()));for (Field field : tempFields){// 单注解if (field.isAnnotationPresent(Excel.class)){putToField(field, field.getAnnotation(Excel.class));}// 多注解if (field.isAnnotationPresent(Excels.class)){Excels attrs field.getAnnotation(Excels.class);Excel[] excels attrs.value();for (Excel excel : excels){putToField(field, excel);}}}this.fields this.fields.stream().sorted(Comparator.comparing(objects - ((Excel) objects[1]).sort())).collect(Collectors.toList());}/*** 放到字段集合中*/private void putToField(Field field, Excel attr){if (attr ! null (attr.type() Type.ALL || attr.type() type)){this.fields.add(new Object[] { field, attr });}}/*** 创建一个工作簿*/public void createWorkbook(){this.wb new SXSSFWorkbook(500);}/*** 创建工作表* * param sheetNo sheet数量* param index 序号*/public void createSheet(double sheetNo, int index){this.sheet wb.createSheet();this.styles createStyles(wb);// 设置工作表的名称.if (sheetNo 0){wb.setSheetName(index, sheetName);}else{wb.setSheetName(index, sheetName index);}}/*** 获取单元格值* * param row 获取的行* param column 获取单元格列号* return 单元格值*/public Object getCellValue(Row row, int column){if (row null){return row;}Object val ;try{Cell cell row.getCell(column);if (StringUtils.isNotNull(cell)){if (cell.getCellTypeEnum() CellType.NUMERIC || cell.getCellTypeEnum() CellType.FORMULA){val cell.getNumericCellValue();if (HSSFDateUtil.isCellDateFormatted(cell)){val DateUtil.getJavaDate((Double) val); // POI Excel 日期格式转换}else{if ((Double) val % 1 0){val new BigDecimal(val.toString());}else{val new DecimalFormat(0).format(val);}}}else if (cell.getCellTypeEnum() CellType.STRING){val cell.getStringCellValue();}else if (cell.getCellTypeEnum() CellType.BOOLEAN){val cell.getBooleanCellValue();}else if (cell.getCellTypeEnum() CellType.ERROR){val cell.getErrorCellValue();}}}catch (Exception e){return val;}return val;}
}3Excel注解代码 package com.example.commonutils.common;import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
import java.math.BigDecimal;/*** 自定义导出Excel数据注解* * author ruoyi*/
Retention(RetentionPolicy.RUNTIME)
Target(ElementType.FIELD)
public interface Excel
{/*** 导出时在excel中排序*/public int sort() default Integer.MAX_VALUE;/*** 导出到Excel中的名字.*/public String name() default ;/*** 日期格式, 如: yyyy-MM-dd*/public String dateFormat() default ;/*** 读取内容转表达式 (如: 0男,1女,2未知)*/public String readConverterExp() default ;/*** 分隔符读取字符串组内容*/public String separator() default ,;/*** BigDecimal 精度 默认:-1(默认不开启BigDecimal格式化)*/public int scale() default -1;/*** BigDecimal 舍入规则 默认:BigDecimal.ROUND_HALF_EVEN*/public int roundingMode() default BigDecimal.ROUND_HALF_EVEN;/*** 导出类型0数字 1字符串*/public ColumnType cellType() default ColumnType.STRING;/*** 导出时在excel中每个列的高度 单位为字符*/public double height() default 14;/*** 导出时在excel中每个列的宽 单位为字符*/public double width() default 16;/*** 文字后缀,如% 90 变成90%*/public String suffix() default ;/*** 当值为空时,字段的默认值*/public String defaultValue() default ;/*** 提示信息*/public String prompt() default ;/*** 设置只能选择不能输入的列内容.*/public String[] combo() default {};/*** 是否导出数据,应对需求:有时我们需要导出一份模板,这是标题需要但内容需要用户手工填写.*/public boolean isExport() default true;/*** 另一个类中的属性名称,支持多级获取,以小数点隔开*/public String targetAttr() default ;/*** 是否自动统计数据,在最后追加一行统计数据总和*/public boolean isStatistics() default false;/*** 字段类型0导出导入1仅导出2仅导入*/Type type() default Type.ALL;public enum Type{ALL(0), EXPORT(1), IMPORT(2);private final int value;Type(int value){this.value value;}public int value(){return this.value;}}public enum ColumnType{NUMERIC(0), STRING(1);private final int value;ColumnType(int value){this.value value;}public int value(){return this.value;}}
}代码量较多本文只放了部分代码可以进入demo进行详细查看 SpringBoot整合EasyExcel模板导出Excel
创建SpringBoot项目
导入EasyExcel.jar
dependencygroupIdcom.alibaba/groupIdartifactIdeasyexcel/artifactIdversion2.1.6/version
/dependency创建Excel模板 实体类
public class FillData {private String name;NumberFormat(##.0)private Double chinese;NumberFormat(##.0)private Double math;NumberFormat(##.0)private Double english;NumberFormat(##.0)private Double number;//getter setter
}Service实现
Service
public class ExcelExportServiceImpl implements ExcelExportService{//在springboot文件(application.properties)中配置模板所在的位置例如//excel.templateE:/SpringToolSuiteForEclipseWorkSpace/PrivateApplication/EasyExcel/src/main/resources/1.xlsxValue(${excel.template})private String templateFileName;Overridepublic void excelExport(HttpServletResponse response) throws IOException {// 模板注意 用{} 来表示你要用的变量 如果本来就有{,} 特殊字符 用\{,\}代替System.out.println(templateFileName);// 方案1 根据对象填充String fileName simpleFill System.currentTimeMillis() .xlsx;// 这里 会填充到第一个sheet 然后文件流会自动关闭ListFillData l new ArrayList();for(Integer i 0; i 50; i){FillData fillData new FillData();fillData.setName(张三 i号);fillData.setChinese(120.0i);fillData.setEnglish(141.0i);fillData.setMath(119.0i);fillData.setNumber(fillData.getChinese()fillData.getEnglish()fillData.getMath());l.add(fillData);}response.setContentType(application/vnd.ms-excel);response.setCharacterEncoding(UTF-8);response.setHeader(Content-disposition,attachment;filenamenew String(fileName.getBytes(),iso-8859-1));EasyExcel.write(response.getOutputStream(),FillData.class).withTemplate(templateFileName).sheet().doFill(l);}
}EasyExcel是import com.alibaba.excel.EasyExcel;
Service接口
public interface ExcelExportService {void excelExport(HttpServletResponse response) throws IOException;}
12345控制器Controller
RestController
public class HelloController {Autowiredprivate ExcelExportService excelExportService;GetMapping(/h)public void h(HttpServletResponse response) throws IOException {excelExportService.excelExport(response);}
}然后访问/h接口就可以导出一个Excel文件
