- 添加依赖
<!-- excel导出工具 -->
<dependency>
<groupId>org.apache.poi</groupId>
<artifactId>poi</artifactId>
<version>3.17</version>
</dependency>
<dependency>
<groupId>org.apache.poi</groupId>
<artifactId>poi-ooxml</artifactId>
<version>3.17</version>
</dependency>
<dependency>
<groupId>com.monitorjbl</groupId>
<artifactId>xlsx-streamer</artifactId>
<version>1.2.0</version>
</dependency>
- 创建一个返回文件二进制流的VO对象(如果不需要返回文件二进制流给前端，就无须创建)
package org.sc.api.ps.model.vo;
import java.io.Serializable;
import io.swagger.annotations.ApiModelProperty;
import lombok.Data;
@Data
public class ExportDataVo implements Serializable{
/**
*
*/
private static final long serialVersionUID = 1L;
/** 文件名称 **/
@ApiModelProperty(value = "文件名称")
private String fileName;
/** 文件二进制流 **/
@ApiModelProperty(value = "文件二进制流")
private byte[] fileByte;
}
- 引入WorkbookContext文件(如果不需要返回文件二进制流给前端，就无须引入)
package org.sc.common.utils.poi.api.wookbook;
import org.apache.poi.ss.usermodel.Workbook;
import org.sc.common.utils.poi.api.configuration.ConfigurationProvider;
import org.sc.common.utils.poi.api.sheet.SheetContext;
import org.sc.common.utils.poi.api.style.StyleConfigurable;
import org.sc.common.utils.poi.api.style.StyleConfiguration;
import org.sc.common.utils.poi.api.style.StyleRegistry;
import org.apache.poi.ss.usermodel.CellStyle;
/**
* Workbook context.
*
* @author i.voshkulat
*
*/
public interface WorkbookContext extends ConfigurationProvider, StyleRegistry, StyleConfiguration, StyleConfigurable<WorkbookContext> {
/**
* Create new sheet within the current workbook.
*
* @param sheetName sheet name
* @return created {@link SheetContext}
*/
public SheetContext createSheet(String sheetName);
/**
* Use an existing sheet within the current workbook
*
* @param sheetName sheet to use
* @return existing {@link SheetContext}
* @throws java.lang.IllegalArgumentException if a sheet with the given name doesn't exist
*/
public SheetContext useSheet(String sheetName);
/**
* Retrieve POI workbook referred to by current {@link WorkbookContext}.
* Please refrain from using the exposed {@link Workbook} directly unless you need functionality of POI not provided by {@link WorkbookContext}.
* To retrieve a workbook for saving to a file look at {@link #toNativeBytes()} instead.
*
* @return native POI {@link Workbook}
*/
public Workbook toNativeWorkbook();
/**
* Create .xls file binary representation for current {@link WorkbookContext}
*
* @return excel file binary representation
*/
public byte[] toNativeBytes();
/**
* xls and xlsx files have different default fonts
*
* @return font name
*/
public String getDefaultFontName();
public CellStyle createLeftStyleCell(WorkbookContext workbookCtx,boolean wrapText);
public CellStyle createCenterStyleCell(WorkbookContext workbookCtx,boolean wrapText);
public CellStyle createRedStyleCell(WorkbookContext workbookCtx,boolean wrapText);
public CellStyle createTopStyleCell(WorkbookContext workbookCtx,boolean wrapText);
public CellStyle createRightStyleCell(WorkbookContext workbookCtx,boolean wrapText);
}
- 接口类
package org.sc.api.ps.service;
import java.io.IOException;
import javax.servlet.http.HttpServletResponse;
import org.apache.poi.EncryptedDocumentException;
import org.apache.poi.openxml4j.exceptions.InvalidFormatException;
import org.sc.api.ps.model.vo.ExportDataVo;
import org.sc.common.model.vo.Response;
import org.springframework.web.multipart.MultipartFile;
public interface ExcelService {
/**
* 以Excel模板表导入角色信息
*
* @throws InvalidFormatException
* @throws EncryptedDocumentException
* @throws Exception
*/
Response importRole(MultipartFile file) throws EncryptedDocumentException, InvalidFormatException, Exception;
/**
* 导出角色信息列表
*
* @return
* @throws IOException
*/
String export() throws IOException;
/**
* 导出角色信息列表(返回文件二进制流)
*
* @return
*/
ExportDataVo exportFileStreams();
}
- 实现类
package org.sc.api.ps.service.impl;
import java.io.BufferedOutputStream;
import java.io.ByteArrayInputStream;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;
import java.util.Calendar;
import java.util.List;
import javax.servlet.http.HttpServletResponse;
import org.apache.poi.hssf.usermodel.HSSFCell;
import org.apache.poi.hssf.usermodel.HSSFCellStyle;
import org.apache.poi.hssf.usermodel.HSSFFont;
import org.apache.poi.hssf.usermodel.HSSFRichTextString;
import org.apache.poi.hssf.usermodel.HSSFRow;
import org.apache.poi.hssf.usermodel.HSSFSheet;
import org.apache.poi.hssf.usermodel.HSSFWorkbook;
import org.apache.poi.ss.usermodel.BorderStyle;
import org.apache.poi.ss.usermodel.Cell;
import org.apache.poi.ss.usermodel.CellStyle;
import org.apache.poi.ss.usermodel.DataFormatter;
import org.apache.poi.ss.usermodel.FillPatternType;
import org.apache.poi.ss.usermodel.HorizontalAlignment;
import org.apache.poi.ss.usermodel.IndexedColors;
import org.apache.poi.ss.usermodel.Row;
import org.apache.poi.ss.usermodel.Sheet;
import org.apache.poi.ss.usermodel.VerticalAlignment;
import org.apache.poi.ss.usermodel.Workbook;
import org.apache.poi.ss.util.CellRangeAddress;
import org.sc.api.ps.model.vo.ExportDataVo;
import org.sc.api.ps.service.ExcelService;
import org.sc.common.model.vo.Response;
import org.sc.common.utils.GetDate;
import org.sc.common.utils.poi.api.row.RowContext;
import org.sc.common.utils.poi.api.sheet.SheetContext;
import org.sc.common.utils.poi.api.wookbook.WorkbookContext;
import org.sc.common.utils.poi.impl.wookbook.WorkbookContextFactory;
import org.sc.common.utils.web.ResponseUtil;
import org.sc.facade.ps.model.table.Role;
import org.sc.facade.ps.service.RoleService;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import org.springframework.web.multipart.MultipartFile;
import com.monitorjbl.xlsx.StreamingReader;
@Service
public class ExcelServiceImpl implements ExcelService {
@Autowired
private RoleService roleService;
@Override
public Response importRole(MultipartFile file) throws Exception {
try {
// 流式的读取 xlsx 文件，将一些特别大的文件拆分成小的文件去读。
Workbook workbook = StreamingReader.builder().rowCacheSize(1000)
.bufferSize(4096).open(file.getInputStream());
String value = "";
int i = 0;
for (Sheet sheet : workbook) {
Role answer = null;
for (Row r : sheet) {
if (i == 0) {// 遍历每一行，注意：第 0 行为标题
i = 1;
continue;
}
int ceIndex = 0;
answer = new Role();
for (Cell cell : r) {
if (cell.getCellType() == Cell.CELL_TYPE_STRING) {
value = cell.getStringCellValue();
} else if (cell.getCellType() == Cell.CELL_TYPE_NUMERIC) {
if (file.getOriginalFilename().endsWith(".xls")) {
DataFormatter formatter = new DataFormatter();
value = formatter.formatCellValue(cell);
} else {
value = cell.getStringCellValue();
}
}
switch (ceIndex) {
case 0:
answer.setRoleName(value);// 角色名
break;
case 1:
answer.setRoleCode(value);// 角色编号
break;
case 2:
answer.setParentId(value);// 父级id
break;
}
ceIndex++;
}
roleService.addRole(answer);// 新增角色
}
}
} catch (IOException e) {
return ResponseUtil.error(e.getMessage());
}
return ResponseUtil.ok();
}
@Override
public String export() throws IOException {
HSSFWorkbook wb = new HSSFWorkbook();
HSSFSheet sheet = wb.createSheet("角色列表");
//合并单元格
sheet.addMergedRegion(new CellRangeAddress(0, 2, 0, 5));
//设置第一列单元格宽度
sheet.setColumnWidth(0,100*100);
//设置第二列单元格宽度
sheet.setColumnWidth(1,100*100);
//创建第一行
HSSFRow row0 = sheet.createRow(0);
//创建第二行
HSSFRow row1 = sheet.createRow(1);
//设置第一行单元格高度
row0.setHeight((short) 400);
//创建第一行第一列单元格
HSSFCell cell0_1 = row0.createCell(0);
//创建第二行第一列单元格
HSSFCell cell0_2 = row1.createCell(0);
//设置单元格的值
cell0_1.setCellValue("角色列表");
//改变字体样式，步骤
HSSFFont hssfFont = wb.createFont();
//设置字体,红色
hssfFont.setColor(HSSFFont.COLOR_RED);
//字体粗体显示
hssfFont.setBold(true);
hssfFont.setFontName("宋体");
// 字体大小
hssfFont.setFontHeightInPoints((short) 22);
//设置样式
HSSFCellStyle cellStyle = wb.createCellStyle();
cellStyle.setFont(hssfFont);
//设置单元格背景色
cellStyle.setFillForegroundColor(IndexedColors.GREY_40_PERCENT.getIndex());
cellStyle.setFillPattern(FillPatternType.SOLID_FOREGROUND);
//设置居中
cellStyle.setAlignment(HorizontalAlignment.CENTER);//水平居中
cellStyle.setVerticalAlignment(VerticalAlignment.CENTER);//垂直居中
//设置边框
cellStyle.setBorderBottom(BorderStyle.THIN); //下边框
cellStyle.setBorderLeft(BorderStyle.DASH_DOT_DOT);//左边框
cellStyle.setBorderTop(BorderStyle.THIN);//上边框
cellStyle.setBorderRight(BorderStyle.THIN);//右边框
//3.单元格使用样式，设置第一行第一列单元格样式
cell0_1.setCellStyle(cellStyle);
cell0_2.setCellStyle(cellStyle);
//创建表头
setTitle(wb, sheet);
List<Role> roles = roleService.getRoles("");
//新增数据行，并且设置单元格数据
int rowNum = 4;
for (Role role:roles) {
HSSFRow row = sheet.createRow(rowNum);
row.createCell(0).setCellValue(role.getRoleName());
row.createCell(1).setCellValue(role.getRoleCode());
row.createCell(2).setCellValue(role.getParentId());
rowNum++;
}
//生成excel文件
FileOutputStream fileOut = new FileOutputStream("e:\\"+System.currentTimeMillis()+".xls");
wb.write(fileOut);
fileOut.close();
return "1";
}
/***
* 设置表头
*
* @param workbook
* @param sheet
*/
private void setTitle(HSSFWorkbook workbook, HSSFSheet sheet) {
HSSFRow row = sheet.createRow(3);
// 设置列宽，setColumnWidth的第二个参数要乘以256，这个参数的单位是1/256个字符宽度
sheet.setColumnWidth(0, 10 * 256);
sheet.setColumnWidth(1, 20 * 256);
sheet.setColumnWidth(2, 20 * 256);
// 设置为居中加粗
HSSFCellStyle style = workbook.createCellStyle();
HSSFFont font = workbook.createFont();
font.setBold(true);
style.setFont(font);
HSSFCell cell;
cell = row.createCell(0);
cell.setCellValue("角色名");
cell.setCellStyle(style);
cell = row.createCell(1);
cell.setCellValue("角色编号");
cell.setCellStyle(style);
cell = row.createCell(2);
cell.setCellValue("父级id");
cell.setCellStyle(style);
}
@Override
public ExportDataVo exportFileStreams() {
ExportDataVo vo=new ExportDataVo();
vo.setFileName(System.currentTimeMillis() + ".xls");
WorkbookContext workbookCtx = WorkbookContextFactory.createWorkbook(true);
CellStyle center = workbookCtx.toNativeWorkbook().createCellStyle();
center.setWrapText(true);
CellStyle left = workbookCtx.toNativeWorkbook().createCellStyle();
SheetContext sheetCtx = workbookCtx.createSheet("角色列表");
RowContext top = sheetCtx.nextRow().skipCell().setRowHeight(40);
top.text("角色名", center).setColumnWidth(10);
top.text("角色编号", center).setColumnWidth(15);
top.text("父级id", center).setColumnWidth(15);
List<Role> roles = roleService.getRoles("");
for(int i=0;i<roles.size();i++){
Role role = roles.get(i);
RowContext tempSkipCell = sheetCtx.nextRow().skipCell().setRowHeight(25);
tempSkipCell.text(role.getRoleName(),center);
tempSkipCell.text(role.getRoleCode(),center);
tempSkipCell.text(role.getParentId(),center);
}
vo.setFileByte(workbookCtx.toNativeBytes());
return vo;
}
}
- 控制类
package org.sc.api.ps.controller;
import javax.servlet.http.HttpServletResponse;
import io.swagger.annotations.Api;
import io.swagger.annotations.ApiOperation;
import org.sc.api.ps.model.vo.ExportDataVo;
import org.sc.api.ps.service.ExcelService;
import org.sc.common.controller.BaseController;
import org.sc.common.model.vo.Response;
import org.sc.common.utils.web.ResponseUtil;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.http.HttpHeaders;
import org.springframework.http.HttpStatus;
import org.springframework.http.MediaType;
import org.springframework.http.ResponseEntity;
import org.springframework.web.bind.annotation.RequestBody;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestMethod;
import org.springframework.web.bind.annotation.RestController;
import org.springframework.web.multipart.MultipartFile;
/**
* spring boot集成poi实现Excel的导入导出
*
* @author lv
*/
@Api(value = "excel",description = "Excel导入导出")
@RestController
@RequestMapping(value = "/api/ps/excel")
public class ExcelController extends BaseController {
@Autowired
private ExcelService excelService;
@ApiOperation(value = "以Excel模板表导入角色信息")
@RequestMapping(value="/importRole",method = RequestMethod.POST)
public Response importRole(@RequestBody MultipartFile file) throws Exception {
if (file==null) {
return ResponseUtil.error("file不能为空");
}
return excelService.importRole(file);
}
@ApiOperation(value = "导出角色信息列表")
@RequestMapping(value="/export",method = RequestMethod.GET)
public Response export() throws Exception {
return ResponseUtil.ok(excelService.export());
}
@ApiOperation(value = "导出角色信息列表(返回文件二进制流)")
@RequestMapping(value="/exportFileStreams",method = RequestMethod.GET)
public ResponseEntity<byte[]> exportFileStreams() throws Exception {
ExportDataVo vo = excelService.exportFileStreams();
HttpHeaders headers = new HttpHeaders();
String fileName = new String(vo.getFileName().getBytes("UTF-8"), "iso-8859-1");
headers.setContentDispositionFormData("attachment", fileName);
headers.setContentType(MediaType.APPLICATION_OCTET_STREAM);
return new ResponseEntity<>(vo.getFileByte(), headers,HttpStatus.CREATED);
}
}
结尾…