Java使用easypoi快速导入导出的实现
作者：子_轩
这篇文章主要介绍了实现Java使用easypoi快速导入导出的实现，小编觉得挺不错的，现在分享给大家，也给大家做个参考。一起跟随小编过来看看吧
简介
easypoi功能如同名字easy,主打的功能就是容易,让一个没见接触过poi的人员就可以方便的写出Excel导入,导出,通过简单的注解和模板语言(熟悉的表达式语法),完成以前复杂的写法。
集成
pom 中引入依赖即可
<!--easypoi-->
<dependency>
<groupId>cn.afterturn</groupId>
<artifactId>easypoi-base</artifactId>
<version>3.0.3</version>
</dependency>
<dependency>
<groupId>cn.afterturn</groupId>
<artifactId>easypoi-web</artifactId>
<version>3.0.3</version>
</dependency>
<dependency>
<groupId>cn.afterturn</groupId>
<artifactId>easypoi-annotation</artifactId>
<version>3.0.3</version>
</dependency>
整合工具类 EasyPoiUtil
package cn.common.util;
import cn.afterturn.easypoi.excel.ExcelExportUtil;
import cn.afterturn.easypoi.excel.ExcelImportUtil;
import cn.afterturn.easypoi.excel.entity.ExportParams;
import cn.afterturn.easypoi.excel.entity.ImportParams;
import cn.afterturn.easypoi.excel.entity.enmus.ExcelType;
import cn.common.exception.ZXException;
import org.apache.poi.ss.usermodel.Workbook;
import org.springframework.web.multipart.MultipartFile;
import javax.servlet.http.HttpServletResponse;
import java.io.File;
import java.io.IOException;
import java.net.URLEncoder;
import java.util.List;
import java.util.Map;
import java.util.NoSuchElementException;
/**
* @author huangy
* @date 2019/6/28 14:57
*/
public class EasyPoiUtil {
/**
* 导出Excel，包括文件名以及表名。是否创建表头
*
* @param list 导出的实体类
* @param title 表头名称
* @param sheetName sheet表名
* @param pojoClass 映射的实体类
* @param isCreateHeader 是否创建表头
* @param fileName 文件名
* @param response
* @return
*/
public static void exportExcel(List<?> list, String title, String sheetName, Class<?> pojoClass, String fileName, boolean isCreateHeader, HttpServletResponse response){
ExportParams exportParams = new ExportParams(title, sheetName);
exportParams.setCreateHeadRows(isCreateHeader);
defaultExport(list, pojoClass, fileName, response, exportParams);
}
/**
* 导出Excel 默认格式 默认有创建表头
*/
public static void exportExcel(List<?> list, String title, String sheetName, Class<?> pojoClass,String fileName, HttpServletResponse response){
defaultExport(list, pojoClass, fileName, response, new ExportParams(title, sheetName));
}
/**
* map多sheet形式导出
* @param list
* @param fileName
* @param response
*/
public static void exportExcel(List<Map<String, Object>> list, String fileName, HttpServletResponse response){
defaultExport(list, fileName, response);
}
/**
* 常规默认导出方式
* @param list
* @param pojoClass
* @param fileName
* @param response
* @param exportParams
*/
private static void defaultExport(List<?> list, Class<?> pojoClass, String fileName, HttpServletResponse response, ExportParams exportParams) {
Workbook workbook = ExcelExportUtil.exportExcel(exportParams,pojoClass,list);
ExcelExportUtil.closeExportBigExcel();
if (workbook != null);
downLoadExcel(fileName, response, workbook);
}
/**
* 多sheet默认导出方式
* @param list
* @param fileName
* @param response
*/
private static void defaultExport(List<Map<String, Object>> list, String fileName, HttpServletResponse response) {
Workbook workbook = ExcelExportUtil.exportExcel(list, ExcelType.HSSF);
ExcelExportUtil.closeExportBigExcel();
if (workbook != null);
downLoadExcel(fileName, response, workbook);
}
/**
* 下载excel
* @param fileName
* @param response
* @param 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 ZXException(e.getMessage());
}
}
/**
* 导入 文件路径形式
* @param filePath
* @param titleRows
* @param headerRows
* @param pojoClass
* @param <T>
* @return
*/
public static <T> List<T> importExcel(String filePath,Integer titleRows,Integer headerRows, Class<T> pojoClass){
if (StringUtils.isBlank(filePath)){
return null;
}
ImportParams params = new ImportParams();
params.setTitleRows(titleRows);
params.setHeadRows(headerRows);
List<T> list = null;
try {
list = ExcelImportUtil.importExcel(new File(filePath), pojoClass, params);
}catch (NoSuchElementException e){
throw new ZXException("模板不能为空");
} catch (Exception e) {
e.printStackTrace();
throw new ZXException(e.getMessage());
}
return list;
}
/**
* 导入 MultipartFile 形式
* @param file
* @param titleRows
* @param headerRows
* @param pojoClass
* @param <T>
* @return
*/
public static <T> List<T> importExcel(MultipartFile file, Integer titleRows, Integer headerRows, Class<T> pojoClass){
if (file == null){
return null;
}
ImportParams params = new ImportParams();
params.setTitleRows(titleRows);
params.setHeadRows(headerRows);
List<T> list = null;
try {
list = ExcelImportUtil.importExcel(file.getInputStream(), pojoClass, params);
}catch (NoSuchElementException e){
throw new ZXException("excel文件不能为空");
} catch (Exception e) {
throw new ZXException(e.getMessage());
}
return list;
}
}
使用示例
实体类
public class BlackListExport {
@Excel(name = "客户姓名", width = 15, orderNum = "2")
private String name;
@Excel(name = "备注", width = 10, orderNum = "1")
private String remark;
@Excel(name = "手机号", width = 15, orderNum = "0")
private String phone;
public String getName() {
return name;
}
public void setName(String name) {
this.name = name;
}
public String getRemark() {
return remark;
}
public void setRemark(String remark) {
this.remark = remark;
}
public String getPhone() {
return phone;
}
public void setPhone(String phone) {
this.phone = phone;
}
public BlackListExport() {
}
public BlackListExport(String name, String remark, String phone) {
this.name = name;
this.remark = remark;
this.phone = phone;
}
}
接口
@ApiOperation(value = "easyPoiUtil 导出测试")
@GetMapping(value = "/poi/export1")
public void export1(HttpServletResponse response){
List<BlackListExport> list=new ArrayList<>();
for(int i=0;i<10000;i++){
list.add(new BlackListExport(i+"",i+"",i+""));
}
EasyPoiUtil.exportExcel(list,"zx","huangy",BlackListExport.class,"zx.xls",response);
}
/**
* 如果填充不同sheet得data数据列表使用相同得list对象进行填充的话，
* 会出现第一次填充得sheet有数据，后续其他使用相同list对象进行data填充得sheet没有数据展示。
* @param response
*/
@ApiOperation(value = "多sheet 导出测试")
@GetMapping(value = "/poi/export2")
public void export2(HttpServletResponse response){
// 查询数据,此处省略
List list = new ArrayList<>();
list.add(new BlackListExport("姓名1","备注1","手机1")) ;
list.add(new BlackListExport("姓名2","备注2","手机2")) ;
list.add(new BlackListExport("姓名3","备注3","手机3")) ;
List list2 = new ArrayList<>();
list2.add(new BlackListExport("姓名-1","备注-1","手机-1")) ;
list2.add(new BlackListExport("姓名-2","备注-2","手机-2")) ;
list2.add(new BlackListExport("姓名-3","备注-3","手机-3")) ;
List<Map<String,Object>> sheetsList = new ArrayList<>();
for(int i=1;i<=4;i++){
// 设置导出配置
// 创建参数对象（用来设定excel得sheet得内容等信息）
ExportParams params = new ExportParams() ;
// 设置sheet得名称
params.setSheetName("表格"+i);
//创建sheet使用的map
Map<String,Object> dataMap = new HashMap<>();
// title的参数为ExportParams类型，目前仅仅在ExportParams中设置了sheetName
dataMap.put("title",params) ;
// 模版导出对应得实体类型
dataMap.put("entity",BlackListExport.class) ;
// sheet中要填充得数据
if(i%2==0){
dataMap.put("data",list) ;
}else {
dataMap.put("data",list2) ;
}
sheetsList.add(dataMap);
}
EasyPoiUtil.exportExcel(sheetsList,"hy.xls",response);
}
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