使用EasyExcel添加Excel数据
一、导入excel代码
1、pom文件：
com.alibaba
easyexcel
1.1.2-beta4
2、实体类：
@Data
@EqualsAndHashCode(callSuper = true)
public class UploadChildProject extends BaseRowModel{
//这里index=0是指定顺序
@ExcelProperty(value = {"序号","项目名称","物业类型","省","市","区"},index = 0)
private String serialNumber;
@ExcelProperty(value = {"序号","项目名称","物业类型","省","市","区"},index = 1)
private String buildingName;
@ExcelProperty(value = {"序号","项目名称","物业类型","省","市","区"},index = 2)
private String propertyTypeName;
private String propertyTypeCode;
@ExcelProperty(value = {"序号","项目名称","物业类型","省","市","区"},index = 3)
private String provinceName;
/**
* 省code
*/
private String provinceCode;
@ExcelProperty(value = {"序号","项目名称","物业类型","省","市","区"},index = 4)
private String cityName;
/**
* 城市code
*/
private String cityCode;
@ExcelProperty(value = {"序号","项目名称","物业类型","省","市","区"},index = 5)
private String areaName;
/**
* 区code
*/
private String areaCode;
/**
* 导入失败行的备注
*/
private String remarks;
/**
* 是否已经标注错误原因；true 已标注 false 未标注
*/
private boolean flag;
}
3、导入代码：
/**
* 导入
* @param file
* @return
*/
@PostMapping("/file/upload")
public R importChildProjects(@Param( "file" ) MultipartFile file){
if (null == file ) {
R.fail("文件为空，请核对后重新导入！");
}else if(file.isEmpty()){
R.fail("文件为空，请核对后重新导入！");
}
String originalFilename = file.getOriginalFilename();
if ( !StringUtils.endsWithIgnoreCase(originalFilename, ExcelTypeEnum.XLSX.getValue())) {
R.fail("请使用模板导入！");
}
List uploadChildProjectList = null;
try {
//需要指定sheetNo
uploadChildProjectList = EasyExcelUtils.readByModel(file.getInputStream(), UploadChildProject.class, 4, 1);
System.out.println("sheet4"+ JSON.toJSONString(uploadChildProjectList));
} catch (Exception e) {
log.error( "导入子项目失败：",e );
}
return null;
}
遇坑：
excel使用wps打开，在隐藏sheet并加上保护工作簿的密码后，导入时会找不到指定的sheetNo；
excel使用office打开，在隐藏sheet并加上保护工作簿的密码后，导入时正常！
都取消保护工作簿的密码后，导入时正常！
总结：wps是免费产品坑多；建议使用office；
二、在已存在的excel中添加数据：
业务需求：需要在已经存在的excel模板中添加数据，并返回给前端；
代码：
@GetMapping("/addExcel2")
public void downloadFile(HttpServletResponse response) throws IOException {
OutputStream outputStream = null;
try {
response.setContentType("application/x-msdownload");
String name = "xxxx.xlsx";
// 设置头消息
response.setHeader("Content-Disposition", "attachment;filename=" + new String(name.getBytes("utf-8"), "iso-8859-1"));
outputStream = response.getOutputStream();
Sheet sheet2 = new Sheet(4,3);
sheet2.setStartRow( 0 );
EasyExcelUtils.onlineExcel( getLists(data()),sheet2 ,outputStream,nationalExcelMould);
}catch (Exception e ){
log.error( "导入错误：",e );
}finally {
if (outputStream != null) {
outputStream.flush();
outputStream.close();
}
}
}
工具类：
import com.alibaba.excel.EasyExcelFactory;
import com.alibaba.excel.ExcelReader;
import com.alibaba.excel.ExcelWriter;
import com.alibaba.excel.metadata.BaseRowModel;
import com.alibaba.excel.metadata.Sheet;
import com.alibaba.excel.support.ExcelTypeEnum;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;
import java.net.URL;
import java.util.ArrayList;
import java.util.List;
/***
* easyExcel文件操作类
*/
public class EasyExcelUtils {
public static void onlineExcel(List> data,Sheet sheet,OutputStream out,String url){
try {
//直接读取线上的excel
InputStream inputStream = new URL( url ).openStream();
ExcelWriter writer = EasyExcelFactory.getWriterWithTemp(inputStream,out,ExcelTypeEnum.XLSX,true);
writer.write0(data, sheet);
writer.finish();
} catch (IOException e) {
e.printStackTrace();
}
}
public static void writeWithoutHead() throws IOException{
InputStream inputStream = Thread.currentThread().getContextClassLoader().getResourceAsStream(""+"area.xlsx" );
OutputStream out = new FileOutputStream("area2.xlsx");
ExcelWriter writer = EasyExcelFactory.getWriterWithTemp(inputStream,out,ExcelTypeEnum.XLSX,true);
//写第一个sheet, sheet1 数据全是List 无模型映射关系
Sheet sheet1 = new Sheet(4, 3);
sheet1.setStartRow(0);
List> data = new ArrayList<>();
List test1 = new ArrayList<>();
test1.add("123");
test1.add("1234");
test1.add("住宅");
test1.add("福建省");
test1.add("厦门市");
test1.add("海沧区");
data.add(test1);
writer.write0(data, sheet1);
writer.finish();
}
/**
* 导出文件
*/
public static void writeByModel(List data, Sheet sheet,OutputStream outputStream){
ExcelWriter excelWriter = new ExcelWriter(outputStream, ExcelTypeEnum.XLSX, true);
excelWriter.write(data,sheet);
excelWriter.finish();
}
/**
* 读取文件
* @param inputStream 需解析文件的流
* @param clazz 继承excel文件解析基础类BaseRowModel 的子类
* @param sheetNo 工作表编号
* @param headLineMun 行号，从第几行开始解析
* @return
*/
public static List readByModel(InputStream inputStream,Class clazz,int sheetNo, int headLineMun){
ExcelTypeEnum excelTypeEnum = ExcelTypeEnum.valueOf(inputStream);
// 解析每行结果在listener中处理
EasyExcelListener listener = new EasyExcelListener<>();
ExcelReader excelReader = new ExcelReader(inputStream, excelTypeEnum, null, listener);
//默认只有一列表头
excelReader.read(new Sheet(sheetNo,headLineMun,clazz));
return listener.getDataList();
}
/**
* 多sheet导出文件
*/
public static void writeMultiSheetByModel(List data, List sheets,OutputStream outputStream){
ExcelWriter excelWriter = new ExcelWriter(outputStream, ExcelTypeEnum.XLSX, true);
sheets.forEach(sheet -> {
excelWriter.write(data,sheet);
});
excelWriter.finish();
}
/**
* 多sheet读取文件
* @return
*/
public static EasyExcelListener readMultiSheetByModel(InputStream inputStream,Class clazz,ExcelTypeEnum excelTypeEnum, int headLineMun){
// 解析每行结果在listener中处理
EasyExcelListener listener = new EasyExcelListener<>();
ExcelReader excelReader = new ExcelReader(inputStream, excelTypeEnum, null, listener);
List sheets = excelReader.getSheets();
sheets.forEach(sheet -> {
sheet.setHeadLineMun(headLineMun);
sheet.setClazz(clazz);
excelReader.read(sheet);
});
return listener;
}
/**
* 获取ExcelReader
* @return
*/
public static ExcelReader getExcelReader(InputStream inputStream, ExcelTypeEnum excelTypeEnum,EasyExcelListener listener){
// 解析每行结果在listener中处理
ExcelReader excelReader = new ExcelReader(inputStream, excelTypeEnum, null, listener);
return excelReader;
}
}