寫在前面
EasyExcel是阿里推出的一款高性能的開源excel讀寫框架,具體的框架介紹這里就不再提了,有興趣的同學點擊下面的地址鏈接去github上看。筆者發現目前網上很多介紹easyexcel博客或文章都是基於1.1.2-beta5版本進行講解的,故筆者整理了一個適用於該版本的工具類,方便自己使用。實際主要是懶得記對應的API,並且匹配自己平時的編程習慣。有需要的小伙伴自取。
easyexcel開源地址:https://github.com/alibaba/easyexcel
引入依賴
<dependency>
<groupId>com.alibaba</groupId>
<artifactId>easyexcel</artifactId>
<version>1.1.2-beta5</version>
</dependency>
工具類
import com.alibaba.excel.EasyExcelFactory;
import com.alibaba.excel.ExcelWriter;
import com.alibaba.excel.context.AnalysisContext;
import com.alibaba.excel.event.AnalysisEventListener;
import com.alibaba.excel.metadata.BaseRowModel;
import com.alibaba.excel.metadata.Sheet;
import com.alibaba.excel.metadata.Table;
import com.alibaba.excel.support.ExcelTypeEnum;
import lombok.extern.slf4j.Slf4j;
import javax.servlet.http.HttpServletResponse;
import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;
import java.net.URLEncoder;
import java.util.ArrayList;
import java.util.List;
/**
* EasyExcel工具類
* @author jwhappy
* @date 2020/4/21
*/
@Slf4j
public class EasyExcelUtil
{
/**
* 無模板讀取(從sheet1的第1行開始讀)
* @param inputStream
* @return List<List<String>>
*/
public static List<Object> read(InputStream inputStream){
return EasyExcelFactory.read(inputStream, new Sheet(1, 0));
}
/**
* 無模板讀取(自己指定從sheet1的哪一行開始讀)
* @param inputStream
* @param headLineMun 表頭占的行數,從0開始
* @return List<List<String>>
*/
public static List<Object> read(InputStream inputStream, Integer headLineMun){
return EasyExcelFactory.read(inputStream, new Sheet(1, headLineMun));
}
/**
* 無模板讀取(自己指定sheet和開始的行)
* 返回 List<List<String>>
* @param inputStream
* @param sheetNo sheet頁號,從1開始
* @param headLineMun 表頭占的行數,從0開始
* @return List<List<String>>
*/
public static List<Object> read(InputStream inputStream, Integer sheetNo, Integer headLineMun){
return EasyExcelFactory.read(inputStream, new Sheet(sheetNo, headLineMun));
}
/**
* 按模板讀取(從sheet1的第2行開始讀取)
* @param inputStream
* @param clazz 模板類,需要繼承BaseRowModel類,字段用@ExcelProperty注解
* @return List<Object>, Object對應具體的clazz類
*/
public static List<Object> read(InputStream inputStream, final Class<? extends BaseRowModel> clazz){
return EasyExcelFactory.read(inputStream, new Sheet(1, 1, clazz));
}
/**
* 按模板讀取(從指定sheet的第2行開始讀)
* @param inputStream
* @param clazz 模板類,需要繼承BaseRowModel類,字段用@ExcelProperty注解
* @param sheetNo sheet頁號,從1開始
* @return List<Object>, Object對應具體的clazz類
*/
public static List<Object> read(InputStream inputStream, final Class<? extends BaseRowModel> clazz, Integer sheetNo){
return EasyExcelFactory.read(inputStream, new Sheet(sheetNo, 1, clazz));
}
/**
* 按模板讀取(自定義sheet和表頭行數)
* @param inputStream
* @param clazz 模板類,需要繼承BaseRowModel類,字段用@ExcelProperty注解
* @param sheetNo sheet頁號,從1開始
* @param headLineMun 表頭占的行數,從0開始
* @return List<Object>, Object對應具體的clazz類
*/
public static List<Object> read(InputStream inputStream, final Class<? extends BaseRowModel> clazz, Integer sheetNo, Integer headLineMun){
return EasyExcelFactory.read(inputStream, new Sheet(sheetNo, headLineMun, clazz));
}
/**
* 按模板讀取(從sheet1的第2行開始讀取)
* 1000行以上的數據建議用這個讀取
* @param inputStream
* @param clazz 模板類,需要繼承BaseRowModel類,字段用@ExcelProperty注解
* @param <T> 模板類泛型
* @return List<T>
*/
public static <T extends BaseRowModel> List<T> readModel(InputStream inputStream, final Class<? extends BaseRowModel> clazz){
ExcelListener excelListener = new ExcelListener();
EasyExcelFactory.readBySax(inputStream, new Sheet(1, 1, clazz), excelListener);
return excelListener.getRows();
}
/**
* 按模板讀取(從指定sheet的第2行開始讀)
* 1000行以上的數據建議用這個讀取
* @param inputStream
* @param clazz 模板類,需要繼承BaseRowModel類,字段用@ExcelProperty注解
* @param sheetNo sheet頁號,從1開始
* @param <T> 模板類泛型
* @return List<T>
*/
public static <T extends BaseRowModel> List<T> readModel(InputStream inputStream, final Class<? extends BaseRowModel> clazz, Integer sheetNo){
ExcelListener excelListener = new ExcelListener();
EasyExcelFactory.readBySax(inputStream, new Sheet(sheetNo, 1, clazz), excelListener);
return excelListener.getRows();
}
/**
* 按模板讀取(自定義sheet和表頭行)
* 1000行以上的數據建議用這個讀取
* @param inputStream
* @param clazz 模板類,需要繼承BaseRowModel類,字段用@ExcelProperty注解
* @param sheetNo sheet頁號,從1開始
* @param headLineMun 表頭占的行數,從0開始
* @param <T> 模板類泛型
* @return List<T>
*/
public static <T extends BaseRowModel> List<T> readModel(InputStream inputStream, final Class<? extends BaseRowModel> clazz, Integer sheetNo, Integer headLineMun){
ExcelListener excelListener = new ExcelListener();
EasyExcelFactory.readBySax(inputStream, new Sheet(sheetNo, headLineMun, clazz), excelListener);
return excelListener.getRows();
}
/**
* 按模板寫入(寫入sheet1,表頭占第一行)
* @param outputStream
* @param data 寫入的數據(模板對象List)
* @param clazz 模板類,需要繼承BaseRowModel類,字段用@ExcelProperty注解
*/
public static void writeModel(OutputStream outputStream, List<? extends BaseRowModel> data, final Class<? extends BaseRowModel> clazz){
ExcelWriter excelWriter = EasyExcelFactory.getWriter(outputStream);
Sheet sheet = new Sheet(1, 1, clazz);
excelWriter.write(data, sheet);
excelWriter.finish();
}
/**
* 按模板寫入(指定sheet,表頭占第一行)
* @param outputStream
* @param data 寫入的數據(模板對象List)
* @param clazz 模板類,需要繼承BaseRowModel類,字段用@ExcelProperty注解
* @param sheetNo sheet頁號,從1開始
*/
public static void writeModel(OutputStream outputStream, List<? extends BaseRowModel> data, final Class<? extends BaseRowModel> clazz, Integer sheetNo){
ExcelWriter excelWriter = EasyExcelFactory.getWriter(outputStream);
Sheet sheet = new Sheet(sheetNo, 1, clazz);
excelWriter.write(data, sheet);
excelWriter.finish();
}
/**
* 按模板寫入(指定sheet頁和sheet名稱,指定表頭行數)
* @param outputStream
* @param data 寫入的數據(模板對象List)
* @param clazz 模板類,需要繼承BaseRowModel類,字段用@ExcelProperty注解
* @param headLineMun 表頭占的行數,從0開始
* @param sheetNo sheet頁號,從1開始
* @param sheetName sheet名稱
*/
public static void writeModel(OutputStream outputStream, List<? extends BaseRowModel> data, final Class<? extends BaseRowModel> clazz, Integer headLineMun, Integer sheetNo, String sheetName){
ExcelWriter excelWriter = EasyExcelFactory.getWriter(outputStream);
Sheet sheet = new Sheet(sheetNo, headLineMun, clazz);
sheet.setSheetName(sheetName);
excelWriter.write(data, sheet);
excelWriter.finish();
}
/**
* 無模板寫入(寫入sheet1,表頭占第一行)
* @param outputStream
* @param data 寫入的數據(List<List<Object>>)
* @param table 表設置,可以設置表頭字段,以及表的樣式設置
*/
public static void write(OutputStream outputStream, List<List<Object>> data, Table table){
ExcelWriter excelWriter = EasyExcelFactory.getWriter(outputStream);
Sheet sheet = new Sheet(1, 0);
excelWriter.write1(data, sheet, table);
excelWriter.finish();
}
/**
* 無模板寫入(指定sheet,表頭占第一行)
* @param outputStream
* @param data 寫入的數據(List<List<Object>>)
* @param table 表設置,可以設置表頭字段,以及表的樣式設置
* @param sheetNo sheet頁號,從1開始
*/
public static void write(OutputStream outputStream, List<List<Object>> data, Table table, Integer sheetNo){
ExcelWriter excelWriter = EasyExcelFactory.getWriter(outputStream);
Sheet sheet = new Sheet(sheetNo, 0);
excelWriter.write1(data, sheet, table);
excelWriter.finish();
}
/**
* 無模板寫入(指定sheet頁和sheet名稱,指定表頭行數)
* @param outputStream
* @param data 寫入的數據(List<List<Object>>)
* @param table 表設置,可以設置表頭字段,以及表的樣式設置
* @param headLineMun 表頭占的行數,從0開始
* @param sheetNo sheet頁號,從1開始
* @param sheetName sheet名稱
*/
public static void write(OutputStream outputStream, List<List<Object>> data, Table table, Integer headLineMun, Integer sheetNo, String sheetName){
ExcelWriter excelWriter = EasyExcelFactory.getWriter(outputStream);
Sheet sheet = new Sheet(sheetNo, headLineMun);
sheet.setSheetName(sheetName);
excelWriter.write1(data, sheet, table);
excelWriter.finish();
}
/**
* 多個sheet頁的數據鏈式寫入
* ExcelUtil.writeWithSheets(outputStream)
* .writeModel( Collections.singletonList(excelModel), ExcelModel.class, "sheet1Name")
* .write(data,table,"sheet2Name")
* .finish();
* @param outputStream
* @return
*/
public static EasyExcelWriterFactory writeWithSheets(OutputStream outputStream){
EasyExcelWriterFactory excelWriter = new EasyExcelWriterFactory(outputStream, ExcelTypeEnum.XLSX);
return excelWriter;
}
/**
* 多個sheet頁的數據鏈式寫入
* ExcelUtil.writeWithSheets(response, exportFileName)
* .writeModel( Collections.singletonList(excelModel), ExcelModel.class, "sheet1Name")
* .write(data,table,"sheet2Name")
* .finish();
* @param response
* @param exportFileName 導出文件名
* @return
*/
public static EasyExcelWriterFactory writeWithSheetsWeb(HttpServletResponse response, String exportFileName) throws IOException
{
//添加響應頭信息
response.setContentType("application/vnd.ms-excel");
response.setCharacterEncoding("utf-8");
// 這里URLEncoder.encode可以防止中文亂碼
String fileName = URLEncoder.encode(exportFileName, "UTF-8");
response.setHeader("Content-disposition", "attachment;filename=" + fileName + ".xlsx");
EasyExcelWriterFactory excelWriter = new EasyExcelWriterFactory(response.getOutputStream(), ExcelTypeEnum.XLSX);
return excelWriter;
}
}
@Slf4j
class ExcelListener<T extends BaseRowModel> extends AnalysisEventListener<T>
{
private final List<T> rows = new ArrayList<>();
@Override
public void invoke(T object, AnalysisContext context) {
rows.add(object);
}
@Override
public void doAfterAllAnalysed(AnalysisContext context) {
log.info("read {} rows", rows.size());
}
public List<T> getRows() {
return rows;
}
}
import com.alibaba.excel.ExcelWriter;
import com.alibaba.excel.metadata.BaseRowModel;
import com.alibaba.excel.metadata.Sheet;
import com.alibaba.excel.metadata.Table;
import com.alibaba.excel.support.ExcelTypeEnum;
import java.io.IOException;
import java.io.OutputStream;
import java.util.List;
/**
* 自定義EasyExcel寫工廠
*/
public class EasyExcelWriterFactory extends ExcelWriter
{
private OutputStream outputStream;
private int sheetNo = 1;
public EasyExcelWriterFactory(OutputStream outputStream, ExcelTypeEnum typeEnum) {
super(outputStream, typeEnum);
this.outputStream = outputStream;
}
/**
* 鏈式按模板寫入
* @param data
* @param clazz
* @param sheetName
* @return
*/
public EasyExcelWriterFactory writeModel(List<? extends BaseRowModel> data, final Class<? extends BaseRowModel> clazz, String sheetName){
Sheet sheet = new Sheet(this.sheetNo++, 0, clazz);
sheet.setSheetName(sheetName);
this.write(data, sheet);
return this;
}
/**
* 鏈式無模板寫入
* @param data
* @param table
* @param sheetName
* @return
*/
public EasyExcelWriterFactory write(List<List<Object>> data, Table table, String sheetName){
Sheet sheet = new Sheet(this.sheetNo++, 0);
sheet.setSheetName(sheetName);
this.write1(data, sheet, table);
return this;
}
@Override
public void finish() {
super.finish();
try {
outputStream.flush();
} catch (IOException e) {
e.printStackTrace();
}
}
}