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com.github.zzlhy.main.ExcelExport Maven / Gradle / Ivy
package com.github.zzlhy.main;
import com.github.zzlhy.entity.Col;
import com.github.zzlhy.entity.ExcelType;
import com.github.zzlhy.entity.TableParam;
import com.github.zzlhy.func.ConvertValue;
import com.github.zzlhy.func.GeneratorDataHandler;
import com.github.zzlhy.util.Utils;
import org.apache.poi.hssf.usermodel.HSSFWorkbook;
import org.apache.poi.ss.usermodel.*;
import org.apache.poi.xssf.streaming.SXSSFWorkbook;
import org.apache.poi.xssf.usermodel.XSSFWorkbook;
import java.beans.IntrospectionException;
import java.beans.PropertyDescriptor;
import java.lang.reflect.InvocationTargetException;
import java.lang.reflect.Method;
import java.math.BigDecimal;
import java.text.SimpleDateFormat;
import java.time.LocalDate;
import java.time.LocalDateTime;
import java.time.ZoneId;
import java.time.ZonedDateTime;
import java.util.Date;
import java.util.List;
import java.util.Map;
/**
* Excel 导出 (支持大量数据导出)
* Created by Administrator on 2018-10-11.
*/
public class ExcelExport {
/**
* 数据导出 -- 对象方式 (说明:普通导出,数据量较少情况导出)
* @param tableParam Excel参数对象
* @return
*/
public static Workbook exportExcelByObject(TableParam tableParam, List data) throws InvocationTargetException, IllegalAccessException, IntrospectionException {
/*创建Workbook和Sheet*/
Workbook workbook;
if(ExcelType.XLSX.equals(tableParam.getExcelType())){
workbook = new XSSFWorkbook();
}else if(ExcelType.XLS.equals(tableParam.getExcelType())){
workbook = new HSSFWorkbook();
}else {
workbook = new SXSSFWorkbook();
}
/*创建Workbook和Sheet*/
Sheet sheet = workbook.createSheet(tableParam.getSheetName());//创建工作表(Sheet)
//开始行
Integer startRow = tableParam.getStartRow();
//创建标题
if(tableParam.getCreateHeadRow()){
/*创建标题行*/
Row row = sheet.createRow(startRow);// 创建行,从0开始
//标题设置
setHeadRow(workbook,row,tableParam);
}
//当前数据处理到的行数,开始时为标题行的下一行（每个sheet重新计算）
int currentRow = startRow+1;
addRows(sheet, currentRow, tableParam, data);
return workbook;
}
/**
* 数据导出 -- Map方式 (说明:普通导出,数据量较少情况导出)
* @param tableParam Excel参数对象
* @return
*/
public static Workbook exportExcelByMap(TableParam tableParam, List> data) throws InvocationTargetException, IllegalAccessException, IntrospectionException {
/*创建Workbook和Sheet*/
Workbook workbook;
if(ExcelType.XLSX.equals(tableParam.getExcelType())){
workbook = new XSSFWorkbook();
}else if(ExcelType.XLS.equals(tableParam.getExcelType())){
workbook = new HSSFWorkbook();
}else {
workbook = new SXSSFWorkbook();
}
/*创建Workbook和Sheet*/
Sheet sheet = workbook.createSheet(tableParam.getSheetName());//创建工作表(Sheet)
//开始行
Integer startRow = tableParam.getStartRow();
//创建标题
if(tableParam.getCreateHeadRow()){
/*创建标题行*/
Row row = sheet.createRow(startRow);// 创建行,从0开始
//标题设置
setHeadRow(workbook,row,tableParam);
}
//当前数据处理到的行数,开始时为标题行的下一行（每个sheet重新计算）
int currentRow = startRow+1;
addRowsByMap(sheet, currentRow, tableParam, data);
return workbook;
}
/**
* 大量数据导出 -- 对象方式 (说明:支持百万数据导出,支持多sheet写入，减少内存消耗)
* @param tableParam Excel参数对象
* @param total 数据总条数
* @param generatorDataHandler 生成数据的方法
* @return
*/
public static SXSSFWorkbook exportExcelBigData(TableParam tableParam, long total,GeneratorDataHandler generatorDataHandler) throws InvocationTargetException, IllegalAccessException, IntrospectionException {
/*创建Workbook*/
SXSSFWorkbook workbook = new SXSSFWorkbook(100);//在内存中保持100行，超过100行将被刷新到磁盘
//每个sheet允许写入的数据条数
int sheetDataTotal = tableParam.getSheetDataTotal();
//sheet个数
long sheetCount = 1;
//判断数据总行数,决定是否创建多个sheet 每超过10W条则新加一个sheet
if(total > sheetDataTotal){
//计算需要创建sheet的个数
sheetCount = total/sheetDataTotal;
if(total%sheetDataTotal != 0L){
sheetCount+=1;
}
}
//分页查询时的每页条数,固定1000条,外部查询时也需要每次为1000条的返回
int pageSize = 1000;
//总页数计算
long page = total / pageSize;
//当前页码
int currentPage = 0;
//循环创建sheet
for (int j = 0; j < sheetCount; j++) {
//创建工作表(Sheet)
Sheet sheet = workbook.createSheet(tableParam.getSheetName()+j);
//开始写入的行号
Integer startRow = tableParam.getStartRow();
//创建标题行
if(tableParam.getCreateHeadRow()){
/*创建标题行*/
Row row = sheet.createRow(startRow);// 创建行,从0开始
//标题设置
setHeadRow(workbook,row,tableParam);
}
//当前数据处理到的行数,开始时为标题行的下一行（每个sheet重新计算）
int currentRow = startRow+1;
//本次执行了多少页
int index = 0;
List list;
//开始循环加入数据(分页查询数据)
for (int i = currentPage; i <= page; i++) {
list = generatorDataHandler.generatorData(i,pageSize);
int tempRow = addRows(sheet, currentRow, tableParam, list);
list.clear();
currentRow = tempRow;
//如果超过了限制的行数则跳出,进行新的sheet写入
if(currentRow >= sheetDataTotal ){
break;
}
index++;
}
currentPage+=index;
}
return workbook;
}
/**
* 新增数据行 说明：传入的是对象集合
* @param sheet
* @param currentRow 当前处理到的行号
* @param tableParam 配置参数
* @param data 数据
* @return 当前处理到的行号
*/
private static int addRows(Sheet sheet, int currentRow, TableParam tableParam, List data) throws InvocationTargetException, IllegalAccessException, IntrospectionException {
//创建数据
for(int k = 0; k propertyType = propertyDescriptor.getPropertyType();
//执行
Object result = readMethod.invoke(data.get(k));
//设置列宽
sheet.setColumnWidth(j,tableParam.getCols().get(j).getWidth()*256);
// 创建行的单元格
Cell cell = _row.createCell(j);
String format = tableParam.getCols().get(j).getFormat();//获取日期的格式化的格式
ConvertValue convertValue = tableParam.getCols().get(j).getConvertValue();//需要转换值的方法对象
setCell(cell,result,format,convertValue);
}
currentRow++;
}
return currentRow;
}
/**
* 新增数据行 说明：传入的是Map集合
* @param sheet
* @param currentRow 当前处理到的行号(从哪行开始创建行)
* @param tableParam 配置参数
* @param data 数据
* @return 当前处理到的行号
*/
private static int addRowsByMap(Sheet sheet, int currentRow, TableParam tableParam, List> data) throws InvocationTargetException, IllegalAccessException, IntrospectionException {
//创建数据
for(int k = 0; k columnParams = tableParam.getCols();
for(int i=0;i
