package com.pigmis.common.utils;
import com.google.common.base.Strings;
import com.pigmis.utils.ReflexUtil;
import lombok.Data;
import org.apache.poi.hssf.usermodel.*;
import org.apache.poi.hssf.util.HSSFColor;
import org.apache.poi.ss.util.CellRangeAddress;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import java.io.File;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.OutputStream;
import java.math.BigDecimal;
import java.text.ParseException;
import java.text.SimpleDateFormat;
import java.util.Date;
import java.util.List;
import java.util.Locale;
@Data
public class ExcelExportUtil<T> {
//表头
private String title;
//各个列的表头
private List<String> heardList;
//各个列的元素key值
private List<String> heardKey;
//各个列的对其方式
private List<String> align;
//需要填充的数据信息
private List<T> data;
//字体大小
private int fontSize = 14;
//行高
private int rowHeight = 30;
//列宽
private int columWidth = 200;
//工作表
private String sheetName = "sheet1";
/**
* 开始导出数据信息
*
* @return
*/
public String exportExport(HttpServletRequest request, HttpServletResponse response) throws IOException {
//检查参数配置信息
checkConfig();
//创建工作簿
HSSFWorkbook wb = new HSSFWorkbook();
//创建工作表
HSSFSheet wbSheet = wb.createSheet(this.sheetName);
//设置默认行宽
wbSheet.setDefaultColumnWidth(20);
// 标题样式(加粗,垂直居中)
HSSFCellStyle cellStyle = wb.createCellStyle();
cellStyle.setAlignment(HSSFCellStyle.ALIGN_CENTER);//水平居中
HSSFFont fontStyle = wb.createFont();
fontStyle.setBoldweight(HSSFFont.BOLDWEIGHT_BOLD);
fontStyle.setFontHeightInPoints((short)16); //设置标题字体大小
cellStyle.setFont(fontStyle);
//在第0行创建rows (表标题)
HSSFRow title = wbSheet.createRow((int) 0);
title.setHeightInPoints(30);//行高
HSSFCell cellValue = title.createCell(0);
cellValue.setCellValue(this.title);
cellValue.setCellStyle(cellStyle);
wbSheet.addMergedRegion(new CellRangeAddress(0,0,0,(this.heardList.size()-1)));
//设置表头样式,表头居中
HSSFCellStyle style = wb.createCellStyle();
//设置单元格样式
style.setAlignment(HSSFCellStyle.ALIGN_CENTER);
style.setVerticalAlignment(HSSFCellStyle.VERTICAL_CENTER);
//设置字体
HSSFFont font = wb.createFont();
font.setFontHeightInPoints((short) this.fontSize);
style.setFont(font);
//在第1行创建rows
HSSFRow row = wbSheet.createRow((int) 1);
//设置列头元素
HSSFCell cellHead = null;
for (int i = 0; i < heardList.size(); i++) {
cellHead = row.createCell(i);
cellHead.setCellValue(heardList.get(i));
cellHead.setCellStyle(style);
}
//设置每格数据的样式 (字体红色)
HSSFCellStyle cellParamStyle = wb.createCellStyle();
HSSFFont ParamFontStyle = wb.createFont();
cellParamStyle.setAlignment(HSSFCellStyle.ALIGN_CENTER);
cellParamStyle.setVerticalAlignment(HSSFCellStyle.VERTICAL_CENTER);
ParamFontStyle.setColor(HSSFColor.DARK_RED.index); //设置字体颜色 (红色)
ParamFontStyle.setFontHeightInPoints((short) this.fontSize);
cellParamStyle.setFont(ParamFontStyle);
//设置每格数据的样式2(字体蓝色)
HSSFCellStyle cellParamStyle2 = wb.createCellStyle();
cellParamStyle2.setAlignment(HSSFCellStyle.ALIGN_CENTER);
cellParamStyle2.setVerticalAlignment(HSSFCellStyle.VERTICAL_CENTER);
HSSFFont ParamFontStyle2 = wb.createFont();
ParamFontStyle2.setColor(HSSFColor.BLUE.index); //设置字体颜色 (蓝色)
ParamFontStyle2.setFontHeightInPoints((short) this.fontSize);
cellParamStyle2.setFont(ParamFontStyle2);
//开始写入实体数据信息
int a = 2;
for (int i = 0; i < data.size(); i++) {
HSSFRow roww = wbSheet.createRow((int) a);
Object map = data.get(i);
HSSFCell cell = null;
for (int j = 0; j < heardKey.size(); j++) {
cell = roww.createCell(j);
//设置左右对齐
// if (align.get(j).equals("left")){
// style.setAlignment(HSSFCellStyle.ALIGN_RIGHT);
// }else if(align.get(j).equals("right")){
// style.setAlignment(HSSFCellStyle.ALIGN_LEFT);
// }
cell.setCellStyle(style);
Object valueObject = ReflexUtil.getFieldValueByName(heardKey.get(j),map);
String value = null;
if (valueObject == null) {
valueObject = "";
}
if (valueObject instanceof String) {
//取出的数据是字符串直接赋值
value = (String) valueObject;
} else if (valueObject instanceof Integer) {
//取出的数据是Integer
value = String.valueOf(((Integer) (valueObject)).floatValue());
} else if (valueObject instanceof BigDecimal) {
//取出的数据是BigDecimal
value = String.valueOf(((BigDecimal) (valueObject)).floatValue());
}else if (valueObject instanceof Date){
Date date = parse(valueObject.toString(), "EEE MMM dd HH:mm:ss zzz yyyy", Locale.US);
String time = format(date, "yyyy-MM-dd", Locale.CHINA);
value = time;
}
else {
value = valueObject.toString();
}
//设置单个单元格的字体颜色
// if(heardKey[j].equals("ddNum") || heardKey[j].equals("sjNum")){
// if((Long)map.get("ddNum")!=null){
// if((Long)map.get("sjNum")==null){
// cell.setCellStyle(cellParamStyle);
// } else if((Long) map.get("ddNum") != (Long) map.get("sjNum")){
// if ((Long) map.get("ddNum") > (Long) map.get("sjNum")) {
// cell.setCellStyle(cellParamStyle);
// }
// if ((Long) map.get("ddNum") < (Long) map.get("sjNum")) {
// cell.setCellStyle(cellParamStyle2);
// }
// }else {
// cell.setCellStyle(style);
// }
// }
// }
cell.setCellValue(Strings.isNullOrEmpty(value) ? "" : value);
}
a++;
}
SimpleDateFormat df = new SimpleDateFormat("yyyyMMddHHmmss");
String excelName = df.format(new Date());
File file = new File(request.getSession().getServletContext().getRealPath("/") + "/FileUpload/download/"+excelName+".xls");
String filePath ="/FileUpload/download/"+excelName+".xls";
if(!file.exists()){
//目标文件不存在,创建目标文件
file.getParentFile().mkdirs();
file.createNewFile();
}
FileOutputStream outputStream = new FileOutputStream(file);
wb.write(outputStream);
outputStream.close();
return filePath;
// //导出数据
// try {
// //设置Http响应头告诉浏览器下载这个附件
// System.out.println(System.currentTimeMillis()+"fuck.xml");
// response.setHeader("Content-Disposition", "attachment;Filename=" + System.currentTimeMillis() + ".xls");
// response.setContentType("application/octet-stream");
response.setContentType("application/vnd.ms-excel");
// OutputStream outputStream = response.getOutputStream();
// System.out.println(outputStream);
// wb.write(outputStream);
// outputStream.close();
// return wb.getBytes();
// } catch (Exception ex) {
// ex.printStackTrace();
// throw new IOException("导出Excel出现严重异常,异常信息:" + ex.getMessage());
// }
}
/**
* 检查数据配置问题
*
* @throws IOException 抛出数据异常类
*/
protected void checkConfig() throws IOException {
if (heardKey == null || heardList.size() == 0) {
throw new IOException("列名数组不能为空或者为NULL");
}
if (fontSize < 0 || rowHeight < 0 || columWidth < 0) {
throw new IOException("字体、宽度或者高度不能为负值");
}
if (Strings.isNullOrEmpty(sheetName)) {
throw new IOException("工作表表名不能为NULL");
}
}
public static void main(String[] args) {
String str = "Mon Dec 31 00:00:00 CST 2012";
Date date = parse(str, "EEE MMM dd HH:mm:ss zzz yyyy", Locale.US);
System.out.printf("%tF %<tT%n", date);
}
public static Date parse(String str, String pattern, Locale locale) {
if(str == null || pattern == null) {
return null;
}
try {
return new SimpleDateFormat(pattern, locale).parse(str);
} catch (ParseException e) {
e.printStackTrace();
}
return null;
}
public static String format(Date date, String pattern, Locale locale) {
if(date == null || pattern == null) {
return null;
}
return new SimpleDateFormat(pattern, locale).format(date);
}
}