package com.cms.utils;
import java.beans.IntrospectionException;
import java.beans.PropertyDescriptor;
import java.io.InputStream;
import java.lang.reflect.InvocationTargetException;
import java.lang.reflect.Method;
import java.math.BigDecimal;
import java.text.DecimalFormat;
import java.text.NumberFormat;
import java.text.SimpleDateFormat;
import java.util.ArrayList;
import java.util.Date;
import java.util.List;
import java.util.Map;
import org.apache.poi.hssf.usermodel.HSSFWorkbook;
import org.apache.poi.ss.usermodel.Cell;
import org.apache.poi.ss.usermodel.Row;
import org.apache.poi.ss.usermodel.Sheet;
import org.apache.poi.ss.usermodel.Workbook;
import org.apache.poi.ss.util.CellRangeAddress;
import org.apache.poi.xssf.usermodel.*;
import com.cms.dto.ExcelBean;
public class ExcelUtil {
private final static String excel2003L = ".xls"; // 2003- 版本的excel
private final static String excel2007U = ".xlsx"; // 2007+ 版本的excel
/**
* Excel导入
*/
public static List<List<Object>> getBankListByExcel(InputStream in,
String fileName) throws Exception {
List<List<Object>> list = null;
// 创建Excel工作薄
Workbook work = getWorkbook(in, fileName);
if (null == work) {
throw new Exception("创建Excel工作薄为空!");
}
Sheet sheet = null;
Row row = null;
Cell cell = null;
list = new ArrayList<List<Object>>();
// 遍历Excel中所有的sheet
for (int i = 0; i < work.getNumberOfSheets(); i++) {
sheet = work.getSheetAt(i);
if (sheet == null) {
continue;
}
// 遍历当前sheet中的所有行
// +1跳过头部
for (int j = sheet.getFirstRowNum(); j <= sheet.getLastRowNum(); j++) {
boolean isAdd = true;
// 读取一行
row = sheet.getRow(j);
// 去掉空行和表头
if (row == null || row.getFirstCellNum() == j) {
continue;
}
// 遍历所有的列
List<Object> li = new ArrayList<Object>();
for (int y = row.getFirstCellNum(); y < row.getLastCellNum(); y++) {
cell = row.getCell(y);
if (cell != null
&& cell.getCellType() != Cell.CELL_TYPE_BLANK) {
li.add(getCellValue(cell));
} else if (y == 0) {// Excel中一行所有列中有空列则不加入
isAdd = false;
break;
}
}
if (isAdd)
list.add(li);
}
}
return list;
}
/**
* 描述:根据文件后缀,自适应上传文件的版本
*/
public static Workbook getWorkbook(InputStream inStr, String fileName)
throws Exception {
Workbook wb = null;
String fileType = fileName.substring(fileName.lastIndexOf("."));
if (excel2003L.equals(fileType)) {
wb = new HSSFWorkbook(inStr); // 2003-
} else if (excel2007U.equals(fileType)) {
wb = new XSSFWorkbook(inStr); // 2007+
} else {
throw new Exception("解析的文件格式有误!");
}
return wb;
}
/**
* 描述:对表格中数值进行格式化
*/
public static Object getCellValue(Cell cell) {
Object value = null;
DecimalFormat df = new DecimalFormat("0"); // 格式化字符类型的数字
SimpleDateFormat sdf = new SimpleDateFormat("yyy-MM-dd"); // 日期格式化
DecimalFormat df2 = new DecimalFormat("0.00"); // 格式化数字
switch (cell.getCellType()) {
case Cell.CELL_TYPE_STRING:
value = cell.getRichStringCellValue().getString();
break;
case Cell.CELL_TYPE_NUMERIC:
if ("General".equals(cell.getCellStyle().getDataFormatString())) {
value = df.format(cell.getNumericCellValue());
} else if ("m/d/yy".equals(cell.getCellStyle()
.getDataFormatString())) {
value = sdf.format(cell.getDateCellValue());
} else {
value = df2.format(cell.getNumericCellValue());
}
break;
case Cell.CELL_TYPE_BOOLEAN:
value = cell.getBooleanCellValue();
break;
case Cell.CELL_TYPE_BLANK:
value = "";
break;
default:
break;
}
return value;
}
/**
* 导出
*/
public static XSSFWorkbook createExcelFile(Class clazz, List objs,
Map<Integer, List<ExcelBean>> map, String sheetName)
throws IllegalArgumentException, IllegalAccessException,
InvocationTargetException, ClassNotFoundException,
IntrospectionException {
// 创建新的Excel工作簿
XSSFWorkbook workbook = new XSSFWorkbook();
// 在Excel工作簿中建一工作表,其名为缺省值, 也可以指定Sheet名称
XSSFSheet sheet = workbook.createSheet(sheetName);
// 以下为excel的字体样式以及excel的标题与内容的创建,下面会具体分析;
createFont(workbook); // 字体样式
createTableHeader(sheet, map); // 创建标题(头)
createTableRows(sheet, map, objs, clazz); // 创建内容
return workbook;
}
private static XSSFCellStyle fontStyle;
private static XSSFCellStyle fontStyle2;
public static void createFont(XSSFWorkbook workbook) {
// 表头
fontStyle = workbook.createCellStyle();
XSSFFont font1 = workbook.createFont();
font1.setFontName("黑体");
font1.setFontHeightInPoints((short) 14);// 设置字体大小
fontStyle.setFont(font1);
// 内容
fontStyle2 = workbook.createCellStyle();
XSSFFont font2 = workbook.createFont();
font2.setFontName("宋体");
font2.setFontHeightInPoints((short) 10);// 设置字体大小
fontStyle2.setFont(font2);
}
/**
* 根据ExcelMapping 生成列头(多行列头)
*
* @param sheet
* 工作簿
* @param map
* 每行每个单元格对应的列头信息
*/
public static final void createTableHeader(XSSFSheet sheet,
Map<Integer, List<ExcelBean>> map) {
int startIndex = 0;// cell起始位置
int endIndex = 0;// cell终止位置
for (Map.Entry<Integer, List<ExcelBean>> entry : map.entrySet()) {
XSSFRow row = sheet.createRow(entry.getKey());
List<ExcelBean> excels = entry.getValue();
for (int x = 0; x < excels.size(); x++) {
// 合并单元格
if (excels.get(x).getCols() > 1) {
if (x == 0) {
endIndex += excels.get(x).getCols() - 1;
CellRangeAddress range = new CellRangeAddress(0, 0,
startIndex, endIndex);
sheet.addMergedRegion(range);
startIndex += excels.get(x).getCols();
} else {
endIndex += excels.get(x).getCols();
CellRangeAddress range = new CellRangeAddress(0, 0,
startIndex, endIndex);
sheet.addMergedRegion(range);
startIndex += excels.get(x).getCols();
}
XSSFCell cell = row.createCell(startIndex
- excels.get(x).getCols());
cell.setCellValue(excels.get(x).getHeadTextName());// 设置内容
if (excels.get(x).getCellStyle() != null) {
cell.setCellStyle(excels.get(x).getCellStyle());// 设置格式
}
cell.setCellStyle(fontStyle);
} else {
XSSFCell cell = row.createCell(x);
cell.setCellValue(excels.get(x).getHeadTextName());// 设置内容
if (excels.get(x).getCellStyle() != null) {
cell.setCellStyle(excels.get(x).getCellStyle());// 设置格式
}
cell.setCellStyle(fontStyle);
}
}
}
}
public static void createTableRows(XSSFSheet sheet,
Map<Integer, List<ExcelBean>> map, List objs, Class clazz)
throws IllegalArgumentException, IllegalAccessException,
InvocationTargetException, IntrospectionException,
ClassNotFoundException {
int rowindex = map.size();
int maxKey = 0;
List<ExcelBean> ems = new ArrayList<ExcelBean>();
for (Map.Entry<Integer, List<ExcelBean>> entry : map.entrySet()) {
if (entry.getKey() > maxKey) {
maxKey = entry.getKey();
}
}
ems = map.get(maxKey);
List<Integer> widths = new ArrayList<Integer>(ems.size());
for (Object obj : objs) {
XSSFRow row = sheet.createRow(rowindex);
for (int i = 0; i < ems.size(); i++) {
ExcelBean em = (ExcelBean) ems.get(i);
// 获得get方法
PropertyDescriptor pd = new PropertyDescriptor(
em.getPropertyName(), clazz);
Method getMethod = pd.getReadMethod();
Object rtn = getMethod.invoke(obj);
String value = "";
if (rtn != null) {
if (rtn instanceof Date) {
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