package com.shove.web.util;
import java.io.BufferedInputStream;
import java.io.File;
import java.io.FileInputStream;
import java.io.FileNotFoundException;
import java.io.IOException;
import java.text.DecimalFormat;
import java.text.SimpleDateFormat;
import java.util.ArrayList;
import java.util.Arrays;
import java.util.Date;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
import org.apache.poi.hssf.usermodel.HSSFCell;
import org.apache.poi.hssf.usermodel.HSSFDateUtil;
import org.apache.poi.hssf.usermodel.HSSFRow;
import org.apache.poi.hssf.usermodel.HSSFSheet;
import org.apache.poi.hssf.usermodel.HSSFWorkbook;
import org.apache.poi.poifs.filesystem.POIFSFileSystem;
public class ExcelUtils {
public static void main(String[] args) throws Exception {
/*
* File file = new File("d:1234.xlsx");
*
* String[][] result = getData(file, 1);
*
* int rowLength = result.length;
*
* for(int i=0;i<rowLength;i++) {
*
* for(int j=0;j<result[i].length;j++) {
*
* System.out.print(result[i][j]+"\t\t"); }
*
* System.out.println(); }
*/
List<Map<String, Object>> list = new ArrayList<Map<String, Object>>();
for (int i = 0; i < 10; i++) {
Map<String, Object> map = new HashMap<String, Object>();
map.put("name1", "第一个——" + i);
map.put("name2", "第er个——" + i);
map.put("name3", "第san个——" + i);
list.add(map);
}
// exportExcel(list);
}
/**
*
* 读取Excel的内容，第一维数组存储的是一行中格列的值，二维数组存储的是多少个行
*
* @param file
* 读取数据的源Excel
*
* @param ignoreRows
* 读取数据忽略的行数，比喻行头不需要读入 忽略的行数为1
*
* @return 读出的Excel中数据的内容
*
* @throws FileNotFoundException
*
* @throws IOException
*
*/
public static String[][] getData(File file, int ignoreRows)
throws FileNotFoundException, IOException {
List<String[]> result = new ArrayList<String[]>();
int rowSize = 0;
BufferedInputStream in = new BufferedInputStream(new FileInputStream(file));
// 打开HSSFWorkbook
POIFSFileSystem fs = new POIFSFileSystem(in);
HSSFWorkbook wb = new HSSFWorkbook(fs);
HSSFCell cell = null;
for (int sheetIndex = 0; sheetIndex < wb.getNumberOfSheets(); sheetIndex++) {
HSSFSheet st = wb.getSheetAt(sheetIndex);
// 第一行为标题，不取
for (int rowIndex = ignoreRows; rowIndex <= st.getLastRowNum(); rowIndex++) {
HSSFRow row = st.getRow(rowIndex);
if (row == null) {
continue;
}
int tempRowSize = row.getLastCellNum() + 1;
if (tempRowSize > rowSize) {
rowSize = tempRowSize;
}
String[] values = new String[rowSize];
Arrays.fill(values, "");
boolean hasValue = false;
for (short columnIndex = 0; columnIndex <= row.getLastCellNum(); columnIndex++) {
String value = "";
cell = row.getCell(columnIndex);
if (cell != null) {
// 注意：一定要设成这个，否则可能会出现乱码
cell.setEncoding(HSSFCell.ENCODING_UTF_16);
switch (cell.getCellType()) {
case HSSFCell.CELL_TYPE_STRING:
value = cell.getStringCellValue();
break;
case HSSFCell.CELL_TYPE_NUMERIC:
if (HSSFDateUtil.isCellDateFormatted(cell)) {
Date date = cell.getDateCellValue();
if (date != null) {
value = new SimpleDateFormat("yyyy-MM-dd").format(date);
} else {
value = "";
}
} else {
if ("*年利率(%)".equals(st.getRow(1).getCell(columnIndex).getStringCellValue()))
value = cell.getNumericCellValue() + "";
else
value = new DecimalFormat("0").format(cell.getNumericCellValue());
}
break;
case HSSFCell.CELL_TYPE_FORMULA:
// 导入时如果为公式生成的数据则无值
if (!cell.getStringCellValue().equals("")) {
value = cell.getStringCellValue();
} else {
value = cell.getNumericCellValue() + "";
}
break;
case HSSFCell.CELL_TYPE_BLANK:
break;
case HSSFCell.CELL_TYPE_ERROR:
value = "";
break;
case HSSFCell.CELL_TYPE_BOOLEAN:
value = (cell.getBooleanCellValue() == true ? "Y" : "N");
break;
default:
value = "";
}
}
if (columnIndex == 0 && value.trim().equals("")) {
break;
}
values[columnIndex] = rightTrim(value);
values[columnIndex] = value.trim();
hasValue = true;
}
if (hasValue) {
result.add(values);
}
}
}
in.close();
String[][] returnArray = new String[result.size()][rowSize];
for (int i = 0; i < returnArray.length; i++) {
returnArray[i] = (String[]) result.get(i);
}
return returnArray;
}
/**
*
* 去掉字符串右边的空格
*
* @param str
* 要处理的字符串
*
* @return 处理后的字符串
*
*/
public static String rightTrim(String str) {
if (str == null) {
return "";
}
int length = str.length();
for (int i = length - 1; i >= 0; i--) {
if (str.charAt(i) != 0x20) {
break;
}
length--;
}
return str.substring(0, length);
}
public static HSSFWorkbook exportExcel(String sheetName, List<Map<String, Object>> list, String[] titles, String[] fieldNames) {
HSSFWorkbook wb = new HSSFWorkbook();
try {
HSSFSheet sheet = null;
String tb = "";
int k = 0;
// 对每个表生成一个新的sheet,并以表名命名
if (sheetName == null) {
sheetName = "sheet1";
}
sheet = wb.createSheet("sheet1");
// 设置表头的说明
HSSFRow topRow = sheet.createRow(0);
// 设置列宽
// sheet.setColumnWidth((short) 0, (short) 2000);
// sheet.setColumnWidth((short) 1, (short) 5000);
// sheet.setColumnWidth((short) 2, (short) 5000);
// sheet.setColumnWidth((short) 3, (short) 2000);
// sheet.setColumnWidth((short) 4, (short) 7000);
// sheet.setColumnWidth((short) 5, (short) 7000);
for (int i = 0; i < titles.length; i++) {
setCellGBKValue(topRow.createCell((short) i), titles[i]);
}
k = list.size();
for (Map<String, Object> map : list) {
HSSFRow row = sheet.createRow(k);
/*
* row.createCell((short) 0).setCellValue("值1");
* row.createCell((short) 1).setCellValue("值2");
* row.createCell((short) 2).setCellValue("值3");
*/
for (int i = 0; i < fieldNames.length; i++) {
setCellGBKValue(row.createCell((short) i), map.get(fieldNames[i]) + "");
}
k--;
}
// 把生成的EXCEL文件输出保存
// FileOutputStream fileOut = new
// FileOutputStream("c:vouchers.xls");
// wb.write(fileOut);
// fileOut.close();
// JOptionPane.showMessageDialog(null,"导出数据成功！");
} catch (Exception e) {
e.printStackTrace();
}
return wb;
}
private static void setCellGBKValue(HSSFCell cell, String value) {
cell.setCellType(HSSFCell.CELL_TYPE_STRING);
// 设置CELL的编码信息
cell.setEncoding(HSSFCell.ENCODING_UTF_16);
cell.setCellValue(value);
}
}