package com.shove.util;
import java.io.BufferedInputStream;
import java.io.File;
import java.io.FileInputStream;
import java.io.FileNotFoundException;
import java.io.FileOutputStream;
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 javax.swing.JOptionPane;
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++) {
}
}*/
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 {
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(List<Map<String,Object>> list) {
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
sheet = wb.createSheet("sheet名");
//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);
setCellGBKValue(topRow.createCell((short) 0),"序号");
setCellGBKValue(topRow.createCell((short) 1),"礼券编号");
setCellGBKValue(topRow.createCell((short) 2),"礼券序列号");
setCellGBKValue(topRow.createCell((short) 3),"金额");
setCellGBKValue(topRow.createCell((short)4),"礼券添加时间");
setCellGBKValue(topRow.createCell((short) 5),"礼券到期时间");
k = 1;
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");*/
setCellGBKValue(row.createCell((short) 0),map.get("id").toString());
setCellGBKValue(row.createCell((short) 1),map.get("number").toString());
setCellGBKValue(row.createCell((short) 2),map.get("code").toString());
setCellGBKValue(row.createCell((short) 3),map.get("money").toString());
setCellGBKValue(row.createCell((short) 4),map.get("addDate").toString());
setCellGBKValue(row.createCell((short) 5),map.get("effectiveDate").toString());
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);
}
}