求问大神怎么能把<em>java</em>程序加到excel里面-java excel处理,ja

例如统计ABC三列中对号的个数
=COUNTIF(A:C,"√")
具体的你可以根据自己表格需要更改区域，和所统计符号，最好用A1：C100这种表示方式，我用的那种会减慢电脑速度

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.List;

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 ReadExcel2 {

/**
* @param args
* @throws IOException
* @throws FileNotFoundException
*/
public static void main(String[] args) throws FileNotFoundException, IOException {
7a686964616fe4b893e5b19e335File file = new File("src/test.xls");

String[][] data = getData(file, 0);
printStringArray(data);

}

public static void printStringArray(String[][] data){
for(int i =0; i< data.length; i++){
for(int j=0; j< data[i].length; j++){
System.out.print(data[i][j]+"\t");
}
System.out.print("\n");
}
}

/**
*
* 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);
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);

}

}

类似知这道样内：容
package com.li.controller;
import java.io.File;
import java.io.FileInputStream;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.OutputStream;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;
import java.util.Map;

import org.apache.poi.hssf.usermodel.HSSFWorkbook;