【发布时间】:2015-09-17 18:23:02
【问题描述】:
我是 Java 和 Apache POI 的新手,但我得到了这个任务,我必须从命令行读取 Excel 文件的名称以及需要修改的列的名称和值。
所以最终应用程序将像这样运行: java test -f test.xls -i B2=10;B3=20;B4=30
我创建了一个包含单元格名称及其值的地图,但我不知道如何使用此地图按名称访问单元格(例如:B2)并设置新值(例如。 : 10)。
到目前为止,我的代码如下:
package test;
import java.io.File;
import java.io.FileInputStream;
import java.io.FileNotFoundException;
import java.io.IOException;
import java.util.HashMap;
import java.util.Iterator;
import java.util.Map;
import java.util.Map.Entry;
import org.apache.poi.hssf.usermodel.HSSFCell;
import org.apache.poi.hssf.usermodel.HSSFFormulaEvaluator;
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.hssf.util.CellReference;
import org.apache.poi.ss.usermodel.*;
public class ReadExcel {
public static void main(String[] args) throws FileNotFoundException, IOException {
// Will contain cell name / value pair for input cells and output cells
Map<String, String> inputCellsMap = new HashMap<String, String>();
Map<String, String> outputCellsMap = new HashMap<String, String>();
// Open the Excel file
FileInputStream file = new FileInputStream(new File(args[1]));
// Get the current workbook
HSSFWorkbook workbook = new HSSFWorkbook(file);
// Get the first sheet of the workbook
HSSFSheet sheet = workbook.getSheetAt(0);
// Get the input cells that need to be modified and
// store their name and value in the inputCellsMap
for (String element : args[3].split(";")) {
inputCellsMap.put(element.split("=")[0], element.split("=")[1]);
}
// Loop through the cells that need to be modified and
// set the new value in the Excel document
Iterator<Entry<String,String>> iterator = inputCellsMap.entrySet().iterator();
while (iterator.hasNext()) {
Map.Entry<String,String> entry = (Map.Entry<String,String>) iterator.next();
// TODO
// Get cells by name and set their new value
//System.out.println("Key : " + entry.getKey() + " Value :" + entry.getValue());
}
workbook.close();
}
}
【问题讨论】:
-
我想到的第一个想法是将 Map 值设置为 Cell 而不是 String。
标签: java excel apache-poi