我有一个简单的程序,它使用apache.poi外部库来操作excel文件。我在windows环境中使用eclipse,现在我必须在linux上用终端编译和运行我的程序。我搜索了如何包含我需要的罐子,但最终出现了以下错误:
错误:无法找到或加载主类xlstocsv。
我遵循的步骤如下:
javac-cp./jars/poi-3.13-20150929.jar:./jars/poi-ooxml-schemas-3.13-20150929.jar:./jars/poi-ooxml-3.13-20150929.jar:./jars/xmlbeans-2.6.0.jar xlstocsv.java
java-cp./jars/poi-3.13-20150929.jar:./jars/poi-ooxml-schemas-3.13-20150929.jar:./jars/poi-ooxml-3.13-20150929.jar:./jars/xmlbeans-2.6.0.jar xlstocsv
我当前的目录是/home/demo/desktop/xls_to_csv,其中是xlstocsv.java文件。jar文件位于/home/demo/desktop/xls_to_csv/jars中。
有人能告诉我并解释正确的语法吗?可以调用包含所有jar文件的文件夹而不是单独调用它们吗?
提前谢谢。
编辑,我的代码:

    import java.io.File;
    import java.io.FileInputStream;
    import java.io.FileOutputStream;
    import java.util.Iterator;
    import org.apache.poi.hssf.usermodel.HSSFFormulaEvaluator;
    import org.apache.poi.hssf.usermodel.HSSFWorkbook;
    import org.apache.poi.ss.usermodel.Cell;
    import org.apache.poi.ss.usermodel.DataFormatter;
    import org.apache.poi.ss.usermodel.FormulaEvaluator;
    import org.apache.poi.ss.usermodel.Row;
    import org.apache.poi.ss.usermodel.Sheet;

public class xlsToCsv {

    static void convert(File input, File output) throws Exception {

        StringBuffer data = new StringBuffer();

        FileOutputStream fos = new FileOutputStream(output);
        HSSFWorkbook file = new HSSFWorkbook(new FileInputStream(input));
        DataFormatter objDefaultFormat = new DataFormatter();
        FormulaEvaluator objFormulaEvaluator = new HSSFFormulaEvaluator((HSSFWorkbook) file);

        Sheet sheet;
        Row row;
        Cell cell;

        String sheetName, cellValue;
        int cellType, rowIndex = 0, columnIndex = 0;
        boolean blankRow = true, blankArea = true;


        Iterator<Sheet> sheetIt;
        Iterator<Row> rowIt;
        Iterator<Cell> cellIt;

        sheetIt = file.iterator();
        while(sheetIt.hasNext()) {
            sheet = sheetIt.next();
            sheetName = sheet.getSheetName();

            rowIt = sheet.iterator();
            while(rowIt.hasNext()) {
                row = rowIt.next();

                cellIt = row.iterator();
                while (cellIt.hasNext()) {
                    cell = cellIt.next();
                    cellType = cell.getCellType();

                    if(!isBlankCell(cellType) || !blankArea) {
                        if(rowIndex == 0 && columnIndex == 0)
                            data.append(sheetName + " - Header" + ";");
                        else if(rowIndex > 0 && columnIndex == 0)
                            data.append(sheetName + ";");

                        objFormulaEvaluator.evaluateInCell(cell);
                        cellValue = objDefaultFormat.formatCellValue(cell,objFormulaEvaluator);

                        if(cellValue.isEmpty())
                            data.append(";");
                        else
                            data.append(cellValue + ";");

                        columnIndex++;
                        blankRow = false;
                        blankArea = false;
                    }
                }

                if(!blankRow) {
                    data.append('\n');
                    rowIndex++;
                }

                blankRow = true;
                columnIndex = 0;
            }
            //new sheet => reset control fields
            rowIndex = 0;
            columnIndex = 0;
            blankRow = true;
            blankArea = true;
        }

        fos.write(data.toString().getBytes());
        fos.close();
    }

    private static boolean isBlankCell(int cellType) {
        return cellType == Cell.CELL_TYPE_BLANK
                || cellType == Cell.CELL_TYPE_ERROR
                || cellType == Cell.CELL_TYPE_FORMULA;
    }

    public static void main(String[] args) {

        if(args.length < 2 || args.length > 2) {
            System.err.println("Insert input and output path");
            System.exit(0);
        }

        File input = new File(args[0]);
        File output = new File(args[1]);

        try {
            convert(input, output);
            System.out.println("File " + output.getName() + "created sucessfully");

        } catch(Exception e) {
            e.printStackTrace();
        }
    }
}

最佳答案

如果要在包含运行/编译Java文件所需的所有JAR的同时添加目录,可以使用以下命令:
在Windows中:
java-classpath“;c:\ lib*”主类
在Unix/Linux中
java-classpath“./lib/*”主类
注意:在windows中,分号是分隔符,而在unix/linux中,分号是多个jar目录的分隔符。
;(点)表示当前目录

关于java - 编译并运行带有多个外部jar文件的Java程序,我们在Stack Overflow上找到一个类似的问题:https://stackoverflow.com/questions/35314602/

10-09 07:42