使用java 实现先对excel排序，合并每行文字相同的列，不用考虑跨列合并,给出示例代码

好的，我明白了。以下是一个示例代码，用Java对Excel进行排序并合并每行具有相同值的列。

import java.io.FileInputStream;
import java.io.FileOutputStream;
import java.io.IOException;
import java.util.ArrayList;
import java.util.Collections;
import java.util.HashMap;
import java.util.Iterator;
import java.util.Map;
import org.apache.poi.ss.usermodel.Cell;
import org.apache.poi.ss.usermodel.Row;
import org.apache.poi.ss.usermodel.Sheet;
import org.apache.poi.ss.usermodel.Workbook;
import org.apache.poi.ss.usermodel.WorkbookFactory;

public class ExcelSortAndMerge {
    public static void main(String[] args) {
        try {
            // Excel文件路径
            String excelFilePath = "path/to/excelFile.xlsx";

            // 读取Excel文件
            FileInputStream inputStream = new FileInputStream(excelFilePath);
            Workbook workbook = WorkbookFactory.create(inputStream);
            Sheet sheet = workbook.getSheetAt(0);

            // 获取每一列的标题
            Row headerRow = sheet.getRow(0);
            int columnCount = headerRow.getLastCellNum();
            ArrayList<String> headers = new ArrayList<>();
            for (int i = 0; i < columnCount; i++) {
                Cell headerCell = headerRow.getCell(i);
                String header = headerCell.getStringCellValue().trim();
                headers.add(header);
            }

            // 获取每一行的数据
            ArrayList<HashMap<String, String>> rows = new ArrayList<>();
            Iterator<Row> rowIterator = sheet.iterator();
            rowIterator.next();
            while (rowIterator.hasNext()) {
                Row row = rowIterator.next();

                HashMap<String, String> values = new HashMap<>();
                for (int i = 0; i < columnCount; i++) {
                    Cell cell = row.getCell(i);
                    String value = "";
                    if (cell != null) {
                        value = cell.getStringCellValue().trim();
                    }
                    values.put(headers.get(i), value);
                }
                rows.add(values);
            }

            // 按特定的列进行排序
            Collections.sort(rows, (a, b) -> a.get("columnName").compareTo(b.get("columnName")));

            // 合并列中相同值的行
            for (int i = 0; i < rows.size() - 1; i++) {
                Map.Entry<String, String> currentEntry = new ArrayList<>(rows.get(i).entrySet()).get(0);
                Map.Entry<String, String> nextEntry = new ArrayList<>(rows.get(i + 1).entrySet()).get(0);

                if (currentEntry.getValue().equals(nextEntry.getValue())) {
                    for (int j = 0; j < columnCount; j++) {
                        String currentValue = rows.get(i).get(headers.get(j));
                        String nextValue = rows.get(i + 1).get(headers.get(j));
                        if (!currentValue.equals(nextValue)) {
                            rows.get(i).put(headers.get(j), currentValue + "\n" + nextValue);
                        }
                    }
                    rows.remove(i + 1);
                    i--;
                }
            }

            // 写入合并后的数据到Excel
            for (int i = 0; i < rows.size(); i++) {
                Row row = sheet.createRow(i + 1);
                for (int j = 0; j < columnCount; j++) {
                    Cell cell = row.createCell(j);
                    cell.setCellValue(rows.get(i).get(headers.get(j)));
                }
            }

            // 输出Excel文件
            FileOutputStream outputStream = new FileOutputStream(excelFilePath);
            workbook.write(outputStream);
            workbook.close();
        } catch (IOException e) {
            e.printStackTrace();
        }
    }
}

请注意，您需要更改示例代码中的 `excelFilePath` 变量，使其指向您自己的Excel文件路径。此代码将按 `"columnName"` 列对行进行排序，并将具有相同值的列合并为一行。您需要替换此列名称（行10）为您需要按其排序的实际列名称。