java实现excel导出合并单元格的步骤详解

// 创建工作簿
Workbook workbook = new HSSFWorkbook();
// 创建工作表
Sheet sheet = workbook.createSheet("Sheet1");

// 创建表头行
Row headerRow = sheet.createRow(0);
// 创建表头单元格
Cell headerCell1 = headerRow.createCell(0);
headerCell1.setCellValue("姓名");
Cell headerCell2 = headerRow.createCell(1);
headerCell2.setCellValue("年龄");

// 填充数据
List<User> userList = getUserList();
for (int i = 0; i < userList.size(); i++) {
    User user = userList.get(i);
    Row dataRow = sheet.createRow(i + 1);
    Cell dataCell1 = dataRow.createCell(0);
    dataCell1.setCellValue(user.getName());
    Cell dataCell2 = dataRow.createCell(1);
    dataCell2.setCellValue(user.getAge());
}

// 合并单元格
CellRangeAddress region = new CellRangeAddress(0, 0, 0, 1);
sheet.addMergedRegion(region);

// 导出Excel文件
File file = new File("user.xls");
FileOutputStream fos = new FileOutputStream(file);
workbook.write(fos);
fos.close();

public static void exportExcel() throws Exception {
    // 创建工作簿
    Workbook workbook = new HSSFWorkbook();
    // 创建工作表
    Sheet sheet = workbook.createSheet("Sheet1");

    // 创建表头行
    Row headerRow = sheet.createRow(0);
    // 创建表头单元格
    Cell headerCell1 = headerRow.createCell(0);
    headerCell1.setCellValue("姓名");
    Cell headerCell2 = headerRow.createCell(1);
    headerCell2.setCellValue("年龄");

    // 填充数据
    List<User> userList = getUserList();
    for (int i = 0; i < userList.size(); i++) {
        User user = userList.get(i);
        Row dataRow = sheet.createRow(i + 1);
        Cell dataCell1 = dataRow.createCell(0);
        dataCell1.setCellValue(user.getName());
        Cell dataCell2 = dataRow.createCell(1);
        dataCell2.setCellValue(user.getAge());
    }

    // 合并单元格
    CellRangeAddress region = new CellRangeAddress(0, 0, 0, 1);
    sheet.addMergedRegion(region);

    // 导出Excel文件
    File file = new File("user.xls");
    FileOutputStream fos = new FileOutputStream(file);
    workbook.write(fos);
    fos.close();
}

public static List<User> getUserList() {
    List<User> userList = new ArrayList<>();
    userList.add(new User("张三", 20));
    userList.add(new User("李四", 25));
    userList.add(new User("王五", 30));
    return userList;
}

public static class User {
    private String name;
    private int age;

    public User(String name, int age) {
        this.name = name;
        this.age = age;
    }

    public String getName() {
        return name;
    }

    public void setName(String name) {
        this.name = name;
    }

    public int getAge() {
        return age;
    }

    public void setAge(int age) {
        this.age = age;
    }
}