POI做导出Excel设置单元格中字体大小颜色，合并行列

public class ExcelTest {

/**

* @param args

*/

public static void main(String[] args) throws IOException {



try {

HSSFWorkbook wb = new HSSFWorkbook();

HSSFSheet sheet = wb.createSheet("new sheet");

HSSFCellStyle style = wb.createCellStyle(); // 样式对象



style.setVerticalAlignment(HSSFCellStyle.VERTICAL_CENTER);// 垂直

style.setAlignment(HSSFCellStyle.ALIGN_CENTER);// 水平

/**字体begin*/

style.setFillForegroundColor(HSSFColor.SKY_BLUE.index);

//背景颜色

// style.setFillPattern(HSSFCellStyle.SOLID_FOREGROUND);

// style.setBorderBottom(HSSFCellStyle.BORDER_THIN);

// style.setBorderLeft(HSSFCellStyle.BORDER_THIN);

// style.setBorderRight(HSSFCellStyle.BORDER_THIN);

// style.setBorderTop(HSSFCellStyle.BORDER_THIN);

// style.setAlignment(HSSFCellStyle.ALIGN_CENTER);



//生成一个字体

HSSFFont font=wb.createFont();

font.setColor(HSSFColor.BLACK.index);//HSSFColor.VIOLET.index //字体颜色

font.setFontHeightInPoints((short)12);

font.setBoldweight(HSSFFont.BOLDWEIGHT_BOLD); //字体增粗

//把字体应用到当前的样式

style.setFont(font);

/**字体end*/

HSSFRow row = sheet.createRow((short) 0);

HSSFRow row2 = sheet.createRow((short) 1);



// 四个参数分别是：起始行，起始列，结束行，结束列

sheet.addMergedRegion(new Region(0, (short) 0, 5, (short) 0));

HSSFCell ce = row.createCell((short) 0);

ce.setCellValue("项目\\日期"); // 表格的第一行第一列显示的数据

ce.setCellStyle(style); // 样式，居中

int num = 0;

for (int i = 0; i < 9; i++) { // 循环9次，每一次都要跨单元格显示

// 计算从那个单元格跨到那一格

int celln = 0;

int celle = 0;

if (i == 0) {

celln = 0;

celle = 1;

} else {

celln = (i * 2);

celle = (i * 2 + 1);

}

// 单元格合并

// 四个参数分别是：起始行，起始列，结束行，结束列

sheet.addMergedRegion(new Region(0, (short) (celln + 1), 0,

(short) (celle + 1)));

HSSFCell cell = row.createCell((short) (celln + 1));

cell.setCellValue("merging" + i); // 跨单元格显示的数据

cell.setCellStyle(style); // 样式

// 不跨单元格显示的数据，如：分两行，上一行分别两格为一格，下一行就为两格，“数量”，“金额”

HSSFCell cell1 = row2.createCell((short) celle);

HSSFCell cell2 = row2.createCell((short) (celle + 1));

cell1.setCellValue("数量");

cell1.setCellStyle(style);

cell2.setCellValue("金额");

cell2.setCellStyle(style);

num++;

}



// 在后面加上合计百分比



// 合计 在最后加上，还要跨一个单元格 //四个参数分别是：起始行，起始列，结束行，结束列

sheet.addMergedRegion(new Region(0, (short) (2 * num + 1), 0,

(short) (2 * num + 2)));

HSSFCell cell = row.createCell((short) (2 * num + 1));

cell.setCellValue("合计");

cell.setCellStyle(style);

HSSFCell cell1 = row2.createCell((short) (2 * num + 1));

HSSFCell cell2 = row2.createCell((short) (2 * num + 2));

cell1.setCellValue("数量");

cell1.setCellStyle(style);

cell2.setCellValue("金额");

cell2.setCellStyle(style);



// 百分比 同上

sheet.addMergedRegion(new Region(0, (short) (2 * num + 3), 0,

(short) (2 * num + 4)));

HSSFCell cellb = row.createCell((short) (2 * num + 3));

cellb.setCellValue("百分比");

cellb.setCellStyle(style);

HSSFCell cellb1 = row2.createCell((short) (2 * num + 3));

HSSFCell cellb2 = row2.createCell((short) (2 * num + 4));

cellb1.setCellValue("数量");

cellb1.setCellStyle(style);

cellb2.setCellValue("金额");

cellb2.setCellStyle(style);



//输出一些数据 然后再输出表头



FileOutputStream fileOut = new FileOutputStream("D://workbook.xls");

wb.write(fileOut);

fileOut.close();

System.out.print("OK");

} catch (Exception ex) {

ex.printStackTrace();

}



}







//设置单元格字体颜色

import java.io.File;

import java.io.FileNotFoundException;

import java.io.FileOutputStream;

import java.io.IOException;

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

import org.apache.poi.hssf.util.HSSFColor;

import org.apache.poi.ss.usermodel.Cell;

import org.apache.poi.ss.usermodel.CreationHelper;

import org.apache.poi.ss.usermodel.Font;

import org.apache.poi.ss.usermodel.RichTextString;

import org.apache.poi.ss.usermodel.Sheet;

import org.apache.poi.ss.usermodel.Workbook;

public class test {

public static void main(String[] args) {

Workbook workbook = new HSSFWorkbook();

Sheet sheet = workbook.createSheet();

Cell cell = sheet.createRow(0).createCell(0);

CreationHelper helper = workbook.getCreationHelper();

RichTextString str = helper.createRichTextString("a\nb\nc\nd\ne\n");// 在这里使用\n表示回车

Font[] fonts = new Font[5];

fonts[0] = workbook.createFont();

fonts[0].setColor(HSSFColor.YELLOW.index);

fonts[1] = workbook.createFont();

fonts[1].setColor(HSSFColor.RED.index);

fonts[2] = workbook.createFont();

fonts[2].setColor(HSSFColor.BLUE.index);

fonts[3] = workbook.createFont();

fonts[3].setColor(HSSFColor.ROSE.index);

fonts[4] = workbook.createFont();

fonts[4].setColor(HSSFColor.BLACK.index);

for (int i = 0; i < 5; i++) {

str.applyFont(i * 2, (i + 1) * 2, fonts[i]);

}

cell.setCellValue(str);

try {

FileOutputStream out = new FileOutputStream(new File("d:\\1.xls"));

workbook.write(out);

out.close();

} catch (FileNotFoundException e) {

e.printStackTrace();

} catch (IOException e) {

e.printStackTrace();

}

}

}