POI格式化Cell样式

通过一个实例演示怎样通过POI设置Excel单元格的边框、字体、颜色、大小、下划线、合并、对齐方式。

Excel文件如下：

Java代码  

package my.excel;   

  

import java.io.FileOutputStream;   

  

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

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

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

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.util.CellRangeAddress;   

import org.apache.poi.xssf.usermodel.XSSFCellStyle;   

import org.apache.poi.xssf.usermodel.XSSFColor;   

import org.apache.poi.xssf.usermodel.XSSFWorkbook;   

  

 

public class CellFormatExcel {   

       

    public static void main(String[] args) {   

        try {   

            // 创建Excel表格工作簿   

            Workbook wb = new XSSFWorkbook();   

            Sheet sheet = wb.createSheet("表格单元格格式化");   

               

            //============================   

            //       设置单元格的字体   

            //============================   

            Row ztRow = sheet.createRow((short)0);   

            Cell ztCell = ztRow.createCell(0);   

            ztCell.setCellValue("中国");   

            // 创建单元格样式对象   

            XSSFCellStyle ztStyle = (XSSFCellStyle) wb.createCellStyle();   

            // 创建字体对象   

            Font ztFont = wb.createFont();   

            ztFont.setItalic(true);                     // 设置字体为斜体字   

            ztFont.setColor(Font.COLOR_RED);            // 将字体设置为“红色”   

            ztFont.setFontHeightInPoints((short)22);    // 将字体大小设置为18px   

            ztFont.setFontName("华文行楷");             // 将“华文行楷”字体应用到当前单元格上   

            ztFont.setUnderline(Font.U_DOUBLE);         // 添加（Font.U_SINGLE单条下划线/Font.U_DOUBLE双条下划线）   

//          ztFont.setStrikeout(true);                  // 是否添加删除线   

            ztStyle.setFont(ztFont);                    // 将字体应用到样式上面   

            ztCell.setCellStyle(ztStyle);               // 样式应用到该单元格上   

               

            //============================   

            //        设置单元格边框   

            //============================   

            Row borderRow = sheet.createRow(2);   

            Cell borderCell = borderRow.createCell(1);   

            borderCell.setCellValue("中国");   

            // 创建单元格样式对象   

            XSSFCellStyle borderStyle = (XSSFCellStyle)wb.createCellStyle();   

            // 设置单元格边框样式   

            // CellStyle.BORDER_DOUBLE      双边线   

            // CellStyle.BORDER_THIN        细边线   

            // CellStyle.BORDER_MEDIUM      中等边线   

            // CellStyle.BORDER_DASHED      虚线边线   

            // CellStyle.BORDER_HAIR        小圆点虚线边线   

            // CellStyle.BORDER_THICK       粗边线   

            borderStyle.setBorderBottom(CellStyle.BORDER_THICK);   

            borderStyle.setBorderTop(CellStyle.BORDER_DASHED);   

            borderStyle.setBorderLeft(CellStyle.BORDER_DOUBLE);   

            borderStyle.setBorderRight(CellStyle.BORDER_THIN);   

               

            // 设置单元格边框颜色   

            borderStyle.setBottomBorderColor(new XSSFColor(java.awt.Color.RED));   

            borderStyle.setTopBorderColor(new XSSFColor(java.awt.Color.GREEN));   

            borderStyle.setLeftBorderColor(new XSSFColor(java.awt.Color.BLUE));   

               

            borderCell.setCellStyle(borderStyle);   

               

            //============================   

            //      设置单元内容的对齐方式   

            //============================   

            Row alignRow = sheet.createRow(4);   

            Cell alignCell = alignRow.createCell(1);   

            alignCell.setCellValue("中国");   

               

            // 创建单元格样式对象   

            XSSFCellStyle alignStyle = (XSSFCellStyle)wb.createCellStyle();   

               

            // 设置单元格内容水平对其方式   

            // XSSFCellStyle.ALIGN_CENTER       居中对齐   

            // XSSFCellStyle.ALIGN_LEFT         左对齐   

            // XSSFCellStyle.ALIGN_RIGHT        右对齐   

            alignStyle.setAlignment(XSSFCellStyle.ALIGN_CENTER);   

               

            // 设置单元格内容垂直对其方式   

            // XSSFCellStyle.VERTICAL_TOP       上对齐   

            // XSSFCellStyle.VERTICAL_CENTER    中对齐   

            // XSSFCellStyle.VERTICAL_BOTTOM    下对齐   

            alignStyle.setVerticalAlignment(XSSFCellStyle.VERTICAL_CENTER);   

               

            alignCell.setCellStyle(alignStyle);   

               

            //============================   

            //      设置单元格的高度和宽度   

            //============================   

            Row sizeRow = sheet.createRow(6);   

            sizeRow.setHeightInPoints(30);                  // 设置行的高度   

               

            Cell sizeCell = sizeRow.createCell(1);     

            String sizeCellValue = "《Java编程思想》";            // 字符串的长度为10，表示该字符串中有10个字符，忽略中英文   

            sizeCell.setCellValue(sizeCellValue);       

            // 设置单元格的长度为sizeCellVlue的长度。而sheet.setColumnWidth使用sizeCellVlue的字节数   

            // sizeCellValue.getBytes().length == 16   

            sheet.setColumnWidth(1, (sizeCellValue.getBytes().length) * 256 );   

               

            //============================   

            //      设置单元格自动换行   

            //============================   

            Row wrapRow = sheet.createRow(8);   

            Cell wrapCell = wrapRow.createCell(2);   

            wrapCell.setCellValue("宝剑锋从磨砺出,梅花香自苦寒来");   

               

            // 创建单元格样式对象   

            XSSFCellStyle wrapStyle = (XSSFCellStyle)wb.createCellStyle();   

            wrapStyle.setWrapText(true);                    // 设置单元格内容是否自动换行   

            wrapCell.setCellStyle(wrapStyle);   

               

            //============================   

            //         合并单元格列   

            //============================   

            Row regionRow = sheet.createRow(12);   

            Cell regionCell = regionRow.createCell(0);   

            regionCell.setCellValue("宝剑锋从磨砺出,梅花香自苦寒来");   

               

            // 合并第十三行中的A、B、C三列   

            CellRangeAddress region = new CellRangeAddress(12, 12, 0, 2); // 参数都是从O开始   

            sheet.addMergedRegion(region);   

               

            //============================   

            //         合并单元格行和列   

            //============================   

            Row regionRow2 = sheet.createRow(13);   

            Cell regionCell2 = regionRow2.createCell(3);   

            String region2Value = "宝剑锋从磨砺出,梅花香自苦寒来。"  

                                + "采得百花成蜜后,为谁辛苦为谁甜。"  

                                + "操千曲而后晓声,观千剑而后识器。"  

                                + "察己则可以知人,察今则可以知古。";   

            regionCell2.setCellValue(region2Value);   

               

            // 合并第十三行中的A、B、C三列   

            CellRangeAddress region2 = new CellRangeAddress(13, 17, 3, 7); // 参数都是从O开始   

            sheet.addMergedRegion(region2);   

               

            XSSFCellStyle region2Style = (XSSFCellStyle)wb.createCellStyle();   

            region2Style.setVerticalAlignment(CellStyle.VERTICAL_CENTER);   

            region2Style.setWrapText(true);                     // 设置单元格内容是否自动换行   

            regionCell2.setCellStyle(region2Style);   

                           

            //============================   

            // 将Excel文件写入到磁盘上   

            //============================   

            FileOutputStream is = new FileOutputStream("document/CellFormatExcel.xlsx");   

            wb.write(is);   

            is.close();   

               

            System.out.println("写入成功，运行结束！");   

        } catch(Exception e) {   

            e.printStackTrace();   

        }   

    }   

}