Java Excel POI

1、使用

            String toFileName = "E:\\sheet1.xlsx";
            String fromFileName = "E:\\sheet2.xlsx";

            MemoryToExcel memoryToExcel = new MemoryToExcel();
            memoryToExcel.mergeExcel(toFileName, , fromFileName, );

            // String fileName = "E:\\test.xlsx";
            // String sheetName = "Test";
            //
            // Map<Integer, FrameworkEnums.EnumDBDataType> dataTypeByColumn =
            // new HashMap<Integer, EnumDBDataType>();
            // dataTypeByColumn.put(1, EnumDBDataType.Int);
            // dataTypeByColumn.put(2, EnumDBDataType.Int);
            // dataTypeByColumn.put(3, EnumDBDataType.Date);
            // dataTypeByColumn.put(4, EnumDBDataType.DateTime);
            //
            // Map<Integer, String> dataFormatByColumn = new HashMap<Integer,
            // String>();
            // //dataFormatByColumn.put(2, "0.00%");
            // dataFormatByColumn.put(3, "yyyy-mm-dd");
            // dataFormatByColumn.put(4, "yyyy-mm-dd hh:mm:ss");
            //
            // Object[][] data = new Object[100][10];
            //
            // for (int i = 0; i < 100; i++) {
            // for (int j = 0; j < 10; j++) {
            // if (j == 1) {
            // data[i][j] = i;
            // } else if (j == 2) {
            // data[i][j] = i + 0.6;
            // } else if (j == 3) {
            // data[i][j] = new Date();
            // } else if (j == 4) {
            // data[i][j] = new Date();
            // } else {
            // data[i][j] = "" + i + "+" + j;
            // }
            // }
            // }
            //
            // MemoryToExcel memoryToExcel = new MemoryToExcel();
            // memoryToExcel.setFileName(fileName);
            // memoryToExcel.setSheetName(sheetName);
            // memoryToExcel.setTopSkipRows(2);
            // memoryToExcel.setSourceData(data);
            // memoryToExcel.setDataTypeByColumn(dataTypeByColumn);
            // memoryToExcel.setDataFormatByColumn(dataFormatByColumn);
            // memoryToExcel.start();
            // System.out.println("写数据结束！");
            //
            // memoryToExcel.setWrapCellData(0, 0, 0, "报表测试");
            // for (int i = 0; i < 10; i++) {
            // memoryToExcel.setWrapCellData(0, 1, i, "累计\r\n外呼量" + i);
            // }
            // System.out.println("设置标题和列名结束！");

            // memoryToExcel.setColumnWidth(0, 0, 9, 10);
            // memoryToExcel.setRowHeight(0, 1, 2, (short)15);

            // memoryToExcel.setAutoFit(0, 0, 2);
            // System.out.println("设置自适应结束！");

            // Color color = new Color(54, 201, 201);
            // memoryToExcel.setBackgroundColor(0, 1, 1, 0, 10, color);
            // System.out.println("设置背景色结束！");
            //
            // memoryToExcel.setMerge(0, 0, 0, 0, 9);
            // System.out.println("设置单元格合并结束！");
            //
            // Font font = new Font("宋体", Font.BOLD, 12);
            // color = new Color(255, 0, 0);
            // memoryToExcel.setFont(0, 0, 1, 0, 1, font, color);
            // font = new Font("宋体", Font.BOLD, 10);
            // memoryToExcel.setFont(0, 1, 1, 0, 10, font);
            // font = new Font("宋体", Font.PLAIN, 9);
            // memoryToExcel.setFont(0, 2, 100, 0, 10, font);
            // System.out.println("设置字体结束！");
            //
            // memoryToExcel.setBorder(0, 0, 100 + 2, 0, 10);
            // System.out.println("设置Border结束！");
            //
            // memoryToExcel.setAlignment(0, 0, 100 + 2, 0, 10,
            // (short) 2, (short) 1);
            // System.out.println("设置对齐方式结束！");
            //

            System.out.println("导出成功");
        } catch (Exception e) {
            System.out.println(String.format("导出失败，%s", e.getMessage()));
        }

        System.exit();

2、核心代码

package nankang.test;

import java.io.FileInputStream;
import java.io.FileOutputStream;
import java.io.InputStream;
import java.io.OutputStream;
import java.text.SimpleDateFormat;
import java.util.Date;
import java.util.HashMap;
import java.util.Map;

import org.apache.poi.ss.usermodel.Cell;
import org.apache.poi.ss.usermodel.CellStyle;
import org.apache.poi.ss.usermodel.DataFormat;
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.streaming.SXSSFWorkbook;
import org.apache.poi.xssf.usermodel.XSSFCellStyle;
import org.apache.poi.xssf.usermodel.XSSFColor;
import org.apache.poi.xssf.usermodel.XSSFFont;
import org.apache.poi.xssf.usermodel.XSSFWorkbook;

public class MemoryToExcel {

    private String m_FileName;
    private String m_SheetName;
    private int m_TopSkipRows = 0;
    private int m_TopSkipCols = 0;
    private int m_DataType2SartRow = 0;
    private Map<Integer, FrameworkEnums.EnumDBDataType> m_DataTypeByColumn = new HashMap<Integer, FrameworkEnums.EnumDBDataType>();
    private Map<Integer, String> m_DataFormatByColumn = new HashMap<Integer, String>();
    private Map<Integer, FrameworkEnums.EnumDBDataType> m_DataTypeByColumn2 = new HashMap<Integer, FrameworkEnums.EnumDBDataType>();
    private Map<Integer, String> m_DataFormatByColumn2 = new HashMap<Integer, String>();
    private Object[][] m_SourceData;

    /**
     * 返回 文件名称
     *
     * @return 文件名称
     */
    public String getFileName() {
        return m_FileName;
    }

    /**
     * 设置文件名
     *
     * @param fileName
     *            文件名称
     */
    public void setFileName(String fileName) {
        m_FileName = fileName;
    }

    public String getSheetName() {
        return m_SheetName;
    }

    public void setSheetName(String sheetName) {
        m_SheetName = sheetName;
    }

    public int getTopSkipRows() {
        return m_TopSkipRows;
    }

    public void setTopSkipRows(int topSkipRows) {
        m_TopSkipRows = topSkipRows;
    }

    public int getTopSkipCols() {
        return m_TopSkipCols;
    }

    public void setTopSkipCols(int topSkipCols) {
        m_TopSkipCols = topSkipCols;
    }

    public int getDataType2SartRow() {
        return m_DataType2SartRow;
    }

    public void setDataType2SartRow(int mDataType2SartRow) {
        m_DataType2SartRow = mDataType2SartRow;
    }

    public Map<Integer, FrameworkEnums.EnumDBDataType> getDataTypeByColumn() {
        return m_DataTypeByColumn;
    }

    public void setDataTypeByColumn(
            Map<Integer, FrameworkEnums.EnumDBDataType> dataTypeByColumn) {
        m_DataTypeByColumn = dataTypeByColumn;
    }

    public Map<Integer, String> getDataFormatByColumn() {
        return m_DataFormatByColumn;
    }

    public void setDataFormatByColumn(Map<Integer, String> dataFormatByColumn) {
        m_DataFormatByColumn = dataFormatByColumn;
    }

    public Map<Integer, FrameworkEnums.EnumDBDataType> getDataTypeByColumn2() {
        return m_DataTypeByColumn2;
    }

    public void setDataTypeByColumn2(
            Map<Integer, FrameworkEnums.EnumDBDataType> mDataTypeByColumn2) {
        m_DataTypeByColumn2 = mDataTypeByColumn2;
    }

    public Map<Integer, String> getDataFormatByColumn2() {
        return m_DataFormatByColumn2;
    }

    public void setDataFormatByColumn2(Map<Integer, String> mDataFormatByColumn2) {
        m_DataFormatByColumn2 = mDataFormatByColumn2;
    }

    public Object[][] getSourceData() {
        return m_SourceData;
    }

    public void setSourceData(Object[][] sourceData) {
        m_SourceData = sourceData;
    }

    /**
     * 生成Excel文件
     *
     * @throws Exception
     */
    public void start() throws Exception {
        try {
            // 用SXSSFWorkbook设置缓存数据，处理批量写入
            Workbook workbook = new SXSSFWorkbook(1000);
            Sheet sheet = null;
            if (m_SheetName.isEmpty()) {
                sheet = workbook.createSheet();
            } else {
                sheet = workbook.createSheet(m_SheetName);
            }

            // 写入数据
            for (int rIndex = 0; rIndex < m_SourceData.length; rIndex++) {
                int dataRIndex = rIndex + m_TopSkipRows;
                Row row = sheet.createRow(dataRIndex);
                for (int cIndex = 0; cIndex < m_SourceData[rIndex].length; cIndex++) {
                    int dataCIndex = cIndex + m_TopSkipCols;
                    Map<Integer, FrameworkEnums.EnumDBDataType> dataTypeByColumn = m_DataTypeByColumn;
                    Map<Integer, String> dataFormatByColumn = m_DataFormatByColumn;
                    if ((m_DataType2SartRow > 0) && (dataRIndex >= m_DataType2SartRow)) {
                        dataTypeByColumn = m_DataTypeByColumn2;
                        dataFormatByColumn = m_DataFormatByColumn2;
                    }

                    Cell cell = row.createCell(dataCIndex);
                    Object value = m_SourceData[rIndex][cIndex];
                    if (value == null) {
                        continue;
                    }

                    // 设置但单元格值样式
                    String dataFormat = dataFormatByColumn.get(dataCIndex);
                    if ((dataFormat != null)
                            && ("".equals(dataFormat) == false)) {
                        CellStyle style = workbook.createCellStyle();
                        DataFormat format = workbook.createDataFormat();
                        style.setDataFormat(format.getFormat(dataFormat));
                        cell.setCellStyle(style);
                    }

                    // 设置单元格的值和值类型
                    FrameworkEnums.EnumDBDataType dataType = dataTypeByColumn
                            .get(dataCIndex);
                    if (dataType != null) {
                        switch (dataType) {
                        case AnsiStringFixedLength:
                        case AnsiString:
                        case String:
                        case StringFixedLength:
                            cell.setCellValue(value.toString());
                            break;
                        case Int:
                            int intVal = 0;
                            try {
                                intVal = Integer.parseInt(value.toString());
                            } catch (Exception e) {
                                try {
                                    double tmpVal = Double.parseDouble(value
                                            .toString());
                                    intVal = (int) tmpVal;
                                } catch (Exception ex) {
                                    String
                                            .format(
                                                    "转换成int失败,Row:%s,Column:%s,Message:%s！",
                                                    rIndex, cIndex, e
                                                            .getMessage());
                                }
                            }
                            cell.setCellValue(intVal);
                            break;
                        case Double:
                            double doubleVal = 0.0d;
                            try {
                                doubleVal = Double
                                        .parseDouble(value.toString());
                            } catch (Exception e) {
                                throw new Exception(
                                        String
                                                .format(
                                                        "转换成double失败,Row:%s,Column:%s,Message:%s！",
                                                        rIndex, cIndex, e
                                                                .getMessage()));
                            }
                            cell.setCellValue(doubleVal);
                            break;
                        case Float:
                            float floatVal = 0.0f;
                            try {
                                floatVal = Float.parseFloat(value.toString());
                            } catch (Exception e) {
                                throw new Exception(
                                        String
                                                .format(
                                                        "转换成float失败,Row:%s,Column:%s,Message:%s！",
                                                        rIndex, cIndex, e
                                                                .getMessage()));
                            }
                            cell.setCellValue(floatVal);
                            break;
                        case Long:
                            long longVal = 0l;
                            try {
                                longVal = Long.parseLong(value.toString());
                            } catch (Exception e) {
                                throw new Exception(
                                        String
                                                .format(
                                                        "转换成long失败,Row:%s,Column:%s,Message:%s！",
                                                        rIndex, cIndex, e
                                                                .getMessage()));
                            }
                            cell.setCellValue(longVal);
                            break;
                        case Short:
                            short shortVal = (short) 0;
                            try {
                                shortVal = Short.parseShort(value.toString());
                            } catch (Exception e) {
                                throw new Exception(
                                        String
                                                .format(
                                                        "转换成short失败,Row:%s,Column:%s,Message:%s！",
                                                        rIndex, cIndex, e
                                                                .getMessage()));
                            }
                            cell.setCellValue(shortVal);
                            break;
                        case Date:
                            SimpleDateFormat simpleDateFormat = new SimpleDateFormat(
                                    "yyyy-MM-dd");
                            Date dateVal = null;
                            try {
                                String dateString = simpleDateFormat
                                        .format(value);
                                dateVal = simpleDateFormat.parse(dateString);
                            } catch (Exception e) {
                                throw new Exception(
                                        String
                                                .format(
                                                        "转换成Date失败,Row:%s,Column:%s,Message:%s！",
                                                        rIndex, cIndex, e
                                                                .getMessage()));
                            }
                            cell.setCellValue(dateVal);
                            break;
                        case DateTime:
                        case FullDateTime:
                            simpleDateFormat = new SimpleDateFormat(
                                    "yyyy-MM-dd HH:mm:ss");
                            dateVal = null;
                            try {
                                String dateString = simpleDateFormat
                                        .format(value);
                                dateVal = simpleDateFormat.parse(dateString);
                            } catch (Exception e) {
                                throw new Exception(
                                        String
                                                .format(
                                                        "转换成DateTime失败,Row:%s,Column:%s,Message:%s！",
                                                        rIndex, cIndex, e
                                                                .getMessage()));
                            }
                            cell.setCellValue(dateVal);
                            break;
                        default:
                            cell.setCellValue(value.toString());
                            break;
                        }
                    } else {
                        cell.setCellValue(value.toString());
                    }
                }
            }

            // 写入文件
            OutputStream outputStream = new FileOutputStream(m_FileName);
            workbook.write(outputStream);
            outputStream.close();
        } catch (Exception e) {
            throw new Exception(String.format("start:%s", e.getMessage()));
        }
    }

    /**
     * 设置单元格的值（先执行Start方法）
     *
     * @param sheetIndex
     *            Sheet的索引，从0开始
     * @param row
     *            行索引
     * @param col
     *            列索引
     * @param value
     *            值（暂时只支持字符串）
     * @throws Exception
     */
    public void setCellData(int sheetIndex, int row, int col, String value)
            throws Exception {
        try {
            InputStream inputStream = new FileInputStream(m_FileName);
            XSSFWorkbook workbook = new XSSFWorkbook(inputStream);
            inputStream.close();

            Sheet sheet = workbook.getSheetAt(sheetIndex);

            Row mRow = sheet.getRow(row);
            if (mRow == null) {
                mRow = sheet.createRow(row);
            }
            Cell mCell = mRow.createCell(col);
            mCell.setCellValue(value);

            // 写入文件，采用分批写入的方式进行写入
            OutputStream outputStream = new FileOutputStream(m_FileName);
            SXSSFWorkbook sXSSFWorkbook = new SXSSFWorkbook(workbook, 1000);
            sXSSFWorkbook.write(outputStream);
            outputStream.close();
        } catch (Exception e) {
            throw new Exception(String.format("setCellData:%s", e.getMessage()));
        }
    }

    /**
     * 设置单元格的值，支持/n自动换行（先执行Start方法）
     *
     * @param sheetIndex
     *            Sheet的索引，从0开始
     * @param row
     *            行索引
     * @param col
     *            列索引
     * @param value
     *            值（暂时只支持字符串）
     * @throws Exception
     */
    public void setWrapCellData(int sheetIndex, int row, int col, String value)
            throws Exception {
        try {
            InputStream inputStream = new FileInputStream(m_FileName);
            XSSFWorkbook workbook = new XSSFWorkbook(inputStream);
            inputStream.close();

            Sheet sheet = workbook.getSheetAt(sheetIndex);

            Row mRow = sheet.getRow(row);
            if (mRow == null) {
                mRow = sheet.createRow(row);
            }
            Cell mCell = mRow.createCell(col);
            mCell.setCellValue(value);
            // 设置自动换行
            CellStyle style = workbook.createCellStyle();
            style.setWrapText(true);
            mCell.setCellStyle(style);

            // 写入文件，采用分批写入的方式进行写入
            OutputStream outputStream = new FileOutputStream(m_FileName);
            SXSSFWorkbook sXSSFWorkbook = new SXSSFWorkbook(workbook, 1000);
            sXSSFWorkbook.write(outputStream);
            outputStream.close();
        } catch (Exception e) {
            throw new Exception(String.format("setWrapCellData:%s", e
                    .getMessage()));
        }
    }

    /**
     * 设置单元格数据的水平垂直对齐方式（先执行Start方法）
     *
     * @param sheetIndex
     *            Sheet的索引，从0开始
     * @param startRow
     *            开始行，从0开始
     * @param rowNum
     *            行数
     * @param startCol
     *            开始列，从0开始
     * @param colNum
     *            列数
     * @param alignment
     *            水平展示方式 ALIGN_GENERAL = 0 ALIGN_LEFT = 1 ALIGN_CENTER = 2
     *            ALIGN_RIGHT = 3 ALIGN_FILL = 4 ALIGN_JUSTIFY = 5
     *            ALIGN_CENTER_SELECTION = 6
     * @param verticalAlignment
     *            竖直展示方式 VERTICAL_TOP = 0 VERTICAL_CENTER = 1 VERTICAL_BOTTOM =
     *            2 VERTICAL_JUSTIFY = 3
     * @throws Exception
     */
    public void setAlignment(int sheetIndex, int startRow, int rowNum,
            int startCol, int colNum, short alignment, short verticalAlignment)
            throws Exception {
        try {
            InputStream inputStream = new FileInputStream(m_FileName);
            XSSFWorkbook workbook = new XSSFWorkbook(inputStream);
            inputStream.close();

            Sheet sheet = workbook.getSheetAt(sheetIndex);
            // 设置单元格样式
            for (int rIndex = startRow; rIndex < startRow + rowNum; rIndex++) {
                Row row = sheet.getRow(rIndex);
                if (row == null) {
                    row = sheet.createRow(rIndex);
                }
                for (int cIndex = startCol; cIndex < startCol + colNum; cIndex++) {
                    Cell cell = row.getCell(cIndex);
                    if (cell == null) {
                        cell = row.createCell(cIndex);
                    }

                    CellStyle style = cell.getCellStyle();
                    // 判断是否已经创建过
                    if (style.getIndex() == 0) {
                        style = workbook.createCellStyle();
                    }
                    style.setAlignment(alignment);
                    style.setVerticalAlignment(verticalAlignment);
                    cell.setCellStyle(style);
                }
            }

            // 写入文件，采用分批写入的方式进行写入
            OutputStream outputStream = new FileOutputStream(m_FileName);
            SXSSFWorkbook sXSSFWorkbook = new SXSSFWorkbook(workbook, 1000);
            sXSSFWorkbook.write(outputStream);
            outputStream.close();
        } catch (Exception e) {
            throw new Exception(String
                    .format("setAlignment:%s", e.getMessage()));
        }
    }

    /**
     * 设置单元格的字体及大小（先执行Start方法）
     *
     * @param sheetIndex
     *            Excel索引，从0开始
     * @param startRow
     *            开始行，从0开始
     * @param rowNum
     *            设置的行数
     * @param startCol
     *            开始列，从0开始
     * @param colNum
     *            设置的列数
     * @param font
     *            字体：TimesRoman, Courier, Arial等 风格：三个常量 lFont.PLAIN, Font.BOLD,
     *            Font.ITALIC 字号：字的大小（磅数） 字体名称和大小 BOLDWEIGHT_NORMAL = 400;
     *            BOLDWEIGHT_BOLD = 700
     * @throws Exception
     */
    public void setFont(int sheetIndex, int startRow, int rowNum, int startCol,
            int colNum, java.awt.Font font) throws Exception {
        try {
            InputStream inputStream = new FileInputStream(m_FileName);
            XSSFWorkbook workbook = new XSSFWorkbook(inputStream);
            inputStream.close();

            Font mFont = workbook.createFont();
            mFont.setFontName(font.getFontName());
            mFont.setFontHeightInPoints((short) font.getSize());
            if (font.isBold() == true) {
                mFont.setBoldweight((short) 700);
            } else {
                mFont.setBoldweight((short) 400);
            }

            Sheet sheet = workbook.getSheetAt(sheetIndex);
            // 设置单元格样式
            for (int rIndex = startRow; rIndex < startRow + rowNum; rIndex++) {
                Row row = sheet.getRow(rIndex);
                if (row == null) {
                    row = sheet.createRow(rIndex);
                }
                for (int cIndex = startCol; cIndex < startCol + colNum; cIndex++) {
                    Cell cell = row.getCell(cIndex);
                    if (cell == null) {
                        cell = row.createCell(cIndex);
                    }

                    CellStyle style = cell.getCellStyle();
                    // 判断是否已经创建过
                    if (style.getIndex() == 0) {
                        style = workbook.createCellStyle();
                    }
                    style.setFont(mFont);
                    cell.setCellStyle(style);
                }
            }

            // 写入文件，采用分批写入的方式进行写入
            OutputStream outputStream = new FileOutputStream(m_FileName);
            SXSSFWorkbook sXSSFWorkbook = new SXSSFWorkbook(workbook, 1000);
            sXSSFWorkbook.write(outputStream);
            outputStream.close();
        } catch (Exception e) {
            throw new Exception(String.format("setFont:%s", e.getMessage()));
        }
    }

    /**
     * 设置单元格的字体、大小、颜色（先执行Start方法）
     *
     * @param sheetIndex
     *            Excel索引，从0开始
     * @param startRow
     *            开始行，从0开始
     * @param rowNum
     *            设置的行数
     * @param startCol
     *            开始列，从0开始
     * @param colNum
     *            设置的列数
     * @param font
     *            字体：TimesRoman, Courier, Arial等 风格：三个常量 lFont.PLAIN, Font.BOLD,
     *            Font.ITALIC 字号：字的大小（磅数） 字体名称和大小 BOLDWEIGHT_NORMAL = 400;
     *            BOLDWEIGHT_BOLD = 700
     * @param color
     *            颜色 new Color(54, 201, 201)
     * @throws Exception
     */
    public void setFont(int sheetIndex, int startRow, int rowNum, int startCol,
            int colNum, java.awt.Font font, java.awt.Color color)
            throws Exception {
        try {
            InputStream inputStream = new FileInputStream(m_FileName);
            XSSFWorkbook workbook = new XSSFWorkbook(inputStream);
            inputStream.close();

            XSSFFont mFont = workbook.createFont();
            mFont.setFontName(font.getFontName());
            mFont.setFontHeightInPoints((short) font.getSize());
            mFont.setColor(new XSSFColor(color));
            if (font.isBold() == true) {
                mFont.setBoldweight((short) 700);
            } else {
                mFont.setBoldweight((short) 400);
            }

            Sheet sheet = workbook.getSheetAt(sheetIndex);
            // 设置单元格样式
            for (int rIndex = startRow; rIndex < startRow + rowNum; rIndex++) {
                Row row = sheet.getRow(rIndex);
                if (row == null) {
                    row = sheet.createRow(rIndex);
                }
                for (int cIndex = startCol; cIndex < startCol + colNum; cIndex++) {
                    Cell cell = row.getCell(cIndex);
                    if (cell == null) {
                        cell = row.createCell(cIndex);
                    }

                    CellStyle style = cell.getCellStyle();
                    // 判断是否已经创建过
                    if (style.getIndex() == 0) {
                        style = workbook.createCellStyle();
                    }
                    style.setFont(mFont);
                    cell.setCellStyle(style);
                }
            }

            // 写入文件，采用分批写入的方式进行写入
            OutputStream outputStream = new FileOutputStream(m_FileName);
            SXSSFWorkbook sXSSFWorkbook = new SXSSFWorkbook(workbook, 1000);
            sXSSFWorkbook.write(outputStream);
            outputStream.close();
        } catch (Exception e) {
            throw new Exception(String.format("setFont2:%s", e.getMessage()));
        }
    }

    /**
     * 设置背景色（先执行Start方法）
     *
     * @param sheetIndex
     *            Sheet的索引，从0开始
     * @param startRow
     *            开始行，从0开始
     * @param rowNum
     *            行数
     * @param startCol
     *            开始列，从0开始
     * @param colNum
     *            列数
     * @param color
     *            颜色 new Color(54, 201, 201)
     * @throws Exception
     */
    public void setBackgroundColor(int sheetIndex, int startRow, int rowNum,
            int startCol, int colNum, java.awt.Color color) throws Exception {
        try {
            InputStream inputStream = new FileInputStream(m_FileName);
            XSSFWorkbook workbook = new XSSFWorkbook(inputStream);
            inputStream.close();

            Sheet sheet = workbook.getSheetAt(sheetIndex);
            // 设置单元格样式
            for (int rIndex = startRow; rIndex < startRow + rowNum; rIndex++) {
                Row row = sheet.getRow(rIndex);
                if (row == null) {
                    row = sheet.createRow(rIndex);
                }
                for (int cIndex = startCol; cIndex < startCol + colNum; cIndex++) {
                    Cell cell = row.getCell(cIndex);
                    if (cell == null) {
                        cell = row.createCell(cIndex);
                    }

                    XSSFCellStyle style = (XSSFCellStyle) cell.getCellStyle();
                    // 判断是否已经创建过
                    if (style.getIndex() == 0) {
                        style = workbook.createCellStyle();
                    }
                    style.setFillForegroundColor(new XSSFColor(color));
                    style.setFillPattern(CellStyle.SOLID_FOREGROUND);
                    cell.setCellStyle(style);
                }
            }

            // 写入文件，采用分批写入的方式进行写入
            OutputStream outputStream = new FileOutputStream(m_FileName);
            SXSSFWorkbook sXSSFWorkbook = new SXSSFWorkbook(workbook, 1000);
            sXSSFWorkbook.write(outputStream);
            outputStream.close();
        } catch (Exception e) {
            throw new Exception(String.format("setBackgroudColor:%s", e
                    .getMessage()));
        }
    }

    /**
     * 设置合并单元格（先执行Start方法）
     *
     * @param sheetIndex
     *            Sheet的索引，从0开始
     * @param firstRow
     *            开始行
     * @param lastRow
     *            结束行
     * @param firstCol
     *            开始列
     * @param lastCol
     *            结束列
     * @throws Exception
     */
    public void setMerge(int sheetIndex, int firstRow, int lastRow,
            int firstCol, int lastCol) throws Exception {
        try {
            InputStream inputStream = new FileInputStream(m_FileName);
            XSSFWorkbook workbook = new XSSFWorkbook(inputStream);
            inputStream.close();

            Sheet sheet = workbook.getSheetAt(sheetIndex);
            sheet.addMergedRegion(new CellRangeAddress(firstRow, lastRow,
                    firstCol, lastCol));

            // 写入文件，采用分批写入的方式进行写入
            OutputStream outputStream = new FileOutputStream(m_FileName);
            SXSSFWorkbook sXSSFWorkbook = new SXSSFWorkbook(workbook, 1000);
            sXSSFWorkbook.write(outputStream);
            outputStream.close();
        } catch (Exception e) {
            throw new Exception(String.format("setMerge:%s", e.getMessage()));
        }
    }

    /**
     * 设置单元格的边框（先执行Start方法）
     *
     * @param sheetIndex
     *            Excel索引，从0开始
     * @param startRow
     *            开始行，从0开始
     * @param rowNum
     *            设置的行数
     * @param startCol
     *            开始列，从0开始
     * @param colNum
     *            需要设置的列数
     * @throws Exception
     */
    public void setBorder(int sheetIndex, int startRow, int rowNum,
            int startCol, int colNum) throws Exception {
        try {
            InputStream inputStream = new FileInputStream(m_FileName);
            XSSFWorkbook workbook = new XSSFWorkbook(inputStream);
            inputStream.close();

            Sheet sheet = workbook.getSheetAt(sheetIndex);
            // 设置单元格样式
            for (int rIndex = startRow; rIndex < startRow + rowNum; rIndex++) {
                Row row = sheet.getRow(rIndex);
                if (row == null) {
                    row = sheet.createRow(rIndex);
                }
                for (int cIndex = startCol; cIndex < startCol + colNum; cIndex++) {
                    Cell cell = row.getCell(cIndex);
                    if (cell == null) {
                        cell = row.createCell(cIndex);
                    }

                    CellStyle style = cell.getCellStyle();
                    // 判断是否已经创建过
                    if (style.getIndex() == 0) {
                        style = workbook.createCellStyle();
                    }
                    style.setBorderBottom(CellStyle.BORDER_THIN);
                    style.setBorderLeft(CellStyle.BORDER_THIN);
                    style.setBorderRight(CellStyle.BORDER_THIN);
                    style.setBorderTop(CellStyle.BORDER_THIN);
                    cell.setCellStyle(style);
                }
            }

            // 写入文件，采用分批写入的方式进行写入
            OutputStream outputStream = new FileOutputStream(m_FileName);
            SXSSFWorkbook sXSSFWorkbook = new SXSSFWorkbook(workbook, 1000);
            sXSSFWorkbook.write(outputStream);
            outputStream.close();
        } catch (Exception e) {
            throw new Exception(String.format("setBorder:%s", e.getMessage()));
        }
    }

    /**
     * 设置行的高度（先执行Start方法） 说明：与Excel不是很对应，请多设置几次高度值
     *
     * @param sheetIndex
     *            Excel索引，从0开始
     * @param startRow
     *            开始行，从0开始
     * @param rowNum
     *            行的数量
     * @param height
     *            设置的高度
     * @throws Exception
     */
    public void setRowHeight(int sheetIndex, int startRow, int rowNum,
            short height) throws Exception {
        try {
            InputStream inputStream = new FileInputStream(m_FileName);
            XSSFWorkbook workbook = new XSSFWorkbook(inputStream);
            inputStream.close();

            // 高度特殊处理
            height = (short) (height * 20);

            Sheet sheet = workbook.getSheetAt(sheetIndex);
            for (int rIndex = startRow; rIndex < startRow + rowNum; rIndex++) {
                Row row = sheet.getRow(rIndex);
                if (row == null) {
                    row = sheet.createRow(rIndex);
                }
                row.setHeight(height);
            }

            // 写入文件，采用分批写入的方式进行写入
            OutputStream outputStream = new FileOutputStream(m_FileName);
            SXSSFWorkbook sXSSFWorkbook = new SXSSFWorkbook(workbook, 1000);
            sXSSFWorkbook.write(outputStream);
            outputStream.close();
        } catch (Exception e) {
            throw new Exception(String.format("setAutoFit:%s", e.getMessage()));
        }
    }

    /**
     * 设置列的宽度（先执行Start方法） 说明：与Excel不是很对应，请多设置几次宽度值
     *
     * @param sheetIndex
     *            Excel索引，从0开始
     * @param startCol
     *            开始列，从0开始
     * @param colNum
     *            列数
     * @param width
     *            宽度
     * @throws Exception
     */
    public void setColumnWidth(int sheetIndex, int startCol, int colNum,
            int width) throws Exception {
        try {
            InputStream inputStream = new FileInputStream(m_FileName);
            XSSFWorkbook workbook = new XSSFWorkbook(inputStream);
            inputStream.close();

            // 宽度特殊处理
            width = width * 275;

            Sheet sheet = workbook.getSheetAt(sheetIndex);
            for (int cIndex = startCol; cIndex < startCol + colNum; cIndex++) {
                sheet.setColumnWidth(cIndex, width);
            }

            // 写入文件，采用分批写入的方式进行写入
            OutputStream outputStream = new FileOutputStream(m_FileName);
            SXSSFWorkbook sXSSFWorkbook = new SXSSFWorkbook(workbook, 1000);
            sXSSFWorkbook.write(outputStream);
            outputStream.close();
        } catch (Exception e) {
            throw new Exception(String.format("setAutoFit:%s", e.getMessage()));
        }
    }

    /**
     * 设置列自适应（先执行Start方法）
     *
     * @param sheetIndex
     *            Sheet的索引，从0开始
     * @param startCol
     *            开始列，从0开始
     * @param colNum
     *            列数量
     * @throws Exception
     */
    public void setAutoFit(int sheetIndex, int startCol, int colNum)
            throws Exception {
        try {
            InputStream inputStream = new FileInputStream(m_FileName);
            XSSFWorkbook workbook = new XSSFWorkbook(inputStream);
            inputStream.close();

            Sheet sheet = workbook.getSheetAt(sheetIndex);
            for (int cIndex = startCol; cIndex < startCol + colNum; cIndex++) {
                sheet.autoSizeColumn(cIndex);
            }

            // 写入文件，采用分批写入的方式进行写入
            OutputStream outputStream = new FileOutputStream(m_FileName);
            SXSSFWorkbook sXSSFWorkbook = new SXSSFWorkbook(workbook, 1000);
            sXSSFWorkbook.write(outputStream);
            outputStream.close();
        } catch (Exception e) {
            throw new Exception(String.format("setAutoFit:%s", e.getMessage()));
        }
    }

    /**
     * 合并Excel
     *
     * @param toFileName
     *            写入的文件路径
     * @param toSheetIndex
     *                 写入的文件SheetIndex，如果写在最后请设置-1，否则请在Sheet数量范围内
     * @param fromFileName
     *            读取的文件路径
     * @param fromSheetIndex
     *            读取的文件SheetIndex
     * @throws Exception
     */
    public void mergeExcel(String toFileName, int toSheetIndex, String fromFileName,
            int fromSheetIndex) throws Exception {
        try {
            // 1、打开Excel1
            InputStream inputStream = new FileInputStream(toFileName);
            XSSFWorkbook toWorkbook = new XSSFWorkbook(inputStream);
            inputStream.close();

            // 2、打开Excel2
            inputStream = new FileInputStream(fromFileName);
            XSSFWorkbook fromWorkbook = new XSSFWorkbook(inputStream);
            inputStream.close();

            // 3、复制Sheet，放在ToExcel1的Sheet上
            copySheet(toWorkbook, toSheetIndex, fromWorkbook, fromSheetIndex);

            // 写入Excel1文件
            OutputStream outputStream = new FileOutputStream(toFileName);
            toWorkbook.write(outputStream);
            outputStream.close();
        } catch (Exception e) {
            throw new Exception(String.format("mergeExcel:%s", e.getMessage()));
        }
    }
    private void copySheet(XSSFWorkbook toWorkbook, int toSheetIndex, XSSFWorkbook fromWorkbook,
            int fromSheetIndex) throws Exception {
        Sheet fromSheet = fromWorkbook.cloneSheet(fromSheetIndex);
        String sheetName = fromSheet.getSheetName().replace("(2)", "");
        Sheet toSheet = toWorkbook.getSheet(sheetName);
        if (null == toSheet) {
            toSheet = toWorkbook.createSheet(sheetName);
            if(toSheetIndex >= 0){
                toWorkbook.setSheetOrder(sheetName, toSheetIndex);
            }
        } else {
            throw new Exception("相同名称的Sheet已存在");
        }
        // 1、合并单元格
        for (int mrIndex = 0; mrIndex < fromSheet.getNumMergedRegions(); mrIndex++) {
            CellRangeAddress cellRangeAddress = fromSheet
                    .getMergedRegion(mrIndex);
            toSheet.addMergedRegion(cellRangeAddress);
        }

        // 2、单元格赋值，样式等
        Map<Integer, Integer> setColumnWidthIndex = new HashMap<Integer, Integer>();
        Map<Short, Short> setFontIndex = new HashMap<Short, Short>();
        for (int rIndex = fromSheet.getFirstRowNum(); rIndex <= fromSheet
                .getLastRowNum(); rIndex++) {
            Row fromRow = fromSheet.getRow(rIndex);
            if (null == fromRow) {
                continue;
            }
            Row toRow = toSheet.createRow(rIndex);

            // 设置行高，自动行高即可
            //toRow.setHeight(fromRow.getHeight());
            // 设置Cell的值和样式
            for (int cIndex = fromRow.getFirstCellNum(); cIndex <= fromRow
                    .getLastCellNum(); cIndex++) {
                Cell fromCell = fromRow.getCell(cIndex);
                if (null == fromCell) {
                    continue;
                }
                Cell toCell = toRow.createCell(cIndex);
                // 设置列宽
                Integer isSet = setColumnWidthIndex.get(cIndex);
                if (null == isSet) {
                    toSheet.setColumnWidth(cIndex, fromSheet
                            .getColumnWidth(cIndex));
                    setColumnWidthIndex.put(cIndex, cIndex);
                }
                // 设置单元格样式
                CellStyle fromCellStyle = fromCell.getCellStyle();
                if (fromCellStyle.getIndex() != 0) {
                    XSSFCellStyle toCellStyle = toWorkbook.createCellStyle();
                    // 文字展示样式
                    String fromDataFormat = fromCellStyle.getDataFormatString();
                    if ((null != fromDataFormat)
                            && ("".equals(fromDataFormat) == false)) {
                        DataFormat toDataFormat = toWorkbook.createDataFormat();
                        toCellStyle.setDataFormat(toDataFormat
                                .getFormat(fromDataFormat));

                    }
                    // 文字换行
                    toCellStyle.setWrapText(fromCellStyle.getWrapText());
                    // 文字对齐方式
                    toCellStyle.setAlignment(fromCellStyle.getAlignment());
                    toCellStyle.setVerticalAlignment(fromCellStyle
                            .getVerticalAlignment());
                    // 单元格边框
                    toCellStyle.setBorderLeft(fromCellStyle.getBorderLeft());
                    toCellStyle.setBorderRight(fromCellStyle.getBorderRight());
                    toCellStyle.setBorderTop(fromCellStyle.getBorderTop());
                    toCellStyle
                            .setBorderBottom(fromCellStyle.getBorderBottom());
                    // 字体颜色，大小
                    short fromFontIndex = fromCellStyle.getFontIndex();
                    XSSFFont fromFont = fromWorkbook.getFontAt(fromFontIndex);
                    Short toFontIndex = setFontIndex.get(fromFontIndex);
                    if (null == toFontIndex) {
                        XSSFFont toFont = toWorkbook.createFont();
                        toFont.setBoldweight(fromFont.getBoldweight());
                        toFont.setFontName(fromFont.getFontName());
                        toFont.setFontHeightInPoints(fromFont
                                .getFontHeightInPoints());
                        toFont.setColor(fromFont.getXSSFColor());
                        toFont.setBold(fromFont.getBold());
                        toCellStyle.setFont(toFont);
                        // 设置的Font加入集合中
                        toFontIndex = toFont.getIndex();
                        setFontIndex.put(fromFontIndex, toFontIndex);
                    } else {
                        XSSFFont toFont = toWorkbook.getFontAt(toFontIndex);
                        toCellStyle.setFont(toFont);
                    }
                    // 背景色
                    XSSFColor fillForegroundColor = (XSSFColor) fromCellStyle
                            .getFillForegroundColorColor();
                    toCellStyle.setFillForegroundColor(fillForegroundColor);
                    toCellStyle.setFillPattern(fromCellStyle.getFillPattern());

                    toCell.setCellStyle(toCellStyle);
                }

                int fromCellType = fromCell.getCellType();
                switch (fromCellType) {
                case Cell.CELL_TYPE_STRING:
                    toCell.setCellValue(fromCell.getStringCellValue());
                    break;
                case Cell.CELL_TYPE_NUMERIC:
                    toCell.setCellValue(fromCell.getNumericCellValue());
                    break;
                case Cell.CELL_TYPE_BOOLEAN:
                    toCell.setCellValue(fromCell.getBooleanCellValue());
                    break;
                default:
                    toCell.setCellValue(fromCell.getStringCellValue());
                    break;
                }
            }
        }
    }

}

3、源码下载

SRC