• 通过POI来进行单元格格式的设定

设定格式使用「HSSFCellStyle」类。它有一个构造方法:

protected HSSFCellStyle(short index, ExtendedFormatRecord rec)

虽然有构造方法,但却是protected的,所以不能直接使用,要通过一个工作簿workbook来生成格式对象。 

在POI里,格式好像是以workbook为单位来管理的,所以要先作成一个格式对象,保存在workbook里,然后再对已生成好的单元格进行设定。 



  • 在单元格里指定格式

1,要作成一个格式对象,可以使用「HSSFWorkbook」类的「createCellStyle」方法。 

public HSSFCellStyle createCellStyle()

2,要取出现有的格式对象的话,使用「HSSFWorkbook」类的「getCellStyleAt」方法,这个方法有参数,是被保存格式的INDEX号。 

public HSSFCellStyle getCellStyleAt(short idx)

3,对于某一个单元格,也可以取出它的格式对象。这时要使用「HSSFCell」类的「getCellStyle」方法。 

public HSSFCellStyle getCellStyle()

4,这样的话,不管是新创建的或者是从现有的单元格里取出来的格式对象,都可以用来对某一个单元格进行格式的设定。设定方法使用「HSSFCell」类的「setCellStyle」方法。 

public void setCellStyle(HSSFCellStyle style)

package linkin;

import java.io.FileOutputStream;
import java.io.IOException; import org.apache.poi.hssf.usermodel.HSSFCell;
import org.apache.poi.hssf.usermodel.HSSFCellStyle;
import org.apache.poi.hssf.usermodel.HSSFRow;
import org.apache.poi.hssf.usermodel.HSSFSheet;
import org.apache.poi.hssf.usermodel.HSSFWorkbook;
import org.apache.poi.hssf.util.HSSFColor; public class Linkin
{
public static void main(String[] args)
{
HSSFWorkbook workbook = new HSSFWorkbook(); HSSFSheet sheet = workbook.createSheet();
HSSFRow row = sheet.createRow(1);//第二行 HSSFCell cell = row.createCell(0);//2,1格
cell.setCellValue("sample");//写入sample HSSFCellStyle style = workbook.createCellStyle();//创建个workbook的HSSFCellStyle格式对象style //设定格式
style.setFillBackgroundColor(HSSFColor.WHITE.index);
style.setFillForegroundColor(HSSFColor.LIGHT_ORANGE.index);
style.setFillPattern(HSSFCellStyle.THICK_HORZ_BANDS); cell.setCellStyle(style);//对2,1格写入上面的格式 FileOutputStream out = null;
try
{
out = new FileOutputStream("sample.xls");
workbook.write(out);
}
catch (IOException e)
{
System.out.println(e.toString());
}
finally
{
try
{
out.close();
}
catch (IOException e)
{
System.out.println(e.toString());
}
}
}
}

 

  • POI单元格颜色设定

先从单元格顔色设定开始介绍。单元格的顔色有前景色和背景色。 

1,前景色的设定使用「HSSFCellStyle」类的「setFillForegroundColor」方法。 

public void setFillForegroundColor(short bg)

2,背景色的设定则使用「HSSFCellStyle」类的「setFillBackgroundColor」方法。 

public void setFillBackgroundColor(short bg)

两个方法都是通过参数来设定具体什么顔色。该参数类型为short型,在「HSSFColor」类里,准备了各种各样顔色的定义值。 



  • HSSFColor类

HSSFColor类定义如下:public class HSSFColor extends java.lang.Object 

而各种顔色又是作为HSSFColor类的子类,定义一览表如下: 

HSSFColor.AQUA    HSSFColor.BLACK

HSSFColor.BLUE    
HSSFColor.BLUE_GREY

HSSFColor.BRIGHT_GREEN HSSFColor.BROWN

HSSFColor.CORAL HSSFColor.CORNFLOWER_BLUE

HSSFColor.DARK_BLUE HSSFColor.DARK_GREEN

HSSFColor.DARK_RED HSSFColor.DARK_TEAL

HSSFColor.DARK_YELLOW HSSFColor.GOLD

HSSFColor.GREEN HSSFColor.GREY_25_PERCENT

HSSFColor.GREY_40_PERCENT HSSFColor.GREY_50_PERCENT

HSSFColor.GREY_80_PERCENT HSSFColor.INDIGO

HSSFColor.LAVENDER HSSFColor.LEMON_CHIFFON

HSSFColor.LIGHT_BLUE HSSFColor.LIGHT_CORNFLOWER_BLUE

HSSFColor.LIGHT_GREEN HSSFColor.LIGHT_ORANGE

HSSFColor.LIGHT_TURQUOISE HSSFColor.LIGHT_YELLOW

HSSFColor.LIME HSSFColor.MAROON

HSSFColor.OLIVE_GREEN HSSFColor.ORANGE

HSSFColor.ORCHID HSSFColor.PALE_BLUE

HSSFColor.PINK HSSFColor.PLUM

HSSFColor.RED HSSFColor.ROSE

HSSFColor.ROYAL_BLUE HSSFColor.SEA_GREEN

HSSFColor.SKY_BLUE HSSFColor.TAN

HSSFColor.TEAL HSSFColor.TURQUOISE

HSSFColor.VIOLET HSSFColor.WHITE

HSSFColor.YELLOW

设定顔色时,用这些子类的静态常量「index」作为参数,使用方法如下:

HSSFWorkbook workbook = new HSSFWorkbook();
HSSFCellStyle style = workbook.createCellStyle();
style.setFillForegroundColor(HSSFColor.LIME.index);
style.setFillBackgroundColor(HSSFColor.GREEN.index);

如果这些顔色还不够你用的话,那么下面介绍怎么设定自己想要的顔色。

  • 填充模式

1,指定填充模式的话,使用「HSSFCellStyle」类的「setFillPattern」方法。 

public void setFillPattern(short fp)



2,指定的填充模式,在「HSSFCellStyle」类里也有定义,类型为static short型,如下所示: 

值 说明

NO_FILL No background

SOLID_FOREGROUND Solidly filled

FINE_DOTS Small fine dots

ALT_BARS Wide dots

SPARSE_DOTS Sparse dots

THICK_HORZ_BANDS Thick horizontal bands

THICK_VERT_BANDS Thick vertical bands

THICK_BACKWARD_DIAG Thick backward facing diagonals

THICK_FORWARD_DIAG Thick forward facing diagonals

BIG_SPOTS Large spots

BRICKS Brick-like layout

THIN_HORZ_BANDS Thin horizontal bands

THIN_VERT_BANDS Thin vertical bands

THIN_BACKWARD_DIAG Thin backward diagonal

THIN_FORWARD_DIAG Thin forward diagonal

SQUARES Squares

DIAMONDS Diamonds

  • 实际的使用方法如下: 
HSSFWorkbook workbook = new HSSFWorkbook();
HSSFCellStyle style = workbook.createCellStyle();
style.setFillForegroundColor(HSSFColor.LIME.index);
style.setFillBackgroundColor(HSSFColor.GREEN.index);
style.setFillPattern(HSSFCellStyle.SOLID_FOREGROUND);
package linkin;

import java.io.FileOutputStream;
import java.io.IOException; import org.apache.poi.hssf.usermodel.HSSFCell;
import org.apache.poi.hssf.usermodel.HSSFCellStyle;
import org.apache.poi.hssf.usermodel.HSSFRow;
import org.apache.poi.hssf.usermodel.HSSFSheet;
import org.apache.poi.hssf.usermodel.HSSFWorkbook;
import org.apache.poi.hssf.util.HSSFColor; public class Linkin
{
static HSSFWorkbook workbook; public static void main(String[] args)
{
workbook = new HSSFWorkbook(); HSSFSheet sheet = workbook.createSheet(); HSSFRow row[] = new HSSFRow[12];
for (int i = 0; i < 12; i++)
{
row[i] = sheet.createRow(i);
} HSSFCell cell[][] = new HSSFCell[12][4];
for (int i = 0; i < 12; i++)
{
for (int j = 0; j < 4; j++)
{
cell[i][j] = row[i].createCell((short) j);
}
} setStyle(cell[0][0], "AQUA", HSSFColor.AQUA.index);
setStyle(cell[0][1], "BLACK", HSSFColor.BLACK.index);
setStyle(cell[0][2], "BLUE", HSSFColor.BLUE.index);
setStyle(cell[0][3], "BLUE_GREY", HSSFColor.BLUE_GREY.index);
setStyle(cell[1][0], "BRIGHT_GREEN", HSSFColor.BRIGHT_GREEN.index);
setStyle(cell[1][1], "BROWN", HSSFColor.BROWN.index);
setStyle(cell[1][2], "CORAL", HSSFColor.CORAL.index);
setStyle(cell[1][3], "CORNFLOWER_BLUE", HSSFColor.CORNFLOWER_BLUE.index);
setStyle(cell[2][0], "DARK_BLUE", HSSFColor.DARK_BLUE.index);
setStyle(cell[2][1], "DARK_GREEN", HSSFColor.DARK_GREEN.index);
setStyle(cell[2][2], "DARK_RED", HSSFColor.DARK_RED.index);
setStyle(cell[2][3], "DARK_TEAL", HSSFColor.DARK_TEAL.index);
setStyle(cell[3][0], "DARK_YELLOW", HSSFColor.DARK_YELLOW.index);
setStyle(cell[3][1], "GOLD", HSSFColor.GOLD.index);
setStyle(cell[3][2], "GREEN", HSSFColor.GREEN.index);
setStyle(cell[3][3], "GREY_25_PERCENT", HSSFColor.GREY_25_PERCENT.index);
setStyle(cell[4][0], "GREY_40_PERCENT", HSSFColor.GREY_40_PERCENT.index);
setStyle(cell[4][1], "GREY_50_PERCENT", HSSFColor.GREY_50_PERCENT.index);
setStyle(cell[4][2], "GREY_80_PERCENT", HSSFColor.GREY_80_PERCENT.index);
setStyle(cell[4][3], "INDIGO", HSSFColor.INDIGO.index);
setStyle(cell[5][0], "LAVENDER", HSSFColor.LAVENDER.index);
setStyle(cell[5][1], "LEMON_CHIFFON", HSSFColor.LEMON_CHIFFON.index);
setStyle(cell[5][2], "LIGHT_BLUE", HSSFColor.LIGHT_BLUE.index);
setStyle(cell[5][3], "LIGHT_CORNFLOWER_BLUE", HSSFColor.LIGHT_CORNFLOWER_BLUE.index);
setStyle(cell[6][0], "LIGHT_GREEN", HSSFColor.LIGHT_GREEN.index);
setStyle(cell[6][1], "LIGHT_ORANGE", HSSFColor.LIGHT_ORANGE.index);
setStyle(cell[6][2], "LIGHT_TURQUOISE", HSSFColor.LIGHT_TURQUOISE.index);
setStyle(cell[6][3], "LIGHT_YELLOW", HSSFColor.LIGHT_YELLOW.index);
setStyle(cell[7][0], "LIME", HSSFColor.LIME.index);
setStyle(cell[7][1], "MAROON", HSSFColor.MAROON.index);
setStyle(cell[7][2], "OLIVE_GREEN", HSSFColor.OLIVE_GREEN.index);
setStyle(cell[7][3], "ORANGE", HSSFColor.ORANGE.index);
setStyle(cell[8][0], "ORCHID", HSSFColor.ORCHID.index);
setStyle(cell[8][1], "PALE_BLUE", HSSFColor.PALE_BLUE.index);
setStyle(cell[8][2], "PINK", HSSFColor.PINK.index);
setStyle(cell[8][3], "PLUM", HSSFColor.PLUM.index);
setStyle(cell[9][0], "RED", HSSFColor.RED.index);
setStyle(cell[9][1], "ROSE", HSSFColor.ROSE.index);
setStyle(cell[9][2], "ROYAL_BLUE", HSSFColor.ROYAL_BLUE.index);
setStyle(cell[9][3], "SEA_GREEN", HSSFColor.SEA_GREEN.index);
setStyle(cell[10][0], "SKY_BLUE", HSSFColor.SKY_BLUE.index);
setStyle(cell[10][1], "TAN", HSSFColor.TAN.index);
setStyle(cell[10][2], "TEAL", HSSFColor.TEAL.index);
setStyle(cell[10][3], "TURQUOISE", HSSFColor.TURQUOISE.index);
setStyle(cell[11][0], "VIOLET", HSSFColor.VIOLET.index);
setStyle(cell[11][1], "WHITE", HSSFColor.WHITE.index);
setStyle(cell[11][2], "YELLOW", HSSFColor.YELLOW.index); FileOutputStream out = null;
try
{
out = new FileOutputStream("sample.xls");
workbook.write(out);
}
catch (IOException e)
{
System.out.println(e.toString());
}
finally
{
try
{
out.close();
}
catch (IOException e)
{
System.out.println(e.toString());
}
}
} public static void setStyle(HSSFCell cell, String col, short fg)
{
HSSFCellStyle style = workbook.createCellStyle();
style.setFillForegroundColor(fg);
style.setFillPattern(HSSFCellStyle.SOLID_FOREGROUND);
cell.setCellStyle(style); cell.setCellValue(col);
}
}



上面程序只指定了「ForegroundColor」,填充模式是「SOLID_FOREGROUND」,因此顔色应该是全部充满整个单元格的





package linkin;

import java.io.FileOutputStream;
import java.io.IOException; import org.apache.poi.hssf.usermodel.HSSFCell;
import org.apache.poi.hssf.usermodel.HSSFCellStyle;
import org.apache.poi.hssf.usermodel.HSSFRow;
import org.apache.poi.hssf.usermodel.HSSFSheet;
import org.apache.poi.hssf.usermodel.HSSFWorkbook;
import org.apache.poi.hssf.util.HSSFColor; public class Linkin
{
static HSSFWorkbook workbook; public static void main(String[] args)
{
workbook = new HSSFWorkbook(); HSSFSheet sheet = workbook.createSheet(); HSSFRow row[] = new HSSFRow[5];
for (int i = 0; i < 5; i++)
{
row[i] = sheet.createRow(i);
} HSSFCell cell[][] = new HSSFCell[5][4];
for (int i = 0; i < 5; i++)
{
for (int j = 0; j < 4; j++)
{
cell[i][j] = row[i].createCell((short) j);
}
} setStyle(cell[0][0], "NO_FILL", HSSFCellStyle.NO_FILL);
setStyle(cell[0][1], "SOLID_FOREGROUND", HSSFCellStyle.SOLID_FOREGROUND);
setStyle(cell[0][2], "FINE_DOTS", HSSFCellStyle.FINE_DOTS);
setStyle(cell[0][3], "ALT_BARS", HSSFCellStyle.ALT_BARS); setStyle(cell[1][0], "SPARSE_DOTS", HSSFCellStyle.SPARSE_DOTS);
setStyle(cell[1][1], "THICK_HORZ_BANDS", HSSFCellStyle.THICK_HORZ_BANDS);
setStyle(cell[1][2], "THICK_VERT_BANDS", HSSFCellStyle.THICK_VERT_BANDS);
setStyle(cell[1][3], "THICK_BACKWARD_DIAG", HSSFCellStyle.THICK_BACKWARD_DIAG); setStyle(cell[2][0], "THICK_FORWARD_DIAG", HSSFCellStyle.THICK_FORWARD_DIAG);
setStyle(cell[2][1], "BIG_SPOTS", HSSFCellStyle.BIG_SPOTS);
setStyle(cell[2][2], "BRICKS", HSSFCellStyle.BRICKS);
setStyle(cell[2][3], "THIN_HORZ_BANDS", HSSFCellStyle.THIN_HORZ_BANDS); setStyle(cell[3][0], "THIN_VERT_BANDS", HSSFCellStyle.THIN_VERT_BANDS);
setStyle(cell[3][1], "THIN_BACKWARD_DIAG", HSSFCellStyle.THIN_BACKWARD_DIAG);
setStyle(cell[3][2], "THIN_FORWARD_DIAG", HSSFCellStyle.THIN_FORWARD_DIAG);
setStyle(cell[3][3], "SQUARES", HSSFCellStyle.SQUARES); setStyle(cell[4][0], "DIAMONDS", HSSFCellStyle.DIAMONDS); FileOutputStream out = null;
try
{
out = new FileOutputStream("sample.xls");
workbook.write(out);
}
catch (IOException e)
{
System.out.println(e.toString());
}
finally
{
try
{
out.close();
}
catch (IOException e)
{
System.out.println(e.toString());
}
}
} public static void setStyle(HSSFCell cell, String fps, short fp)
{
HSSFCellStyle style = workbook.createCellStyle();
style.setFillForegroundColor(HSSFColor.WHITE.index);
style.setFillForegroundColor(HSSFColor.LIGHT_ORANGE.index);
style.setFillPattern(fp);
cell.setCellStyle(style); cell.setCellValue(fps);
}
}

上面固定了「ForegroundColor」和「BackgroundColor」,而填充模式则做了各种尝试

  • POI设置边框

在做一个电子表格时,边框的设置有时是必不可少的。这一节就来介绍边框,设置时,可以指定边框的位置,边框的种类,边框的顔色。 首先是边框的位置和种类。对单元格设置边框时,有上下左右位置之分,所以POI也准备了四个不同的方法。 

上部的边框: public void setBorderTop(short border)

下部的边框: public void setBorderBottom(short border)

左侧的边框: public void setBorderLeft(short border)

右侧的边框: public void setBorderRight(short border)



参数通过表示边框种类的short型值来指定。下面是定义在「HSSFCellStyle」类里可以被指定值的一览表。 

值 说明

BORDER_DASH_DOT dash-dot border

BORDER_DASH_DOT_DOT dash-dot-dot border

BORDER_DASHED dash border

BORDER_DOTTED dot borderhair-line border

BORDER_DOUBLE double-line border

BORDER_HAIR hair-line border

BORDER_MEDIUM Medium border

BORDER_MEDIUM_DASH_DOT medium dash-dot border

BORDER_MEDIUM_DASH_DOT_DOT medium dash-dot-dot border

BORDER_MEDIUM_DASHED Medium dashed border

BORDER_NONE No border

BORDER_SLANTED_DASH_DOT slanted dash-dot border

BORDER_THICK Thick border

BORDER_THIN Thin border



比如要在单元格下边框设置两重线的边框时,按如下方法: 

HSSFWorkbook workbook = new HSSFWorkbook();
HSSFCellStyle style = workbook.createCellStyle();
style.setBorderRight(HSSFCellStyle.BORDER_THIN);

下面再看看指定边框顔色。同样也分为上下左右边框来操作。 

上部的边框: public void setTopBorderColor(short color)

下部的边框: public void setBottomBorderColor(short color)

左侧的边框: public void setLeftBorderColor(short color)

右侧的边框: public void setRightBorderColor(short color)



仍然是通过参数来指定顔色,而且使用方法和前面一节也是一样。具体如下:

HSSFWorkbook workbook = new HSSFWorkbook();
HSSFCellStyle style = workbook.createCellStyle();
style.setRightBorderColor(HSSFColor.RED.index);
style.setBorderRight(HSSFCellStyle.BORDER_THIN);
package linkin;

import java.io.FileOutputStream;
import java.io.IOException; import org.apache.poi.hssf.usermodel.HSSFCell;
import org.apache.poi.hssf.usermodel.HSSFCellStyle;
import org.apache.poi.hssf.usermodel.HSSFRow;
import org.apache.poi.hssf.usermodel.HSSFSheet;
import org.apache.poi.hssf.usermodel.HSSFWorkbook;
import org.apache.poi.hssf.util.HSSFColor; public class Linkin
{
public static void main(String[] args)
{
HSSFWorkbook workbook = new HSSFWorkbook();
HSSFSheet sheet = workbook.createSheet(); HSSFRow row = sheet.createRow(1);
HSSFCell cell1 = row.createCell((short) 1);
HSSFCell cell2 = row.createCell((short) 2); HSSFCellStyle style1 = workbook.createCellStyle();
style1.setBorderTop(HSSFCellStyle.BORDER_DOUBLE);
style1.setBorderLeft(HSSFCellStyle.BORDER_DOUBLE);
style1.setTopBorderColor(HSSFColor.GOLD.index);
style1.setLeftBorderColor(HSSFColor.PLUM.index);
cell1.setCellStyle(style1); HSSFCellStyle style2 = workbook.createCellStyle();
style2.setBorderBottom(HSSFCellStyle.BORDER_DOUBLE);
style2.setBorderRight(HSSFCellStyle.BORDER_DOUBLE);
style2.setBottomBorderColor(HSSFColor.ORANGE.index);
style2.setRightBorderColor(HSSFColor.SKY_BLUE.index);
cell2.setCellStyle(style2); cell1.setCellValue("U & L");
cell2.setCellValue("B & R"); FileOutputStream out = null;
try
{
out = new FileOutputStream("sample.xls");
workbook.write(out);
}
catch (IOException e)
{
System.out.println(e.toString());
}
finally
{
try
{
out.close();
}
catch (IOException e)
{
System.out.println(e.toString());
}
}
}
}

上面程序既改了顔色,也设置了上和左的边框各一个,右和下的边框各一个。

package linkin;

import java.io.FileOutputStream;
import java.io.IOException; import org.apache.poi.hssf.usermodel.HSSFCell;
import org.apache.poi.hssf.usermodel.HSSFCellStyle;
import org.apache.poi.hssf.usermodel.HSSFRow;
import org.apache.poi.hssf.usermodel.HSSFSheet;
import org.apache.poi.hssf.usermodel.HSSFWorkbook;
import org.apache.poi.hssf.util.HSSFColor; public class Linkin
{
static HSSFWorkbook workbook; public static void main(String[] args)
{
workbook = new HSSFWorkbook(); HSSFSheet sheet = workbook.createSheet(); HSSFRow row[] = new HSSFRow[5];
for (int i = 0; i < 5; i++)
{
row[i] = sheet.createRow(i);
} HSSFCell cell[][] = new HSSFCell[5][3];
for (int i = 0; i < 5; i++)
{
for (int j = 0; j < 3; j++)
{
cell[i][j] = row[i].createCell((short) j);
}
} setStyle(cell[0][0], "DASH_DOT", HSSFCellStyle.BORDER_DASH_DOT);
setStyle(cell[0][1], "DASH_DOT_DOT", HSSFCellStyle.BORDER_DASH_DOT_DOT);
setStyle(cell[0][2], "DASHED", HSSFCellStyle.BORDER_DASHED); setStyle(cell[1][0], "DOTTED", HSSFCellStyle.BORDER_DOTTED);
setStyle(cell[1][1], "DOUBLE", HSSFCellStyle.BORDER_DOUBLE);
setStyle(cell[1][2], "HAIR", HSSFCellStyle.BORDER_HAIR); setStyle(cell[2][0], "MEDIUM", HSSFCellStyle.BORDER_MEDIUM);
setStyle(cell[2][1], "MEDIUM_DASH_DOT", HSSFCellStyle.BORDER_MEDIUM_DASH_DOT);
setStyle(cell[2][2], "MEDIUM_DASH_DOT_DOT", HSSFCellStyle.BORDER_MEDIUM_DASH_DOT_DOT); setStyle(cell[3][0], "MEDIUM_DASHED", HSSFCellStyle.BORDER_MEDIUM_DASHED);
setStyle(cell[3][1], "NONE", HSSFCellStyle.BORDER_NONE);
setStyle(cell[3][2], "SLANTED_DASH_DOT", HSSFCellStyle.BORDER_SLANTED_DASH_DOT); setStyle(cell[4][0], "THICK", HSSFCellStyle.BORDER_THICK);
setStyle(cell[4][1], "THIN", HSSFCellStyle.BORDER_THIN); FileOutputStream out = null;
try
{
out = new FileOutputStream("sample.xls");
workbook.write(out);
}
catch (IOException e)
{
System.out.println(e.toString());
}
finally
{
try
{
out.close();
}
catch (IOException e)
{
System.out.println(e.toString());
}
}
} public static void setStyle(HSSFCell cell, String bn, short border)
{
HSSFCellStyle style = workbook.createCellStyle();
style.setBorderBottom(border);
style.setBottomBorderColor(HSSFColor.ORANGE.index);
cell.setCellStyle(style); cell.setCellValue(bn);
}
}

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