设置颜色,设置前景色

style.setFillForegroundColor(HSSFColor.HSSFColorPredefined.GREY_25_PERCENT.getIndex());

style.setFillPattern(FillPatternType.SOLID_FOREGROUND);

设置居中对齐

//设置水平对齐的样式为居中对齐;

style.setAlignment(HSSFCellStyle.ALIGN_CENTER);

//设置垂直对齐的样式为居中对齐;

style.setVerticalAlignment(HSSFCellStyle.VERTICAL_CENTER);

自适应宽度

//自动设置行高

int colLength = cell.getStringCellValue().getBytes().length*256; //

sheet.setColumnWidth(col, colLength);

package com.hwt.glmf.common;

import java.io.IOException;

import java.io.OutputStream;

import java.util.ArrayList;

import java.util.List;

import javax.servlet.http.HttpServletResponse;

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

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

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

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

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.CellRangeAddress;

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

/**

* 导出Excel公共方法

* @version 1.0

*

* @author wangcp

*

*/

public class ExportExcel extends BaseAction {

//显示的导出表的标题

private String title;

//导出表的列名

private String[] rowName ;

private List dataList = new ArrayList();

HttpServletResponse response;

//构造方法，传入要导出的数据

public ExportExcel(String title,String[] rowName,List dataList){

this.dataList = dataList;

this.rowName = rowName;

this.title = title;

}

/*

* 导出数据

* */

public void export() throws Exception{

try{

HSSFWorkbook workbook = new HSSFWorkbook();// 创建工作簿对象

HSSFSheet sheet = workbook.createSheet(title); // 创建工作表

// 产生表格标题行

HSSFRow rowm = sheet.createRow(0);

HSSFCell cellTiltle = rowm.createCell(0);

//sheet样式定义【getColumnTopStyle()/getStyle()均为自定义方法 - 在下面 - 可扩展】

HSSFCellStyle columnTopStyle = this.getColumnTopStyle(workbook);//获取列头样式对象

HSSFCellStyle style = this.getStyle(workbook);//单元格样式对象

sheet.addMergedRegion(new CellRangeAddress(0, 1, 0, (rowName.length-1)));

cellTiltle.setCellStyle(columnTopStyle);

cellTiltle.setCellValue(title);

// 定义所需列数

int columnNum = rowName.length;

HSSFRow rowRowName = sheet.createRow(2);// 在索引2的位置创建行(最顶端的行开始的第二行)

// 将列头设置到sheet的单元格中

for(int n=0;n

HSSFCell cellRowName = rowRowName.createCell(n);//创建列头对应个数的单元格

cellRowName.setCellType(HSSFCell.CELL_TYPE_STRING);//设置列头单元格的数据类型

HSSFRichTextString text = new HSSFRichTextString(rowName[n]);

cellRowName.setCellValue(text);//设置列头单元格的值

cellRowName.setCellStyle(columnTopStyle);//设置列头单元格样式

}

//将查询出的数据设置到sheet对应的单元格中

for(int i=0;i

Object[] obj = dataList.get(i);//遍历每个对象

HSSFRow row = sheet.createRow(i+3);//创建所需的行数

for(int j=0; j

HSSFCell cell = null; //设置单元格的数据类型

if(j == 0){

cell = row.createCell(j,HSSFCell.CELL_TYPE_NUMERIC);

cell.setCellValue(i+1);

}else{

cell = row.createCell(j,HSSFCell.CELL_TYPE_STRING);

if(!"".equals(obj[j]) && obj[j] != null){

cell.setCellValue(obj[j].toString());//设置单元格的值

}

}

cell.setCellStyle(style);//设置单元格样式

}

}

//让列宽随着导出的列长自动适应

for (int colNum = 0; colNum < columnNum; colNum++) {

int columnWidth = sheet.getColumnWidth(colNum) / 256;

for (int rowNum = 0; rowNum < sheet.getLastRowNum(); rowNum++) {

HSSFRow currentRow;

//当前行未被使用过

if (sheet.getRow(rowNum) == null) {

currentRow = sheet.createRow(rowNum);

} else {

currentRow = sheet.getRow(rowNum);

}

if (currentRow.getCell(colNum) != null) {

HSSFCell currentCell = currentRow.getCell(colNum);

if (currentCell.getCellType() == HSSFCell.CELL_TYPE_STRING) {

int length = currentCell.getStringCellValue().getBytes().length;

if (columnWidth < length) {

columnWidth = length;

}

}

}

}

if(colNum == 0){

sheet.setColumnWidth(colNum, (columnWidth-2) * 256);

}else{

sheet.setColumnWidth(colNum, (columnWidth+4) * 256);

}

}

if(workbook !=null){

try

{

String fileName = "Excel-" + String.valueOf(System.currentTimeMillis()).substring(4, 13) + ".xls";

String headStr = "attachment; filename=\"" + fileName + "\"";

response = getResponse();

response.setContentType("APPLICATION/OCTET-STREAM");

response.setHeader("Content-Disposition", headStr);

OutputStream out = response.getOutputStream();

workbook.write(out);

}

catch (IOException e)

{

e.printStackTrace();

}

}

}catch(Exception e){

e.printStackTrace();

}

}

/*

* 列头单元格样式

*/

public HSSFCellStyle getColumnTopStyle(HSSFWorkbook workbook) {

// 设置字体

HSSFFont font = workbook.createFont();

//设置字体大小

font.setFontHeightInPoints((short)11);

//字体加粗

font.setBoldweight(HSSFFont.BOLDWEIGHT_BOLD);

//设置字体名字

font.setFontName("Courier New");

//设置样式;

HSSFCellStyle style = workbook.createCellStyle();

//设置底边框;

style.setBorderBottom(HSSFCellStyle.BORDER_THIN);

//设置底边框颜色;

style.setBottomBorderColor(HSSFColor.BLACK.index);

//设置左边框;

style.setBorderLeft(HSSFCellStyle.BORDER_THIN);

//设置左边框颜色;

style.setLeftBorderColor(HSSFColor.BLACK.index);

//设置右边框;

style.setBorderRight(HSSFCellStyle.BORDER_THIN);

//设置右边框颜色;

style.setRightBorderColor(HSSFColor.BLACK.index);

//设置顶边框;

style.setBorderTop(HSSFCellStyle.BORDER_THIN);

//设置顶边框颜色;

style.setTopBorderColor(HSSFColor.BLACK.index);

//在样式用应用设置的字体;

style.setFont(font);

//设置自动换行;

style.setWrapText(false);

//设置水平对齐的样式为居中对齐;

style.setAlignment(HSSFCellStyle.ALIGN_CENTER);

//设置垂直对齐的样式为居中对齐;

style.setVerticalAlignment(HSSFCellStyle.VERTICAL_CENTER);

return style;

}

/*

* 列数据信息单元格样式

*/

public HSSFCellStyle getStyle(HSSFWorkbook workbook) {

// 设置字体

HSSFFont font = workbook.createFont();

//设置字体大小

//font.setFontHeightInPoints((short)10);

//字体加粗

//font.setBoldweight(HSSFFont.BOLDWEIGHT_BOLD);

//设置字体名字

font.setFontName("Courier New");

//设置样式;

HSSFCellStyle style = workbook.createCellStyle();

//设置底边框;

style.setBorderBottom(HSSFCellStyle.BORDER_THIN);

//设置底边框颜色;

style.setBottomBorderColor(HSSFColor.BLACK.index);

//设置左边框;

style.setBorderLeft(HSSFCellStyle.BORDER_THIN);

//设置左边框颜色;

style.setLeftBorderColor(HSSFColor.BLACK.index);

//设置右边框;

style.setBorderRight(HSSFCellStyle.BORDER_THIN);

//设置右边框颜色;

style.setRightBorderColor(HSSFColor.BLACK.index);

//设置顶边框;

style.setBorderTop(HSSFCellStyle.BORDER_THIN);

//设置顶边框颜色;

style.setTopBorderColor(HSSFColor.BLACK.index);

//在样式用应用设置的字体;

style.setFont(font);

//设置自动换行;

style.setWrapText(false);

//设置水平对齐的样式为居中对齐;

style.setAlignment(HSSFCellStyle.ALIGN_CENTER);

//设置垂直对齐的样式为居中对齐;

style.setVerticalAlignment(HSSFCellStyle.VERTICAL_CENTER);

return style;

}

}

---------------------

作者：艾伦蓝

来源：CSDN

原文：https://blog.csdn.net/lan12334321234/article/details/70049738

版权声明：本文为博主原创文章，转载请附上博文链接！