使用poi生成Excel文件
import java.io.File;
import java.io.FileInputStream;
import java.io.FileNotFoundException;
import java.io.FileOutputStream;
import java.io.IOException;
import java.util.zip.ZipOutputStream;
import javax.servlet.ServletOutputStream;
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.HSSFRow;
import org.apache.poi.hssf.usermodel.HSSFSheet;
import org.apache.poi.hssf.usermodel.HSSFWorkbook;
import org.apache.poi.hssf.util.Region;
/**
*
* @修改时间：2011-9-24
* @修改内容：添加单元格加边框、自动调整某列宽度、设置合并单元格
*
*/
public class XlsExport {
// 设置cell编码解决中文高位字节截断
// private static short XLS_ENCODING = HSSFWorkbook.ENCODING_UTF_16;
private static enum XlsFormatEm {
DATE("m/d/yy"), NUMBER("0.00"), CURRENCY("#,##0.00"), PERCENT("0.00%");
private final String pattern;
XlsFormatEm(String pattern) {
this.pattern = pattern;
}
public String getPattern() {
return this.pattern;
}
}
private HSSFWorkbook workbook; //定义Excel文档对象
private HSSFSheet sheet; //定义sheet页对象
private HSSFRow row; //定义行对象
private HSSFFont f; //定义字体对象
private HSSFCellStyle style; //定义单元格样式对象
/**
* 构造方法，设置字体、对齐方式、单元格加边框
*
* @param sheetname
* @author tf.li
* @data Sep 24, 2011
*/
public XlsExport(String sheetname) {
this.workbook = new HSSFWorkbook();
// 设置字体
this.f = workbook.createFont();
f.setFontName("宋体");
f.setFontHeightInPoints((short) 12);
this.style = workbook.createCellStyle();
style.setFont(f);
style.setAlignment(HSSFCellStyle.ALIGN_CENTER);// 设置横向居中
style.setVerticalAlignment(HSSFCellStyle.VERTICAL_CENTER);// 设置纵向居中
// 给excel单元格加边框
style.setBorderBottom(HSSFCellStyle.BORDER_THIN);// 下边框
style.setBorderLeft(HSSFCellStyle.BORDER_THIN);// 左边框
style.setBorderRight(HSSFCellStyle.BORDER_THIN);// 右边框
style.setBorderTop(HSSFCellStyle.BORDER_THIN);// 上边框
this.sheet = workbook.createSheet(sheetname);
// this.sheet.setDefaultColumnWidth((short) 18);
}
public XlsExport(HSSFWorkbook workbook, HSSFSheet sheet) {
this.workbook = workbook;
this.sheet = sheet;
// this.sheet.setDefaultColumnWidth((short) 18);
}
/**
* 自动调整某列宽度 setAutoColumnWidth
*
* @param colNum
* @author tf.li
* @data Sep 24, 2011
*/
public void setAutoColumnWidth(short colNum) {
sheet.autoSizeColumn(colNum); // 自动调整某列宽度
}
/**
* 设置合并单元格的区域的风格 setRegionStyle
*
* @param sheet
* @param region
* @param cs
* @author tf.li
* @data Sep 24, 2011
*/
private void setRegionStyle(HSSFSheet sheet, Region region, HSSFCellStyle cs) {
for (int i = region.getRowFrom(); i <= region.getRowTo(); i++) { //循环每一行
HSSFRow row = sheet.getRow(i);
for (int j = region.getColumnFrom(); j <= region.getColumnTo(); j++) {
HSSFCell cell = row.getCell((short) j);
cell.setCellStyle(cs);
}
}
}
/**
* 定义要合并的单元格
* addMerge
* @param rowFrom
* @param columnFrom
* @param rowTo
* @param columnTo
* @author tf.li
* @data Sep 24, 2011
*/
public void addMerge(int rowFrom, short columnFrom, int rowTo, short columnTo) {
Region region = new Region(rowFrom, columnFrom, rowTo, columnTo);// 设置合并的行列
this.setRegionStyle(sheet, region, style);// 设置合并单元格的风格（加边框）
this.sheet.addMergedRegion(region);// 将单元格合并
}
/**
* 导出Excel文件
* exportXls
* @param xlsFileName文件名路径
* @throws RuntimeException
* @author tf.li
* @data Sep 24, 2011
*/
public void exportXls(String xlsFileName) throws RuntimeException {
FileOutputStream fOut = null;
try {
fOut = new FileOutputStream(xlsFileName);
workbook.write(fOut);
fOut.flush();
} catch (FileNotFoundException e) {
RuntimeException fnf = new RuntimeException("生成导出Excel文件出错!", e);
} catch (IOException e) {
RuntimeException io = new RuntimeException("写入Excel文件出错!", e);
} finally {
try {
if (fOut != null) {
fOut.close();
}
} catch (IOException e) {
e.printStackTrace();
}
}
}
/**
* 导出Excel文件
* exportXls
* @param response
* @throws RuntimeException
* @author tf.li
* @data Sep 24, 2011
*/
public void exportXls(HttpServletResponse response) throws RuntimeException {
ServletOutputStream os = null;
try {
os = response.getOutputStream();
workbook.write(os);
os.flush();
} catch (FileNotFoundException e) {
throw new RuntimeException("生成导出Excel文件出错!", e);
} catch (IOException e) {
throw new RuntimeException("写入Excel文件出错!", e);
} finally {
try {
if (os != null)
os.close();
} catch (IOException e) {
e.printStackTrace();
}
}
}
/**
* 增加一行
*
* @param index 行号
*/
public void createRow(HSSFSheet sheet, int index) {
this.row = sheet.createRow(index);
this.row.setHeight((short) 285);// 单位换算20等于excel表中的1
}
/**
* 增加一行
*
* @param index 行号
*/
public void createRow(int index) {
this.row = this.sheet.createRow(index);
this.row.setHeight((short) 285);
}
/**
* 根据行号获取一行
* getRow
* @param rowNum行号
* @return
* @author tf.li
* @data Sep 24, 2011
*/
public HSSFRow getRow(int rowNum) {
return this.sheet.getRow(rowNum);
}
/**
* 设置单元格
*
* @param index 列号
* @param value 单元格填充值
*/
public void setCell(int index, String value) {
HSSFCell cell = this.row.createCell((short) index);
// cell.setEncoding(HSSFCell.ENCODING_UTF_16);
cell.setCellStyle(style);
cell.setCellValue(value);
}
/**
* 设置单元格
*
* @param index 列号
* @param value 单元格填充值
*/
public void setCell(int index, int value) {
HSSFCell cell = this.row.createCell((short) index);
cell.setCellType(HSSFCell.CELL_TYPE_NUMERIC);
cell.setCellStyle(style);
cell.setCellValue(value);
}
/**
* 设置单元格
*
* @param index 列号
* @param value 单元格填充值
*/
public void setCell(int index, double value) {
HSSFCell cell = this.row.createCell((short) index);
// cell.setEncoding(HSSFCell.ENCODING_UTF_16);
cell.setCellStyle(style);
cell.setCellValue(value);
}
/**
* 删除文件
*
* @param filePathAndName 删除文件的路径+文件名
*/
public static void delFile(String filePathAndName) {
try {
String filePath = filePathAndName;
filePath = filePath.toString();
java.io.File myDelFile = new java.io.File(filePath);
myDelFile.delete();
} catch (Exception e) {
System.out.println("删除文件操作出错");
e.printStackTrace();
}
}
/**
*
* @param inputFileName 输入一个文件夹
* @param zipFileName 输出一个压缩文件夹，打包后文件名字
* @throws Exception
*/
public void zip(String inputFileName, String zipFileName) throws Exception {
zip(zipFileName, new File(inputFileName));
}
private void zip(String zipFileName, File inputFile) throws Exception {
ZipOutputStream out = new ZipOutputStream(new FileOutputStream(
zipFileName));
zip(out, inputFile, "");
out.close();
}
private void zip(ZipOutputStream out, File f, String base) throws Exception {
if (f.isDirectory()) { // 判断是否为目录
File[] fl = f.listFiles();
out.putNextEntry(new org.apache.tools.zip.ZipEntry(base + "/"));
base = base.length() == 0 ? "" : base + "/";
for (int i = 0; i < fl.length; i++) {
zip(out, fl[i], base + fl[i].getName());
}
} else { // 压缩目录中的所有文件
out.putNextEntry(new org.apache.tools.zip.ZipEntry(base));
FileInputStream in = new FileInputStream(f);
int b;
System.out.println(base);
while ((b = in.read()) != -1) {
out.write(b);
}
in.close();
}
}
/**
* 新建目录
* newFolder
* @param folderPath
* @author tf.li
* @data Sep 24, 2011
*/
public void newFolder(String folderPath) {
String filePath = folderPath;
filePath = filePath.toString();
java.io.File myFilePath = new java.io.File(filePath);
try {
if (!myFilePath.isDirectory()) { //目录尚不存在
myFilePath.mkdir();
}
} catch (Exception e) {
e.printStackTrace();
}
}
}
示例：
public class Test {
/**
* 生成一个3行3列(不算标题行与列表头)的Excel文件 drawExcel
*
* @author tf.li
* @data Sep 24, 2011
*/
public void drawExcel() {
int row = 3;
int col = 3;
String filePath = "c:/报表/";
String title = "统计表";
XlsExport xlse = new XlsExport(title);
// 第一行，标题行
xlse.createRow(0);
for (int i = 0; i < 3; i++) { // 把这一行里的每个单元都填上，防止出现null
xlse.setCell(i, "");
}
xlse.addMerge(0, (short) 0, 0, (short) 3); // 第一行合并单元格 ltf
// 第二行，放表头
xlse.createRow(1);
for (int i = 0; i < 3; i++) {
xlse.setCell(i, "第"+(i+1)+"列"); }
// 填入数据，开始画表
for (row=0; row<3; row++) {
xlse.createRow(row+2); //从第二行开始
for(col=0; col<3; col++) {
xlse.setCell(col, ((row+1)+","+(col+1)));
}
}
for(int i=0; i<3; i++) {
xlse.setAutoColumnWidth((short)i); //自动调整列宽度 ltf
}
xlse.getRow(0).getCell((short)0).setCellValue(filename); //标题要最后填上，防止把表格第一列宽度撑开ltf
xlse.newFolder(filePath);
xlse.exportXls(filePath + title + ".xls");