package poiexcel;
import java.io.File;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.OutputStream;
import java.lang.reflect.Method;
import java.net.URLEncoder;
import java.text.DecimalFormat;
import java.util.List;
import javax.servlet.http.HttpServletResponse;
import org.apache.poi.hssf.usermodel.HSSFCellStyle;
import org.apache.poi.hssf.usermodel.HSSFFont;
import org.apache.poi.hssf.usermodel.HSSFPalette;
import org.apache.poi.hssf.usermodel.HSSFWorkbook;
import org.apache.poi.ss.usermodel.Cell;
import org.apache.poi.ss.usermodel.CellStyle;
import org.apache.poi.ss.usermodel.Row;
import org.apache.poi.ss.usermodel.Sheet;
import org.apache.poi.ss.util.CellRangeAddress;
public class PoiExcelExport {
HttpServletResponse response;
// 文件名
private String fileName ;
//文件保存路径
private String fileDir;
//sheet名
private String sheetName;
//表头字体
private String titleFontType = "Arial Unicode MS"
;
//表头背景色
private String titleBackColor = "C1FBEE"
;
//表头字号
private short titleFontSize = 12
;
//添加自动筛选的列 如 A:M
private String address = ""
;
//正文字体
private String contentFontType = "Arial Unicode MS"
;
//正文字号
private short contentFontSize = 12
;
//Float类型数据小数位
private String floatDecimal = ".00"
;
//Double类型数据小数位
private String doubleDecimal = ".00"
;
//设置列的公式
private String colFormula[] =
null;
DecimalFormat floatDecimalFormat=
new DecimalFormat(floatDecimal);
DecimalFormat doubleDecimalFormat=
new DecimalFormat(doubleDecimal);
private HSSFWorkbook workbook =
null;
public PoiExcelExport(String fileDir,String sheetName){
this.fileDir =
fileDir;
this.sheetName =
sheetName;
workbook =
new HSSFWorkbook();
}
public PoiExcelExport(HttpServletResponse response,String fileName,String sheetName){
this.response =
response;
this.sheetName =
sheetName;
workbook =
new HSSFWorkbook();
}
/**
* 设置表头字体.
* @param titleFontType
*/
public void setTitleFontType(String titleFontType) {
this.titleFontType =
titleFontType;
}
/**
* 设置表头背景色.
* @param titleBackColor 十六进制
*/
public void setTitleBackColor(String titleBackColor) {
this.titleBackColor =
titleBackColor;
}
/**
* 设置表头字体大小.
* @param titleFontSize
*/
public void setTitleFontSize(
short titleFontSize) {
this.titleFontSize =
titleFontSize;
}
/**
* 设置表头自动筛选栏位,如A:AC.
* @param address
*/
public void setAddress(String address) {
this.address =
address;
}
/**
* 设置正文字体.
* @param contentFontType
*/
public void setContentFontType(String contentFontType) {
this.contentFontType =
contentFontType;
}
/**
* 设置正文字号.
* @param contentFontSize
*/
public void setContentFontSize(
short contentFontSize) {
this.contentFontSize =
contentFontSize;
}
/**
* 设置float类型数据小数位 默认.00
* @param doubleDecimal 如 ".00"
*/
public void setDoubleDecimal(String doubleDecimal) {
this.doubleDecimal =
doubleDecimal;
}
/**
* 设置doubel类型数据小数位 默认.00
* @param floatDecimalFormat 如 ".00
*/
public void setFloatDecimalFormat(DecimalFormat floatDecimalFormat) {
this.floatDecimalFormat =
floatDecimalFormat;
}
/**
* 设置列的公式
* @param colFormula 存储i-1列的公式 涉及到的行号使用@替换 如A@+B@
*/
public void setColFormula(String[] colFormula) {
this.colFormula =
colFormula;
}
/**
* 写excel.
* @param titleColumn 对应bean的属性名
* @param titleName excel要导出的表名
* @param titleSize 列宽
* @param dataList 数据
*/
public void wirteExcel(String titleColumn[],String titleName[],
int titleSize[],List<?>
dataList){
//添加Worksheet（不添加sheet时生成的xls文件打开时会报错)
Sheet sheet = workbook.createSheet(
this.sheetName);
//新建文件
OutputStream out =
null;
try {
if(fileDir!=
null){
//有文件路径
out =
new FileOutputStream(fileDir);
}else{
//否则，直接写到输出流中
out =
response.getOutputStream();
fileName = fileName+".xls"
;
response.setContentType("application/x-msdownload"
);
response.setHeader("Content-Disposition", "attachment; filename="
+ URLEncoder.encode(fileName, "UTF-8"
));
}
//写入excel的表头
Row titleNameRow = workbook.getSheet(sheetName).createRow(0
);
//设置样式
HSSFCellStyle titleStyle =
workbook.createCellStyle();
titleStyle = (HSSFCellStyle) setFontAndBorder(titleStyle, titleFontType, (
short) titleFontSize);
titleStyle = (HSSFCellStyle) setColor(titleStyle, titleBackColor, (
short)10
);
for(
int i = 0;i < titleName.length;i++
){
sheet.setColumnWidth(i, titleSize[i]*256);
//设置宽度
Cell cell =
titleNameRow.createCell(i);
cell.setCellStyle(titleStyle);
cell.setCellValue(titleName[i].toString());
}
//为表头添加自动筛选
if(!""
.equals(address)){
CellRangeAddress c =
(CellRangeAddress) CellRangeAddress.valueOf(address);
sheet.setAutoFilter(c);
}
//通过反射获取数据并写入到excel中
if(dataList!=
null&&dataList.size()>0
){
titleStyle = (HSSFCellStyle) setFontAndBorder(titleStyle, contentFontType, (
short) contentFontSize);
if(titleColumn.length>0
){
for(
int rowIndex = 1;rowIndex<=dataList.size();rowIndex++
){
Object obj = dataList.get(rowIndex-1);
//获得该对象
Class clsss = obj.getClass();
//获得该对对象的class实例
Row dataRow =
workbook.getSheet(sheetName).createRow(rowIndex);
for(
int columnIndex = 0;columnIndex<titleColumn.length;columnIndex++
){
String title =
titleColumn[columnIndex].toString().trim();
if(!"".equals(title)){
//字段不为空
//使首字母大写
String UTitle = Character.toUpperCase(title.charAt(0))+ title.substring(1, title.length());
// 使其首字母大写;
String methodName = "get"+
UTitle;
// 设置要执行的方法
Method method =
clsss.getDeclaredMethod(methodName);
//获取返回类型
String returnType =
method.getReturnType().getName();
String data = method.invoke(obj)==
null?""
:method.invoke(obj).toString();
Cell cell =
dataRow.createCell(columnIndex);
if(data!=
null&&!""
.equals(data)){
if("int"
.equals(returnType)){
cell.setCellValue(Integer.parseInt(data));
}else if("long"
.equals(returnType)){
cell.setCellValue(Long.parseLong(data));
}else if("float"
.equals(returnType)){
cell.setCellValue(floatDecimalFormat.format(Float.parseFloat(data)));
}else if("double"
.equals(returnType)){
cell.setCellValue(doubleDecimalFormat.format(Double.parseDouble(data)));
}else{
cell.setCellValue(data);
}
}
}else{
//字段为空 检查该列是否是公式
if(colFormula!=
null){
String sixBuf = colFormula[columnIndex].replace("@", (rowIndex+1)+""
);
Cell cell =
dataRow.createCell(columnIndex);
cell.setCellFormula(sixBuf.toString());
}
}
}
}
}
}
workbook.write(out);
} catch (Exception e) {
e.printStackTrace();
} finally {
try {
out.close();
} catch (IOException e) {
e.printStackTrace();
}
}
}
/**
* 将16进制的颜色代码写入样式中来设置颜色
* @param style 保证style统一
* @param color 颜色：66FFDD
* @param index 索引 8-64 使用时不可重复
* @return
*/
public CellStyle setColor(CellStyle style,String color,
short index){
if(color!=""&&color!=
null){
//转为RGB码
int r = Integer.parseInt((color.substring(0,2)),16);
//转为16进制
int g = Integer.parseInt((color.substring(2,4)),16
);
int b = Integer.parseInt((color.substring(4,6)),16
);
//自定义cell颜色
HSSFPalette palette =
workbook.getCustomPalette();
palette.setColorAtIndex((short)index, (
byte) r, (
byte) g, (
byte) b);
style.setFillPattern(CellStyle.SOLID_FOREGROUND);
style.setFillForegroundColor(index);
}
return style;
}
/**
* 设置字体并加外边框
* @param style 样式
* @param style 字体名
* @param style 大小
* @return
*/
public CellStyle setFontAndBorder(CellStyle style,String fontName,
short size){
HSSFFont font =
workbook.createFont();
font.setFontHeightInPoints(size);
font.setFontName(fontName);
font.setBold(true);
style.setFont(font);
style.setBorderBottom(CellStyle.BORDER_THIN); //下边框
style.setBorderLeft(CellStyle.BORDER_THIN);
//左边框
style.setBorderTop(CellStyle.BORDER_THIN);
//上边框
style.setBorderRight(CellStyle.BORDER_THIN);
//右边框
return style;
}
/**
* 删除文件
* @param fileDir
* @return
*/
public boolean deleteExcel(){
boolean flag =
false;
File file =
new File(
this.fileDir);
// 判断目录或文件是否存在
if (!file.exists()) {
// 不存在返回 false
return flag;
} else {
// 判断是否为文件
if (file.isFile()) {
// 为文件时调用删除文件方法
file.delete();
flag =
true;
}
}
return flag;
}
/**
* 删除文件
* @param fileDir
* @return
*/
public boolean deleteExcel(String path){
boolean flag =
false;
File file =
new File(path);
// 判断目录或文件是否存在
if (!file.exists()) {
// 不存在返回 false
return flag;
} else {
// 判断是否为文件
if (file.isFile()) {
// 为文件时调用删除文件方法
file.delete();
flag =
true;
}
}
return flag;
}
}
转载于:https://www.cnblogs.com/lambertwe/p/5730679.html
相关资源：Java利用poi导出excel表格.zip
