1.PoiExportsUtil类
package com.*.*.util;
import com.*.core.annotation.IsNeeded;
import org.apache.commons.lang.StringUtils;
import org.apache.poi.hssf.usermodel.*;
import org.apache.poi.hssf.util.HSSFColor;
import org.apache.poi.xssf.usermodel.*;
import javax.imageio.ImageIO;
import javax.servlet.http.HttpServletResponse;
import java.awt.image.BufferedImage;
import java.io.*;
import java.lang.reflect.Field;
import java.lang.reflect.Method;
import java.text.SimpleDateFormat;
import java.util.*;
import java.util.regex.Matcher;
import java.util.regex.Pattern;
/**
* 导出excel工具类
*
*/
public class PoiExportsUtil<T> {
// 2007 版本以上 最大支持1048576行
private final static String EXCEl_FILE_2007 = "2007";
// 2003 版本 最大支持65536 行
private final static String EXCEL_FILE_2003 = "2003";
/*// 要导出的报表名
private String fileName = "申请护照表";*/
public PoiExportsUtil() {}
/**
* <p>
* 导出无头部标题行Excel <br>
* 时间格式默认:yyyy-MM-dd hh:mm:ss <br>
* </p>
*
* @param title 表格标题
* @param dataset 数据集合
* @param response 浏览器响应
* @param version 2003 或者 2007,不传时默认生成2003版本
*/
public void exportExcel(String title, List<T> dataset, HttpServletResponse response, String version) throws IOException {
if(StringUtils.isBlank(version) || EXCEl_FILE_2007.equals(version.trim())){
exportExcel2007(title, dataset, response, "yyyy-MM-dd");
}else{
exportExcel2003(title, dataset, response, "yyyy-MM-dd");
}
}
/**
* @param title 表格标题名
* @param dataset 需要显示的数据集合,集合中一定要放置符合JavaBean风格的类的对象。此方法支持的
* JavaBean属性的数据类型有基本数据类型及String,Date
* @param pattern 如果有时间数据,设定输出格式。默认为"yyyy-MM-dd hh:mm:ss"
*/
@SuppressWarnings({"unchecked", "rawtypes"})
private void exportExcel2007(String title, List<T> dataset, HttpServletResponse response, String pattern) throws IOException {
// 声明一个工作薄
XSSFWorkbook workbook = new XSSFWorkbook();
// 生成一个表格
XSSFSheet sheet = workbook.createSheet(title);
// 设置表格默认列宽度为20个字节
sheet.setDefaultColumnWidth(20);
// 生成一个样式
XSSFCellStyle style = workbook.createCellStyle();
// 设置这些样式
style.setFillForegroundColor(new XSSFColor(java.awt.Color.gray));
style.setFillPattern(XSSFCellStyle.SOLID_FOREGROUND);
style.setBorderBottom(XSSFCellStyle.BORDER_THIN);
style.setBorderLeft(XSSFCellStyle.BORDER_THIN);
style.setBorderRight(XSSFCellStyle.BORDER_THIN);
style.setBorderTop(XSSFCellStyle.BORDER_THIN);
style.setAlignment(XSSFCellStyle.ALIGN_CENTER);
// 生成一个字体
XSSFFont font = workbook.createFont();
font.setBoldweight(XSSFFont.BOLDWEIGHT_BOLD);
font.setFontName("宋体");
font.setColor(new XSSFColor(java.awt.Color.BLACK));
font.setFontHeightInPoints((short) 11);
// 把字体应用到当前的样式
style.setFont(font);
// 生成并设置另一个样式
XSSFCellStyle style2 = workbook.createCellStyle();
style2.setFillForegroundColor(new XSSFColor(java.awt.Color.WHITE));
style2.setFillPattern(XSSFCellStyle.SOLID_FOREGROUND);
style2.setBorderBottom(XSSFCellStyle.BORDER_THIN);
style2.setBorderLeft(XSSFCellStyle.BORDER_THIN);
style2.setBorderRight(XSSFCellStyle.BORDER_THIN);
style2.setBorderTop(XSSFCellStyle.BORDER_THIN);
style2.setAlignment(XSSFCellStyle.ALIGN_CENTER);
style2.setVerticalAlignment(XSSFCellStyle.VERTICAL_CENTER);
// 生成另一个字体
XSSFFont font2 = workbook.createFont();
font2.setBoldweight(XSSFFont.BOLDWEIGHT_NORMAL);
// 把字体应用到当前的样式
style2.setFont(font2);
if (dataset == null || dataset.size() == 0) {
return;
}
//取当前时间为字符串 (20180628)
SimpleDateFormat sdf1 = new SimpleDateFormat( " yyyyMMdd " );
String curTime = sdf1.format(new Date());
//设置response头信息
response.reset();
response.setContentType("application/vnd.ms-excel");
response.setHeader("Content-Disposition","attachment; filename=" + java.net.URLEncoder.encode(title, "UTF-8")+".xlsx");
// response.setHeader("Content-Disposition", "attachment; filename=" + fileName + ".xlsx");
OutputStream out = response.getOutputStream();
T tempT = dataset.get(0);
Field[] fields = tempT.getClass().getDeclaredFields();
List<String> fileList = getFiledList(fields);
List<Field> filedTypes = getFiledType(fields);
// 产生表格标题行
XSSFRow row = sheet.createRow(0);
XSSFCell cellHeader;
for (int i = 0; i < fileList.size(); i++) {
cellHeader = row.createCell(i);
cellHeader.setCellStyle(style);
XSSFRichTextString text = new XSSFRichTextString(fileList.get(i));
cellHeader.setCellValue(text);
}
// 遍历集合数据,产生数据行
Iterator<T> it = dataset.iterator();
int index = 0;
Pattern p = Pattern.compile("^//d+(//.//d+)?$");
XSSFCell cell;
SimpleDateFormat sdf = new SimpleDateFormat(pattern);
while (it.hasNext()) {
index++;
row = sheet.createRow(index);
T t = it.next();
// 利用反射,根据JavaBean属性的先后顺序,动态调用getXxx()方法得到属性值
for (int i = 0; i < filedTypes.size(); i++) {
cell = row.createCell(i);
cell.setCellStyle(style2);
Field field = filedTypes.get(i);
String fieldName = field.getName();
String getMethodName = "get" + fieldName.substring(0, 1).toUpperCase()
+ fieldName.substring(1);
try {
Class tCls = t.getClass();
Method getMethod = tCls.getMethod(getMethodName);
Object value = getMethod.invoke(t);
// 判断值的类型后进行强制类型转换
String textValue = null;
if (value instanceof Integer) {
cell.setCellValue((Integer) value);
} else if (value instanceof Float) {
textValue = String.valueOf(value);
cell.setCellValue(textValue);
} else if (value instanceof Double) {
textValue = String.valueOf(value);
cell.setCellValue(textValue);
} else if (value instanceof Long) {
cell.setCellValue((Long) value);
}
if (value instanceof Boolean) {
textValue = "是";
if (!(Boolean) value) {
textValue = "否";
}
} else if (value instanceof Date) {
textValue = sdf.format((Date) value);
} else {
// 其它数据类型都当作字符串简单处理
if (value != null) {
textValue = value.toString();
}
}
if (textValue != null) {
Matcher matcher = p.matcher(textValue);
if (matcher.matches()) {
// 是数字当作double处理
cell.setCellValue(Double.parseDouble(textValue));
} else {
XSSFRichTextString richString = new XSSFRichTextString(textValue);
cell.setCellValue(richString);
}
}
} catch (Exception e) {
e.printStackTrace();
}
}
}
try {
workbook.write(out);
out.flush();
} catch (IOException e) {
e.printStackTrace();
} finally {
out.close();
}
}
/**
* @param title 表格标题名
* @param dataset 需要显示的数据集合,集合中一定要放置符合JavaBean风格的类的对象。此方法支持的
* JavaBean属性的数据类型有基本数据类型及String,Date
* @param pattern 如果有时间数据,设定输出格式。默认为"yyyy-MM-dd hh:mm:ss"
*/
@SuppressWarnings({"unchecked", "rawtypes"})
private void exportExcel2003(String title, List<T> dataset, HttpServletResponse response, String pattern) throws IOException {
// 声明一个工作薄
HSSFWorkbook workbook = new HSSFWorkbook();
// 生成一个表格
HSSFSheet sheet = workbook.createSheet(title);
// 设置表格默认列宽度为20个字节
sheet.setDefaultColumnWidth((short) 20);
// 生成一个样式并设置样式
HSSFCellStyle style = workbook.createCellStyle();
style.setFillForegroundColor(HSSFColor.GREY_50_PERCENT.index);
style.setFillPattern(HSSFCellStyle.SOLID_FOREGROUND);
style.setBorderBottom(HSSFCellStyle.BORDER_THIN);
style.setBorderLeft(HSSFCellStyle.BORDER_THIN);
style.setBorderRight(HSSFCellStyle.BORDER_THIN);
style.setBorderTop(HSSFCellStyle.BORDER_THIN);
style.setAlignment(HSSFCellStyle.ALIGN_CENTER);
// 生成一个字体并设置字体
HSSFFont font = workbook.createFont();
font.setBoldweight(HSSFFont.BOLDWEIGHT_BOLD);
font.setFontName("宋体");
font.setColor(HSSFColor.WHITE.index);
font.setFontHeightInPoints((short) 11);
// 把字体应用到当前的样式
style.setFont(font);
// 生成并设置另一个样式
HSSFCellStyle style2 = workbook.createCellStyle();
style2.setFillForegroundColor(HSSFColor.WHITE.index);
style2.setFillPattern(HSSFCellStyle.SOLID_FOREGROUND);
style2.setBorderBottom(HSSFCellStyle.BORDER_THIN);
style2.setBorderLeft(HSSFCellStyle.BORDER_THIN);
style2.setBorderRight(HSSFCellStyle.BORDER_THIN);
style2.setBorderTop(HSSFCellStyle.BORDER_THIN);
style2.setAlignment(HSSFCellStyle.ALIGN_CENTER);
style2.setVerticalAlignment(HSSFCellStyle.VERTICAL_CENTER);
// 生成另一个字体
HSSFFont font2 = workbook.createFont();
font2.setBoldweight(HSSFFont.BOLDWEIGHT_NORMAL);
// 把字体应用到当前的样式
style2.setFont(font2);
// 遍历集合数据,产生数据行
Iterator<T> it = dataset.iterator();
int index = 0;
Pattern p = Pattern.compile("^//d+(//.//d+)?$");
HSSFCell cell;
SimpleDateFormat sdf = new SimpleDateFormat(pattern);
if (dataset.size() == 0) {
return;
}
//设置response头信息
response.reset();
response.setContentType("application/vnd.ms-excel");
response.setHeader("Content-Disposition", "attachment; filename=" + java.net.URLEncoder.encode(title, "UTF-8") + ".xls");
OutputStream out = response.getOutputStream();
T tempT = dataset.get(0);
Field[] fields = tempT.getClass().getDeclaredFields();
List<String> fileList = getFiledList(fields);
List<Field> filedTypes = getFiledType(fields);
// 产生表格标题行
HSSFRow row = sheet.createRow(0);
HSSFCell cellHeader;
for (int i = 0; i < fileList.size(); i++) {
cellHeader = row.createCell(i);
cellHeader.setCellStyle(style);
HSSFRichTextString text = new HSSFRichTextString(fileList.get(i));
cellHeader.setCellValue(text);
}
try {while (it.hasNext()) {
index++;
row = sheet.createRow(index);
row.setHeightInPoints(120);
T t = it.next();
// 利用反射,根据JavaBean属性的先后顺序,动态调用getXxx()方法得到属性值
for (int i = 0; i < filedTypes.size(); i++) {
cell = row.createCell(i);
cell.setCellStyle(style2);
Field field = filedTypes.get(i);
String fieldName = field.getName();
String getMethodName = "get" + fieldName.substring(0, 1).toUpperCase()
+ fieldName.substring(1);
Class tCls = t.getClass();
Method getMethod = tCls.getMethod(getMethodName);
Object value = getMethod.invoke(t);
if(i == filedTypes.size()-1){
if(value!=null){
FileOutputStream fileOut = null;
String path = value.toString();
BufferedImage bufferImg = null;//图片
String picType=path.substring(path.lastIndexOf(".")+1);
// 先把读进来的图片放到一个ByteArrayOutputStream中,以便产生ByteArray
ByteArrayOutputStream byteArrayOut = new ByteArrayOutputStream();
//将图片读到BufferedImage
bufferImg = ImageIO.read(new File(path));
// 将图片写入流中
ImageIO.write(bufferImg, picType, byteArrayOut);
// 利用HSSFPatriarch将图片写入EXCEL
HSSFPatriarch patriarch = sheet.createDrawingPatriarch();
//图片导出到单元格中
HSSFClientAnchor anchor = new HSSFClientAnchor(0, 0, 0, 0, (short) 8, index, (short) 9 , index+1);
// 插入图片
patriarch.createPicture(anchor, workbook.addPicture(byteArrayOut.toByteArray(), HSSFWorkbook.PICTURE_TYPE_JPEG));
}
}else {
// 判断值的类型后进行强制类型转换
String textValue = null;
if (value instanceof Integer) {
cell.setCellValue((Integer) value);
} else if (value instanceof Float) {
textValue = String.valueOf(value);
cell.setCellValue(textValue);
} else if (value instanceof Double) {
textValue = String.valueOf(value);
cell.setCellValue(textValue);
} else if (value instanceof Long) {
cell.setCellValue((Long) value);
}
if (value instanceof Boolean) {
textValue = "是";
if (!(Boolean) value) {
textValue = "否";
}
} else if (value instanceof Date) {
textValue = sdf.format((Date) value);
} else {
// 其它数据类型都当作字符串简单处理
if (value != null) {
textValue = value.toString();
}
}
if (textValue != null) {
Matcher matcher = p.matcher(textValue);
if (matcher.matches()) {
// 是数字当作double处理
cell.setCellValue(Double.parseDouble(textValue));
} else {
HSSFRichTextString richString = new HSSFRichTextString(textValue);
cell.setCellValue(richString);
}
}
}
}
}
workbook.write(out);
} catch (Exception e) {
e.printStackTrace();
} finally {
out.close();
}
}
//==========================本类私有方法=========================//
/**
* 获取参与操作的实体类字段
*/
private List<String> getFiledList(Field[] fields) {
List<String> fileList = new ArrayList<>();
//获取字段注解的表头
for (Field field1 : fields) {
if (field1.isAnnotationPresent(IsNeeded.class)){
IsNeeded isNeeded = (IsNeeded) field1.getAnnotations()[0];
String head = isNeeded.head();
fileList.add(head);
}
}
return fileList;
}
private List<Field> getFiledType(Field[] fields) {
List<Field> fileTypes = new ArrayList<>();
//获取字段注解的表头
for (Field field1 : fields) {
if (field1.isAnnotationPresent(IsNeeded.class)){
fileTypes.add(field1);
}
}
return fileTypes;
}
}
2.IsNeed.java
package com.*.core.annotation;
import java.lang.annotation.*;
/**
* 是否需要从解析excel赋值
* 因为再实体类里面并不是所有的属性都要参与excel的导入,给需要参与导入的属性加上此注解
*
*/
@Documented
@Retention(value = RetentionPolicy.RUNTIME)
@Target(value = {ElementType.METHOD, ElementType.FIELD,ElementType.PARAMETER,ElementType.TYPE})
public @interface IsNeeded {
/**
* 是否需要从解析excel赋值
* @return
* true:需要 false:不需要
*/
boolean isNeeded() default true;
String head() default "";
}
3.实体类,加入注解
@IsNeeded(head = "手机号")
@ApiModelProperty(value = "手机号")
@TableField("phone")
private String phone;
4.controller类
PoiExportsUtil<T> poiExportsUtil = new PoiExportsUtil();
poiExportsUtil.exportExcel(sheetName,list,resp,"2003");//2003版本