java專案中Excel檔案的匯入匯出
阿新 • • 發佈:2018-12-30
package poi.excel;
import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;
import java.lang.reflect.Field;
import java.lang.reflect.Method;
import java.util.ArrayList;
import java.util.List;
import javax.servlet.http.HttpServletRequest;
import org.apache.log4j.Logger;
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.HSSFColor;
import org.apache.poi.ss.usermodel.Cell;
import org.apache.poi.ss.usermodel.Row;
import org.apache.poi.ss.usermodel.Sheet;
import org.apache.poi.ss.usermodel.Workbook;
import org.apache.poi.xssf.usermodel.XSSFWorkbook;
/**
* @ClassName: ExcelUtil
* @Description: Excel匯入匯出工具類
* @author 周宣
* @date 2016-11-8 下午7:16:11
*
*/
public class ExcelUtil {
private static final Logger logger = Logger.getLogger(ExcelUtil.class);
/**
* @Title: createWorkbook
* @Description: 判斷excel檔案字尾名,生成不同的workbook
* @param @param is
* @param @param excelFileName
* @param @return
* @param @throws IOException
* @return Workbook
* @throws
*/
public Workbook createWorkbook(InputStream is,String excelFileName) throws IOException{
if (excelFileName.endsWith(".xls")) {
return new HSSFWorkbook(is);
}else if (excelFileName.endsWith(".xlsx")) {
return new XSSFWorkbook(is);
}
return null;
}
/**
* @Title: getSheet
* @Description: 根據sheet索引號獲取對應的sheet
* @param @param workbook
* @param @param sheetIndex
* @param @return
* @return Sheet
* @throws
*/
public Sheet getSheet(Workbook workbook,int sheetIndex){
return workbook.getSheetAt(0);
}
/**
* @Title: importDataFromExcel
* @Description: 將sheet中的資料儲存到list中,
* 1、呼叫此方法時,vo的屬性個數必須和excel檔案每行資料的列數相同且一一對應,vo的所有屬性都為String
* 2、在action呼叫此方法時,需宣告
* private File excelFile;上傳的檔案
* private String excelFileName;原始檔案的檔名
* 3、頁面的file控制元件name需對應File的檔名
* @param @param vo javaBean
* @param @param is 輸入流
* @param @param excelFileName
* @param @return
* @return List<Object>
* @throws
*/
public List<Object> importDataFromExcel(Object vo,InputStream is,String excelFileName){
List<Object> list = new ArrayList<Object>();
try {
//建立工作簿
Workbook workbook = this.createWorkbook(is, excelFileName);
//建立工作表sheet
Sheet sheet = this.getSheet(workbook, 0);
//獲取sheet中資料的行數
int rows = sheet.getPhysicalNumberOfRows();
//獲取表頭單元格個數
int cells = sheet.getRow(0).getPhysicalNumberOfCells();
//利用反射,給JavaBean的屬性進行賦值
Field[] fields = vo.getClass().getDeclaredFields();
for (int i = 1; i < rows; i++) {//第一行為標題欄,從第二行開始取資料
Row row = sheet.getRow(i);
int index = 0;
while (index < cells) {
Cell cell = row.getCell(index);
if (null == cell) {
cell = row.createCell(index);
}
cell.setCellType(Cell.CELL_TYPE_STRING);
String value = null == cell.getStringCellValue()?"":cell.getStringCellValue();
Field field = fields[index];
String fieldName = field.getName();
String methodName = "set"+fieldName.substring(0,1).toUpperCase()+fieldName.substring(1);
Method setMethod = vo.getClass().getMethod(methodName, new Class[]{String.class});
setMethod.invoke(vo, new Object[]{value});
index++;
}
if (isHasValues(vo)) {//判斷物件屬性是否有值
list.add(vo);
vo.getClass().getConstructor(new Class[]{}).newInstance(new Object[]{});//重新建立一個vo物件
}
}
} catch (Exception e) {
logger.error(e);
}finally{
try {
is.close();//關閉流
} catch (Exception e2) {
logger.error(e2);
}
}
return list;
}
/**
* @Title: isHasValues
* @Description: 判斷一個物件所有屬性是否有值,如果一個屬性有值(分空),則返回true
* @param @param object
* @param @return
* @return boolean
* @throws
*/
public boolean isHasValues(Object object){
Field[] fields = object.getClass().getDeclaredFields();
boolean flag = false;
for (int i = 0; i < fields.length; i++) {
String fieldName = fields[i].getName();
String methodName = "get"+fieldName.substring(0, 1).toUpperCase()+fieldName.substring(1);
Method getMethod;
try {
getMethod = object.getClass().getMethod(methodName);
Object obj = getMethod.invoke(object);
if (null != obj && "".equals(obj)) {
flag = true;
break;
}
} catch (Exception e) {
logger.error(e);
}
}
return flag;
}
public <T> void exportDataToExcel(List<T> list,String[] headers,String title,OutputStream os){
HSSFWorkbook workbook = new HSSFWorkbook();
//生成一個表格
HSSFSheet sheet = workbook.createSheet(title);
//設定表格預設列寬15個位元組
sheet.setDefaultColumnWidth(15);
//生成一個樣式
HSSFCellStyle style = this.getCellStyle(workbook);
//生成一個字型
HSSFFont font = this.getFont(workbook);
//把字型應用到當前樣式
style.setFont(font);
//生成表格標題
HSSFRow row = sheet.createRow(0);
row.setHeight((short)300);
HSSFCell cell = null;
for (int i = 0; i < headers.length; i++) {
cell = row.createCell(i);
cell.setCellStyle(style);
HSSFRichTextString text = new HSSFRichTextString(headers[i]);
cell.setCellValue(text);
}
//將資料放入sheet中
for (int i = 0; i < list.size(); i++) {
row = sheet.createRow(i+1);
T t = list.get(i);
//利用反射,根據JavaBean屬性的先後順序,動態呼叫get方法得到屬性的值
Field[] fields = t.getClass().getFields();
try {
for (int j = 0; j < fields.length; j++) {
cell = row.createCell(j);
Field field = fields[j];
String fieldName = field.getName();
String methodName = "get"+fieldName.substring(0, 1).toUpperCase()+fieldName.substring(1);
Method getMethod = t.getClass().getMethod(methodName,new Class[]{});
Object value = getMethod.invoke(t, new Object[]{});
if(null == value)
value ="";
cell.setCellValue(value.toString());
}
} catch (Exception e) {
logger.error(e);
}
}
try {
workbook.write(os);
} catch (Exception e) {
logger.error(e);
}finally{
try {
os.flush();
os.close();
} catch (IOException e) {
logger.error(e);
}
}
}
/**
* @Title: getCellStyle
* @Description: 獲取單元格格式
* @param @param workbook
* @param @return
* @return HSSFCellStyle
* @throws
*/
public HSSFCellStyle getCellStyle(HSSFWorkbook workbook){
HSSFCellStyle style = workbook.createCellStyle();
style.setFillForegroundColor(HSSFColor.GREY_25_PERCENT.index);
style.setFillPattern(HSSFCellStyle.SOLID_FOREGROUND);
style.setBorderBottom(HSSFCellStyle.BORDER_THIN);
style.setBorderTop(HSSFCellStyle.BORDER_THIN);
style.setLeftBorderColor(HSSFCellStyle.BORDER_THIN);
style.setRightBorderColor(HSSFCellStyle.BORDER_THIN);
style.setAlignment(HSSFCellStyle.ALIGN_CENTER);
return style;
}
/**
* @Title: getFont
* @Description: 生成字型樣式
* @param @param workbook
* @param @return
* @return HSSFFont
* @throws
*/
public HSSFFont getFont(HSSFWorkbook workbook){
HSSFFont font = workbook.createFont();
font.setColor(HSSFColor.WHITE.index);
font.setFontHeightInPoints((short)12);
font.setBoldweight(HSSFFont.BOLDWEIGHT_BOLD);
return font;
}
public boolean isIE(HttpServletRequest request){
return request.getHeader("USER-AGENT").toLowerCase().indexOf("msie")>0?true:false;
}
}
import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;
import java.lang.reflect.Field;
import java.lang.reflect.Method;
import java.util.ArrayList;
import java.util.List;
import javax.servlet.http.HttpServletRequest;
import org.apache.log4j.Logger;
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.HSSFColor;
import org.apache.poi.ss.usermodel.Cell;
import org.apache.poi.ss.usermodel.Row;
import org.apache.poi.ss.usermodel.Sheet;
import org.apache.poi.ss.usermodel.Workbook;
import org.apache.poi.xssf.usermodel.XSSFWorkbook;
/**
* @ClassName: ExcelUtil
* @Description: Excel匯入匯出工具類
* @author 周宣
* @date 2016-11-8 下午7:16:11
*
*/
public class ExcelUtil {
private static final Logger logger = Logger.getLogger(ExcelUtil.class);
/**
* @Title: createWorkbook
* @Description: 判斷excel檔案字尾名,生成不同的workbook
* @param @param is
* @param @param excelFileName
* @param @return
* @param @throws IOException
* @return Workbook
* @throws
*/
public Workbook createWorkbook(InputStream is,String excelFileName) throws IOException{
if (excelFileName.endsWith(".xls")) {
return new HSSFWorkbook(is);
}else if (excelFileName.endsWith(".xlsx")) {
return new XSSFWorkbook(is);
}
return null;
}
/**
* @Title: getSheet
* @Description: 根據sheet索引號獲取對應的sheet
* @param @param workbook
* @param @param sheetIndex
* @param @return
* @return Sheet
* @throws
*/
public Sheet getSheet(Workbook workbook,int sheetIndex){
return workbook.getSheetAt(0);
}
/**
* @Title: importDataFromExcel
* @Description: 將sheet中的資料儲存到list中,
* 1、呼叫此方法時,vo的屬性個數必須和excel檔案每行資料的列數相同且一一對應,vo的所有屬性都為String
* 2、在action呼叫此方法時,需宣告
* private File excelFile;上傳的檔案
* private String excelFileName;原始檔案的檔名
* 3、頁面的file控制元件name需對應File的檔名
* @param @param vo javaBean
* @param @param is 輸入流
* @param @param excelFileName
* @param @return
* @return List<Object>
* @throws
*/
public List<Object> importDataFromExcel(Object vo,InputStream is,String excelFileName){
List<Object> list = new ArrayList<Object>();
try {
//建立工作簿
Workbook workbook = this.createWorkbook(is, excelFileName);
//建立工作表sheet
Sheet sheet = this.getSheet(workbook, 0);
//獲取sheet中資料的行數
int rows = sheet.getPhysicalNumberOfRows();
//獲取表頭單元格個數
int cells = sheet.getRow(0).getPhysicalNumberOfCells();
//利用反射,給JavaBean的屬性進行賦值
Field[] fields = vo.getClass().getDeclaredFields();
for (int i = 1; i < rows; i++) {//第一行為標題欄,從第二行開始取資料
Row row = sheet.getRow(i);
int index = 0;
while (index < cells) {
Cell cell = row.getCell(index);
if (null == cell) {
cell = row.createCell(index);
}
cell.setCellType(Cell.CELL_TYPE_STRING);
String value = null == cell.getStringCellValue()?"":cell.getStringCellValue();
Field field = fields[index];
String fieldName = field.getName();
String methodName = "set"+fieldName.substring(0,1).toUpperCase()+fieldName.substring(1);
Method setMethod = vo.getClass().getMethod(methodName, new Class[]{String.class});
setMethod.invoke(vo, new Object[]{value});
index++;
}
if (isHasValues(vo)) {//判斷物件屬性是否有值
list.add(vo);
vo.getClass().getConstructor(new Class[]{}).newInstance(new Object[]{});//重新建立一個vo物件
}
}
} catch (Exception e) {
logger.error(e);
}finally{
try {
is.close();//關閉流
} catch (Exception e2) {
logger.error(e2);
}
}
return list;
}
/**
* @Title: isHasValues
* @Description: 判斷一個物件所有屬性是否有值,如果一個屬性有值(分空),則返回true
* @param @param object
* @param @return
* @return boolean
* @throws
*/
public boolean isHasValues(Object object){
Field[] fields = object.getClass().getDeclaredFields();
boolean flag = false;
for (int i = 0; i < fields.length; i++) {
String fieldName = fields[i].getName();
String methodName = "get"+fieldName.substring(0, 1).toUpperCase()+fieldName.substring(1);
Method getMethod;
try {
getMethod = object.getClass().getMethod(methodName);
Object obj = getMethod.invoke(object);
if (null != obj && "".equals(obj)) {
flag = true;
break;
}
} catch (Exception e) {
logger.error(e);
}
}
return flag;
}
public <T> void exportDataToExcel(List<T> list,String[] headers,String title,OutputStream os){
HSSFWorkbook workbook = new HSSFWorkbook();
//生成一個表格
HSSFSheet sheet = workbook.createSheet(title);
//設定表格預設列寬15個位元組
sheet.setDefaultColumnWidth(15);
//生成一個樣式
HSSFCellStyle style = this.getCellStyle(workbook);
//生成一個字型
HSSFFont font = this.getFont(workbook);
//把字型應用到當前樣式
style.setFont(font);
//生成表格標題
HSSFRow row = sheet.createRow(0);
row.setHeight((short)300);
HSSFCell cell = null;
for (int i = 0; i < headers.length; i++) {
cell = row.createCell(i);
cell.setCellStyle(style);
HSSFRichTextString text = new HSSFRichTextString(headers[i]);
cell.setCellValue(text);
}
//將資料放入sheet中
for (int i = 0; i < list.size(); i++) {
row = sheet.createRow(i+1);
T t = list.get(i);
//利用反射,根據JavaBean屬性的先後順序,動態呼叫get方法得到屬性的值
Field[] fields = t.getClass().getFields();
try {
for (int j = 0; j < fields.length; j++) {
cell = row.createCell(j);
Field field = fields[j];
String fieldName = field.getName();
String methodName = "get"+fieldName.substring(0, 1).toUpperCase()+fieldName.substring(1);
Method getMethod = t.getClass().getMethod(methodName,new Class[]{});
Object value = getMethod.invoke(t, new Object[]{});
if(null == value)
value ="";
cell.setCellValue(value.toString());
}
} catch (Exception e) {
logger.error(e);
}
}
try {
workbook.write(os);
} catch (Exception e) {
logger.error(e);
}finally{
try {
os.flush();
os.close();
} catch (IOException e) {
logger.error(e);
}
}
}
/**
* @Title: getCellStyle
* @Description: 獲取單元格格式
* @param @param workbook
* @param @return
* @return HSSFCellStyle
* @throws
*/
public HSSFCellStyle getCellStyle(HSSFWorkbook workbook){
HSSFCellStyle style = workbook.createCellStyle();
style.setFillForegroundColor(HSSFColor.GREY_25_PERCENT.index);
style.setFillPattern(HSSFCellStyle.SOLID_FOREGROUND);
style.setBorderBottom(HSSFCellStyle.BORDER_THIN);
style.setBorderTop(HSSFCellStyle.BORDER_THIN);
style.setLeftBorderColor(HSSFCellStyle.BORDER_THIN);
style.setRightBorderColor(HSSFCellStyle.BORDER_THIN);
style.setAlignment(HSSFCellStyle.ALIGN_CENTER);
return style;
}
/**
* @Title: getFont
* @Description: 生成字型樣式
* @param @param workbook
* @param @return
* @return HSSFFont
* @throws
*/
public HSSFFont getFont(HSSFWorkbook workbook){
HSSFFont font = workbook.createFont();
font.setColor(HSSFColor.WHITE.index);
font.setFontHeightInPoints((short)12);
font.setBoldweight(HSSFFont.BOLDWEIGHT_BOLD);
return font;
}
public boolean isIE(HttpServletRequest request){
return request.getHeader("USER-AGENT").toLowerCase().indexOf("msie")>0?true:false;
}
}