java解析导入excel表格转为实体类javabean
自制一个小工具，excel的表头为属性名，下面为对应的属性值，只需要填需要set的属性，不一定是每一个属性都写上。然后导入，后台java将其转换成java对象list的工具；代码复制即可用。调用handelExcel方法传入，excle名称，mutifile文件，和实体类Class，即可返回对象实体类的list。
excel：
实体类：
util工具类：
package com.srf.Utils;
import org.apache.poi.hssf.usermodel.*;
import org.apache.poi.poifs.filesystem.POIFSFileSystem;
import org.apache.poi.ss.usermodel.*;
import org.apache.poi.xssf.usermodel.XSSFWorkbook;
import org.springframework.web.multipart.MultipartFile;
import java.beans.PropertyDescriptor;
import java.io.*;
import java.lang.reflect.Field;
import java.lang.reflect.Method;
import java.text.DecimalFormat;
import java.text.SimpleDateFormat;
import java.util.ArrayList;
import java.util.Arrays;
import java.util.Date;
import java.util.List;
public class ExcelUitl {
/**
* 导入Excel转为实体类
* @param fileName
* @param file
* @param t
* @return
* @throws Exception
*/
public static List handelExcel(String fileName,MultipartFile file,Class t)throws Exception{
if (!fileName.matches("^.+\\.(?i)(xls)$") && !fileName.matches("^.+\\.(?i)(xlsx)$")) {
throw new Exception();
}
boolean isExcel2003 = true;
if (fileName.matches("^.+\\.(?i)(xlsx)$")) {
isExcel2003 = false;
}
InputStream is = file.getInputStream();
Workbook wb = null;
if (isExcel2003) {
wb = new HSSFWorkbook(is);
} else {
wb = new XSSFWorkbook(is);
}
Sheet sheet = wb.getSheetAt(0);
//获取表头列
Row row = sheet.getRow(0);
//表头字段放入titleList中
List titleList = new ArrayList();
for (int i = 0; i < row.getLastCellNum(); i++){
titleList.add(row.getCell(i).getStringCellValue());
}
//获得该类的所有属性
Field[] fields = t.getDeclaredFields();
List list = new ArrayList();
for (int r = 1; r <= sheet.getLastRowNum(); r++){
T tIns = t.newInstance();
boolean nullrow=false;
for(Field field:fields){
PropertyDescriptor pd = new PropertyDescriptor(field.getName(),t);
if (!"id".equals(field.getName())) {
int num = titleList.indexOf(field.getName());
if(num != -1) {
//获得set方法
Method method = pd.getWriteMethod();
System.out.println(num);
System.out.println(r);
Row nowrow = sheet.getRow(r);
if (nowrow !=null){
Cell cell = nowrow.getCell(num);
if (cell != null) {
cell.setCellType(CellType.STRING);
method.invoke(tIns, cell.getStringCellValue());
} else {
method.invoke(tIns, "");
}
} else {
nullrow=true;
break;
}
}
}
}
if (nullrow == true){
break;
}
list.add(tIns);
}
return list;
}
/**
* 读取Excel的内容，第一维数组存储的是一行中格列的值，二维数组存储的是多少个行
*
* @param file
* 读取数据的源Excel
* @param ignoreRows
* 读取数据忽略的行数，比喻行头不需要读入 忽略的行数为1
* @return 读出的Excel中数据的内容
* @throws FileNotFoundException
* @throws IOException
*/
public static String[][] getData(File file, int ignoreRows)
throws FileNotFoundException, IOException {
List result = new ArrayList();
int rowSize = 0;
BufferedInputStream in = new BufferedInputStream(new FileInputStream(
file));
// 打开HSSFWorkbook
POIFSFileSystem fs = new POIFSFileSystem(in);
HSSFWorkbook wb = new HSSFWorkbook(fs);
HSSFCell cell = null;
for (int sheetIndex = 0; sheetIndex < wb.getNumberOfSheets(); sheetIndex++) {
HSSFSheet st = wb.getSheetAt(sheetIndex);
// 第一行为标题，不取
for (int rowIndex = ignoreRows; rowIndex <= st.getLastRowNum(); rowIndex++) {
HSSFRow row = st.getRow(rowIndex);
if (row == null) {
continue;
}
int tempRowSize = row.getLastCellNum() + 1;
if (tempRowSize > rowSize) {
rowSize = tempRowSize;
}
String[] values = new String[rowSize];
Arrays.fill(values, "");
boolean hasValue = false;
for (short columnIndex = 0; columnIndex <= row.getLastCellNum(); columnIndex++) {
String value = "";
cell = row.getCell(columnIndex);
if (cell != null) {
// 注意：一定要设成这个，否则可能会出现乱码
// cell.setEncoding(HSSFCell.ENCODING_UTF_16);
switch (cell.getCellType()) {
case STRING:
value = cell.getStringCellValue();
break;
case NUMERIC:
if (HSSFDateUtil.isCellDateFormatted(cell)) {
Date date = cell.getDateCellValue();
if (date != null) {
value = new SimpleDateFormat("yyyy-MM-dd")
.format(date);
} else {
value = "";
}
} else {
value = new DecimalFormat("0").format(cell
.getNumericCellValue());
}
break;
case FORMULA:
// 导入时如果为公式生成的数据则无值
if (!cell.getStringCellValue().equals("")) {
value = cell.getStringCellValue();
} else {
value = cell.getNumericCellValue() + "";
}
break;
case BLANK:
break;
case ERROR:
value = "";
break;
case BOOLEAN:
value = (cell.getBooleanCellValue() == true ? "Y"
: "N");
break;
default:
value = "";
}
}
if (columnIndex == 0 && value.trim().equals("")) {
break;
}
values[columnIndex] = rightTrim(value);
hasValue = true;
}
if (hasValue) {
result.add(values);
}
}
}
in.close();
String[][] returnArray = new String[result.size()][rowSize];
for (int i = 0; i < returnArray.length; i++) {
returnArray[i] = (String[]) result.get(i);
}
return returnArray;
}
/**
* 去掉字符串右边的空格
*
* @param str
* 要处理的字符串
* @return 处理后的字符串
*/
public static String rightTrim(String str) {
if (str == null) {
return "";
}
int length = str.length();
for (int i = length - 1; i >= 0; i--) {
if (str.charAt(i) != 0x20) {
break;
}
length--;
}
return str.substring(0, length);
}
}