Java 解析Excel（xls、xlsx两种格式）

一、环境

JDK 1.8

二、JAR

mons-collections4-4.1.jar

2.poi-3.9-1203.jar

3.poi-examples-3.9-1203.jar

4.poi-excelant-3.9-1203.jar

5.poi-ooxml-3.9-1203.jar

6.poi-ooxml-schemas-3.9-1203.jar

7.poi-scratchpad-3.9-1203.jar

8.xmlbeans-2.3.0.jar

注意：jar版本为3.9

三、主要API

1.import org.apache.poi.ss.usermodel.Workbook,对应Excel文档；

2.import org.apache.poi.hssf.usermodel.HSSFWorkbook，对应xls格式的Excel文档；

3.import org.apache.poi.xssf.usermodel.XSSFWorkbook，对应xlsx格式的Excel文档；

4.import org.apache.poi.ss.usermodel.Sheet，对应Excel文档中的一个sheet；

5.import org.apache.poi.ss.usermodel.Row，对应一个sheet中的一行；

6.import org.apache.poi.ss.usermodel.Cell，对应一个单元格。

四、示例

package poi;import java.io.FileInputStream;import java.io.FileNotFoundException;import java.io.IOException;import java.io.InputStream;import java.util.ArrayList;import java.util.LinkedHashMap;import java.util.List;import java.util.Map;import java.util.Map.Entry;import org.apache.poi.hssf.usermodel.HSSFWorkbook;import org.apache.poi.ss.usermodel.Cell;import org.apache.poi.ss.usermodel.DateUtil;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;public class Testpoi {public static void main(String[] args) {Workbook wb =null;Sheet sheet = null;Row row = null;List<Map<String,String>> list = null;String cellData = null;String filePath = "D:\\test.xlsx";String columns[] = {"name","age","score"};wb = readExcel(filePath);if(wb != null){//用来存放表中数据list = new ArrayList<Map<String,String>>();//获取第一个sheetsheet = wb.getSheetAt(0);//获取最大行数int rownum = sheet.getPhysicalNumberOfRows();//获取第一行row = sheet.getRow(0);//获取最大列数int colnum = row.getPhysicalNumberOfCells();for (int i = 1; i<rownum; i++) {Map<String,String> map = new LinkedHashMap<String,String>();row = sheet.getRow(i);if(row !=null){for (int j=0;j<colnum;j++){cellData = (String) getCellFormatValue(row.getCell(j));map.put(columns[j], cellData);}}else{break;}list.add(map);}}//遍历解析出来的listfor (Map<String,String> map : list) {for (Entry<String,String> entry : map.entrySet()) {System.out.print(entry.getKey()+":"+entry.getValue()+",");}System.out.println();}}//读取excelpublic static Workbook readExcel(String filePath){Workbook wb = null;if(filePath==null){return null;}String extString = filePath.substring(filePath.lastIndexOf("."));InputStream is = null;try {is = new FileInputStream(filePath);if(".xls".equals(extString)){return wb = new HSSFWorkbook(is);}else if(".xlsx".equals(extString)){return wb = new XSSFWorkbook(is);}else{return wb = null;}} catch (FileNotFoundException e) {e.printStackTrace();} catch (IOException e) {e.printStackTrace();}return wb;}public static Object getCellFormatValue(Cell cell){Object cellValue = null;if(cell!=null){//判断cell类型switch(cell.getCellType()){case Cell.CELL_TYPE_NUMERIC:{cellValue = String.valueOf(cell.getNumericCellValue());break;}case Cell.CELL_TYPE_FORMULA:{//判断cell是否为日期格式if(DateUtil.isCellDateFormatted(cell)){//转换为日期格式YYYY-mm-ddcellValue = cell.getDateCellValue();}else{//数字cellValue = String.valueOf(cell.getNumericCellValue());}break;}case Cell.CELL_TYPE_STRING:{cellValue = cell.getRichStringCellValue().getString();break;}default:cellValue = "";}}else{cellValue = "";}return cellValue;}}