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Java 解析Excel(xls、xlsx兩種格式)

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Java 解析Excel(xls、xlsx兩種格式)

一、環境

  JDK 1.8

二、JAR

  1.commons-collections4-4.1.jar

  2.poi-3.9-20121203.jar

  3.poi-examples-3.9-20121203.jar

  4.poi-excelant-3.9-20121203.jar

  5.poi-ooxml-3.9-20121203.jar

  6.poi-ooxml-schemas-3.9-20121203.jar

  7.poi-scratchpad-3.9-20121203.jar

  8.xmlbeans-2.3.0.jar

  註意:jar版本為3.9

三、主要API

  1.import org.apache.poi.ss.usermodel.Workbook,對應Excel文檔;

  2.import org.apache.poi.hssf.usermodel.HSSFWorkbook,對應xls格式的Excel文檔;

  3.import org.apache.poi.xssf.usermodel.XSSFWorkbook,對應xlsx格式的Excel文檔;

  4.import org.apache.poi.ss.usermodel.Sheet,對應Excel文檔中的一個sheet;

  5.import org.apache.poi.ss.usermodel.Row,對應一個sheet中的一行;

  6.import org.apache.poi.ss.usermodel.Cell,對應一個單元格。

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){ //用來存放表中數據 list = new ArrayList<Map<String,String>>(); //獲取第一個sheet sheet = wb.getSheetAt(0); //獲取最大行數 int rownum = sheet.getPhysicalNumberOfRows(); //獲取第一行 row = sheet.getRow(0); //獲取最大列數 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); } } //遍歷解析出來的list for (Map<String,String> map : list) { for (Entry<String,String> entry : map.entrySet()) { System.out.print(entry.getKey()+":"+entry.getValue()+","); } System.out.println(); } } //讀取excel public 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){ //判斷cell類型 switch(cell.getCellType()){ case Cell.CELL_TYPE_NUMERIC:{ cellValue = String.valueOf(cell.getNumericCellValue()); break; } case Cell.CELL_TYPE_FORMULA:{ //判斷cell是否為日期格式 if(DateUtil.isCellDateFormatted(cell)){ //轉換為日期格式YYYY-mm-dd cellValue = cell.getDateCellValue(); }else{ //數字 cellValue = String.valueOf(cell.getNumericCellValue()); } break; } case Cell.CELL_TYPE_STRING:{ cellValue = cell.getRichStringCellValue().getString(); break; } default: cellValue = ""; } }else{ cellValue = ""; } return cellValue; } }

Java 解析Excel(xls、xlsx兩種格式)