1、須要導入的jarjava
1.commons-collections4-4.1.jarapache
2.poi-3.17-beta1.jarxss
3.poi-ooxml-3.17-beta1.jarspa
4.poi-ooxml-schemas-3.17-beta1.jar3d
5.xmlbeans-2.6.0.jarexcel
2、主要APIcode
1.import org.apache.poi.ss.usermodel.Workbook,對應Excel文檔;orm
2.import org.apache.poi.hssf.usermodel.HSSFWorkbook,對應xls格式的Excel文檔;xml
3.import org.apache.poi.xssf.usermodel.XSSFWorkbook,對應xlsx格式的Excel文檔;blog
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。
3、代碼以下
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是否爲日期格式 if(DateUtil.isCellDateFormatted(cell)){ //轉換爲日期格式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; } }
4、運行結果
代碼運行前保證在D盤下有一個test.xlsx文檔,否則報文件找不到異常;Excel文檔中的表頭要和代碼中的String columns[] = {"name","age","score"}對應起來。