Java读取Excel内容

借助于apathe的poi.jar，由于上传文件不支持.jar所以请下载后将文件改为.jar，在应用程序中添加poi.jar包，并将需要读取的excel文件放入根目录即可
本例使用java来读取excel的内容并展出出结果，代码如下：

import java.io.BufferedInputStream;import java.io.File;import java.io.FileInputStream;import java.io.FileNotFoundException;import java.io.IOException;import java.text.DecimalFormat;import java.text.SimpleDateFormat;import java.util.ArrayList;import java.util.Arrays;import java.util.Date;import java.util.List;import org.apache.poi.hssf.usermodel.HSSFCell;importorg.apache.poi.hssf.usermodel.HSSFDateUtil;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.poifs.filesystem.POIFSFileSystem;publicclass ExcelOperate {publicstaticvoid main(String[] args)throws Exception {File file = new File("ExcelDemo.xls");String[][] result = getData(file, 1);int rowLength = result.length;for(int i=0;i<rowLength;i++) {for(int j=0;j<result[i].length;j++) {System.out.print(result[i][j]+"\t\t");}System.out.println();}}/***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*@paramfile读取数据的源Excel*@paramignoreRows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*@throwsFileNotFoundException*@throwsIOException*/publicstatic String[][] getData(File file,int ignoreRows)throws FileNotFoundException, IOException {List<String[]> result = new ArrayList<String[]>();int rowSize = 0;BufferedInputStream in = new BufferedInputStream(new FileInputStream(file));// 打开HSSFWorkbookPOIFSFileSystem 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 HSSFCell.CELL_TYPE_STRING:value = cell.getStringCellValue();break;case HSSFCell.CELL_TYPE_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 HSSFCell.CELL_TYPE_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 HSSFCell.CELL_TYPE_BLANK:break;case HSSFCell.CELL_TYPE_ERROR:value = "";break;case HSSFCell.CELL_TYPE_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*@paramstr要处理的字符串*@return处理后的字符串*/publicstatic 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);}}