本文目录一览：
java如何读取整个excel文件的内容
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;
import org.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;
public class ExcelOperate {
public static void 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
* @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<String[]> result = new ArrayList<String[]>();
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 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
* @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);
}
}
java如何读取整个excel文件的内容？
在java程序添加spire.xls.jar依赖
import com.spire.xls.*;
public class ReadExcel {
public static void main(String[] args) {
// 创建Workbook对象
Workbook wb = new Workbook();
// 加载一个Excel文档
wb.loadFromFile("C:\\Users\\Administrator\\Desktop\\test.xlsx");
// 获取第一个工作表
Worksheet sheet = wb.getWorksheets().get(0);
// 遍历工作表的每一行
for (int i = 1; i <= sheet.getLastRow() + 1; i++) {
// 遍历工作的每一列
for (int j = 1; j <= sheet.getLastColumn() + 1; j++) {
// 输出指定单元格的数据
System.out.print(sheet.get(i,j).getText());
System.out.print("\t");
}
System.out.print("\n");
}
}
}
用java代码实现读取Excel中每个sheet页的内容，并且要与其他的Excel中某一列的值进行
/**
* p标题：readExcel/p
* p描述：读取Excel文件数据/p
* @param excelfilePath Excel文件路径
* @param startRow 开始行
* @param startCol 开始列
* @return List<ArrayList<String>>
* @throws IOException
* @throws BiffException
*/
public List<Map<String, Object>> readExcel(String excelfilePath, int startRow, int startCol)
throws IOException, BiffException {
// 读取xls文件
InputStream ins = new FileInputStream(excelfilePath);
// 设置读文件编码
WorkbookSettings setEncode = new WorkbookSettings();
setEncode.setEncoding("UTF-8");
Workbook rwb = Workbook.getWorkbook(ins, setEncode);
List<Map<String, Object>> alldata = new ArrayList<Map<String, Object>>();
Map<String, Object> data = null;
alldata.clear();
// 获得当前Excel表共有几个sheet
Sheet[] sheets = rwb.getSheets();
// 获得表数
int pages = sheets.length;
// 将excel表中的数据读取出来
// 在从Excel中读取数据的时候不需要知道每个sheet有几行，有那多少列
for (int i = 0; i < pages; i++) {
// 这里读取excel中每个sheet的数据，Sheet sheet = rwb.getSheet(i); 读取第二个sheet就是getSheet(1);
Sheet sheet = rwb.getSheet(i);
int cols = sheet.getColumns(); // 列
// 读取每一行对应的列数目
// 循环读取每一行的全部列数目的内容
int rows = sheet.getRows(); // 行
for (int r = startRow; r < rows; r++) {
data = new HashMap<String, Object>();
// 行循环,Excel的行列是从（0，0）开始
for (int c = startCol; c < cols; c++) {
Cell excelRows = sheet.getCell(c, r);
data.put("bgbh", excelRows.getContents());
}
alldata.add(data);
}
}
ins.close();
return alldata;
}
