引包:
<!--excel表格處理-->
<dependency>
<groupId>org.apache.poi</groupId>
<artifactId>poi</artifactId>
<version>3.14</version>
</dependency>
<dependency>
<groupId>org.apache.poi</groupId>
<artifactId>poi-ooxml</artifactId>
<version>3.14</version>
</dependency>
<dependency>
<groupId>org.apache.poi</groupId>
<artifactId>poi-ooxml-schemas</artifactId>
<version>3.14</version>
</dependency>
import org.apache.poi.hssf.usermodel.HSSFCell;
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.openxml4j.exceptions.InvalidFormatException;
import org.apache.poi.ss.usermodel.Cell;
import org.apache.poi.ss.usermodel.Row;
import org.apache.poi.ss.usermodel.Sheet;
import org.apache.poi.xssf.usermodel.XSSFCell;
import org.apache.poi.xssf.usermodel.XSSFRow;
import org.apache.poi.xssf.usermodel.XSSFSheet;
import org.apache.poi.xssf.usermodel.XSSFWorkbook;
import java.io.IOException;
import java.io.InputStream;
import java.util.ArrayList;
import java.util.List;
public class ExcelUtil {
/**
* 1.先用InputStream獲取excel文件的io流
* 2.然後穿件一個內存中的excel文件HSSFWorkbook類型對象,這個對象表示了整個excel文件。
* 3.對這個excel文件的每頁做循環處理
* 4.對每頁中每行做循環處理
* 5.對每行中的每個單元格做處理,獲取這個單元格的值
* 6.把這行的結果添加到一個List數組中
* 7.把每行的結果添加到最後的總結果中
* 8.解析完以後就獲取了一個List<List<String>>類型的對象了
* @Title: readXls
* @Description: 處理xls文件
*/
public static List<List<String>> Exceljiexii(InputStream inputStream) throws IOException, InvalidFormatException {
XSSFWorkbook xss = new XSSFWorkbook(inputStream);
List<List<String>> result = new ArrayList<List<String>>();
HSSFWorkbook hssfWorkbook = new HSSFWorkbook(inputStream);
int size = hssfWorkbook.getNumberOfSheets();
// 循環每一頁,並處理當前循環頁
for (int numSheet = 0; numSheet < size; numSheet++) {
// HSSFSheet 標識某一頁
HSSFSheet hssfSheet = hssfWorkbook.getSheetAt(numSheet);
if (hssfSheet == null) {
continue;
}
// 處理當前頁,循環讀取每一行
for (int rowNum = 1; rowNum <= hssfSheet.getLastRowNum(); rowNum++) {
// HSSFRow表示行
HSSFRow hssfRow = hssfSheet.getRow(rowNum);
int minColIx = hssfRow.getFirstCellNum();
int maxColIx = hssfRow.getLastCellNum();
List<String> rowList = new ArrayList<String>();
// 遍歷改行,獲取處理每個cell元素
for (int colIx = minColIx; colIx < maxColIx; colIx++) {
// HSSFCell 表示單元格
HSSFCell cell = hssfRow.getCell(colIx);
if (cell == null) {
continue;
}
rowList.add(getStringVal(cell));
}
result.add(rowList);
}
}
return result;
}
/**
* @param @param path
* @param @return
* @param @throws Exception 設定文件
* @return List<List<String>> 返回類型
* @Title: readXlsx
* @Description: 處理Xlsx文件
*/
public static List<List<String>> readXlsx(InputStream inputStream) throws Exception {
XSSFWorkbook xssfWorkbook = new XSSFWorkbook(inputStream);
List<List<String>> result = new ArrayList<List<String>>();
// 循環每一頁,並處理當前循環頁
for (Sheet xssfSheet : xssfWorkbook) {
if (xssfSheet == null) {
continue;
}
// 處理當前頁,循環讀取每一行
for (int rowNum = 1; rowNum <= xssfSheet.getLastRowNum(); rowNum++) {
Row xssfRow = xssfSheet.getRow(rowNum);
int minColIx = xssfRow.getFirstCellNum();
int maxColIx = xssfRow.getLastCellNum();
List<String> rowList = new ArrayList<String>();
for (int colIx = minColIx; colIx < maxColIx; colIx++) {
Cell cell = xssfRow.getCell(colIx);
if (cell == null) {
continue;
}
rowList.add(cell.toString());
}
result.add(rowList);
}
}
return result;
}
/**
* 改造poi默認的toString()方法如下
* @param @param cell
* @param @return 設定文件
* @return String 返回類型
* @throws
* @Title: getStringVal
* @Description: 1.對於不熟悉的類型,或者爲空則返回""控制串
* 2.如果是數字,則修改單元格類型爲String,然後返回String,這樣就保證數字不被格式化了
*/
public static String getStringVal(HSSFCell cell) {
switch (cell.getCellType()) {
case Cell.CELL_TYPE_BOOLEAN:
return cell.getBooleanCellValue() ? "TRUE" : "FALSE";
case Cell.CELL_TYPE_FORMULA:
return cell.getCellFormula();
case Cell.CELL_TYPE_NUMERIC:
cell.setCellType(Cell.CELL_TYPE_STRING);
return cell.getStringCellValue();
case Cell.CELL_TYPE_STRING:
return cell.getStringCellValue();
default:
return "";
}
}
/**
* excel生成
* @param excel
* @return
*/
public static XSSFWorkbook excel(List<List<String>> excel) {
//創建excel工作簿
XSSFWorkbook workbook = new XSSFWorkbook();
//創建工作表sheet
XSSFSheet sheet = workbook.createSheet();
//寫入數據
for (int i = 0; i < excel.size(); i++) {
//列
XSSFRow nrow = sheet.createRow(i);
//行
for (int u=0;u<excel.get(i).size();u++){
XSSFCell ncell = nrow.createCell(u);
ncell.setCellValue(excel.get(i).get(u));
}
}
return workbook;
}
}
excel表格的工具類,直接上,不說話。