Java读取excel文件的内容包含合并单元格
需要读取的excel格式如下图
Java实现方式：
1.在pom中添加依赖
<dependency>
<groupId>org.apache.poi</groupId>
<artifactId>poi</artifactId>
<version>3.15</version>
</dependency>
<dependency>
<groupId>org.apache.poi</groupId>
<artifactId>poi-ooxml</artifactId>
<version>3.15</version>
</dependency>
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2.使用Excel工具类
import org.apache.poi.ss.usermodel.*;
import org.apache.poi.ss.util.CellRangeAddress;
import java.util.ArrayList;
import java.util.List;
public class ReadExcelUtil {
/**
* 获取单元格的值
* @param cell
* @return
*/
public static String getCellValue(Cell cell){
if(cell == null) return "";
if(cell.getCellType() == Cell.CELL_TYPE_STRING){
return cell.getStringCellValue();
}else if(cell.getCellType() == Cell.CELL_TYPE_BOOLEAN){
return String.valueOf(cell.getBooleanCellValue());
}else if(cell.getCellType() == Cell.CELL_TYPE_FORMULA){
return cell.getCellFormula() ;
}else if(cell.getCellType() == Cell.CELL_TYPE_NUMERIC){
return String.valueOf(cell.getNumericCellValue());
}
return "";
}
/**
* 合并单元格处理,获取合并行
* @param sheet
* @return List<CellRangeAddress>
*/
public static List<CellRangeAddress> getCombineCell(Sheet sheet)
{
List<CellRangeAddress> list = new ArrayList<CellRangeAddress>();
//获得一个 sheet 中合并单元格的数量
int sheetmergerCount = sheet.getNumMergedRegions();
//遍历所有的合并单元格
for(int i = 0; i<sheetmergerCount;i++)
{
//获得合并单元格保存进list中
CellRangeAddress ca = sheet.getMergedRegion(i);
list.add(ca);
}
return list;
}
public static int getRowNum(List<CellRangeAddress> listCombineCell,Cell cell,Sheet sheet){
int xr = 0;
int firstC = 0;
int lastC = 0;
int firstR = 0;
int lastR = 0;
for(CellRangeAddress ca:listCombineCell)
{
//获得合并单元格的起始行, 结束行, 起始列, 结束列
firstC = ca.getFirstColumn();
lastC = ca.getLastColumn();
firstR = ca.getFirstRow();
lastR = ca.getLastRow();
if(cell.getRowIndex() >= firstR && cell.getRowIndex() <= lastR)
{
if(cell.getColumnIndex() >= firstC && cell.getColumnIndex() <= lastC)
{
xr = lastR;
}
}
}
return xr;
}
/**
* 判断单元格是否为合并单元格，是的话则将单元格的值返回
* @param listCombineCell 存放合并单元格的list
* @param cell 需要判断的单元格
* @param sheet sheet
* @return
*/
public String isCombineCell(List<CellRangeAddress> listCombineCell, Cell cell, Sheet sheet)
throws Exception{
int firstC = 0;
int lastC = 0;
int firstR = 0;
int lastR = 0;
String cellValue = null;
for(CellRangeAddress ca:listCombineCell)
{
//获得合并单元格的起始行, 结束行, 起始列, 结束列
firstC = ca.getFirstColumn();
lastC = ca.getLastColumn();
firstR = ca.getFirstRow();
lastR = ca.getLastRow();
if(cell.getRowIndex() >= firstR && cell.getRowIndex() <= lastR)
{
if(cell.getColumnIndex() >= firstC && cell.getColumnIndex() <= lastC)
{
Row fRow = sheet.getRow(firstR);
Cell fCell = fRow.getCell(firstC);
cellValue = getCellValue(fCell);
break;
}
}
else
{
cellValue = "";
}
}
return cellValue;
}
/**
* 获取合并单元格的值
* @param sheet
* @param row
* @param column
* @return
*/
public String getMergedRegionValue(Sheet sheet ,int row , int column){
int sheetMergeCount = sheet.getNumMergedRegions();
for(int i = 0 ; i < sheetMergeCount ; i++){
CellRangeAddress ca = sheet.getMergedRegion(i);
int firstColumn = ca.getFirstColumn();
int lastColumn = ca.getLastColumn();
int firstRow = ca.getFirstRow();
int lastRow = ca.getLastRow();
if(row >= firstRow && row <= lastRow){
if(column >= firstColumn && column <= lastColumn){
Row fRow = sheet.getRow(firstRow);
Cell fCell = fRow.getCell(firstColumn);
return getCellValue(fCell) ;
}
}
}
return null ;
}
/**
* 判断指定的单元格是否是合并单元格
* @param sheet
* @param row 行下标
* @param column 列下标
* @return
*/
public static boolean isMergedRegion(Sheet sheet,int row ,int column) {
int sheetMergeCount = sheet.getNumMergedRegions();
for (int i = 0; i < sheetMergeCount; i++) {
CellRangeAddress range = sheet.getMergedRegion(i);
int firstColumn = range.getFirstColumn();
int lastColumn = range.getLastColumn();
int firstRow = range.getFirstRow();
int lastRow = range.getLastRow();
if(row >= firstRow && row <= lastRow){
if(column >= firstColumn && column <= lastColumn){
return true;
}
}
}
return false;
}
}
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3.编写读取excel的类
import com.apply.ism.entity.TSystem;
import org.apache.poi.hssf.usermodel.HSSFWorkbook;
import org.apache.poi.ss.usermodel.*;
import org.apache.poi.ss.util.CellRangeAddress;
import org.apache.poi.xssf.usermodel.XSSFWorkbook;
import java.io.File;
import java.io.FileInputStream;
import java.io.InputStream;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
public class TestReadExcel {
public static void main(String[] args) throws Exception {
File file=new File("C:\\Users\\Administrator\\Desktop\\测试.xlsx");
InputStream is = new FileInputStream(file);
addReportByExcel(is,"测试.xlsx");
}
public static String addReportByExcel(InputStream inputStream,String fileName)
throws Exception{
String message = "Import success";
boolean isE2007 = false; //判断是否是excel2007格式
if(fileName.endsWith("xlsx")){
isE2007 = true;
}
int rowIndex = 0;
int columnIndex = 0;
try {
InputStream input = inputStream; //建立输入流
Workbook wb = null;
//根据文件格式(2003或者2007)来初始化
if(isE2007){
wb = new XSSFWorkbook(input);
}else{
wb = new HSSFWorkbook(input);
}
Sheet sheet = wb.getSheetAt(0); //获得第一个表单
List<CellRangeAddress> cras = ReadExcelUtil.getCombineCell(sheet);
int count = sheet.getLastRowNum()+1;//总行数
List<TSystem> irs = new ArrayList<>();
Map<String,List<TSystem>> datas = new HashMap<>();
String sysName = ReadExcelUtil.getCellValue(sheet.getRow(0).getCell(0));
String category = ReadExcelUtil.getCellValue(sheet.getRow(1).getCell(0));
List<TSystem> items = new ArrayList<>();
List<TSystem> objs = new ArrayList<>();
TSystem obj = new TSystem();
obj.setSysName(sysName);
obj.setCategory(category);
objs.add(obj);
for(int i = 3; i < count;i++){
rowIndex = i;
Row row = sheet.getRow(i);
TSystem ir = new TSystem();
String projectName = ReadExcelUtil.getCellValue(row.getCell(0)).replaceAll("\n","");
ir.setProjectName(projectName);
ir.setSysName(sysName);
ir.setCategory(category);
if(ReadExcelUtil.isMergedRegion(sheet,i,0)){
int lastRow = ReadExcelUtil.getRowNum(cras,sheet.getRow(i).getCell(0),sheet);
for(;i<=lastRow;i++){
row = sheet.getRow(i);
TSystem item = new TSystem();
item.setProjectName(projectName);
item.setSysName(sysName);
item.setCategory(category);
item.setStandard(ReadExcelUtil.getCellValue(row.getCell(1)).replaceAll("\n",""));
item.setContents(ReadExcelUtil.getCellValue(row.getCell(2)).replaceAll("\n",""));
item.setScoreStandard(ReadExcelUtil.getCellValue(row.getCell(3)).replaceAll("\n",""));
item.setFraction(ReadExcelUtil.getCellValue(row.getCell(4)));
items.add(item);
}
i--;
}else{
row = sheet.getRow(i);
TSystem item = new TSystem();
item.setProjectName(projectName);
item.setSysName(sysName);
item.setCategory(category);
item.setStandard(ReadExcelUtil.getCellValue(row.getCell(1)));
item.setContents(ReadExcelUtil.getCellValue(row.getCell(2)));
item.setScoreStandard(ReadExcelUtil.getCellValue(row.getCell(3)));
item.setFraction(ReadExcelUtil.getCellValue(row.getCell(4)));
items.add(item);
}
irs.add(ir);
}
datas.put("project",irs);
datas.put("item",items);
datas.put("objs",objs);
System.out.println(datas.toString());
/*JSONArray js= new JSONArray();
js.addAll(irs);
System.out.println(js.toJSONString());*/
} catch (Exception ex) {
//xr.setMessage("Import failed, please check the data in "+rowIndex+" rows "+columnIndex+" columns ");
message = "Import failed, please check the data in "+rowIndex+" rows ";
}
return message;
}
}
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