根据单元格的内容将新行插入 Apache POI 电子表格
Insert new rows into an Apache POI spreadsheet based on the content of a cell
注意：我到处都搜索过了，这不是一个重复的问题。
我正在尝试根据内容使用 Apache POI (poi-4.1.0) 和 Java 将固定数量的 "new" 行添加到电子表格中同一行中的单元格 - 请参见下图（“|”代表分栏符）：
1 富 | 1001、1002、1003 |是
2 酒吧 | 1010 |是
3 自我 | 2500、1500、5200 |是
基本上，我会在第 1 行和第 2 行之间插入两个新行，并在第 3 行之后再次插入，复制源行中的所有数据，除了没有三个值（或者有多个值可能是）在第二列中，只有一个 - 请参见下图（“|”代表分栏符）：
1 富 | 1001 |是
2 Foo1 | 1002 |是
3 Foo2 | 1003 |是
4 酒吧 | 1001 |是
5 自我 | 2500 |是
6 Slf1 | 1500 |是
7 Slf2 | 5200 |是
将重复此过程，仅在具有多个值的单元格上重复，直到读取并处理文件中的所有行。我应该注意，新行将附加在同一个文件中。
这是我的代码（我使用 this page 上的代码作为模板并尝试更新它以匹配我正在使用的 POI 的当前版本）：
public class XLSXFileAdd {
private static final String prpfile = "src/main/resources/fileinfo/directories.properties";
public static void main(String[] args) throws Exception{
File infile = new File(XLSXFileAdd.getCIFile()); //Gets the fully-qualified path to the input file.
XSSFWorkbook workbook = new XSSFWorkbook(new FileInputStream(infile));
XSSFSheet sheet = workbook.getSheet("Sheet1"); //Opens the XLSX document at the specified worksheet.
String msNum; //The string that will hold the contents of the cell with multiple values.
XLSXFileAdd xfa = new XLSXFileAdd();
for(int i = 1; i <= sheet.getLastRowNum(); i++){
Row row = sheet.getRow(i);
msNum = String.valueOf(row.getCell(2));
if(i == 2 && msNum.length() > 4){ //If the current column in the row is equal to the cell that could contain multiple values and the number of values in the cell are greater than 1 (length is greater than 4 for multiple values)
xfa.copyRows(workbook,sheet,i, i);
}else{
//Read and parse the file normally (the method used here works without issue so I have not copied it to reduce clutter and confusion).
}
}
}
private static String getCIFile(){
File propfile = new File(prpfile);
Properties properties = new Properties();
try{
FileInputStream fis = new FileInputStream(propfile);
properties.load(fis);
}catch(IOException ex){
Logger.getLogger(XLSXFileAdd.class.getName()).log(Level.SEVERE, null, ex);
}
String filename = (String)properties.get("xlsx.input.custdata");
return filename;
}
private void copyRows(XSSFWorkbook workbook,XSSFSheet worksheet,int sourceRowNum, int destinationRowNum){
//Get source & destination row
Row newRow = worksheet.getRow(destinationRowNum);
Row sourceRow = worksheet.getRow(sourceRowNum);
//Check if the row will be overwritten; if the row is populated, push down all rows by one and create a new row
if(newRow != null){
worksheet.shiftRows(destinationRowNum,worksheet.getLastRowNum(), 1);
}else{
newRow = worksheet.createRow(destinationRowNum);
}
//Loop through source columns to add to new row.
for(int i = 0; i < sourceRow.getLastCellNum(); i++){
Cell oldCell = sourceRow.getCell(i);
Cell newCell = newRow.createCell(i);
//If the old is not populated (null), jump to next cell
if(oldCell == null){
newCell = null;
continue;
}
//Set newly created cells to the style of the source cell
newCell.setCellStyle(oldCell.getCellStyle());
//Set the cell data type
newCell.setCellType(oldCell.getCellType());
//Set the value of the cell
switch(oldCell.getCellType()){
case _NONE:
newCell.setCellValue(oldCell.getStringCellValue());
break;
case BLANK:
break;
case BOOLEAN:
newCell.setCellValue(oldCell.getBooleanCellValue());
break;
case ERROR:
newCell.setCellErrorValue(oldCell.getErrorCellValue());
break;
case FORMULA:
newCell.setCellFormula(oldCell.getCellFormula());
break;
case NUMERIC:
newCell.setCellValue(oldCell.getNumericCellValue());
break;
case STRING:
newCell.setCellValue(oldCell.getRichStringCellValue());
break;
}
}
//Check for merged regions and copy said regions to new row.
for(int i = 0; i <worksheet.getNumMergedRegions(); i++){
CellRangeAddress cellRangeAddress = worksheet.getMergedRegion(i);
if(cellRangeAddress.getFirstRow() == sourceRow.getRowNum()){
CellRangeAddress newCellRangeAddress = new CellRangeAddress(newRow.getRowNum(),
(newRow.getRowNum()+(cellRangeAddress.getLastRow() - cellRangeAddress.getFirstRow()
)),cellRangeAddress.getFirstColumn(),cellRangeAddress.getLastColumn());
worksheet.addMergedRegion(newCellRangeAddress);
}
}
}
当我 运行 代码时，它 运行 正常并说它已成功完成，但是，当我尝试打开修改后的文件时，它抱怨数据损坏并删除了除两行之外的所有内容来自文件（如果我允许 MS Excel 尝试修复它）。我也试过将输出重定向到另一个文件，但结果是一样的——它破坏了数据，只显示两行，它们之间有一个空白行。
所以我的问题 is/are 这个：
1）有没有更好的方法来做我想做的事？
2）如果没有[更好的方法]，我做错了什么导致它破坏了我试图写入的所有数据。
所以我设法解决了我的问题。我没有尝试追加到源行下方，而是决定将该行追加到文件末尾，这使得逻辑更容易。这是我为解决问题而创建的代码：
public void addAddtlRows(Sheet sheet,Workbook workbook,DataFormatter formatter, ImportDataFormatter fmt, File file){
//Loads and parses the regular expression into memory and creates a new StringBuilder() instance.
final Pattern p = Pattern.compile(regex);
StringBuilder sb = new StringBuilder();
//Create the array which holds all the entries from a cell that contains multiple entries
String[] sysNumber;
//The number of the last row in the sheet.
int lastRow = sheet.getLastRowNum();
//Instantiates an integer that will be assigned the length of the array later
int arrayLength;
//Loops through the each row in the sheet
for(int r = 1; r < lastRow; r++){
Row row = sheet.getRow(r);
String cellData = formatter.formatCellValue(row.getCell(2));
String active = formatter.formatCellValue(row.getCell(4));
if((cellData.length() > 4) && (active.equals("Yes"))){
/** Checks whether or not we are on the cell containing the
* numbers and whether or not they are currently active.
* If we are, get values for all cells in the row
*/
String an = formatter.formatCellValue(row.getCell(0));
String cn = formatter.formatCellValue(row.getCell(1));
String ca = formatter.formatCellValue(row.getCell(3));
String es = formatter.formatCellValue(row.getCell(4));
String i10 = formatter.formatCellValue(row.getCell(5));
String i9 = formatter.formatCellValue(row.getCell(6));
String ia = formatter.formatCellValue(row.getCell(7));
String rp = formatter.formatCellValue(row.getCell(8));
/**
* Checks the contents of the cell for more than one entry
* If the cell contains more than one number, process
* the data accordingly
*/
fmt.setSysNum(cellData);
String[] sys = String.valueOf(fmt.getSysNum()).split(",");
/**
* Assign the length value of the 'sysNumber' array to
* the integer 'arrayLength'
*/
arrayLength = sys.length;
/**
* Loop through each entry in the string array, creating
* a new row on each iteration and pasting the data from
* the old cells to the new ones
*/
for(int n = 0; n < arrayLength; n++){
Row nRow = sheet.createRow(sheet.getPhysicalNumberOfRows());
nRow.createCell(0).setCellValue(an);
nRow.createCell(1).setCellValue(cn);
nRow.createCell(2).setCellValue(sys[n]);
nRow.createCell(3).setCellValue(ca);
nRow.createCell(4).setCellValue(es);
nRow.createCell(5).setCellValue(i10);
nRow.createCell(6).setCellValue(i9);
nRow.createCell(7).setCellValue(ia);
nRow.createCell(8).setCellValue(rp);
}
}
}
//Writes the newly added contents of the worksheet to the workbook.
try {
workbook.write(new FileOutputStream(file));
} catch (FileNotFoundException ex) {
Logger.getLogger(MapMultipleSNToDBFields.class.getName()).log(Level.SEVERE, null, ex);
} catch (IOException ex) {
Logger.getLogger(MapMultipleSNToDBFields.class.getName()).log(Level.SEVERE, null, ex);
}
}
注意：我到处都搜索过了，这不是一个重复的问题。
我正在尝试根据内容使用 Apache POI (poi-4.1.0) 和 Java 将固定数量的 "new" 行添加到电子表格中同一行中的单元格 - 请参见下图（“|”代表分栏符）：
1 富 | 1001、1002、1003 |是
2 酒吧 | 1010 |是
3 自我 | 2500、1500、5200 |是
基本上，我会在第 1 行和第 2 行之间插入两个新行，并在第 3 行之后再次插入，复制源行中的所有数据，除了没有三个值（或者有多个值可能是）在第二列中，只有一个 - 请参见下图（“|”代表分栏符）：
1 富 | 1001 |是
2 Foo1 | 1002 |是
3 Foo2 | 1003 |是
4 酒吧 | 1001 |是
5 自我 | 2500 |是
6 Slf1 | 1500 |是
7 Slf2 | 5200 |是
将重复此过程，仅在具有多个值的单元格上重复，直到读取并处理文件中的所有行。我应该注意，新行将附加在同一个文件中。
这是我的代码（我使用 this page 上的代码作为模板并尝试更新它以匹配我正在使用的 POI 的当前版本）：
public class XLSXFileAdd {
private static final String prpfile = "src/main/resources/fileinfo/directories.properties";
public static void main(String[] args) throws Exception{
File infile = new File(XLSXFileAdd.getCIFile()); //Gets the fully-qualified path to the input file.
XSSFWorkbook workbook = new XSSFWorkbook(new FileInputStream(infile));
XSSFSheet sheet = workbook.getSheet("Sheet1"); //Opens the XLSX document at the specified worksheet.
String msNum; //The string that will hold the contents of the cell with multiple values.
XLSXFileAdd xfa = new XLSXFileAdd();
for(int i = 1; i <= sheet.getLastRowNum(); i++){
Row row = sheet.getRow(i);
msNum = String.valueOf(row.getCell(2));
if(i == 2 && msNum.length() > 4){ //If the current column in the row is equal to the cell that could contain multiple values and the number of values in the cell are greater than 1 (length is greater than 4 for multiple values)
xfa.copyRows(workbook,sheet,i, i);
}else{
//Read and parse the file normally (the method used here works without issue so I have not copied it to reduce clutter and confusion).
}
}
}
private static String getCIFile(){
File propfile = new File(prpfile);
Properties properties = new Properties();
try{
FileInputStream fis = new FileInputStream(propfile);
properties.load(fis);
}catch(IOException ex){
Logger.getLogger(XLSXFileAdd.class.getName()).log(Level.SEVERE, null, ex);
}
String filename = (String)properties.get("xlsx.input.custdata");
return filename;
}
private void copyRows(XSSFWorkbook workbook,XSSFSheet worksheet,int sourceRowNum, int destinationRowNum){
//Get source & destination row
Row newRow = worksheet.getRow(destinationRowNum);
Row sourceRow = worksheet.getRow(sourceRowNum);
//Check if the row will be overwritten; if the row is populated, push down all rows by one and create a new row
if(newRow != null){
worksheet.shiftRows(destinationRowNum,worksheet.getLastRowNum(), 1);
}else{
newRow = worksheet.createRow(destinationRowNum);
}
//Loop through source columns to add to new row.
for(int i = 0; i < sourceRow.getLastCellNum(); i++){
Cell oldCell = sourceRow.getCell(i);
Cell newCell = newRow.createCell(i);
//If the old is not populated (null), jump to next cell
if(oldCell == null){
newCell = null;
continue;
}
//Set newly created cells to the style of the source cell
newCell.setCellStyle(oldCell.getCellStyle());
//Set the cell data type
newCell.setCellType(oldCell.getCellType());
//Set the value of the cell
switch(oldCell.getCellType()){
case _NONE:
newCell.setCellValue(oldCell.getStringCellValue());
break;
case BLANK:
break;
case BOOLEAN:
newCell.setCellValue(oldCell.getBooleanCellValue());
break;
case ERROR:
newCell.setCellErrorValue(oldCell.getErrorCellValue());
break;
case FORMULA:
newCell.setCellFormula(oldCell.getCellFormula());
break;
case NUMERIC:
newCell.setCellValue(oldCell.getNumericCellValue());
break;
case STRING:
newCell.setCellValue(oldCell.getRichStringCellValue());
break;
}
}
//Check for merged regions and copy said regions to new row.
for(int i = 0; i <worksheet.getNumMergedRegions(); i++){
CellRangeAddress cellRangeAddress = worksheet.getMergedRegion(i);
if(cellRangeAddress.getFirstRow() == sourceRow.getRowNum()){
CellRangeAddress newCellRangeAddress = new CellRangeAddress(newRow.getRowNum(),
(newRow.getRowNum()+(cellRangeAddress.getLastRow() - cellRangeAddress.getFirstRow()
)),cellRangeAddress.getFirstColumn(),cellRangeAddress.getLastColumn());
worksheet.addMergedRegion(newCellRangeAddress);
}
}
}
当我 运行 代码时，它 运行 正常并说它已成功完成，但是，当我尝试打开修改后的文件时，它抱怨数据损坏并删除了除两行之外的所有内容来自文件（如果我允许 MS Excel 尝试修复它）。我也试过将输出重定向到另一个文件，但结果是一样的——它破坏了数据，只显示两行，它们之间有一个空白行。
所以我的问题 is/are 这个： 1）有没有更好的方法来做我想做的事？ 2）如果没有[更好的方法]，我做错了什么导致它破坏了我试图写入的所有数据。
所以我设法解决了我的问题。我没有尝试追加到源行下方，而是决定将该行追加到文件末尾，这使得逻辑更容易。这是我为解决问题而创建的代码：
public void addAddtlRows(Sheet sheet,Workbook workbook,DataFormatter formatter, ImportDataFormatter fmt, File file){
//Loads and parses the regular expression into memory and creates a new StringBuilder() instance.
final Pattern p = Pattern.compile(regex);
StringBuilder sb = new StringBuilder();
//Create the array which holds all the entries from a cell that contains multiple entries
String[] sysNumber;
//The number of the last row in the sheet.
int lastRow = sheet.getLastRowNum();
//Instantiates an integer that will be assigned the length of the array later
int arrayLength;
//Loops through the each row in the sheet
for(int r = 1; r < lastRow; r++){
Row row = sheet.getRow(r);
String cellData = formatter.formatCellValue(row.getCell(2));
String active = formatter.formatCellValue(row.getCell(4));
if((cellData.length() > 4) && (active.equals("Yes"))){
/** Checks whether or not we are on the cell containing the
* numbers and whether or not they are currently active.
* If we are, get values for all cells in the row
*/
String an = formatter.formatCellValue(row.getCell(0));
String cn = formatter.formatCellValue(row.getCell(1));
String ca = formatter.formatCellValue(row.getCell(3));
String es = formatter.formatCellValue(row.getCell(4));
String i10 = formatter.formatCellValue(row.getCell(5));
String i9 = formatter.formatCellValue(row.getCell(6));
String ia = formatter.formatCellValue(row.getCell(7));
String rp = formatter.formatCellValue(row.getCell(8));
/**
* Checks the contents of the cell for more than one entry
* If the cell contains more than one number, process
* the data accordingly
*/
fmt.setSysNum(cellData);
String[] sys = String.valueOf(fmt.getSysNum()).split(",");
/**
* Assign the length value of the 'sysNumber' array to
* the integer 'arrayLength'
*/
arrayLength = sys.length;
/**
* Loop through each entry in the string array, creating
* a new row on each iteration and pasting the data from
* the old cells to the new ones
*/
for(int n = 0; n < arrayLength; n++){
Row nRow = sheet.createRow(sheet.getPhysicalNumberOfRows());
nRow.createCell(0).setCellValue(an);
nRow.createCell(1).setCellValue(cn);
nRow.createCell(2).setCellValue(sys[n]);
nRow.createCell(3).setCellValue(ca);
nRow.createCell(4).setCellValue(es);
nRow.createCell(5).setCellValue(i10);
nRow.createCell(6).setCellValue(i9);
nRow.createCell(7).setCellValue(ia);
nRow.createCell(8).setCellValue(rp);
}
}
}
//Writes the newly added contents of the worksheet to the workbook.
try {
workbook.write(new FileOutputStream(file));
} catch (FileNotFoundException ex) {
Logger.getLogger(MapMultipleSNToDBFields.class.getName()).log(Level.SEVERE, null, ex);
} catch (IOException ex) {
Logger.getLogger(MapMultipleSNToDBFields.class.getName()).log(Level.SEVERE, null, ex);
}
}