qt 如何合并两个文本文件多列数据
时间: 2023-09-10 10:07:15 浏览: 71
您可以使用Qt提供的QFile和QTextStream类来读取和合并文本文件数据。以下是一个简单的示例代码:
```C++
QString originalFilePath = "path/to/first/file";
QString appendFilePath = "path/to/second/file";
QString outputPath = "path/to/output/file";
QFile originalFile(originalFilePath);
QFile appendFile(appendFilePath);
QFile outputFile(outputPath);
if (originalFile.open(QIODevice::ReadOnly | QIODevice::Text)
&& appendFile.open(QIODevice::ReadOnly | QIODevice::Text)
&& outputFile.open(QIODevice::WriteOnly | QIODevice::Text)) {
QTextStream originalFileStream(&originalFile);
QTextStream appendFileStream(&appendFile);
QTextStream outputFileStream(&outputFile);
QString originalLine, appendLine;
QStringList originalColumns, appendColumns, mergedColumns;
// Read and merge the header row(s)
originalLine = originalFileStream.readLine();
appendLine = appendFileStream.readLine();
originalColumns = originalLine.split("\t");
appendColumns = appendLine.split("\t");
mergedColumns.append(originalColumns);
mergedColumns.append(appendColumns.mid(originalColumns.size()));
// Write the merged header row to the output file
QString mergedLine = mergedColumns.join("\t");
outputFileStream << mergedLine << "\n";
// Read and merge the data rows
while (!originalFileStream.atEnd() && !appendFileStream.atEnd()) {
originalLine = originalFileStream.readLine();
appendLine = appendFileStream.readLine();
originalColumns = originalLine.split("\t");
appendColumns = appendLine.split("\t");
mergedColumns.clear();
mergedColumns.append(originalColumns);
mergedColumns.append(appendColumns.mid(originalColumns.size()));
// Write the merged data row to the output file
mergedLine = mergedColumns.join("\t");
outputFileStream << mergedLine << "\n";
}
// Close the files
originalFile.close();
appendFile.close();
outputFile.close();
}
```
此代码将原始文件和追加文件的数据合并到一个新文件中,该新文件位于指定的输出路径中。每个文件都被假定为以制表符分隔的多列数据,第一行是标头行。此代码合并原始文件和追加文件的标头行,并使用相同的列顺序和名称将其数据合并。如果您需要不同的规则来合并标头或数据,可以按需修改该代码。