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@@ -31,4 +31,8 @@ public class AppInfo { | |
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| private String appName; | ||
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| private int cpuNum; | ||
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| private long mem; | ||
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| } | ||
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93 changes: 93 additions & 0 deletions
93
jcommon/excel/src/main/java/run/mone/excel/CsvExcelConverter.java
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| @@ -0,0 +1,93 @@ | ||
| package run.mone.excel; | ||
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| import org.apache.commons.csv.CSVFormat; | ||
| import org.apache.commons.csv.CSVParser; | ||
| import org.apache.commons.csv.CSVPrinter; | ||
| import org.apache.commons.csv.CSVRecord; | ||
| import org.apache.poi.openxml4j.exceptions.InvalidFormatException; | ||
| import org.apache.poi.ss.usermodel.*; | ||
| import org.apache.poi.xssf.usermodel.XSSFWorkbook; | ||
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| import java.io.*; | ||
| import java.nio.file.Files; | ||
| import java.nio.file.Paths; | ||
| import java.util.ArrayList; | ||
| import java.util.List; | ||
| import java.util.Map; | ||
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| /** | ||
| * @author wmin | ||
| * @date 2024/1/8 | ||
| */ | ||
| public class CsvExcelConverter { | ||
| //csv转excel | ||
| public static void convertCsvToExcel(String csvFilePath, String excelFilePath) throws IOException { | ||
| try ( | ||
| InputStream csvInputStream = new FileInputStream(csvFilePath); | ||
| BufferedReader bufferedReader = new BufferedReader(new InputStreamReader(csvInputStream)); | ||
| Workbook workbook = new XSSFWorkbook(); | ||
| FileOutputStream excelOutputStream = new FileOutputStream(excelFilePath) | ||
| ) { | ||
| String line; | ||
| Sheet sheet = workbook.createSheet("Sheet1"); | ||
| int rowNumber = 0; | ||
| while ((line = bufferedReader.readLine()) != null) { | ||
| String[] values = line.split(","); | ||
| Row row = sheet.createRow(rowNumber++); | ||
| for (int i = 0; i < values.length; i++) { | ||
| row.createCell(i).setCellValue(values[i]); | ||
| } | ||
| } | ||
| workbook.write(excelOutputStream); | ||
| } | ||
| } | ||
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| //excel转csv | ||
| public static void convertExcelToCsv(String excelFilePath, String csvFilePath) throws IOException, InvalidFormatException { | ||
| try (Workbook workbook = WorkbookFactory.create(new File(excelFilePath)); | ||
| CSVPrinter csvPrinter = new CSVPrinter(new FileWriter(csvFilePath), CSVFormat.DEFAULT)) { | ||
| Sheet sheet = workbook.getSheetAt(0); | ||
| for (Row row : sheet) { | ||
| List<String> csvValues = new ArrayList<>(); | ||
| row.forEach(cell -> { | ||
| String text = new DataFormatter().formatCellValue(cell); | ||
| csvValues.add(text); | ||
| }); | ||
| csvPrinter.printRecord(csvValues); | ||
| } | ||
| } | ||
| } | ||
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| //给定一个csv文件，将所有所有列名a=x的行的列名b的值修改为y | ||
| public static void updateCsvColumnWhereAnotherColumnEquals(String csvFilePath, String updatedCsvFilePath, String targetColumnName, String conditionColumnName, String conditionValue, String newValue) throws IOException { | ||
| try ( | ||
| Reader reader = Files.newBufferedReader(Paths.get(csvFilePath)); | ||
| Writer writer = Files.newBufferedWriter(Paths.get(updatedCsvFilePath)); | ||
| CSVParser parser = new CSVParser(reader, CSVFormat.DEFAULT.withFirstRecordAsHeader()); | ||
| CSVPrinter printer = new CSVPrinter(writer, CSVFormat.DEFAULT.withHeader(parser.getHeaderMap().keySet().toArray(new String[0]))) | ||
| ) { | ||
| Map<String, Integer> headerMap = parser.getHeaderMap(); | ||
| Integer targetColumnIndex = headerMap.get(targetColumnName); | ||
| Integer conditionColumnIndex = headerMap.get(conditionColumnName); | ||
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| if (targetColumnIndex == null || conditionColumnIndex == null) { | ||
| throw new IllegalArgumentException("Column name not found in the CSV file"); | ||
| } | ||
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| // Iterate through records and update the target column where condition matches | ||
| for (CSVRecord record : parser) { | ||
| List<String> updatedRecord = new ArrayList<>(); | ||
| for (String value : record) { | ||
| updatedRecord.add(value); | ||
| } | ||
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| if (record.get(conditionColumnIndex).equals(conditionValue)) { | ||
| updatedRecord.set(targetColumnIndex, newValue); | ||
| } | ||
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| printer.printRecord(updatedRecord); | ||
| } | ||
| } | ||
| } | ||
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| } |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,40 @@ | ||
| import org.junit.Test; | ||
| import run.mone.excel.CsvExcelConverter; | ||
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| import java.io.IOException; | ||
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| /** | ||
| * @author wmin | ||
| * @date 2024/1/8 | ||
| */ | ||
| public class MyTest { | ||
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| @Test | ||
| public void testConvertCsvToExcel() { | ||
| try { | ||
| CsvExcelConverter.convertCsvToExcel("/Users/wmin/Downloads/miline_scaleOrder.csv","/Users/wmin/Downloads/miline_scaleOrder_0.xlsx"); | ||
| } catch (IOException e) { | ||
| throw new RuntimeException(e); | ||
| } | ||
| } | ||
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| @Test | ||
| public void testConvertExcelToCsv() { | ||
| try { | ||
| CsvExcelConverter.convertExcelToCsv("/Users/wmin/Downloads/miline_scaleOrder.xlsx","/Users/wmin/Downloads/miline_scaleOrder_0.csv"); | ||
| } catch (Exception e) { | ||
| throw new RuntimeException(e); | ||
| } | ||
| } | ||
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| @Test | ||
| public void testUpdateCsvColumnWhereAnotherColumnEquals() { | ||
| try { | ||
| CsvExcelConverter.updateCsvColumnWhereAnotherColumnEquals("/Users/wmin/Downloads/miline_scaleOrder.csv", | ||
| "/Users/wmin/Downloads/miline_scaleOrder1.csv", | ||
| "env", "id","60267","online"); | ||
| } catch (Exception e) { | ||
| throw new RuntimeException(e); | ||
| } | ||
| } | ||
| } |