Java HSSF createrow每次仅创建一行
我试图创建一个包含多个工作表的工作簿,但每个excel工作表中始终只有一行,这是源文件中的最后一行。 我的代码如下所示:Java HSSF createrow每次仅创建一行,java,excel,apache-poi,hssf,Java,Excel,Apache Poi,Hssf,我试图创建一个包含多个工作表的工作簿,但每个excel工作表中始终只有一行,这是源文件中的最后一行。 我的代码如下所示: public void parse() { BufferedReader reader = null; BufferedWriter writer = null; String tmpFile = "tmpFile.tmp"; ExcelFile excelFile = new ExcelFile(_fileName + ".xlsx");
public void parse()
{
BufferedReader reader = null;
BufferedWriter writer = null;
String tmpFile = "tmpFile.tmp";
ExcelFile excelFile = new ExcelFile(_fileName + ".xlsx");
int lineCount = 0;
try
{
reader = new BufferedReader(new FileReader(_fileName));
writer = new BufferedWriter(new FileWriter(tmpFile));
String line = null;
while ( (line = reader.readLine()) != null)
{
String newLine = processLine(line.trim());
if (newLine == null)
continue;
else
{
if (newLine.isEmpty() )
{
lineCount++;
if(lineCount > 1)
{
continue;
}
}
else if (!newLine.isEmpty())
{
lineCount = 0;
}
if (getRepositoryName(newLine) != null && !getRepositoryName(newLine).isEmpty() )
excelFile.writeLine(getRepositoryName(newLine), newLine);
}
}
reader.close();
excelFile.createFile(_fileName.split("\\.")[0]);
}
catch (IOException e) {
e.printStackTrace();
}
}
public void writeLine(String sheetName, String line)
{
HSSFSheet sheet = getSheet2(sheetName);
HSSFSheet sheetMain = getSheet2(_mainSheetName);
HSSFRow row = sheet.createRow(sheet.getLastRowNum() == 0 ? 0 :sheet.getLastRowNum()+1);
HSSFRow rowMain = sheetMain.createRow(sheetMain.getLastRowNum() == 0 ? 0 :sheetMain.getLastRowNum()+1);
String[] columnsArr = line.split(",");
for (int i = 0; i < columnsArr.length ; i++)
{
HSSFCell cell = row.createCell(i);
HSSFCell cellMain = rowMain.createCell(i);
cell.setCellValue(columnsArr[i]);
cellMain.setCellValue(columnsArr[i]);
}
}
每行的创建由以下人员完成:
excelFile.writeLine(getRepositoryName(换行符),换行符);
从以前的方法
ExcelFile类中的writeLine实现如下:
public void parse()
{
BufferedReader reader = null;
BufferedWriter writer = null;
String tmpFile = "tmpFile.tmp";
ExcelFile excelFile = new ExcelFile(_fileName + ".xlsx");
int lineCount = 0;
try
{
reader = new BufferedReader(new FileReader(_fileName));
writer = new BufferedWriter(new FileWriter(tmpFile));
String line = null;
while ( (line = reader.readLine()) != null)
{
String newLine = processLine(line.trim());
if (newLine == null)
continue;
else
{
if (newLine.isEmpty() )
{
lineCount++;
if(lineCount > 1)
{
continue;
}
}
else if (!newLine.isEmpty())
{
lineCount = 0;
}
if (getRepositoryName(newLine) != null && !getRepositoryName(newLine).isEmpty() )
excelFile.writeLine(getRepositoryName(newLine), newLine);
}
}
reader.close();
excelFile.createFile(_fileName.split("\\.")[0]);
}
catch (IOException e) {
e.printStackTrace();
}
}
public void writeLine(String sheetName, String line)
{
HSSFSheet sheet = getSheet2(sheetName);
HSSFSheet sheetMain = getSheet2(_mainSheetName);
HSSFRow row = sheet.createRow(sheet.getLastRowNum() == 0 ? 0 :sheet.getLastRowNum()+1);
HSSFRow rowMain = sheetMain.createRow(sheetMain.getLastRowNum() == 0 ? 0 :sheetMain.getLastRowNum()+1);
String[] columnsArr = line.split(",");
for (int i = 0; i < columnsArr.length ; i++)
{
HSSFCell cell = row.createCell(i);
HSSFCell cellMain = rowMain.createCell(i);
cell.setCellValue(columnsArr[i]);
cellMain.setCellValue(columnsArr[i]);
}
}
public void writeLine(字符串sheetName,字符串行)
{
HSSFSheet sheet=getSheet2(sheetName);
HSSFSheet sheetMain=getSheet2(_mainSheetName);
HSSFRow row=sheet.createRow(sheet.getLastRowNum()==0?0:sheet.getLastRowNum()+1);
HSSFRow rowMain=sheetMain.createRow(sheetMain.getLastRowNum()==0?0:sheetMain.getLastRowNum()+1);
String[]columnsArr=line.split(“,”);
对于(int i=0;i
需要知道我做错了什么,以及在不在循环中运行时是否可能创建多行
提前谢谢 问题在于:
HSSFRow row = sheet.createRow(sheet.getLastRowNum() == 0 ? 0 :sheet.getLastRowNum()+1);
HSSFRow rowMain = sheetMain.createRow(sheetMain.getLastRowNum() == 0 ? 0 :sheetMain.getLastRowNum()+1);
第一次方法sheet.getLastRowNum()
返回0
,因此sheet.createRow
作为参数提供0
。但下一次结果相同,您再次创建行0
(在循环的每个迭代中都是相同的)
从getLastRowNum()的
由于excel文件格式的特殊性,如果调用此方法的结果为零,则无法判断这是否意味着工作表上有零行,或者在零位置有一行。对于这种情况,另外调用getPhysicalNumberOfRows()来判断位置0处是否有行
因此,类似这样的方法应该有效:
HSSFRow row = sheet.createRow(sheet.getPhysicalNumberOfRows() == 0 ? 0 :sheet.getLastRowNum()+1);
HSSFRow rowMain = sheetMain.createRow(sheetMain.getPhysicalNumberOfRows() == 0 ? 0 :sheetMain.getLastRowNum()+1);
谢谢你的回答!我能够看到并理解这就是发生的情况,但仍然无法理解为什么每次都不递增,以及我应该做些什么来解决这个问题。我认为您可以使用
getPhysicalNumberOfRows()
方法。我已经更新了我的answear以显示该解决方案。