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[英]How to create folders and subfolders of the data present inside Excelsheet using java
[英]how to create appendable excelsheet using java
我想创建一个可附加的excel表。 就像我有四列stream1 stream2 stream3 stream4
第一次我只插入数据第一列(stream1)之后,我想逐个完全填充其他列。
这是我正在使用的代码:
public void createFile(Jqueue stream1, Jqueue stream2, Jqueue stream3, Jqueue stream4) {
try {
String filename = "path";
boolean alreadyExists = (new File(filename)).exists();
HSSFRow rowhead = sheet1.createRow((short) 0);
rowhead.createCell((short) 0).setCellValue("Stream 1");
rowhead.createCell((short) 1).setCellValue("Stream 2");
rowhead.createCell((short) 2).setCellValue("Stream 3");
rowhead.createCell((short) 3).setCellValue("Stream 4");
int i = 1;
while (!stream1.isEmpty()) {
String urlstream1 = "";
String urlstream2 = "";
String urlstream3 = "";
String urlstream4 = "";
HSSFRow row = sheet1.createRow((short) i);
try {
if (stream1.size() > 0) {
urlstream1 = stream1.dequeue().toString();
}
} catch (Exception ex) {
}
try {
if (stream2.size() > 0) {
urlstream2 = stream2.dequeue().toString();
}
} catch (Exception ex) {
}
try {
if (stream3.size() > 0) {
urlstream3 = stream3.dequeue().toString();
}
} catch (Exception ex) {
}
try {
if (stream4.size() > 0) {
urlstream4 = stream4.dequeue().toString();
}
} catch (Exception ex) {
}
row.createCell((short) 0).setCellValue(urlstream1);
row.createCell((short) 1).setCellValue(urlstream2);
row.createCell((short) 2).setCellValue(urlstream3);
row.createCell((short) 3).setCellValue(urlstream4);
i++;
}
FileOutputStream fileOut = new FileOutputStream(filename);
hwb.write(fileOut);
fileOut.close();
但这不是可追加的代码。 它逐行插入数据。
thx in advanced。
我想你的代码应该稍微改变一下。
尝试更换
int i = 1;
以下内容:
int i = sheet1.getLastRowNum()+ 1;
您还需要更改读取和写入文件的实现。
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