如何使用java创建可附加的Excel工作表
我想创建一个可追加的excel工作表。 我有四列stream1 stream2 stream3 stream4 第一次仅在第一列插入数据(stream1) 在那之后,我想一个接一个地填满其他列 这是我正在使用的代码:如何使用java创建可附加的Excel工作表,java,excel,apache-poi,jxl,Java,Excel,Apache Poi,Jxl,我想创建一个可追加的excel工作表。 我有四列stream1 stream2 stream3 stream4 第一次仅在第一列插入数据(stream1) 在那之后,我想一个接一个地填满其他列 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";
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。它是一行一行地插入数据
高级thx。我想您的代码只要稍加修改就可以了 试着替换 int i=1 以下是: int i=sheet1.getLastRowNum()+1 您还需要更改一下读写文件的实现