好的直接问题.. 我有一个excel，填充约5万至6万行.. 我必须将excel内容上传到mysql，通常我使用apache poi来读取并将其上传到mysql，但是这个文件无法使用apache poi读取因为文件是LARGE .. 任何人都可以指导我怎么做吗？这是我使用apache poi将内容上传到mysql的示例代码（适用于包含1000-2000行的一些小xlsx文件）
public static void uploadCrossSellCorpCard(FileItem file, String dbtable) {
System.out.println("UploadUtil Running" + file.getFileName().toString());
try {
for(int i = 0; i<=sheetx.getLastRowNum(); i++){
row = sheetx.getRow(i);
try{
int oc = (int) row.getCell(0).getNumericCellValue();
if((String.valueOf(oc).matches("[A-Za-z0-9]{3}"))){
String rm_name = row.getCell(1).getStringCellValue();
String company = row.getCell(2).getStringCellValue();
String product = row.getCell(3).getStringCellValue();
String detail = row.getCell(4).getStringCellValue();
String type = row.getCell(5).getStringCellValue();
String sql = "INSERT INTO " + dbtable + " VALUES('"
+ oc + "','" + rm_name + "','" + company + "','"
+ product + "','" + detail + "','" + type + "')";
save(sql);
System.out.println("Import rows " + i);
}
} catch (IllegalStateException e) {
e.printStackTrace();
} catch (NullPointerException e) {
System.out.println(e);
}
}
System.out.println("Success import xlsx to mysql table");
} catch (NullPointerException e){
System.out.println(e);
System.out.println("Select the file first before uploading");
}
}
感谢前进，感谢抱歉我的英语不好：）
注意：我使用hibernate方法处理上传模式..“save（sql）”正在调用我的hibernate方法答案 0 :(得分：0)
您可以尝试使用Apache POI SAX - 阅读部分 - ＆gt; https://poi.apache.org/spreadsheet/how-to.html
上的 XSSF和SAX（事件API）您可以读取整个excel，包括60k行甚至100k行，就像读取xml文件一样。你唯一需要注意的是空单元格，因为空单元格的xml标签只会跳过它的单元格，但你可能想在db表中为表示空值的单元格更新空值。
解决方案 - ＆gt;你可以在循环中读取每一行和fire insert语句。如果出现间隙，则通过监视单元格地址来监视空单元格，然后检查相应的列名称，并相应地使用空值更新插入语句。
我希望这会对你有所帮助。下面的示例代码读取excel并将其存储在ArrayList的ArrayList中以进行表格表示。我在控制台打印消息 - ＆＃34;新行开始＆＃34;在开始阅读和打印之前。打印单元格值本身之前的每个值的单元格数。
我没有处理空单元格的单元格间隙，但您可以根据查找单元格间隙进行编码，因为在我的情况下，我没有空单元格。 在控制台中查找单元格地址，帮助您发现任何间隙并按照您的意愿处理它。
运行此代码并为我工作正常。别忘了添加 xmlbeans-2.3.0.jar 然后是import语句所需的罐子。
import java.io.InputStream;
import java.util.ArrayList;
import org.apache.commons.lang3.time.DurationFormatUtils;
import org.apache.commons.lang3.time.StopWatch;
import org.apache.poi.xssf.eventusermodel.XSSFReader;
import org.apache.poi.xssf.model.SharedStringsTable;
import org.apache.poi.xssf.usermodel.XSSFRichTextString;
import org.apache.poi.openxml4j.opc.OPCPackage;
import org.xml.sax.Attributes;
import org.xml.sax.ContentHandler;
import org.xml.sax.InputSource;
import org.xml.sax.SAXException;
import org.xml.sax.XMLReader;
import org.xml.sax.helpers.DefaultHandler;
import org.xml.sax.helpers.XMLReaderFactory;
public class ExcelToStringArray implements Cloneable {
public static ArrayList<ArrayList<StringBuilder>> stringArrayToReturn = new ArrayList<ArrayList<StringBuilder>>();
public static ArrayList<StringBuilder> retainedString;
public static Integer lineCounter = 0;
public ArrayList<ArrayList<StringBuilder>> GetSheetInStringArray(String PathtoFilename, String rId)
throws Exception {
ExcelToStringArray myParser = new ExcelToStringArray();
myParser.processOneSheet(PathtoFilename, rId);
return stringArrayToReturn;
}
public void processOneSheet(String PathtoFilename, String rId) throws Exception {
OPCPackage pkg = OPCPackage.open(PathtoFilename);
XSSFReader r = new XSSFReader(pkg);
SharedStringsTable sst = r.getSharedStringsTable();
XMLReader parser = fetchSheetParser(sst);
InputStream sheet = r.getSheet(rId);
InputSource sheetSource = new InputSource(sheet);
parser.parse(sheetSource);
sheet.close();
}
public XMLReader fetchSheetParser(SharedStringsTable sst) throws SAXException {
XMLReader parser = XMLReaderFactory.createXMLReader("org.apache.xerces.parsers.SAXParser");
ContentHandler handler = new SheetHandler(sst);
parser.setContentHandler(handler);
return parser;
}
private class SheetHandler extends DefaultHandler {
private SharedStringsTable sst;
private String lastContents;
private boolean nextIsString;
private SheetHandler(SharedStringsTable sst) {
this.sst = sst;
}
public void startElement(String uri, String localName, String name, Attributes attributes) throws SAXException {
if (name.equals("row")) {
retainedString = new ArrayList<StringBuilder>();
if (retainedString.isEmpty()) {
stringArrayToReturn.add(retainedString);
retainedString.clear();
}
System.out.println("New row begins");
retainedString.add(new StringBuilder(lineCounter.toString()));
lineCounter++;
}
// c => cell
if (name.equals("c")) {
// Print the cell reference
System.out.print(attributes.getValue("r") + " - ");
// System.out.print(attributes.getValue("r") + " - ");
// Figure out if the value is an index in the SST
String cellType = attributes.getValue("t");
if (cellType != null && cellType.equals("s")) {
nextIsString = true;
} else {
nextIsString = false;
}
}
// Clear contents cache
lastContents = "";
}
public void endElement(String uri, String localName, String name) throws SAXException {
// Process the last contents as required.
// Do now, as characters() may be called more than once
if (nextIsString) {
int idx = Integer.parseInt(lastContents);
lastContents = new XSSFRichTextString(sst.getEntryAt(idx)).toString();
nextIsString = false;
}
// v => contents of a cell
// Output after we've seen the string contents
if (name.equals("v")) {
System.out.println(lastContents);
// value of cell what it string or number
retainedString.add(new StringBuilder(lastContents));
}
}
public void characters(char[] ch, int start, int length) throws SAXException {
lastContents += new String(ch, start, length);
}
}
public static void main(String[] args) throws Exception {
StopWatch watch = new StopWatch();
watch.start();
ExcelToStringArray generate = new ExcelToStringArray();
// rID1 is first sheet in my workbook for rId2 for second sheet and so
// on.
generate.GetSheetInStringArray("D:\\Users\\NIA\\Desktop\\0000_MasterTestSuite.xlsx", "rId10");
watch.stop();
System.out.println(DurationFormatUtils.formatDurationWords(watch.getTime(), true, true));
System.out.println("done");
System.out.println(generate.stringArrayToReturn);
}
}