我有我的代码编写来保存我的用户的数据在excel文件到MySQL数据库。当我运行它时,除日期错误外,一切正常。在excel文件中,日期格式是dd.MM.yyyy,而MySQL中的日期格式是yyyy-MM-dd。在我的代码中,我应该如何转换日期格式并将其保存到数据库中?更改日期格式的Excel日期数据,同时保存到数据库与Java
这些代码:
import java.io.FileInputStream;
import java.sql.*;
import java.util.ArrayList;
import java.util.Iterator;
import java.util.List;
import java.util.Vector;
import org.apache.poi.xssf.usermodel.XSSFCell;
import org.apache.poi.xssf.usermodel.XSSFRow;
import org.apache.poi.xssf.usermodel.XSSFSheet;
import org.apache.poi.xssf.usermodel.XSSFWorkbook;
public class ExcelToDb {
public static void main(String [] args) {
String fileName="testing.xlsx";
Vector dataHolder=read(fileName);
saveToDatabase(dataHolder);
}
public static Vector read(String fileName) {
Vector cellVectorHolder = new Vector();
try{
FileInputStream myInput = new FileInputStream(fileName);
//POIFSFileSystem myFileSystem = new POIFSFileSystem(myInput);
XSSFWorkbook myWorkBook = new XSSFWorkbook(myInput);
XSSFSheet mySheet = myWorkBook.getSheetAt(0);
Iterator rowIter = mySheet.rowIterator();
while(rowIter.hasNext()){
XSSFRow myRow = (XSSFRow) rowIter.next();
Iterator cellIter = myRow.cellIterator();
//Vector cellStoreVector=new Vector();
List list = new ArrayList();
while(cellIter.hasNext()){
XSSFCell myCell = (XSSFCell) cellIter.next();
list.add(myCell);
}
cellVectorHolder.addElement(list);
}
}catch (Exception e){e.printStackTrace(); }
return cellVectorHolder;
}
private static void saveToDatabase(Vector dataHolder) {
String activityId="";
String activityName="";
String activityAllocation="";
String activityDate="";
String activityPersonInCharge="";
System.out.println(dataHolder);
for(Iterator iterator = dataHolder.iterator();iterator.hasNext();) {
List list = (List) iterator.next();
activityId= list.get(0).toString();
activityName= list.get(5).toString();
activityAllocation= list.get(8).toString();
activityDate= list.get(10).toString();
activityPersonInCharge= list.get(11).toString();
try {
Class.forName("com.mysql.jdbc.Driver").newInstance();
Connection con = DriverManager.getConnection("jdbc:mysql://localhost:3306/TEST", "root", "password");
System.out.println("connection made...");
PreparedStatement stmt=con.prepareStatement("INSERT INTO TEST_DEMO(ACT_ID,ACT_NAME,ACT_ALLOCATION,ACT_DATE,ACT_PERSON_ON_CHARGE) VALUES(?,?,?,?,?)");
stmt.setString(1, activityId);
stmt.setString(2, activityName);
stmt.setString(3, activityAllocation);
stmt.setString(4, activityDate);
stmt.setString(5, activityPersonInCharge);
stmt.executeUpdate();
System.out.println("Data is inserted");
stmt.close();
con.close();
} catch (ClassNotFoundException e) {
e.printStackTrace();
} catch (SQLException e) {
e.printStackTrace();
} catch (InstantiationException e) {
e.printStackTrace();
} catch (IllegalAccessException e) {
e.printStackTrace();
}
}
}
}
请提供日期格式部分一些线索。
在此先感谢。
你在哪里Date是Strings?将它们保存为日期 –
我可以举个例子吗?好的。如果我从字符串更改为日期,那么等号(=)后应该是什么?对不起,仍然是这个新手。 –