我的目标是将excel中的每一行数据保存到MySQL数据库中。在我的excel文件中,日期格式为dd.MM.yyyy,而yyyy-MM-dd是MySQL中的日期格式。
以下是我的代码:
import java.io.FileInputStream;
import java.io.IOException;
import java.sql.Connection;
import java.sql.DriverManager;
import java.sql.PreparedStatement;
import org.apache.poi.ss.usermodel.DataFormatter;
import org.apache.poi.ss.usermodel.Row;
import org.apache.poi.xssf.usermodel.XSSFSheet;
import org.apache.poi.xssf.usermodel.XSSFWorkbook;
public class ExcelReader {
public static void main(String[] args) throws Exception {
try {
Class.forName("com.mysql.jdbc.Driver");
Connection con = (Connection) DriverManager.getConnection("jdbc:mysql://localhost:3306/activity", "root", "password");
con.setAutoCommit(false);
PreparedStatement pstm = null ;
FileInputStream input = new FileInputStream("testing.xlsx");
//POIFSFileSystem fs = new POIFSFileSystem( input );
XSSFWorkbook wb = new XSSFWorkbook(input);
XSSFSheet sheet = wb.getSheetAt(0);
Row row;
for(int i=1; i<=sheet.getLastRowNum(); i++){
row = sheet.getRow(i);
String activityName= row.getCell(5).getStringCellValue();
Integer activityAllocation = (int) row.getCell(8).getNumericCellValue();
//DataFormatter dataFormatter = new DataFormatter();
//String activityDate = dataFormatter.formatCellValue(row.getCell(10));
Date activityDate = row.getCell(10).getDateCellValue();
SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd");
String Date = sdf.format(activityDate);
String activityPersonInCharge = row.getCell(11).getStringCellValue();
String sql = "INSERT INTO activity(ACTIVITY_NAME,ACTIVITY_ALLOCATION,ACTIVITY_DATE,ACTIVITY_MADE_BY) VALUES('"+activityName+"','"+activityAllocation +"','"+activityDate +"','"+activityPersonInCharge +"')";
pstm = (PreparedStatement) con.prepareStatement(sql);
pstm.execute();
System.out.println("Import rows "+i);
}
con.commit();
pstm.close();
con.close();
input.close();
System.out.println("Success import excel to mysql table");
}
catch (IOException e) {
e.printStackTrace();
}
}
}
我尝试格式化excel单元格的日期,但无法正常工作。例外:
Exception in thread "main" java.lang.IllegalStateException: Cannot get a NUMERIC value from a STRING cell
at org.apache.poi.xssf.usermodel.XSSFCell.typeMismatch(XSSFCell.java:1062)
at org.apache.poi.xssf.usermodel.XSSFCell.getNumericCellValue(XSSFCell.java:307)
at org.apache.poi.xssf.usermodel.XSSFCell.getDateCellValue(XSSFCell.java:776)
at ExcelReader.main(ExcelReader.java:35)
我错误地执行了哪些代码?此外,如果我使用日期格式化程序的注释代码行,没有显示异常,但它保存错误的日期。请指导我。提前致谢
答案 0 :(得分:3)
以字符串
获取值String activityDate = row.getCell(10).getStringCellValue();
根据您的格式为19.06.2014
所以
SimpleDateFormat sdf = new SimpleDateFormat("dd.MM.yyyy");
然后将其解析为日期
Date dt = sdf.parse(activityDate);
使用PreparedStatment插入
设置值(第3列?)
ps.setDate (3, dt);