使用 hibernate 時僅在數據庫中插入最后一行

Question

AccountTable.java

import java.util.Date;

public class AccountTable { 

private int id;
private Date txDate;
private String txType;
private int accountId;
private int amount;

public int getId() {
    return id;
}
public void setId(int id) {
    this.id = id;
}
public Date getTxDate() {
    return txDate;
}
public void setTxDate(Date txDate) {
    this.txDate = txDate;
}
public String getTxType() {
    return txType;
}
public void setTxType(String txType) {
    this.txType = txType;
}
public int getAccountId() {
    return accountId;
}
public void setAccountId(int accountId) {
    this.accountId = accountId;
}
public int getAmount() {
    return amount;
}
public void setAmount(int amount) {
    this.amount = amount;
}
}

讀取Excel.java

import java.io.File;
import java.io.FileInputStream;
import java.io.FileNotFoundException;
import java.io.IOException;
import java.util.ArrayList;
import java.util.Date;
import java.util.Iterator;
import java.util.List;

import org.apache.poi.ss.usermodel.Cell;
import org.apache.poi.ss.usermodel.Row;
import org.apache.poi.xssf.usermodel.XSSFSheet;
import org.apache.poi.xssf.usermodel.XSSFWorkbook;
import org.hibernate.Session;
import org.hibernate.SessionFactory;
import org.hibernate.Transaction;
import org.hibernate.cfg.Configuration;

public class ReadExcel {
static List<AccountTable>acctList = new ArrayList<AccountTable>();

public static void main(String[] args){

       List<AccountTable>acctdetail=readExcel("D:\\Book1.xlsx");
       excelToDb(acctdetail);
}

@SuppressWarnings("unchecked")
private static List<AccountTable> readExcel(String filepath) {
   try {
       FileInputStream file = new FileInputStream(new      
   File("D:\\Book1.xlsx"));

       XSSFWorkbook workbook = new XSSFWorkbook(file);

       XSSFSheet sheet = workbook.getSheetAt(0);

       Iterator<Row> rowIterator = sheet.iterator();
       AccountTable account = new AccountTable();

       while (rowIterator.hasNext()) {
           Row row = rowIterator.next();

           if (row.getRowNum() == 0) {
               continue;
           }

           Iterator<Cell> cellIterator = row.cellIterator();
           while (cellIterator.hasNext()) {
               Cell cell = cellIterator.next();
               if (cell.getColumnIndex() == 0 ) {
                account.setId((int) cell.getNumericCellValue());
                   acctList.add(account);
                   System.out.print(cell.getNumericCellValue() + "\t\t");
               }
               else if (cell.getColumnIndex() == 1 ) {
                   account.setTxDate((Date)cell.getDateCellValue());
                   acctList.add(account);
                   System.out.print(cell.getDateCellValue() + "\t\t");
               }
               else if (cell.getColumnIndex() == 2 ) {
                   account.setTxType(cell.getStringCellValue());
                   acctList.add(account);
                   System.out.print(cell.getStringCellValue() + "\t\t");
               }
               else if (cell.getColumnIndex() == 3 ) {
                   account.setAccountId((int)cell.getNumericCellValue());
                   acctList.add(account);
                   System.out.print(cell.getNumericCellValue() + "\t\t");
               }
               else if (cell.getColumnIndex() == 4 ) {
                   account.setAmount((int)cell.getNumericCellValue());
                   acctList.add(account);
                   System.out.print(cell.getNumericCellValue() + "\t\t");
               }
           }
          
           System.out.println("");
         }

       file.close(); 
       
}catch (FileNotFoundException fnfe) {
   fnfe.printStackTrace();
} catch (IOException e) {
   e.printStackTrace();
}
   return acctList;
}

private static void excelToDb(List<AccountTable> accountDt) {

       Configuration c = new Configuration();
       c.configure("/hibernate.cfg.xml");
      
       SessionFactory sf = c.buildSessionFactory();
       
       Session s = sf.openSession();

     Transaction tx = s.beginTransaction();
       
       try {
           for (int i = 0; i < accountDt.size(); i++) {
              AccountTable acc = accountDt.get(i);
               s.save(acc);
       }
       
       tx.commit();
       s.close();

   } catch (Exception e) {
       tx.rollback();
   }
   }
   }

映射.hbm.xml

<?xml version="1.0" encoding="utf-8"?>
<!DOCTYPE hibernate-mapping PUBLIC 
 "-//Hibernate/Hibernate Mapping DTD//EN"
 "http://www.hibernate.org/dtd/hibernate-mapping-3.0.dtd">
 
<hibernate-mapping>
    <class name="com.example.AccountTable" table="account_detail">
     <id name="id" type="int" column="Tx_id">
        </id>
        <property name="txDate" column="Tx_Date" type="date" />
        <property name="txType" column="Account_type" type="string" />
        <property name="accountId" column="Account_id" type="int" />    
        <property name="amount" column="Amount" type="int" />
    </class>
</hibernate-mapping>

hibernate.cgf.xml

<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE hibernate-configuration PUBLIC
      "-//Hibernate/Hibernate Configuration DTD 3.0//EN"
      "http://hibernate.sourceforge.net/hibernate-configuration-3.0.dtd">

<hibernate-configuration>

<session-factory>
    <property name="dialect">org.hibernate.dialect.PostgreSQLDialect</property>
    <property name="connection.url">jdbc:postgresql://localhost:5432/example</property>
    <property name="connection.username">postgres</property>
    <property name="connection.password">*****</property>
    <property name="connection.driver_class">org.postgresql.Driver</property>
    <property name="show_sql">true</property>
    <property name="format_sql">true</property>
   
        <mapping resource="mapping.hbm.xml" />
</session-factory>
</hibernate-configuration>

我正在使用 hibernate 進行 java 項目。 我有一個包含 10 個數據的 excel 文件。 我已成功從 excel 文件中檢索到數據。 現在我必須將這些數據插入數據庫。

問題是只有最后一行被添加到表中。 沒有插入其他行。

提前感謝您抽出寶貴的時間來幫助我解決此問題。

Answer 1

把這一行AccountTable account = new AccountTable(); 在 While 循環內。