我正在编写一个程序,该程序从一个模式中提取数据,重组数据以适应新模式,然后将数据插入到具有新模式的新数据库中。问题是,在我的测试代码中,最后一条记录没有插入到新数据库中。
我附上了下面代码的一个大大简化的版本,它仍然重现了这个问题。谁能告诉我如何修复以下问题,以便将记录集中的所有记录插入目标数据库?目前,以下确实正确打印出 system.out.println 中的最后一条记录,但之后最后一条记录不存在于目标表中:
static void migrateDataTest(){
try {
Class.forName("sun.jdbc.odbc.JdbcOdbcDriver");
Connection sourceConn = DriverManager.getConnection("jdbc:odbc:source_data_test");
Statement st = sourceConn.createStatement();
Connection destinationConn = DriverManager.getConnection("jdbc:odbc:receive_data_test");
int ClientNumber; String ClientsLastName; String ClientsFirstName;
ResultSet rest = st.executeQuery("SELECT ClientNumber, ClientsLastName, ClientsFirstName FROM sourceTable");
PreparedStatement ps5 = null;
while(rest.next()){
ClientNumber = rest.getInt(1);
ClientsLastName = rest.getString(2);
ClientsFirstName = rest.getString(3);
System.out.println(ClientNumber+", "+ClientsLastName+", "+ClientsFirstName);
ps5 = destinationConn.prepareStatement(
"INSERT INTO destinationTable ("
+ "ClientNumber, FirstName, LastName) VALUES (?, ?, ?)"
);
ps5.setInt(1, ClientNumber);
ps5.setString(2, ClientsFirstName);
ps5.setString(3, ClientsLastName);
ps5.executeUpdate();
destinationConn.commit();
}
ps5.close();
}
catch (ClassNotFoundException cnfe){cnfe.printStackTrace();}
catch (SQLException e) {e.printStackTrace();}
}
编辑:
根据 Lokesh 的要求,我将创建此错误的整个代码块放在下面。我只是再次运行它以确认它正在打印 system.out.println 中的记录 30,但目标表不包含记录号 30。跳过的记录正在使用 system.out.println 打印出来这一事实使我相信下面的代码包含错误:
static void migrateDataTest(){
try {
Class.forName("sun.jdbc.odbc.JdbcOdbcDriver");
Connection sourceConn = DriverManager.getConnection("jdbc:odbc:source_test");
Statement st = sourceConn.createStatement();
Connection destinationConn = DriverManager.getConnection("jdbc:odbc:receive_data_test");
int ClientNumber;
String ClientsLastName;
String ClientsFirstName;
String ClientsMiddleInitial;
Date DOB;
int GenderNumber;
int RaceNumber;
ResultSet rest = st.executeQuery("SELECT ClientNumber, ClientsLastName, ClientsFirstName, ClientsMiddleInitial, DOB, GenderNumber, RaceNumber FROM sourceTable");
PreparedStatement ps5 = null;
while(rest.next()){
ClientNumber = rest.getInt(1);
ClientsLastName = rest.getString(2);
ClientsFirstName = rest.getString(3);
ClientsMiddleInitial = rest.getString(4);
DOB = rest.getDate(5);
GenderNumber = rest.getInt(6);
RaceNumber = rest.getInt(7);
System.out.println(ClientNumber+", "+ClientsLastName+", "+ClientsFirstName+", "+ClientsMiddleInitial+", "+DOB+", "+GenderNumber+", "+RaceNumber);
ps5 = destinationConn.prepareStatement(
"INSERT INTO destinationTable ("
+ "ClientNumber, FirstName, MiddleInitial, LastName, DOB, GenderNumber, RaceNumber) "
+"VALUES (?, ?, ?, ?, ?, ?, ?)"
);
ps5.setInt(1, ClientNumber);
ps5.setString(2, ClientsFirstName);
ps5.setString(3, ClientsMiddleInitial);
ps5.setString(4, ClientsLastName);
ps5.setDate(5, DOB);
ps5.setInt(6, GenderNumber);
ps5.setInt(7, RaceNumber);
ps5.executeUpdate();
destinationConn.commit();
}
ps5.close();
}
catch (ClassNotFoundException cnfe){cnfe.printStackTrace();}
catch (SQLException e) {e.printStackTrace();}
}