我无法将记录插入到在oracle数据库中创建的表中。 我在做什么错？

Question

    import java.sql.*;
import sun.jdbc.odbc.JdbcOdbcDriver;
class Jdbc1
{
    public static void main(String[] args) throws Exception
    {
        JdbcOdbcDriver jd=new JdbcOdbcDriver();
        DriverManager.registerDriver(jd);
        Connection con=DriverManager.getConnection("jdbc:odbc:sai123","SYSTEM","sai123");
        Statement st=con.createStatement();
        int res=st.executeUpdate("insert into A1 values('1','tomato','10')");
        System.out.println(res+"record is inserted..");
        st.close();
        con.close();
    }
}

and I have creates the table as:

CREATE TABLE A1(
INO INTEGER NOT NULL,
INAME CHAR(30) NOT NULL,
IPRICE INTEGER NOT NULL
);

When I compile and run the java prog it says "1 record inserted.." but when I open my table in SQLdeveloper I dont find any updates in the table. They are all null! I have also set the classpath for ojdbc-6.jar. What mistake am I doing herE? Are there any other files that I should copy and paste? I am just a beginner so kindly please help. And how does my program in the Editplus direct the updates directly into the table created in SQL. What path does it follow?

Answer 1

Oracle has auto-commit set to false by default. Either set autocommit to true from Oracle Sql Developer (or code) or commit your changes from code:

//before con.close()
con.commit();

Or if you want to set to auto-commit:

//after creating Connection
conn.setAutoCommit(true);

Answer 2

Try committing the Record by calling conn.commit();

also refer the Why Execute Update Says, one row updated on insert query

the final code for main should look like public static void main(String[] args) throws Exception
{
JdbcOdbcDriver jd=new JdbcOdbcDriver();
DriverManager.registerDriver(jd);
Connection con=DriverManager.getConnection("jdbc:odbc:sai123","SYSTEM","sai123");
Statement st=con.createStatement();
int res=st.executeUpdate("insert into A1 values('1','tomato','10')");
System.out.println(res+"record is inserted..");
con.commit();
st.close();
con.close();
}
public static void main(String[] args) throws Exception
{
JdbcOdbcDriver jd=new JdbcOdbcDriver();
DriverManager.registerDriver(jd);
Connection con=DriverManager.getConnection("jdbc:odbc:sai123","SYSTEM","sai123");
Statement st=con.createStatement();
int res=st.executeUpdate("insert into A1 values('1','tomato','10')");
System.out.println(res+"record is inserted..");
con.commit();
st.close();
con.close();
}


Answer 3

Is it possible that your Java code and SQLDeveloper are referring to different schema? I would suggest to do the following

1. Make INO the Primary Key of the table
2. Put con.commit(); between int res=st.executeUpdate("insert into A1 values('1','tomato','10')"); and System.out.println(res+"record is inserted..");
3. Run the program multiple times to check if you are getting Primary Key violation exception. This will tell you if your program is inserting to a table you are not looking at.