32.9 Copy table) Suppose the database contains a student table defined as follows:
create table Student1 (
username varchar(50) not null,
password varchar(50) not null,
fullname varchar(200) not null,
constraint pkStudent primary key (username)
);
Create a new table named Student2 as follows:
create table Student2 (
username varchar(50) not null,
password varchar(50) not null,
firstname varchar(100),
lastname varchar(100),
constraint pkStudent primary key (username)
);
A full name is in the form of firstname mi lastname or firstname
lastname . For example, John K Smith is a full name. Write a program that copies table Student1 into Student2 . Your task is to split a full name into
firstname , mi , and lastname for each record in Student1 and store a new
record into Student2 .
create table Student1 (
username varchar(50) not null,
password varchar(50) not null,
fullname varchar(200) not null,
constraint pkStudent primary key (username)
);
Create a new table named Student2 as follows:
create table Student2 (
username varchar(50) not null,
password varchar(50) not null,
firstname varchar(100),
lastname varchar(100),
constraint pkStudent primary key (username)
);
A full name is in the form of firstname mi lastname or firstname
lastname . For example, John K Smith is a full name. Write a program that copies table Student1 into Student2 . Your task is to split a full name into
firstname , mi , and lastname for each record in Student1 and store a new
record into Student2 .
import java.io.IOException; import java.net.MalformedURLException; import java.sql.Connection; import java.sql.DriverManager; import java.sql.PreparedStatement; import java.sql.ResultSet; import java.sql.SQLException; import java.sql.Statement; import java.util.Scanner; public class Exercise09 { public static void main(String[] args) throws MalformedURLException, IOException, ClassNotFoundException, SQLException { Class.forName("com.mysql.jdbc.Driver"); Connection connection = DriverManager.getConnection("jdbc:mysql://localhost/javabook", "root", "root"); Statement statement = connection.createStatement(); ResultSet rset = statement.executeQuery("select * from Student1"); String queryString = "insert into Student2 (username, password, firstname, lastname) values (?, ?, ?, ?);"; while(rset.next()) { PreparedStatement preparedStatement = connection.prepareStatement(queryString); preparedStatement.setString(1, rset.getString(1)); preparedStatement.setString(2, rset.getString(2)); Scanner name = new Scanner(rset.getString(3)); String name1 = name.next(); String name2 = name.next(); if(name.hasNext()) { preparedStatement.setString(3, name1 + " " + name2); preparedStatement.setString(4, name.next()); } else { preparedStatement.setString(3, name1); preparedStatement.setString(4, name2); } name.close(); preparedStatement.executeUpdate(); } } }
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