sqlite的基本使用示例

To：上一篇文章

上一文章写得有点复杂，需要创建datasource，然后还有一大堆的封装方法，这里参考官网上（https://bitbucket.org/xerial/sqlite-jdbc#markdown-header-usage）的示例，如下：

具体流程

（1）Connection conn = DriverManager.getConnection("jdbc:sqlite:***/smaple");

（2）Statement statement = conn.createStatement();

（3）statement.executeUpdate("select/insert/drop/delete等sql语句");

（4）conn.close()

注意：关于在windows/Linux/以及在内存上创建sqlite数据库有一下集中方法：

（1）Windows上创建connection

Connection connection = DriverManager.getConnection("jdbc:sqlite:C:/work/mydatabase.db");

（2）Linux上创建connection

Connection connection = DriverManager.getConnection("jdbc:sqlite:/home/leo/work/mydatabase.db");

（3）没有db文件，只在内存上临时创建

Connection connection = DriverManager.getConnection("jdbc:sqlite::memory:");

import java.sql.Connection;
import java.sql.DriverManager;
import java.sql.ResultSet;
import java.sql.SQLException;
import java.sql.Statement;

public class Sample
{
public static void main(String[] args) throws ClassNotFoundException
{
// load the sqlite-JDBC driver using the current class loader
Class.forName("org.sqlite.JDBC");

Connection connection = null;
try
{
// create a database connection
connection = DriverManager.getConnection("jdbc:sqlite:sample.db");
Statement statement = connection.createStatement();
statement.setQueryTimeout(30);  // set timeout to 30 sec.

statement.executeUpdate("drop table if exists person");
statement.executeUpdate("create table person (id integer, name string)");
statement.executeUpdate("insert into person values(1, 'leo')");
statement.executeUpdate("insert into person values(2, 'yui')");
ResultSet rs = statement.executeQuery("select * from person");
while(rs.next())
{
// read the result set
System.out.println("name = " + rs.getString("name"));
System.out.println("id = " + rs.getInt("id"));
}
}
catch(SQLException e)
{
// if the error message is "out of memory",
// it probably means no database file is found
System.err.println(e.getMessage());
}
finally
{
try
{
if(connection != null)
connection.close();
}
catch(SQLException e)
{
// connection close failed.
System.err.println(e);
}
}
}
}