Derby初接触

Derby是个java数据库。

第一次接触，用了下druid的连接池。

还是maven下的，下面上代码：

pom：

<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
  xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
  <modelVersion>4.0.0</modelVersion>

  <groupId>DerbyTest</groupId>
  <artifactId>DerbyTest</artifactId>
  <version>0.0.1-SNAPSHOT</version>
  <packaging>jar</packaging>

  <name>DerbyTest</name>
  <url>http://maven.apache.org</url>

  <properties>
    <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
  </properties>

  <dependencies>
    <dependency>
      <groupId>junit</groupId>
      <artifactId>junit</artifactId>
      <version>3.8.1</version>
      <scope>test</scope>
    </dependency>
    
    <dependency>
    <groupId>org.apache.derby</groupId>
    <artifactId>derby</artifactId>
    <version>10.10.2.0</version>
</dependency>

        <dependency>
            <groupId>com.alibaba</groupId>
            <artifactId>druid</artifactId>
            <version>1.0.7</version>
        </dependency>
    
  </dependencies>
</project>

DruidTest.java:

package DerbyTest.DerbyTest;

import java.sql.Connection;
import java.sql.SQLException;

import com.alibaba.druid.pool.DruidDataSource;

public class DruidTest {

    private static DruidDataSource druidDataSource=new DruidDataSource();
    
    static{
        druidDataSource.setDriverClassName("org.apache.derby.jdbc.EmbeddedDriver");
        druidDataSource.setUrl("jdbc:derby:S:\derbyTest;create=true");
        //druidDataSource.setValidationQuery("select 1 from test ");
        druidDataSource.setTestWhileIdle(false);
        
        try {
            druidDataSource.init();
        } catch (SQLException e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
        }
        
    }
    
    public static Connection getConn(){
        try {
            return druidDataSource.getConnection();
        } catch (SQLException e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
            return null;
        }
    }
}

主类的：

package DerbyTest.DerbyTest;

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.Set;
import java.util.UUID;

/**
 * Hello world!
 *
 */
public class App {
    public static void main(String[] args) throws SQLException {

        Connection conn = DruidTest.getConn();
        PreparedStatement ps;
        try {
            ps = conn.prepareStatement("create table one(id varchar(255) primary key, str varchar(20)) ");
            ps.execute();
        } catch (Exception e) {
            // e.printStackTrace();
        }

        ps = conn.prepareStatement("insert into one(id,str) values(?,'hi') ");
        UUID uuid = UUID.randomUUID();
        ps.setString(1, "x" + uuid);
        ps.executeUpdate();

        ps = conn.prepareStatement("select * from one ");
        ps.execute();
        ResultSet result = ps.executeQuery();
        while (result.next()) {
            System.out.print(result.getString(1) + "---");
            System.out.println(result.getString(2));

        }


        System.out.println("Hello World!");
    }
}