Java中如何使用嵌入MySQL

package net.simple.mysql;

import java.io.File;
import java.util.HashMap;
import java.util.Map;
import java.util.Properties;
import java.util.Set;

import com.mysql.management.MysqldResource;

public final class EmbedMySqlServer {
    private MysqldResource mysqlInstance;
    //配置信息
    public final Properties props;
    //端口信息
    private String port;
    /**
     * 考虑到数据库的性能问题,允许将数据库放在其它磁盘
     */
    private String embedMySqlHome;

    public EmbedMySqlServer(final Properties props) {
        this.props = props;
    }

    public EmbedMySqlServer(final Properties props, String embedMySqlHome) {
        this.embedMySqlHome = embedMySqlHome;
        this.props = props;
    }

    public final String getEmbedMySqlHome() {
        return null == embedMySqlHome ? getPlatformBaseDir() : embedMySqlHome;
    }

    /**
    * 获得当前应用主目录
    * @return 当前应用启动程序所在目录.
    */
    public static String getPlatformBaseDir() {
        return System.getProperty("user.dir");
    }

    public static boolean isBlank(final String str) {
        int strLen;
        if (str == null || (strLen = str.length()) == 0) {
            return true;
        }
        for (int i = 0; i < strLen; i++) {
            if (Character.isWhitespace(str.charAt(i)) == false) {
                return false;
            }
        }
        return true;
    }

    public void startup() {
        final File baseDir = new File(getEmbedMySqlHome(), "mysql-em");
        mysqlInstance = new MysqldResource(baseDir);
        port = props.getProperty("port");
        if (isBlank(port))
            props.put("port", port = String.valueOf((int) (Math.random() * 40000)));
        final Set<Object> keys = props.keySet();
        final Map<String, String> options = new HashMap<String, String>(keys.size());
        for (final Object key : keys) {
            final String val = props.getProperty(key.toString());
            if ("".equals(val))
                options.put(key.toString(), null);
            else
                options.put(key.toString(), val.replace("{$contextPath}", getPlatformBaseDir()));
        }
        if (!mysqlInstance.isRunning())
            mysqlInstance.start("Em_MySQL", options, false, keys.contains("defaults-file"));
    }

    public String getPort() {
        return port;
    }

    /**
     * 判断mysql是否正在运行
     */
    public boolean isRunning() {
        return null == mysqlInstance ? false : mysqlInstance.isRunning();
    }

    public void shutdown() {
        if (mysqlInstance != null)
            mysqlInstance.shutdown();
    }

    public void cleanup() {
        if (mysqlInstance != null)
            mysqlInstance.cleanup();
    }
}

public static void main(String[] args) {
        try {
            Properties pro = new Properties();
            //根据机器配置，设置不同的参数
            pro.load(MysqlTest.class.getResourceAsStream("MySql_medium.properties"));
            new EmbedMySqlServer(pro).startup();
            //可以把数据库放到其他磁盘
            //new EmbedMySqlServer(pro,"f:\\").startup();
            Connection conn = getTestConnection();
            System.out.println(conn.isClosed());
            conn.close();
        } catch (Exception e) {
            e.printStackTrace();
        }
    }