java：如何用代码控制H2 Database启动

1、纯手动start/stop

package com.cnblogs.yjmyzz.h2;

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

import org.h2.tools.Server;
import org.junit.Test;

public class H2ServerTest {

@Test
public void h2Test() {
start();
crudTest();
stop();
}

private Server server;

public void start() {
try {
System.out.println("正在启动h2...");
server = Server.createTcpServer(
new String[] { "-tcp", "-tcpAllowOthers", "-tcpPort",
"8043" }).start();
System.out.println("启动成功：" + server.getStatus());
} catch (SQLException e) {
System.out.println("启动h2出错：" + e.toString());

e.printStackTrace();
throw new RuntimeException(e);
}
}

public void stop() {
if (server != null) {
System.out.println("正在关闭h2...");
server.stop();
System.out.println("关闭成功.");
}
}

public void crudTest() {
try {
Class.forName("org.h2.Driver");

// connect to h2
Connection conn = DriverManager.getConnection(
"jdbc:h2:./h2db/sxaz42b4", "sa", "sa");

Statement stat = conn.createStatement();

// create table
stat.execute("CREATE TABLE TEST(NAME VARCHAR)");

// insert table
stat.execute("INSERT INTO TEST VALUES('菩提树下的杨过')");
stat.execute("INSERT INTO TEST VALUES('http://yjmyzz.cnblogs.com/')");

// retrive data
ResultSet result = stat.executeQuery("select name from test ");
int i = 1;
while (result.next()) {
System.out.println(i++ + ":" + result.getString("name"));
}

// drop table
stat.execute("DROP TABLE TEST");

result.close();
stat.close();
conn.close();
} catch (Exception e) {
e.printStackTrace();
}
}

}

输出：
正在启动h2...
启动成功：TCP server running at tcp://192.168.1.100:8043 (others can connect)
1:菩提树下的杨过
2:http://yjmyzz.cnblogs.com/
正在关闭h2...
关闭成功.

package com.cnblogs.yjmyzz.h2;

import java.sql.SQLException;

import org.h2.tools.Server;
import org.springframework.context.ApplicationContext;
import org.springframework.context.support.AbstractApplicationContext;
import org.springframework.context.support.ClassPathXmlApplicationContext;

public class App {

public static void main(String[] args) throws SQLException,
ClassNotFoundException {

ApplicationContext context = new ClassPathXmlApplicationContext(
"spring-context.xml");

Server h2Server = context.getBean(Server.class);
System.out.println(h2Server.getStatus());

H2ServerTest test = new H2ServerTest();
test.crudTest();

((AbstractApplicationContext) context).close();

}

}

输出：
TCP server running at tcp://192.168.1.100:8043 (others can connect)
1:菩提树下的杨过
2:http://yjmyzz.cnblogs.com/
注：用Spring注入的方式，不用刻意手动处理h2Server的start/stop

3、随webApp启动时，自动启动h2 server
a) 在web.xml最开头加入下面这段

<!-- h2 -->
<listener>
<listener-class>org.h2.server.web.DbStarter</listener-class>
</listener>
<context-param>
<param-name>db.url</param-name>
<param-value>jdbc:h2:r:/h2db/awbprint/x4z5gjb3</param-value>
</context-param>
<context-param>
<param-name>db.user</param-name>
<param-value>sa</param-value>
</context-param>
<context-param>
<param-name>db.password</param-name>
<param-value>sa</param-value>
</context-param>
<context-param>
<param-name>db.tcpServer</param-name>
<param-value>-tcpAllowOthers</param-value>
</context-param>

注：具体的文件位置及用户名、密码请自行修改，如果只允许本机连接，把
<context-param>
<param-name>db.tcpServer</param-name>
<param-value>-tcpAllowOthers</param-value>
</context-param>
去掉即可.
b) 然后在spring配置中参考下面的内容

<bean id="dataSource" class="org.h2.jdbcx.JdbcConnectionPool"
destroy-method="dispose">
<constructor-arg>
<bean class="org.h2.jdbcx.JdbcDataSource">
<!-- 文件方式：必须与web.xml中配置的h2db文件名一致 -->
<property name="URL" value="jdbc:h2:r:/h2db/awbprint/x4z5gjb3" />
<property name="user" value="sa" />
<property name="password" value="sa" />
</bean>
</constructor-arg>
</bean>

这样，webapp启动时，会先启动h2 server，后面的代码就能连接到h2了。其它应用也可以用
jdbc:h2:tcp://172.21.129.181/r:/h2db/awbprint/x4z5gjb3
的方式连接到该h2 server (中间加粗的红色IP地址，为web server对应的IP地址)