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.

2、借助Spring

     <bean id="h2Server" class="org.h2.tools.Server"
         factory-method="createTcpServer" init-method="start" destroy-method="stop">
         <constructor-arg value="-tcp,-tcpAllowOthers,-tcpPort,8043" />
     </bean>

示例代码：

 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)