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HsqlDB Demo
import java.sql.Connection;
import java.sql.DriverManager;
import java.sql.ResultSet;
import java.sql.SQLException;
import java.sql.Statement;
import java.util.logging.Level;
import java.util.logging.Logger;
import org.hsqldb.Server;
import org.hsqldb.result.Result;
/**
* 方便单机程序使用HSQL的工具类，包括启动，关闭，连接。数据库默认不加密，用户为sa，密码空
* @author 郑高强
*/
public class HSQL_Util {
public static final int PORT = 9002;
public static final String DB_NAME = "kenko"; //数据库文件名，同时也是本类中的数据库名
public static final String DB_PATH = "./db/";
public static final String USER_NAME = "sa";
public static final String PASSWORD = "";
public static final int SERVER_MODE = 0;
public static final int STAND_ALONE_MODE = 1; //In-Process
public static int mode = SERVER_MODE; //记录当前用什么模式，开发时用Server，发布时用standalone
/**
* 测试
*/
public static void main(String[] args) {
HSQL_Util.mode = HSQL_Util.STAND_ALONE_MODE;
HSQL_Util.startHSQL();
// Connection conn = HSQL_Util.getConnection();
try {
createDB();
// testQuery();
} catch (SQLException ex) {
Logger.getLogger(HSQL_Util.class.getName()).log(Level.SEVERE, null, ex);
}
HSQL_Util.stopHSQL();
}
private static void createDB() throws SQLException {
Statement statement = getConnection().createStatement();
statement.executeUpdate("create table customer2(id integer not null primary key,firstname varchar(100),lastname varchar(100))");
for (int i = 10; i < 60000; i++) {
statement.executeUpdate("insert into customer2 values(" + i + ",‘liu‘,‘zhaoyang‘)");
}
statement.close();
}
private static void testQuery() throws SQLException {
Connection conn = HSQL_Util.getConnection();
ResultSet r = conn.createStatement().executeQuery("select * from customer");
while(!r.isLast()){
r.next();
Object o = r.getObject(1);
Object o1 = r.getObject(2);
System.out.println(o.toString()+o1.toString());
}
}
/**
* 启动数据库服务
*/
public static boolean startHSQL() {
if (mode == SERVER_MODE) {
Server server = new Server();//它可是hsqldb.jar里面的类啊。
server.setDatabaseName(0, DB_NAME);
server.setDatabasePath(0, DB_PATH + DB_NAME);
server.setPort(PORT);
server.setSilent(true);
server.start(); //自动多线程运行
System.out.println("hsqldb started...");
} else if (mode == STAND_ALONE_MODE) {
//standalone模式，打开连接就同时启动数据库，所以这里可以什么都不做
System.out.println("hsqldb STAND_ALONE_MODE started...");
}
try {
Thread.sleep(800); // 等待Server启动
} catch (InterruptedException e) {
}
return true;
}
/**
* 关闭数据库服务
*/
public static boolean stopHSQL() {
try {
Statement statement = getConnection().createStatement();
statement.executeUpdate("SHUTDOWN;");
return true;
} catch (SQLException ex) {
Logger.getLogger(HSQL_Util.class.getName()).log(Level.SEVERE, null, ex);
return false;
}
}
/**
* 获取连接
*/
public static Connection getConnection() {
Connection conn = null;
try {
Class.forName("org.hsqldb.jdbcDriver");
if (mode == SERVER_MODE) {
conn = DriverManager.getConnection("jdbc:hsqldb:hsql://localhost:" + PORT + "/" + DB_NAME, USER_NAME, PASSWORD);
} else if (mode == STAND_ALONE_MODE) {
conn = DriverManager.getConnection("jdbc:hsqldb:file:" + DB_PATH + DB_NAME, USER_NAME, PASSWORD);
}
} catch (ClassNotFoundException ex) {
Logger.getLogger(HSQL_Util.class.getName()).log(Level.SEVERE, null, ex);
} catch (SQLException ex) {
Logger.getLogger(HSQL_Util.class.getName()).log(Level.SEVERE, null, ex);
}
return conn;
}
}
HsqlDB Demo