相关疑难解决方法(0)

我下载了一个hsqldb.jar并设置为项目buildpath，然后我编写了程序

  Class.forName("org.hsqldb.jdbc.JDBCDriver");
Connection conn = DriverManager.getConnection(
                     "jdbc:hsqldb:mem:mydb", "SA", "");

String bookTableSQL = "create table MY_TABLE ("+
" TITLE varchar(256) not null primary key,"+
" AUTHOR varchar(256) not null"+
");";

Statement st = conn.createStatement();
st.execute(bookTableSQL);
System.out.println(st);
String sql = "INSERT INTO MY_TABLE " +
"VALUES ('Mahnaz', 'Fatma')";

st.executeUpdate(sql);

数据库和表创建成功。在下一步中，我插入了一个示例数据并获得了正在显示的数据

String sqlsel = "SELECT TITLE,AUTHOR FROM MY_TABLE";
 ResultSet rs = st.executeQuery(sqlsel);
 //STEP 5: Extract data from result set
 while(rs.next()){
    //Retrieve by column name
     String id  = rs.getString("TITLE");
     String age = rs.getString("AUTHOR");

    //Display …