java - 语句中未找到表

Question

Class.forName("org.hsqldb.jdbcDriver");
    conn = DriverManager.getConnection("jdbc:hsqldb:file:Pokemondaten","sa","");
    getData = conn.createStatement();
    ResultSet rs = getData.executeQuery
    ("SELECT HP FROM PKMN WHERE ID = " + basicnumber); 
    int hpp = rs.getInt(1);
    System.out.println(hpp);

我得到的只是

java.sql.SQLException: Table not found in statement [SELECT HP FROM PKMN]
    at org.hsqldb.jdbc.Util.sqlException(Unknown Source)
    at org.hsqldb.jdbc.jdbcStatement.fetchResult(Unknown Source)
    at org.hsqldb.jdbc.jdbcStatement.executeQuery(Unknown Source)
    at pokeWpRechner.Main.main(Main.java:46)

我的 Databased 被调用Pokemondaten，我的表被调用PKMN，我的表也在程序中被继承。

那么我做错了什么？我不明白。

Answer 1

尝试以下

conn = DriverManager.getConnection("jdbc:hsqldb:file:Pokemondaten;shutdown=true","sa","")

这应该可以防止表定义丢失

Answer 2

我认为您需要在 JDBC URL 中提供数据库文件的完整路径：

DriverManager.getConnection("jdbc:hsqldb:file:c:\mydir\Pokemondaten","sa","");