,直到我升级到Java 7(我猜测) HOWTO创建从Java连接数据库的语法我的代码附上sqlitedsb到另一个工作得很好?我的语法使用SQL-Tool可以正常工作,但是来自JAVA的我没有成功。附加DB SQLite中从Java
我的代码:
import java.sql.Connection;
import java.sql.DriverManager;
import java.sql.SQLException;
import java.sql.Statement;
public class TesteAttachDB {
public static void main(String[] args) {
// TODO Auto-generated method stub
testattach();
}
public static void testattach(){
Connection connection_historymapsdb = null;
String sTargetDB="C://temp//historydb11_maps_en.db";
try {
Class.forName("org.sqlite.JDBC");
connection_historymapsdb = DriverManager.getConnection("jdbc:sqlite:" + sTargetDB);
} catch (ClassNotFoundException e1) {
e1.printStackTrace();
} catch (SQLException e2) {
e2.printStackTrace();
}
Statement statement;
try {
//String sDatabasetoattach="C://temp//test.db";
//String sDatabasetoattach="C:/temp/test.db";
String sDatabasetoattach="C:\temp\test.db";
//String sDatabasetoattach="C:\temp\\userdb\test.db";
statement = connection_historymapsdb.createStatement();
String sSQL="Attach '" + sDatabasetoattach + "' as chronica_maps_tests";
System.out.println(sSQL);
statement.execute(sSQL);
String sTestSQL="select count(*) from chronica_maps_tests.testtable";
statement.execute(sTestSQL);
System.out.println("worked.");
} catch (SQLException e) {
e.printStackTrace();
}
}
}
错误消息:
答:
Attach 'C://temp//test.db' as chronica_maps_tests
java.sql.SQLException: unable to open database: C://temp//test.db
at org.sqlite.DB.execute(DB.java:275)
at org.sqlite.Stmt.exec(Stmt.java:56)
at org.sqlite.Stmt.execute(Stmt.java:83)
at maps.TesteAttachDB.testattach(TesteAttachDB.java:48)
at maps.TesteAttachDB.main(TesteAttachDB.java:15)
B:
Attach 'C:/temp/test.db' as chronica_maps_tests
java.sql.SQLException: unable to open database: C:/temp/test.db
at org.sqlite.DB.execute(DB.java:275)
at org.sqlite.Stmt.exec(Stmt.java:56)
at org.sqlite.Stmt.execute(Stmt.java:83)
at maps.TesteAttachDB.testattach(TesteAttachDB.java:48)
at maps.TesteAttachDB.main(TesteAttachDB.java:15)
C:
Attach 'C: emp est.db' as chronica_maps_tests
java.sql.SQLException: no such table: chronica_maps_tests.testtable
hat funktioniert !
at org.sqlite.DB.throwex(DB.java:288)
at org.sqlite.NestedDB.prepare(NestedDB.java:115)
at org.sqlite.DB.prepare(DB.java:114)
at org.sqlite.Stmt.execute(Stmt.java:82)
at maps.TesteAttachDB.testattach(TesteAttachDB.java:52)
at maps.TesteAttachDB.main(TesteAttachDB.java:15)
我尝试不同的语法(A,B,C)为sSQL,但毫无效果。 SQL字符串应该如何?
您有特权吗?尝试在不同的驱动器。 – Keerthivasan
是的,我有权限访问。已经尝试过。那不是问题。 –
您正在使用单个('),尝试在文件名周围使用双引号(“)(也显示在[this](http://stackoverflow.com/a/9068549/3080094)answer)。 “C:\\ temp \\ test.db”(逃避Java代码中的转义)将起作用吗? – vanOekel