在内存中创建mdb副本时出错

Class#getResourceAsStream 要打开资源。。。

final String dbResourcePath = "/embedded.accdb";
@SuppressWarnings("rawtypes")
Class thisClass = JackcessTestMain.class;  // my "main" class
InputStream dbResourceStream = null;
// for running from executable jar 
dbResourceStream = thisClass.getResourceAsStream("/resources" + dbResourcePath);
if (dbResourceStream == null) {
    // for running inside the Eclipse IDE
    dbResourceStream = thisClass.getResourceAsStream(dbResourcePath);
}

... 传过来 InputStream 一个傻瓜 MemFileChannel ...

MemFileChannel mfc = MemFileChannel.newChannel(dbResourceStream);

DatabaseBuilder 打开 Database

Database db = new DatabaseBuilder().setChannel(mfc).open()

完成对数据库内存副本的更改后,可以将通道的内容发送到OutputStream。例如,

db.close();
FileOutputStream fos = new FileOutputStream("C:/Users/Public/zzz.accdb");
mfc.transferTo(fos);
fos.close();