我已经引用了这个问题的选定答案:Java:使用Java创建MSAccess数据库文件(.mdb 0r .accdb)。
我的机器中有MS Office 2010。我正在尝试创建访问数据库文件 (*.mdb/*.accdb)。但是,文件本身仍然没有创建,引发以下异常:
Exception in thread "main" java.io.FileNotFoundException: given file does not exist: C:Users473886Desktopemployeedb1.mdb
at com.healthmarketscience.jackcess.impl.DatabaseImpl.open(DatabaseImpl.java:360)
at com.healthmarketscience.jackcess.DatabaseBuilder.open(DatabaseBuilder.java:170)
at mdb.MDBWriter.createDatabase(MDBWriter.java:93)
at mdb.MDBWriter.startDatabaseProcess(MDBWriter.java:107)
at mdb.MDBWriter.main(MDBWriter.java:120)
我使用了答案中可用的相同代码,但进行了一次修改,我使用了文件对话框,该对话框将询问我要将数据库文件保存在哪里:
public class MDBWriter {
public static String saveFile(Frame f, String title, String defDir, String fileType) {
FileDialog fd = new FileDialog(f, title, FileDialog.SAVE);
fd.setFile(fileType);
fd.setDirectory(defDir);
fd.setLocation(50, 50);
fd.show();
return (fd.getDirectory() + "\" + fd.getFile());
}
private static Database createDatabase(String databaseName) throws IOException {
// return Database.create(new File(databaseName));
File file = new File(databaseName);
return new DatabaseBuilder(file)
.setFileFormat(Database.FileFormat.V2010)
.open();
}
private static TableBuilder createTable(String tableName) {
return new TableBuilder(tableName);
}
public static void addColumn(Database database, TableBuilder tableName, String columnName, Types sqlType) throws SQLException, IOException {
tableName.addColumn(new ColumnBuilder(columnName).setSQLType(Types.INTEGER).toColumn()).toTable(database);
}
public static void startDatabaseProcess() throws IOException, SQLException {
String fileName = saveFile(new Frame(), "Save...", ".\", "*.mdb");
String databaseName = "D:\employeedb1.accdb"; // Creating an MS Access database
Database database = createDatabase(fileName);
String tableName = "Employee"; // Creating table
Table table = createTable(tableName)
.addColumn(new ColumnBuilder("Emp_Id").setSQLType(Types.INTEGER).toColumn())
.addColumn(new ColumnBuilder("Emp_Name").setSQLType(Types.VARCHAR).toColumn())
.addColumn(new ColumnBuilder("Emp_Employer").setSQLType(Types.VARCHAR).toColumn())
.toTable(database);
table.addRow(122875, "Sarath Kumar Sivan","Infosys Limited.");//Inserting values into the table
}
public static void main(String[] args) throws IOException, SQLException {
startDatabaseProcess();
}
}
请提出一些解决方案。
如果要创建新数据库,则需要调用DatabaseBuilder.create()
,而不是open()
(这将打开现有数据库)。
无法从[Java]代码创建[访问数据库]!
废话。以下内容适用于任何具有Java和Jackcess的平台...
import com.healthmarketscience.jackcess.*;
import java.io.File;
public class bar {
public static void main(String[] args) {
try {
DatabaseBuilder.create(Database.FileFormat.V2010, new File("/home/gord/jTest.accdb"));
} catch (Exception e) {
e.printStackTrace();
}
System.out.println("Done!");
}
}
..下面的代码在没有 Jackcess 的情况下在 Windows 上的 Java 中工作(但需要 Access 数据库引擎)...
import java.io.*;
import java.nio.file.Files;
import java.nio.file.Paths;
public class CreateAccdb {
public static void main(String[] args) {
String databaseName = "C:\__tmp\employeedb1.accdb";
String tempScriptName = System.getenv("TEMP") + "\$$CreateAccdbScript.vbs";
try {
BufferedWriter out = new BufferedWriter(new FileWriter(tempScriptName));
out.write("Set cat = CreateObject("ADOX.Catalog")");
out.newLine();
out.write("cat.Create "Provider=Microsoft.ACE.OLEDB.12.0;Data Source=" + databaseName + ";"");
out.close();
} catch (IOException e) {
e.printStackTrace();
}
String cmd = "cscript " + tempScriptName;
try {
Process p = Runtime.getRuntime().exec(cmd);
p.waitFor();
BufferedReader rdr =
new BufferedReader(new InputStreamReader(p.getErrorStream()));
int errorLines = 0;
String line = rdr.readLine();
while (line != null) {
errorLines++;
System.out.println(line); // display error line(s), if any
line = rdr.readLine();
}
if (errorLines == 0) {
System.out.println("The operation completed successfully.");
}
} catch(Exception e) {
e.printStackTrace();
}
try {
Files.deleteIfExists(Paths.get(tempScriptName));
} catch(Exception e) {
e.printStackTrace();
}
}
}
根据此处提供的答案。唯一的解决方案是复制现有的空 mdb,连接到它并创建表等。无法从代码创建 mdb!