ucanaccess

问题 I am trying to get data from a database in a table with 2 where parameters, When i try to execute this code it gives the error: Parameter not set. I think it is a small mistake but I can't find it. The problem could be with the 2 where parameters, i never used 2 before. Can anyone help me? public static void tabelVullen(int Kaartnummer,int Datum){ Connection con; try { con = DriverManager.getConnection(DB, "", ""); PreparedStatement s = con.prepareStatement("Select Kaartnummer, Datum,

问题 This question already has answers here : UCanAccess driver not found when converted to JAR file (2 answers) Closed 3 years ago . I have developed a small game in which the text input by the user needs to be posted in a MS Access Database. It all works fine in NetBeans but whenever I access it from the JAR file (which is ultimately what I need to hand to my client), it does not post anything to the database. In fact it returns the following error: java.sql.SQLException: No suitable driver

问题 I've been working on a program with a .mdb database from a third party client. Everything was fine until I've tried to update elements on the database. The sortOrder field is not correct. I've tried to change it to general with MS Access, and had no luck. The message I get when I execute the update query is: java.lang.IllegalArgumentException: Given index Index@150ab4ed[ name: (EXART) PrimaryKey number: 2 isPrimaryKey: true isForeignKey: false data: IndexData@3c435123[ dataNumber: 2

问题 I use UCanAccess (4.0.2) to create a new file with a single table like this: // Create a database + connect DatabaseBuilder.create(FileFormat.V2010, new File(path)); Class.forName("net.ucanaccess.jdbc.UcanaccessDriver"); conn = DriverManager.getConnection("jdbc:ucanaccess://" + path + ";singleconnection=true" ,"", ""); // Create table String sql = "CREATE TABLE Test (id AUTOINCREMENT PRIMARY KEY, value CHAR(1) NOT NULL)"; conn.createStatement().executeUpdate(sql); The code works but the

问题 After a lot of learning on ByteArrays & BLOBS, I managed to write the below Java code to write an image into Access DB (Using ucanaccess) and writing it back to Disk. When I write an image back to disk the image is in incorrect format or something is messed up that you cannot open that image. I understand it is not a good practice to store Images on DB but, this is only for my learning. public static void Update_to_DB() throws SQLException, IOException { String URL = "jdbc:ucanaccess://C:\

问题 I'm getting a warning message like this when connecting to some databases: Error in the metadata of the table tblCourses: table's row count in the metadata is 69 but 37 records have been found and loaded by UCanAccess. All will work fine, but it's better to repair your database. The records in my database were not all retrieve. I didn't know row count is gotten from metadata? Anyone who knows how to solve this bug? 回答1: It's not a bug. UCanAccess is simply reporting that the row count in the

问题 I'm trying to use UCanAccess to connect a Java application to an Access database but when I run my Java app I get the error that UCANACCESS_HOME system variable isn't defined... I have added the six jar files to the project library in NetBeans. I've also added the path to the directory where the ucanaccess-3.0.3.jar file is stored to the PATH system variable in Windows 10. I also tried creating a new system variable UCANACCESS_HOME with no luck. Any help that could point me in the right

问题 I have a Java program which uses UCanAccess to read an Access database. When I export my program to a JAR file I can't read the database file that is inside the JAR. I tried with getClass().getResource("/Database.accdb").getPath() but it doesn't work. How can I fix it? 回答1: You cannot open the database file directly from the copy imbedded in the runnable JAR file. UCanAccess requires that the database file be a "real" file, so you'll need to extract it from the JAR and then open that copy.

问题 This question already has answers here : Retrieve column names from java.sql.ResultSet (12 answers) Closed 3 years ago . I want to get all the column names for a specific table called Impedance2, in an Access database I have. I can only seem to get column metadata I think rather than the actual name: This is the code I am using: DatabaseMetaData md = conn.getMetaData(); ResultSet rst = md.getTables(null, null, "Impedance2", null); ResultSetMetaData rsmd = rst.getMetaData(); System.out.println

问题 I'm a Java-Newbie an I'm trying to build my first app. I read lots of tutorials and demos and searched for concrete answers to my question but haven't found something that helps. For testing I wrote this class, that connects an access database with a JTable. Now I want to add this Class in a main app but therefore i have to change my exisiting class to JPanel. I tested some changes, but I don't get an output JTable inside my app anymore. Can anybody explain the way I have to change my class?