ucanaccess

问题 Hi I am developing a small application for insurance domain. I am getting an error when I am using the update statement in my program. The error is net.ucanaccess.jdbc.UcanaccessSQLException: unexpected token: HALF java.lang.NullPointerException The code is btnUpdate = new JButton("UPDATE"); btnUpdate.setMnemonic('U'); btnUpdate.setFont(new Font("Times New Roman", Font.BOLD, 11)); GridBagConstraints gbc_btnUpdate = new GridBagConstraints(); gbc_btnUpdate.insets = new Insets(0, 0, 5, 5); gbc

问题 Hi I am developing a small application for insurance domain. I am getting an error when I am using the update statement in my program. The error is net.ucanaccess.jdbc.UcanaccessSQLException: unexpected token: HALF java.lang.NullPointerException The code is btnUpdate = new JButton("UPDATE"); btnUpdate.setMnemonic('U'); btnUpdate.setFont(new Font("Times New Roman", Font.BOLD, 11)); GridBagConstraints gbc_btnUpdate = new GridBagConstraints(); gbc_btnUpdate.insets = new Insets(0, 0, 5, 5); gbc

问题 I've developed a Java application (a dictionary) with an Access database to store the words of the dictionary and I'm getting ready to distribute it. I want to encrypt my database with a password to prevent people to access my words. When I set a passwords the Java code shows this Exception net.ucanaccess.jdbc.UcanaccessSQLException: Decoding not supported. Please choose a CodecProvider which supports reading the current database encoding. at net.ucanaccess.jdbc.UcanaccessDriver.connect

问题 Hey I am reading a database using ucanaccess-5.0.0. The database is propably < Access 2000, since it's not UTF-8. It seems like I have to setup a charset. I tried this using the charset parameter in the url: jdbc:ucanaccess://${databaseFile.absolutePath};memory=false;charSet=Cp1250 It seems to be ignored, since I still don't get my german umlauts out of the DB. What can I do about it? 回答1: Working Solution: class DatabaseOpener : JackcessOpenerInterface { override fun open(fl: File, pwd:

问题 I keep getting the 'No suitable driver found' in my database and I can't pin down what's wrong with my connect class? Any help? I've got all 5 jars in. I want to connect to a Microsoft Access Database. import java.sql.*; public class Connect { public Connection con; Statement st; public Connect() { try { Class.forName("net.ucanaccess.jdbc.UcanaccessDriver"); Connection con=DriverManager.getConnection("jdbc:ucanaccess:E://EclipsePortable//Data//workspace//ThisWillWork//res//Railway.accdb");

问题 I've been researching this problem for days and have decided to ask this question here to see if anyone can help point me in the right direction. I'm trying to populate combo boxes in my Netbeans 8.0.2 program with data from an MS Access 2013 table. I'm using the most recent "Ucanaccess" with all of its necessary components to get the connection between the two, and from what I can tell the connection is good. However, when I run the program, it pops up an error exception message, reading:

问题 I have tried to create three tables(CUSTOMERS, VEHICLES and RENTALS), the third table (RENTALS) has foreign keys referring to the two primary keys of the first two tables (CUSTOMERS and RENTALS). When creating this third table I get an error Missing columns in relationship(Rel=CUSTOMERS[[]] -> RENTALS[[]]) Here's my codes private void createTables() throws SQLException { Statement statement = conn.createStatement(); statement.executeUpdate("CREATE TABLE CUSTOMERS(custNumber AUTOINCREMENT

问题 ResultSet rs; PreparedStatement ps; Connection con; public Attribute() { try{ con = DriverManager.getConnection("jdbc:ucanaccess://D:/programming/myassignment/Database1.accdb"); System.out.println("Java is now connected to database"); }catch(Exception ex){ System.out.println(ex); } JButton btnAdd = new JButton("Add"); btnAdd.addActionListener(new ActionListener() { public void actionPerformed(ActionEvent e) { try{ PreparedStatement pstmt = (PreparedStatement) con.prepareStatement("insert into

问题 ResultSet rs; PreparedStatement ps; Connection con; public Attribute() { try{ con = DriverManager.getConnection("jdbc:ucanaccess://D:/programming/myassignment/Database1.accdb"); System.out.println("Java is now connected to database"); }catch(Exception ex){ System.out.println(ex); } JButton btnAdd = new JButton("Add"); btnAdd.addActionListener(new ActionListener() { public void actionPerformed(ActionEvent e) { try{ PreparedStatement pstmt = (PreparedStatement) con.prepareStatement("insert into

问题 When I run this query: select character from tbl_Unknown where format(fw,'.###')='48.143' and code='0001' it returns a result in the Access query interface but when I try to run it from Java it doesn't return a result. My table (tbl_Unknown): char_id: autonumber value:1 fw: short text value:'48.1425' Hint:after format it become '48.143'. code: short text value:'0001' character: short text value: 'x' My java code: public static String getLostedCharacter(String font,String fw, String code) {