小编Nan*_*tha的帖子

String dburl = "jdbc:mysql://localhost:3306/librarymanagementsystem";
String user = "nandika";
String password = "nandika";

public void createConnection(int id, String name, String author, String 
    publisher) {
    try {
        Connection mycon = DriverManager.getConnection(dburl);
        Statement mystmt = mycon.createStatement();
        String sql = "insert into addbook" + "(Book ID,Book 
        Name,Author,Publisher)" + "values" + "(" + id + "," + name + "," + 
        author + "," + publisher + ")";

        mystmt.executeUpdate(sql);
        System.out.println("updated");
    } catch (Exception ex) {

    }

execute update 是另一个类中的一个方法。这个代码段似乎有什么问题？数据库不更新！！