Question

我使用Eclipse，SQLite数据库和Hibernate。我想在我的项目中使用SchemaCrawler，已经有sqlite-jdbc库。我的目的是使用两个数据库的SchemaCrawler结构进行比较。但我甚至无法连接到我的第一个数据库。我正在使用此代码：

public class SchemaConroller {

    public SchemaConroller() {

        SchemaCrawlerOptions options = new SchemaCrawlerOptions();
        options.setSchemaInfoLevel(SchemaInfoLevelBuilder.standard());


        try {
            Connection conn = getConnection();
            Catalog catalog = SchemaCrawlerUtility.getCatalog(conn, options);
            for (Schema schema : catalog.getSchemas()) {
                System.out.println(schema);
                for (Table table : catalog.getTables(schema)) {
                    System.out.print("o--> " + table);
                    for (Column column : table.getColumns()) {
                        System.out.println("     o--> " + column);
                    }
                }
            }
        } catch (Exception e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
        }
    }

    private static Connection getConnection() throws SchemaCrawlerException, SQLException, ClassNotFoundException {
        String dbPath = "src/home/accounting/DB/myDatabase.sqlite";
        Class.forName("org.sqlite.JDBC");
        Connection c = DriverManager.getConnection("jdbc:sqlite:" + dbPath);
        return c;
    }
}

我总是得到错误：

Oct 12, 2017 1:31:50 PM schemacrawler.utility.SchemaCrawlerUtility matchDatabaseSpecificOverrideOptions
INFO: Using database plugin for 
Oct 12, 2017 1:31:50 PM schemacrawler.utility.TypeMap <init>
WARNING: Could not obtain data type map from connection
java.lang.NullPointerException
    at org.sqlite.jdbc3.JDBC3Connection.getTypeMap(JDBC3Connection.java:90)
    at schemacrawler.utility.TypeMap.<init>(TypeMap.java:116)
    at schemacrawler.crawl.RetrieverConnection.<init>(RetrieverConnection.java:194)
    at schemacrawler.crawl.SchemaCrawler.crawl(SchemaCrawler.java:870)
    at schemacrawler.utility.SchemaCrawlerUtility.getCatalog(SchemaCrawlerUtility.java:75)
    at home.accounting.controller.SchemaConroller.<init>(SchemaConroller.java:35)
    at home.accounting.DA.DBCheck.start(DBCheck.java:44)
    at home.accounting.MainApp.start(MainApp.java:83)
    at com.sun.javafx.application.LauncherImpl.lambda$launchApplication1$162(LauncherImpl.java:863)
    at com.sun.javafx.application.PlatformImpl.lambda$runAndWait$175(PlatformImpl.java:326)
    at com.sun.javafx.application.PlatformImpl.lambda$null$173(PlatformImpl.java:295)
    at java.security.AccessController.doPrivileged(Native Method)
    at com.sun.javafx.application.PlatformImpl.lambda$runLater$174(PlatformImpl.java:294)
    at com.sun.glass.ui.InvokeLaterDispatcher$Future.run(InvokeLaterDispatcher.java:95)
    at com.sun.glass.ui.win.WinApplication._runLoop(Native Method)
    at com.sun.glass.ui.win.WinApplication.lambda$null$148(WinApplication.java:191)
    at java.lang.Thread.run(Thread.java:748)

我从here下载了schemacrawler.jar。可能还需要其他任何罐子吗？

Answer 1

Alyona，您可以忽略您在问题中发布的日志中的警告。 sqlite-jdbc jar不完全符合JDBC标准，因此您必须特别关注该jar的版本。请使用版本3.7.8，该版本仅适用于SchemaCrawler distribution。此外，您将需要与您正在使用的SchemaCrawler版本对应的schemacrawler-sqlite jar。

Sualeh Fatehi，SchemaCrawler

SchemaCrawler需要哪些JAR文件？

1 个答案: