我正在尝试用我正在处理的 Java 项目中的 Ormlite 替换现有的数据库代码。
但是,当我调用 create() 将对象插入 SQLite 数据库时,它会引发 SQLException。我想我可能犯了一个明显的错误,但我无法弄清楚它是什么。这是代码:
public class OrmliteTest {
private final String DATABASE_URL = "jdbc:sqlite:test.sqlite";
private JdbcConnectionSource connectionSource = null;
private Dao<Article, Integer> articleDao;
public OrmliteTest() throws SQLException{
connectionSource = new JdbcConnectionSource(DATABASE_URL);
TableUtils.createTableIfNotExists(connectionSource, Article.class);
articleDao = DaoManager.createDao(connectionSource, Article.class);
Article article1 = new Article("articles", "idnumber", "blah blah blah", (int)(new Date().getTime()/1000));
articleDao.createOrUpdate(article1); // throws SQLException - why?
}
}
@DatabaseTable(tableName = "articles")
class Article {
public static final String CATEGORY_FIELD_NAME = "category";
public static final String ARTICLEID_FIELD_NAME = "articleid";
public static final String BODY_FIELD_NAME = "body";
public static final String ADDED_FIELD_NAME = "added";
@DatabaseField(generatedId = true)
public int id;
@DatabaseField(columnName = CATEGORY_FIELD_NAME)
public String category;
@DatabaseField(columnName = ARTICLEID_FIELD_NAME)
public String articleId;
@DatabaseField(columnName = BODY_FIELD_NAME)
public String body;
@DatabaseField(columnName = ADDED_FIELD_NAME)
public int added;
public Article() {}
public Article(String category, String articleId, String body, int added) {
setCategory(category);
setArticleId(articleId);
setBody(body);
setAdded(added);
}
...getters and setters...
}
调用 时会引发异常articleDao.createOrUpdate(article1)
。这是回溯:
java.sql.SQLException: Unable to run insert stmt on object com.myapp.tester.Article@7a36824: INSERT INTO `articles` (`category` ,`storyid` ,`body` ,`added` ) VALUES (?,?,?,?)
at com.j256.ormlite.misc.SqlExceptionUtil.create(SqlExceptionUtil.java:22)
at com.j256.ormlite.stmt.mapped.MappedCreate.insert(MappedCreate.java:90)
at com.j256.ormlite.stmt.StatementExecutor.create(StatementExecutor.java:325)
at com.j256.ormlite.dao.BaseDaoImpl.create(BaseDaoImpl.java:287)
at com.j256.ormlite.dao.BaseDaoImpl.createOrUpdate(BaseDaoImpl.java:312)
at com.myapp.tester.OrmliteBugTester.<init>(OrmliteBugTester.java:128)
at com.myapp.tester.Tester.main(Tester.java:24)
Caused by: java.sql.SQLException: NYI
at org.sqlite.Conn.prepareStatement(Conn.java:217)
at com.j256.ormlite.jdbc.JdbcDatabaseConnection.insert(JdbcDatabaseConnection.java:105)
at com.j256.ormlite.stmt.mapped.MappedCreate.insert(MappedCreate.java:63)
... 5 more
我究竟做错了什么?