添加數組時出現PreparedStatment錯誤

我正在使用SPRING famework，並且當前正在嘗試在創建新條目（行）時將數組添加到數據庫中。有問題的列被稱爲「關鍵字」。因此，這裏是我的SQL初始化代碼（這看起來好像沒什麼問題）添加數組時出現PreparedStatment錯誤

CREATE TABLE IF NOT EXISTS Email (
    Email_Id INT UNSIGNED NOT NULL AUTO_INCREMENT, 
    Sender_Email VARCHAR(255) NOT NULL, 
    Recipient_Email VARCHAR(255) NOT NULL, 
    Subject VARCHAR(255) NOT NULL, 
    Body TEXT, 
    Attachment_Path VARCHAR(255) NOT NULL, 
    Creation_Date DATETIME NOT NULL, 
    MaxKeywords INT UNSIGNED NOT NULL, 
    Keywords VARCHAR(255) NOT NULL, 
    Primary Key(Email_Id) 
);

這裏是代碼是崩潰和燃燒我的附加功能：

public boolean add(final MessageDto emailDto){ 
    boolean result = false; 
    int rowsAffected; 
    KeyHolder keyHolder = new GeneratedKeyHolder(); 
    final String sql; 

    sql = "INSERT INTO email (Sender_Email, Recipient_Email, Subject, Body, Attachment_Path, Creation_Date, MaxKeywords, Keywords) " + 
      "VALUES (?, ?, ?, ?, ?, ?, ?, ?)"; 

    try{ 
     rowsAffected = getJdbcTemplate().update(
        new PreparedStatementCreator() { 
         public PreparedStatement createPreparedStatement(Connection connection) throws SQLException { 
          PreparedStatement statement = 
            connection.prepareStatement(sql, new String[] {"emailId"}); 

          String[] foo = {"A","B"}; 

          statement.setString(1, emailDto.getFrom()); 
          statement.setString(2, emailDto.getTo()); 
          statement.setString(3, emailDto.getSubject()); 
          statement.setString(4, emailDto.getBody()); 
          statement.setString(5, emailDto.getAttachmentPath()); 
          statement.setTimestamp(6, new Timestamp(emailDto.getCreationDate().getMillis())); 
          statement.setInt(7, emailDto.getMaxKeywordCount()); 
          statement.setArray(8, connection.createArrayOf("varchar", foo)); 

          return statement; 
         } 
         }, keyHolder); 

     if(rowsAffected > 0){ 
      emailDto.setEmailId(keyHolder.getKey().intValue()); 
      result = true; 
     } 
    } catch (Exception e){ 
     throw new RuntimeException(e); 
    } 

    return result; 
}

拋出的錯誤是：

org.springframework.dao.InvalidDataAccessApiUsageException: PreparedStatementCallback; SQL []; null; nested exception is java.sql.SQLFeatureNotSupportedException

幫助？

來源

2013-03-21 JMH

它說類型是不正確的 - 它想要一個了java.sql.Array – JMH 2013-03-21 22:22:38

此鏈接可以幫助你.. [PreparedStatement的SET數組（http://www.java2s.com/Code/Java /Database-SQL-JDBC/PreparedStatementSetArray.htm） – Smit 2013-03-21 22:30:19

不是忘恩負義@Smit，但Spring似乎並不知道oracle，所以我不能導入或使用它...這不是java/spring的內置部分？ – JMH 2013-03-21 22:38:23

如果您決定放棄setArray方法，您可以這樣做。使用您自己的邏輯將數組轉換爲字符串。無論如何，您將它存儲在varchar中，因此您必須「平整」陣列。

String[] foo = {"A","B"}; 
    StringBuilder sb = new StringBuilder(); 
    for (String bar : foo) { 
     sb.append(bar); 
     sb.append("\t"); 
    } 
    statement.setArray(8, sb.toString());

來源

2013-03-30 03:35:41 Jess

添加數組時出現PreparedStatment錯誤

回答

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