Java 将XML作为CLOB传递给Oracle会导致“ORA-22922:不存在LOB值”错误

我正在构建一个web服务，它在负载中获取一个输入XML并将其存储在数据库中

在DAO层中，我使用XML字符串创建clob对象，如下所示：

CLOB clob = CLOB.createTemporary(conn,false,CLOB.MODE_READWRITE);
            clob.putString(1,inputXml);

我将此clob对象传递给存储过程：

declareParameter(new SqlParameter("i_xml", OracleTypes.CLOB));

在可执行方法中：

params.put("i_xml",clob);       
Map<?, ?> result = execute(params);

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请让我知道如何解决这个问题。提前感谢。

准备好的语句应该是OracleCallableStatement类型，然后按照下面的示例代码进行操作

        stmt = (OracleCallableStatement) conn.prepareCall("{call MSG(" + repeatQmarks(7) + ")}");
        stmt.setBigDecimal("P_W_EVENT_LOG_KEY", wEventLogKey); //1      P_W_EVENT_LOG_KEY   IN     NUMBER,
        stmt.setString("P_DOMAIN", domain); //2      P_DOMAIN            IN     VARCHAR2,
        stmt.setString("P_EXCPT_CD", sqlExCd); //3      P_EXCPT_CD          IN     VARCHAR2,
        stmt.setString("P_EXCPT_MSG", sqlExMsg); //4      P_EXCPT_MSG         IN     VARCHAR2,
        stmt.setStringForClob("P_PAYLOAD_IN", "My TEST CLOB 1"); //5      P_PAYLOAD_IN        IN     CLOB DEFAULT NULL,
        stmt.setStringForClob("P_PAYLOAD_OUT", "My TEST CLOB 2"); //6      P_PAYLOAD_OUT       IN     CLOB DEFAULT NULL,
        stmt.registerOutParameter("P_RET_CD", java.sql.Types.NUMERIC); //7      P_RET_CD               OUT NUMBER);

注意，对于该方法，5和6参数实际上是字符串

setStringForClob

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这可能会对您有所帮助。您还应该了解LOB读取一致性，并确保避免在过程中进行提交或回滚。CLOB.createTemporary的第三个参数应该是CLOB.DURATION\u CALL或CLOB.DURATION\u SESSION。

        stmt = (OracleCallableStatement) conn.prepareCall("{call MSG(" + repeatQmarks(7) + ")}");
        stmt.setBigDecimal("P_W_EVENT_LOG_KEY", wEventLogKey); //1      P_W_EVENT_LOG_KEY   IN     NUMBER,
        stmt.setString("P_DOMAIN", domain); //2      P_DOMAIN            IN     VARCHAR2,
        stmt.setString("P_EXCPT_CD", sqlExCd); //3      P_EXCPT_CD          IN     VARCHAR2,
        stmt.setString("P_EXCPT_MSG", sqlExMsg); //4      P_EXCPT_MSG         IN     VARCHAR2,
        stmt.setStringForClob("P_PAYLOAD_IN", "My TEST CLOB 1"); //5      P_PAYLOAD_IN        IN     CLOB DEFAULT NULL,
        stmt.setStringForClob("P_PAYLOAD_OUT", "My TEST CLOB 2"); //6      P_PAYLOAD_OUT       IN     CLOB DEFAULT NULL,
        stmt.registerOutParameter("P_RET_CD", java.sql.Types.NUMERIC); //7      P_RET_CD               OUT NUMBER);