Java JsonParseException:从Oracle 11g中读取JSON的意外字符

时间:2017-03-03 18:29:14

标签: java json oracle11g jackson deserialization

我们将一些数据保存在Oracle 11g的CLOB列中作为序列化JSON。之后,这些数据被回读并反序列化。但是在某些情况下,反序列化失败了(使用Jackson)。

 Failed to deserialize emvData JSON into HashMap. EMVData -> weblogic.jdbc.wrapper.Clob_oracle_sql_CLOB@1e52cd
com.fasterxml.jackson.core.JsonParseException: Unexpected character ('w' (code 119)): expected a valid value (number, String, array, object, 'true', 'false' or 'null')
 at [Source: java.io.StringReader@56c70524; line: 1, column: 2]

事情是没有' w'它试图反序列化的JSON中的任何字符。我怀疑它可能是一个字符编码问题... Oracle 11g服务器正在使用AL32UTF8。

这是进行序列化的代码:

public String serializeEMVData(Map<String, String> emvData) {

    ObjectMapper objectMapper = new ObjectMapper();
    if (emvData != null) {
        try {
            return objectMapper.writeValueAsString(emvData);
        } catch (JsonProcessingException ex) {
            logger.error("Failed to serialize EMV data as JSON", ex);
        }
    }
    return null;
}

这是进行反序列化的代码

public static Map<String, String> deserializeEMVData(String serializedEmvData) {


        HashMap<String, String> emvData = null;
        if (serializedEmvData != null) {
            ObjectMapper objectMapper = new ObjectMapper();
            try {
                emvData = objectMapper.readValue(serializedEmvData, HashMap.class);
            } catch (IOException e) {
                logger.error("Failed to deserialize emvData JSON into HashMap. EMVData -> " + serializedEmvData.toString(), e);
            }
        }
        if (emvData != null) {
            return new TreeMap<String, String>(emvData);
        } else {
            return null;
        }
    }

如何告诉Java字符集是AL32UTF8还是我需要在查询中转换它....

1 个答案:

答案 0 :(得分:0)

您是否正确地将CLOB转换为String? 看起来你正在尝试将CLOB.toString()(即“weblogic.jdbc.wrapper.Clob_oracle_sql_CLOB@1e52cd”)转换为java对象。