spring-data-jdbc布尔列映射到char

Question

我正在尝试使用[spring-data-jdbc]保留布尔列，但转换默认为'TRUE'，'FALSE'值，但数据库列为char（1）（'T'/'F'） ：

2018-07-13 14:58:32.761 [main] DEBUG org.springframework.jdbc.support.SQLErrorCodeSQLExceptionTranslator - Translating SQLException with SQL state '22001', error code '22001', message [Valor demasiado largo para la columna "FLAG CHAR(1) NOT NULL": "'FALSE' (5)"
Value too long for column "OCCUPATION_FLAG CHAR(1) NOT NULL": "'FALSE' (5)"; SQL statement:
INSERT INTO MY_TABLE (description, flag, code) VALUES (?, ?, ?) [22001-197]]; SQL was [INSERT INTO MY_TABLE (description, flag, code) VALUES (?, ?, ?)] for task [PreparedStatementCallback]

我正在尝试创建一些转换器，但仍然失败。

@Bean
public Converter<Boolean, Character> booleanToCharacter() {
    return new Converter<Boolean, Character>() {

        @Override
        public Character convert(Boolean source) {
            if (null==source) { return (Character)null;}
            return source.toString().toUpperCase().charAt(0);
        }
    };
}

@Bean
public Converter<Character, Boolean> characterToBoolean() {
    return new Converter<Character, Boolean>() {

        @Override
        public Boolean convert(Character source) {
            if (null==source) { return (Boolean)null; };
            return 'T'==Character.toUpperCase(source);
        }

    };
}

任何建议都会有用。谢谢。