Spring doesn't use my Conerverter. Why? - spring

Question

I have custom Converter:
public class DateTimeConverter implements Converter<String, DateTime> {
private static final String DEFAULT_DATE_PATTERN = "yyyy-MM-dd HH:mm:ss";
private DateTimeFormatter formatter;
private String datePattern = DEFAULT_DATE_PATTERN;
public String getDatePattern() {
return datePattern;
}
#Autowired(required = false)
public void setDatePattern(String datePattern) {
this.datePattern = datePattern;
}
#PostConstruct
public void init() {
formatter = DateTimeFormat.forPattern(datePattern);
}
#Override
public DateTime convert(String source) {
if (source == null) return new DateTime();
return formatter.parseDateTime(source);
}
}
And field in JavaBean:
#NotNull
#Column(name = "dateandtime")
private DateTime dateAndTime;
I registered my converter in setting:
<mvc:annotation-driven conversion-service="conversionService"/>
<bean id="conversionService"
class="org.springframework.context.support.ConversionServiceFactoryBean">
<property name="converters">
<list>
<bean class="com.myapp.util.DateTimeConverter"/>
</list>
</property>
</bean>
I got this exception:
Failed to convert property value of type 'java.lang.String' to required type 'org.joda.time.DateTime' for property 'dateAndTime'; nested exception is java.lang.IllegalStateException: Cannot convert value of type [java.lang.String] to required type [org.joda.time.DateTime] for property 'dateAndTime': no matching editors or conversion strategy found
Test:
#RunWith(SpringJUnit4ClassRunner.class)
#ContextConfiguration("file:src/main/resources/spring/business-config.xml")
public class JdbcTransactionRepositoryImplTest extends TestCase {
private static final Logger logger = Logger.getLogger(JdbcTransactionRepositoryImplTest.class);
#Autowired
private ApplicationContext context;
private JdbcTransactionRepositoryImpl transactionRepository;
#Before
public void setup() {
transactionRepository = new JdbcTransactionRepositoryImpl((DataSource) context.getBean("dataSource"));
}
#Test
public void testFindById() throws Exception {
Transaction tr1 = transactionRepository.findById(1);
assertEquals(new Long(1L), tr1.getId());
}
But, in this case:
#Test
public void testFindById() throws Exception {
ConversionService conversionService = (ConversionService) context.getBean("conversionService");
assertTrue(conversionService.canConvert(String.class, DateTime.class));
Build success!
I don't understand: why?
Thank you for any help

Answer 1

You don't have to create your own converter or register conversion service - if Joda-Time is in project's classpath, Spring will automagically enable conversions through #DateTimeFormat annotation (<mvc:annotation-driven /> is required).
So what you need is just:
#NotNull
#DateTimeFormat(pattern = "yyyy-MM-dd HH:mm:ss")
private DateTime dateAndTime;