Spring类型转换 ConversionSerivce Convertor解析

import java.text.ParseException;
import java.util.Date;
import org.apache.commons.lang.time.DateUtils;
import org.springframework.core.convert.converter.Converter;
public class String2DateConverter implements Converter<String, Date> {
private String format = "yyyy-MM-dd";
public void setFormat(String format){
this.format = format;
}
@Override
public Date convert(String arg0) {
try {
return DateUtils.parseDate(arg0, new String[] { format });
} catch (ParseException e) {
return null;
}
}
}

<bean id="conversionService" class="org.springframework.context.support.ConversionServiceFactoryBean">
<property name="converters">
<list>
<bean class="com.xxx.String2DateConverter"/>
</list>
</property>
</bean>