SpringMVC自定义类型转换器并开启

import org.springframework.core.convert.converter.Converter;
 
import java.text.DateFormat;
import java.text.ParseException;
import java.text.SimpleDateFormat;
import java.util.Date;
 
public class StringToDate implements Converter<String, Date> {
    @Override
    public Date convert(String s) {
        if(s==null){
            System.out.println("请输入正确类型");
        }
        DateFormat df=new SimpleDateFormat("yyy-MM-dd");
        try {
            Date parse = df.parse(s);
            return parse;
        } catch (ParseException e) {
            e.printStackTrace();
        }
        return null;
    }
}

<!--    配置自定义类型转换器-->
    <bean id="conversionService" class="org.springframework.context.support.ConversionServiceFactoryBean">
        <property name="converters">
            <set>
                <bean class="cn.itcast.untils.StringToDate"></bean>
            </set>
        </property>
    </bean>

<mvc:annotation-driven conversion-service="conversionService"></mvc:annotation-driven>