SpringMVC-自定义转换器

1.定义转换器类实现Converter接口

import org.springframework.core.convert.converter.Converter;

import java.text.ParseException;
import java.text.SimpleDateFormat;
import java.util.Date;

public class DateConverter implements Converter<String, Date> {
    @Override
    public Date convert(String s) {
        //将日期字符串转为日期对象 返回
        Date date = null;
        SimpleDateFormat format=new SimpleDateFormat("yyyy-MM-dd");
        try {
            date = format.parse(s);

        } catch (ParseException e) {
            e.printStackTrace();
        }
        return date;
    }
}

2.在spring-mvc.xml配置文件中声明转换器

    <!--    声明转换器-->
    <bean id="conversionService2" class="org.springframework.context.support.ConversionServiceFactoryBean">
        <property name="converters">
            <list>
                <bean class="com.hao.converter.DateConverter"></bean>
            </list>
        </property>
    </bean>

3.在< annotation- driven >中引用转换器

<!--注解驱动-->
<!--    conversion-service:引入转换器-->
    <mvc:annotation-driven conversion-service="conversionService2"/>

4.Controller层

  @RequestMapping("/report19")
    @ResponseBody
    public void save19(Date date){
        System.out.println(date);
    }

5.启动tomcat服务器进行测试,访问http://localhost:8080/user/report19?date=2020-10-10