Spring(十四) 类型转换器

自定义日期类型转换器:

1.jsp页面:

2.定义一个类:

3.写一个类实现Converter<String,Date>

string,Date原本是S,T,自己改

public class MyConverter implements Converter<String,Date> {

    public Date convert(String str) {
        SimpleDateFormat sdf =  getDate(str);
        try {
            return sdf.parse(str);
        } catch (ParseException e) {
            e.printStackTrace();
        }
        return null;

    }

    private SimpleDateFormat getDate(String str) {
        SimpleDateFormat sdf = new SimpleDateFormat("yyyy年MM月dd日");
        if (Pattern.matches("^\d{4}-\d{1,2}-\d{2}$",str)){
            sdf=new SimpleDateFormat("yyyy-MM-dd");
        }
        if (Pattern.matches("^\d{4}/\d{1,2}/\d{2}$",str)){
            sdf=new SimpleDateFormat("yyyy/MM/dd");
        }
        if (Pattern.matches("^\d{4}\d{1,2}\d{2}$",str)){
            sdf=new SimpleDateFormat("yyyyMMdd");
        }
        return sdf;
    }
}

4.配置文件:

   <context:component-scan base-package="cn.mvc.t16typeconverter"></context:component-scan>
    
    <!--试图解析器-->
    <bean class="org.springframework.web.servlet.view.InternalResourceViewResolver">
        <property name="prefix" value="/day03/"></property>
        <property name="suffix" value=".jsp"></property>
    </bean>
    <!--自定义转换器-->
    <bean id="MyConverter" class="cn.mvc.t16typeconverter.typeconverter.MyConverter"></bean>
    <!--转换服务-->
    <bean id="conversionService" class="org.springframework.context.support.ConversionServiceFactoryBean">
        <property name="converters" ref="MyConverter"></property>
    </bean>
    <!--注解驱动-->
    <mvc:annotation-driven conversion-service="conversionService"></mvc:annotation-driven>
原文地址:https://www.cnblogs.com/a157/p/8694552.html