SpringMVC自定义类型转换器(日期格式)模板

创建一个转换类

要继承一个Converter类,才能定义

import org.springframework.core.convert.converter.Converter;
import java.text.ParseException;
import java.text.SimpleDateFormat;
import java.util.Date;

public class StringToDateConverter implements Converter<String, Date> {
     
    @Override
    public Date convert(String s) {
     
        try {
     
            return new SimpleDateFormat("yyyy-MM-dd").parse(s);
        } catch (ParseException e) {
     
            e.printStackTrace();
        }
        return null;

    }
}

配置到spring-mvc.xml中

    
<beans xmlns="http://www.springframework.org/schema/beans"
       xmlns:mvc="http://www.springframework.org/schema/mvc"
       xmlns:context="http://www.springframework.org/schema/context"
       xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
       xsi:schemaLocation="
        http://www.springframework.org/schema/beans
        http://www.springframework.org/schema/beans/spring-beans.xsd
        http://www.springframework.org/schema/context
        http://www.springframework.org/schema/context/spring-context.xsd
        http://www.springframework.org/schema/mvc
        http://www.springframework.org/schema/mvc/spring-mvc.xsd">


    <context:component-scan base-package="com.itheima.controller"/>

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

    <bean id="conversionServiceFactoryBean" class="org.springframework.context.support.ConversionServiceFactoryBean">
        <property name="converters">
            <set>
                <bean class="com.itheima.converter.StringToDateConverter"/>
            set>
        property>
    bean>
beans>

注解方式

只需在要再要转换的类型上加上一个
@DateTimeFormat(pattern = “yyyy-MM-dd”)
如下:

	@DateTimeFormat(pattern = "yyyy-MM-dd")
    private Date ser;