Spring MVC中日期格式转换的两种实用方法

package cn.tx.demo2;
 
import org.springframework.format.annotation.DateTimeFormat;
import java.io.Serializable;
import java.util.Date;
import java.util.List;
import java.util.Map;
 
public class User implements Serializable {
    // ... 其他属性 ...
    @DateTimeFormat(pattern = "yyyy-MM-dd HH:mm:ss")
    private Date birthday;
    // ... 其他方法 ...
}

package cn.tx.demo2;
 
import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestMethod;
 
@Controller
@RequestMapping("/user")
public class UserController {
    @RequestMapping("/save2.do")
    public String save2(User user) {
        System.out.println("USER:" + user);
        return "suc";
    }
}

<?xml version="1.0" encoding="UTF-8"?>
<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/mvc
        http://www.springframework.org/schema/mvc/spring-mvc.xsd
        http://www.springframework.org/schema/context
        http://www.springframework.org/schema/context/spring-context.xsd">
 
    <!-- 启用注解驱动 -->
    <mvc:annotation-driven/>
 
    <!-- 配置组件扫描 -->
    <context:component-scan base-package="cn.tx.demo1"/>
    <context:component-scan base-package="cn.tx.demo2"/>
 
    <!-- 配置视图解析器 -->
    <bean class="org.springframework.web.servlet.view.InternalResourceViewResolver">
        <property name="prefix" value="/WEB-INF/pages/"/>
        <property name="suffix" value=".jsp"/>
    </bean>
 
    <!--配置日期类型转换器，类型转换器的组件，把日期类型转换注入到组件对象中-->
    <bean id="conversionService" class="org.springframework.context.support.ConversionServiceFactoryBean">
        <property name="converters">
            <set>
                <bean class="cn.tx.demo2.StringToDate" />
            </set>
        </property>
    </bean>
 
    <!--让映射器、适配器和处理器生效(默认不配置也是可以的)-->
    <mvc:annotation-driven conversion-service="conversionService"/>
</beans>

package cn.tx.demo2;
 
import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestMethod;
 
@Controller
@RequestMapping("/user")
public class UserController {
    @RequestMapping("/save3.do")
    public String save3(User user) {
        System.out.println("user：" + user);
        return "suc";
    }
}