springmvc使用配置文件

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建立src/main/webapp/WEB-INF/web.xml 添加servlet

<?xml version="1.0" encoding="UTF-8"?>
<web-app xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"

     xmlns="http://xmlns.jcp.org/xml/ns/javaee"
     xsi:schemaLocation="http://xmlns.jcp.org/xml/ns/javaee

http://xmlns.jcp.org/xml/ns/javaee/web-app_4_0.xsd"

     version="4.0">
<!--添加DispatcherServlet类-->
<servlet>
    <servlet-name>smvc</servlet-name>
    <servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>
    <!-- 配置springmvc配置文件位置 默认在WEB-INF下-->
    <init-param>
        <param-name>contextConfigLocation</param-name>
        <param-value>classpath*:smvc.xml</param-value>
    </init-param>
</servlet>
<servlet-mapping>
    <servlet-name>smvc</servlet-name>
    <url-pattern>/*</url-pattern>
</servlet-mapping>

然后在resource下创建smvc.xml文件此文件中配置消息转换器等 相当于AppConfig类

<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"

   xmlns:context="http://www.springframework.org/schema/context"
   xmlns:mvc="http://www.springframework.org/schema/mvc"
   xmlns="http://www.springframework.org/schema/beans"
   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="cn.chenxiejia"/>
<!--静态资源访问-->
<mvc:resources mapping="/static/*.*" location="/static/"/>
<mvc:resources mapping="/imgs/*.*" location="/imgs/"/>
<mvc:annotation-driven>
    <mvc:message-converters register-defaults="true">
        <!--普通字符串编-->
        <bean name="string" class="org.springframework.http.converter.StringHttpMessageConverter">
            <property name="supportedMediaTypes" value="text/html;charset=utf-8"/>
        </bean>
        <!--时间日期类编码 继承ObjectMapper 用到jackson组件-->
        <bean class="org.springframework.http.converter.json.MappingJackson2HttpMessageConverter">
            <property name="objectMapper">
                <!--                    此类为自己继承ObjectMapper类 此类中具体配置日期格式-->
                <bean class="cn.chenxiejia.message.CustomObjectMapper"/>
            </property>
            <property name="defaultCharset" value="utf-8"/>
        </bean>
    </mvc:message-converters>
</mvc:annotation-driven>
<!--视图处理-->
<bean class="org.springframework.web.servlet.view.InternalResourceViewResolver">
    <!--前缀 就是文件夹位置-->
    <property name="prefix" value="/WEB-INF/static/"/>
    <!--后缀 就是文件类型-->
    <property name="suffix" value=".html"/>
</bean>

CustomObjectMapper类

public class CustomObjectMapper extends ObjectMapper {

public CustomObjectMapper() {
    //转换java.util.Date类
    SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");
    this.setDateFormat(sdf);

    //转换jdk1.8新的日期类
    JavaTimeModule m = new JavaTimeModule();
    m.addSerializer(LocalDateTime.class, new LocalDateTimeSerializer(DateTimeFormatter.ofPattern("yyyy-MM-dd HH:mm:ss")));
    m.addDeserializer(LocalDateTime.class, new LocalDateTimeDeserializer(DateTimeFormatter.ofPattern("yyyy-MM-dd HH:mm:ss")));
    m.addSerializer(LocalTime.class, new LocalTimeSerializer(DateTimeFormatter.ofPattern("HH:mm:ss")));
    m.addDeserializer(LocalTime.class, new LocalTimeDeserializer(DateTimeFormatter.ofPattern("HH:mm:ss")));
    m.addSerializer(LocalDate.class, new LocalDateSerializer(DateTimeFormatter.ofPattern("yyyy-MM-dd")));
    m.addDeserializer(LocalDate.class, new LocalDateDeserializer(DateTimeFormatter.ofPattern("yyyy-MM-dd")));
    this.registerModule(m);
}

}
其他的同无配置方式

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