在SpringMVC中配置消息转换器和三方消息转换器

Love The Way You Lie 2022-03-16 09:18 213阅读 0赞

### 已过时的配置方式：AnnotationMethodHandlerAdapter ###

[https://blog.csdn.net/dailingnan0827/article/details/54928552][https_blog.csdn.net_dailingnan0827_article_details_54928552]

<bean
          class="org.springframework.web.servlet.mvc.annotation.AnnotationMethodHandlerAdapter">
            <property name="messageConverters">
                <list>
                	<bean class="org.springframework.http.converter.json.MappingJackson2HttpMessageConverter"></bean>
                   
                </list>
            </property>
        </bean>

![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3dlaXhpbl80MjQ2NTEyNQ_size_16_color_FFFFFF_t_70][]

### 现在使用的配置方式：RequestMappingHandlerAdapter ###

[https://www.cnblogs.com/qinglangyijiu/p/7742344.html][https_www.cnblogs.com_qinglangyijiu_p_7742344.html]

<bean class="org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter">
      <property name="messageConverters">
       <list >
          <ref bean="mappingJacksonHttpMessageConverter" />
       </list>
      </property>
     </bean>
     <bean id="mappingJacksonHttpMessageConverter"
      class="org.springframework.http.converter.json.MappingJackson2HttpMessageConverter">
      <property name="supportedMediaTypes">
       <list>
        <value>text/html;charset=UTF-8</value>
       </list>
      </property>
     </bean>

或者使用这种方式：

<mvc:annotation-driven>
            <mvc:message-converters>
                <ref bean="stringHttpMessageConverter"/>
                <ref bean="mappingJackson2HttpMessageConverter"/>
            </mvc:message-converters>
        </mvc:annotation-driven>
    
    <bean id="stringHttpMessageConverter"
              class="org.springframework.http.converter.StringHttpMessageConverter"/>
    
        
    <bean id="mappingJackson2HttpMessageConverter"
             class="org.springframework.http.converter.json.MappingJackson2HttpMessageConverter">
            <property name="supportedMediaTypes">
                <list>
                    <value>text/html;charset=UTF-8</value>
                </list>
            </property>
    </bean>

###  使用三方的消息转换器\[fastJson\]： ###

[https://blog.csdn.net/u014520745/article/details/73147702][https_blog.csdn.net_u014520745_article_details_73147702]

<mvc:annotation-driven>
        
        <mvc:message-converters register-defaults="false">
            
            <bean class="org.springframework.http.converter.StringHttpMessageConverter" />
    
            <bean class="org.springframework.http.converter.support.AllEncompassingFormHttpMessageConverter" />
    
            <bean class="org.springframework.http.converter.ByteArrayHttpMessageConverter" />
    
            <bean class="org.springframework.http.converter.BufferedImageHttpMessageConverter" />
    
            
            <bean id="fastJsonHttpMessageConverter" class="com.alibaba.fastjson.support.spring.FastJsonHttpMessageConverter4" >
                
                <property name="supportedMediaTypes">
                    <list>
                        
                        <value>text/html;charset=UTF-8</value>
                        <value>application/json;charset=UTF-8</value>
                    </list>
                </property>
            </bean>
        </mvc:message-converters>
    </mvc:annotation-driven>

[https://blog.csdn.net/yfisaboy/article/details/31755631][https_blog.csdn.net_yfisaboy_article_details_31755631]

### 新增一个关于日期消息转换的转化器,然后注册给Spring ###

想自定义其他的消息转换器，可以继承更加通用的抽象接口AbstractHttpMessageConverter

[https://www.cnblogs.com/fingerboy/p/7753577.html][https_www.cnblogs.com_fingerboy_p_7753577.html]

[https://www.cnblogs.com/zfding/p/8322382.html][https_www.cnblogs.com_zfding_p_8322382.html]

[https://blog.csdn.net/z69183787/article/details/78654678][https_blog.csdn.net_z69183787_article_details_78654678]

日期转换方式一【缺点是每个日期属性可能都需要去配置，优点就是简单】：

使用@JsonFormat注解，如下面的例子

class User implements Serializable {
        
        @JsonFormat(pattern = "yyyy-MM-dd HH:mm:ss", timezone = "GMT+8")
        @JsonInclude(value = Include.NON_NULL)
        private Date birthday;
        //...
    }

日期转换方式二【一次配置全局使用，复杂点】：

public class XXXMappingJackson2HttpMessageConverter extends MappingJackson2HttpMessageConverter {
    
        public XXXMappingJackson2HttpMessageConverter() {
            this.objectMapper.configure(SerializationFeature.WRITE_DATES_AS_TIMESTAMPS, false);
            this.objectMapper.setDateFormat(new SimpleDateFormat("yyyy-MM-dd HH:mm:ss"));
            this.objectMapper.setSerializationInclusion(JsonInclude.Include.NON_NULL);
        }
    }

<mvc:annotation-driven>
         <mvc:message-converters>
              <bean class="cn.xxx.XXXMappingJackson2HttpMessageConverter"/>
         </mvc:message-converters>
    </mvc:annotation-driven>

或者这样配置：

日志转换方式三： 或者直接在MappingJackson2HttpMessageConverter指定日期格式转换格式【一次配置全局使用，复杂点】

<mvc:annotation-driven>
    		<mvc:message-converters>
    			<bean
    				class="org.springframework.http.converter.json.MappingJackson2HttpMessageConverter">
    				<property name="objectMapper">
    					<bean class="com.fasterxml.jackson.databind.ObjectMapper">
    						<property name="dateFormat"> <bean class="java.text.SimpleDateFormat"> 
    							<constructor-arg type="java.lang.String" value="yyyy-MM-dd HH:mm:ss" /> </bean> 
    						</property>
    						<property name="serializationInclusion">
    							<value
    								type="com.fasterxml.jackson.annotation.JsonInclude.Include">NON_NULL</value>
    						</property>
    					</bean>
    				</property>
    			</bean>
    	</mvc:message-converters>
    </mvc:annotation-driven>

### 扩展：在SpringBoot中的配置： ###

apllication.property文件：
    spring.jackson.date-format=yyyy-MM-dd HH:mm:ss
    spring.jackson.time-zone=GMT+8
    
    
    apllication.yml文件：
    spring:
      jackson:
        date-format: yyyy-MM-dd HH:mm:ss
        time-zone: GMT+8

配置FastJSON在SpringBoot中：

@Bean
    public HttpMessageConverters fastJsonHttpMessageConverters() {
    	// 1、需要先定义一个 convert 转换消息的对象;
    	FastJsonHttpMessageConverter fastConverter = new FastJsonHttpMessageConverter();
    	
    	//2、添加fastJson 的配置信息，比如：是否要格式化返回的json数据;
    	FastJsonConfig fastJsonConfig = new FastJsonConfig();
    	fastJsonConfig.setSerializerFeatures(SerializerFeature.PrettyFormat);
    	
    	//3、在convert中添加配置信息.
    	fastConverter.setFastJsonConfig(fastJsonConfig);
    	
    	HttpMessageConverter<?> converter = fastConverter;
    	return new HttpMessageConverters(converter);
    }

\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\* 不积跬步无以至千里，不积小流无以成江海 \*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*

[https_blog.csdn.net_dailingnan0827_article_details_54928552]: https://blog.csdn.net/dailingnan0827/article/details/54928552
[watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3dlaXhpbl80MjQ2NTEyNQ_size_16_color_FFFFFF_t_70]: /images/20220316/4687817c8de64f019db3864514dc4c4e.png
[https_www.cnblogs.com_qinglangyijiu_p_7742344.html]: https://www.cnblogs.com/qinglangyijiu/p/7742344.html
[https_blog.csdn.net_u014520745_article_details_73147702]: https://blog.csdn.net/u014520745/article/details/73147702
[https_blog.csdn.net_yfisaboy_article_details_31755631]: https://blog.csdn.net/yfisaboy/article/details/31755631
[https_www.cnblogs.com_fingerboy_p_7753577.html]: https://www.cnblogs.com/fingerboy/p/7753577.html
[https_www.cnblogs.com_zfding_p_8322382.html]: https://www.cnblogs.com/zfding/p/8322382.html
[https_blog.csdn.net_z69183787_article_details_78654678]: https://blog.csdn.net/z69183787/article/details/78654678