注意  请求头必须是content-type application/json 类型

spring文件配置

<bean id="mappingJacksonHttpMessageConverter"
		class="org.springframework.http.converter.json.MappingJackson2HttpMessageConverter">
		<property name="supportedMediaTypes">
			<list>
				<!-- <value>application/json;charset=UTF-8</value> -->
				<value>text/html;charset=UTF-8</value>
			</list>
		</property>
	</bean>
 
	<!-- 启动SpringMVC的注解功能，完成请求和注解POJO的映射 -->
	<bean
		class="org.springframework.web.servlet.mvc.annotation.AnnotationMethodHandlerAdapter">
		<property name="messageConverters">
			<list>
				<ref bean="mappingJacksonHttpMessageConverter" />
				<bean
					class="org.springframework.http.converter.ByteArrayHttpMessageConverter" />
				<bean
					class="org.springframework.http.converter.StringHttpMessageConverter">
					<property name="supportedMediaTypes">
						<list>
							<value>application/json;charset=UTF-8</value>
						</list>
					</property>
				</bean>
				<bean class="org.springframework.http.converter.FormHttpMessageConverter" />
				<bean
					class="org.springframework.http.converter.xml.SourceHttpMessageConverter" />
					
			 <bean  class="org.springframework.http.converter.ResourceHttpMessageConverter"></bean>
            <bean   class="org.springframework.http.converter.ByteArrayHttpMessageConverter"></bean>
                 <bean
                    class="org.springframework.http.converter.xml.XmlAwareFormHttpMessageConverter"></bean>
                <bean
                    class="org.springframework.http.converter.xml.Jaxb2RootElementHttpMessageConverter"></bean>
                <bean
                    class="org.springframework.http.converter.json.MappingJackson2HttpMessageConverter"></bean>
				<!-- JSON转换器 -->
			</list>
		</property>
	</bean>

控制类配置

@SuppressWarnings("unchecked")
	@RequestMapping("/bindOpenIdPhone")
	 public  
	 map  bindOpenIdPhone(@RequestBody  Map<String, Object> params1 ) throws IOException {}

这样不管是接收，还是返回都可以json转对象，，对象转json