Springmvc需要如下配置:
1.开启注解
<!-- 开启注解-->
<mvc:annotation-driven />
2.加入相关bean
<bean class="org.springframework.web.servlet.mvc.annotation.AnnotationMethodHandlerAdapter">
<property name="messageConverters">
<list>
<ref bean="jsonHttpMessageConverter" />
</list>
</property>
</bean>
<bean id="jsonHttpMessageConverter" class="org.springframework.http.converter.json.MappingJackson2HttpMessageConverter">
<property name="supportedMediaTypes">
<list>
<value>application/json;charset=UTF-8</value>
</list>
</property>
</bean>
3.maven加入jackson依赖
<dependency>
<groupId>com.fasterxml.jackson.core</groupId>
<artifactId>jackson-core</artifactId>
<version>2.5.2</version>
</dependency>
<dependency>
<groupId>com.fasterxml.jackson.core</groupId>
<artifactId>jackson-databind</artifactId>
<version>2.5.2</version>
</dependency>
4.controller层入参要加注解@RequestBody
必须是个类啊啊啊啊,不能用HttpServletRequest了,它不是个json
@RequestBody 接受对象里面,如果已经有了非空构造函数,那么它同时必须要有默认的空构造函数,注意这个构造函数一定要为空