1. 下載依賴包

http://mvnrepository.com/artifact/com.fasterxml.jackson.core/jackson-databind
http://mvnrepository.com/artifact/com.fasterxml.jackson.core/jackson-core
http://mvnrepository.com/artifact/com.fasterxml.jackson.core/jackson-annotations

2. 修改 dispatcher-servlet.xml

<mvc:annotation-driven/>
<mvc:default-servlet-handler/>
 

<mvc:annotation-driven>
    <mvc:message-converters>
        <bean class="org.springframework.http.converter.StringHttpMessageConverter"/>
        <bean class="org.springframework.http.converter.json.MappingJackson2HttpMessageConverter"/>
    </mvc:message-converters>
</mvc:annotation-driven>
 

SpringMVC 添加 RestController 支持