解決spring4.x中的MappingJacksonHttpMessageConverter錯誤

在spring4.x中使用了org.springframework.http.converter.json.MappingJackson2HttpMessageConverter代替舊的MappingJacksonHttpMessageConverter。

並將maven依賴改爲以下：

        <dependency>
            <groupId>com.fasterxml.jackson.core</groupId>
            <artifactId>jackson-core</artifactId>
            <version>2.5.1</version>
        </dependency>
        <dependency>
            <groupId>com.fasterxml.jackson.core</groupId>
            <artifactId>jackson-databind</artifactId>
            <version>2.5.1</version>
        </dependency>

咱們用7-zip去查看spring-web-[version].jar，確實已找不到MappingJacksonHttpMessageConverter這個class了。