背景

需要一套幹凈的Spring+Spring MVC+Mybatis框架，框架寫到返回Json的環節報錯了。

問題

無法Json，報406

解決

需要配置Json工具包，這裏用Jackson

Maven Jackson

        <!-- https://mvnrepository.com/artifact/com.fasterxml.jackson.core/jackson-core -->
        <dependency>
            <groupId>com.fasterxml.jackson.core</groupId>
            <artifactId>jackson-core</artifactId>
            <version>2.6.0</version>
        </dependency>
        <!-- https://mvnrepository.com/artifact/com.fasterxml.jackson.core/jackson-annotations -->
        <dependency>
            <groupId>com.fasterxml.jackson.core</groupId>
            <artifactId>jackson-annotations</artifactId>
            <version>2.6.0</version>
        </dependency>
        <!-- https://mvnrepository.com/artifact/com.fasterxml.jackson.core/jackson-databind -->
        <dependency>
            <groupId>com.fasterxml.jackson.core</groupId>
            <artifactId>jackson-databind</artifactId>
            <version>2.6.0</version>
        </dependency>

工程環境SpringMvc 4.x，不兼容Jackson2.9最新版。這裏特應用2.6版本

Spring Mvc配置

    <!--Begin:使用Jackson 2.x的配置，需要導入的jar包：jackson-core-xxx.jar、jackson-annotations-xxx.jar、jackson-databind-xxx.jar-->
    <!--通過處理器映射DefaultAnnotationHandlerMapping來開啟支持@Controller註解-->
    <bean class="org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerMapping" />
    <!--通過處理器適配器AnnotationMethodHandlerAdapter來開啟支持@RequestMapping註解-->
    <bean class="org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter">
        <property name="messageConverters">
            <list>
                <!-- 設置返回字符串編碼 -->
                <bean class="org.springframework.http.converter.StringHttpMessageConverter">
                    <property name = "supportedMediaTypes">
                        <list>
                            <value>text/html;charset=UTF-8</value>
                            <value>application/json;charset=UTF-8</value>
                        </list>
                    </property>
                </bean>
                <!-- json轉換器 -->
                <bean class="org.springframework.http.converter.json.MappingJackson2HttpMessageConverter">
                    <property name="supportedMediaTypes">
                        <list>
                            <value>text/html;charset=UTF-8</value>
                            <value>application/json;charset=UTF-8</value>
                        </list>
                    </property>
                </bean>
            </list>
        </property>
    </bean>
    <!--End:使用Jackson 2.x的配置，需要導入的jar包：jackson-core-xxx.jar、jackson-annotations-xxx.jar、jackson-databind-xxx.jar-->

好了，重啟不報錯（一般就是jar寶沖突），[email protected]

以上配置，帶來好運，祝好 ！

by.沫沫金

我得純凈框架，新模塊只需要一個Controller就可以，CRUD一句話全搞定。前臺專註Form就行。

本文出自 “沫沫金的IT心得與技巧” 博客，請務必保留此出處http://zl0828.blog.51cto.com/2242565/1954239

SpringMVC返回Json失敗，請檢查是否配置了Jackson