spring4 配置json *.html 出现HTTP 406问题

引起原因：

1. spring4.x中原请求servlet-mapping为/ 拦截所有请求

2. 需要修改为*.html,需使用spring4.x

3. 重现： 原本是直接修改servlet-mapping /改位*.html

4. 结果：修改为*.html过后 请求无法正常发挥Json,一直报错htpp 406 无法接受的请求头

寻找问题并解决过程：

• 发现spring-servlet.xml的xsi原始指向位spring3.x 果断修改为4.x 后来干脆直接删掉后缀，如下：

<beans xmlns="http://www.springframework.org/schema/beans"
    xmlns:context="http://www.springframework.org/schema/context" xmlns:p="http://www.springframework.org/schema/p"
    xmlns:mvc="http://www.springframework.org/schema/mvc" xmlns:util="http://www.springframework.org/schema/util"
    xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:tx="http://www.springframework.org/schema/tx"
    xsi:schemaLocation="http://www.springframework.org/schema/beans
      http://www.springframework.org/schema/beans/spring-beans.xsd
      http://www.springframework.org/schema/context  
      http://www.springframework.org/schema/context/spring-context.xsd  
      http://www.springframework.org/schema/mvc  
      http://www.springframework.org/schema/mvc/spring-mvc.xsd
      http://www.springframework.org/schema/util
      http://www.springframework.org/schema/util/spring-util.xsd
      http://www.springframework.org/schema/tx
      http://www.springframework.org/schema/tx/spring-tx.xsd">

仍然不能解决。

• google,baidu一堆，发现spring3.x和spring4.x所使用的jar包依赖，以及配置不尽相同，最后尝试了很多版本 比如：
  1.stackoverflow

<!-- activates annotation driven binding -->
<mvc:annotation-driven ignoreDefaultModelOnRedirect="true" validator="validator">
    <mvc:message-converters>
        <bean class="org.springframework.http.converter.ResourceHttpMessageConverter"/>
        <bean class="org.springframework.http.converter.xml.Jaxb2RootElementHttpMessageConverter"/>
        <bean class="org.springframework.http.converter.json.MappingJacksonHttpMessageConverter"/>
    </mvc:message-converters>
</mvc:annotation-driven>

@RequestMapping(value = "/your_url", method = RequestMethod.GET, produces = "application/json")
@ResponseBody

2.ifo

<mvc:annotation-driven>
        <mvc:message-converters register-defaults="true">
            <!-- 避免IE执行AJAX时,返回JSON出现下载文件 -->
            <bean id="fastJsonHttpMessageConverter" class="com.alibaba.fastjson.support.spring.FastJsonHttpMessageConverter">
                <property name="supportedMediaTypes">
                    <list>
                        <value>application/json;charset=UTF-8</value>
                    </list>
                </property>
            </bean>
        </mvc:message-converters>
    </mvc:annotation-driven>

3.csdn

    <!-- 这里处理 json 的转换 -->
    <bean id="mappingJacksonHttpMessageConverter"
        class="org.springframework.http.converter.json.MappingJacksonHttpMessageConverter">
        <property name="supportedMediaTypes">
            <list>
                <value>application/json;charset=UTF-8</value>
                <value>text/html;charset=UTF-8</value>
            </list>
        </property>
    </bean>

配合

            <groupId>org.codehaus.jackson</groupId>
            <artifactId>jackson-mapper-asl</artifactId>
            <version>1.9.13</version>
        </dependency>

    **这里的配置在spring3.x是可用的，按理在spring4.x为弃用，但后来同事证明他目前的dubbo使用的就是此种配置，后来我试了试，虽然使用/配置servlet-mapping可用，但一旦配置为*.html，便会同样出现406错误**

解决问题：
经过一番折腾，发现
1. spring4.x 在处理Json的时候 同spring3.x并不相同
2. spring4.x 依赖jar以及配置都需要作调整

---

结果如下

• pom.xml
  1.spring3.x

     <dependency>
            <groupId>org.codehaus.jackson</groupId>
            <artifactId>jackson-mapper-asl</artifactId>
            <version>1.9.13</version>
        </dependency>

  2.spring4.x

<dependency>
            <groupId>com.fasterxml.jackson.core</groupId>
            <artifactId>jackson-databind</artifactId>
            <version>2.6.3</version>
        </dependency>
        <dependency>
            <groupId>com.fasterxml.jackson.core</groupId>
            <artifactId>jackson-core</artifactId>
            <version>2.6.3</version>
        </dependency>
        <dependency>
            <groupId>com.fasterxml.jackson.core</groupId>
            <artifactId>jackson-annotations</artifactId>
            <version>2.6.3</version>
        </dependency>

• spring-servlet.xml
  1.spring3.x

    <bean id="mappingJacksonHttpMessageConverter"
        class="org.springframework.http.converter.json.MappingJacksonHttpMessageConverter">
        <property name="supportedMediaTypes">
            <list>
                <value>application/json;charset=UTF-8</value>
                <value>text/html;charset=UTF-8</value>
            </list>
        </property>
    </bean>

注：这个在spring4.x中也可以使用，但不能修改servlet-mapping为.html 否则会报错http 406
2. spring4.x

<!-- 启动注解驱动的Spring MVC功能，注册请求url和注解POJO类方法的映射 -->
    <mvc:annotation-driven content-negotiation-manager="contentNegotiationManager"/>
    <bean id="contentNegotiationManager" class="org.springframework.web.accept.ContentNegotiationManagerFactoryBean">
        <property name="favorPathExtension" value="false" />
    </bean>
    <bean id="jsonConverter" class="org.springframework.http.converter.json.MappingJackson2HttpMessageConverter"></bean>

    <bean id="stringConverter"
          class="org.springframework.http.converter.StringHttpMessageConverter">
        <property name="supportedMediaTypes">
            <list>
                <value>text/plain;charset=UTF-8</value>
            </list>
        </property>
    </bean>