spring mvc如何优雅的使用fastjson

1. 在spring mvc中配置fastjson

<!-- 设置配置方案 -->

    <mvc:annotation-driven>

        <!-- 设置不使用默认的消息转换器 -->

        <mvc:message-converters register-defaults="false">

            <!-- 配置Spring的转换器, 字符编码 -->

            <bean class="org.springframework.http.converter.StringHttpMessageConverter">

                <constructor-arg value="UTF-8" index="0"/>

                <property name="supportedMediaTypes">

                    <list>

                        <value>text/plain;charset=UTF-8</value>

                    </list>

                </property>

            </bean>

            <bean class="org.springframework.http.converter.xml.XmlAwareFormHttpMessageConverter"/>

            <bean class="org.springframework.http.converter.ByteArrayHttpMessageConverter"/>

            <bean class="org.springframework.http.converter.BufferedImageHttpMessageConverter"/>

            <!--配置fastjson中实现HttpMessageConverter接口的转换器-->

            <bean id="fastJsonHttpMessageConverter"

                  class="com.alibaba.fastjson.support.spring.FastJsonHttpMessageConverter">

                <!-- 加入支持的媒体类型：返回contentType -->

                <property name="supportedMediaTypes">

                    <list>

                        <!-- 这里顺序不能反，一定先写text/html,不然ie下会出现下载提示 -->

                        <value>text/html;charset=UTF-8</value>

                        <value>application/json;charset=UTF-8</value>

                    </list>

                </property>

                <!--枚举类型，对于返回List集合中引用同一个对象，忽略引用检测【注意不要出现循环引用现象】-->

                <property name="features">

                    <list>

                        <value>DisableCircularReferenceDetect</value>

                    </list>

                </property>

            </bean>

        </mvc:message-converters>

    </mvc:annotation-driven>

2. 使用方法

    // 文章details

    @RequestMapping(value = "/detail", method = RequestMethod.GET)

    public String detail(Long id, Model model, HttpServletRequest request){

        Article article = articleService.getArticleById(id, request);

        Teacher teacher = (Teacher) request.getSession().getAttribute("teacher");

        if(teacher==null){

            return "login.jsp";

        }

        // role : 1-teacher

        ArticleZan zan = articleService.getZan(article.getArticle_id(), 1, teacher.getTe_id());

        model.addAttribute("article", article);

        model.addAttribute("zan",zan);

        return "article/detail.jsp";

    }

　　{"id":1}  ->可以完成参数疯转

　　

　　对于普通的参数，fastjson可以完成参数封装和类型转换。但是对于JSON数据中有数组就无能为力了：例如：

　　解决办法：

   @CrossOrigin(origins = "*", maxAge = 3600)

    @RequestMapping(value = "/getArticles")

    @ResponseBody

    public Object getArticles(Long[] id, @RequestBody JSONObject[] obj, HttpServletRequest request){

        Set<Long> ids = new HashSet<>();

        for (JSONObject o :

                obj) {

            ids.add(o.getLong("id"));

        }

        List<Article> articles = articleService.getArticles(ids, request);

        return articles;

    }

end