ssh 框架写接口注意事项

最新推荐文章于 2021-02-23 23:22:52 发布

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最新推荐文章于 2021-02-23 23:22:52 发布

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分类专栏：后台管理接口 java json 文章标签： ssh java 接口

本文链接：https://blog.youkuaiyun.com/zhufaming12/article/details/44942947

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本文介绍如何在 Struts2 中使用 JSON 插件实现数据的 JSON 格式返回，包括所需 JAR 包、Struts 配置、Action 实现等关键步骤，并给出了解决延迟加载问题的方法。

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------------注意的包：

struts2-json-plugin-2.1.8.1.jar

json-lib-2.1.jar

commons-collections-3.2.jar

commons-beanutils-1.7.0.jar

commons-lang-2.3.jar

commons-logging-1.0.4.jar

ezmorph-1.0.3.jar

这7个包是返回json形式的数据必须的。因为json大量引用了Apache commons的包，所以要加入4个，commons包，除了commons的包外，还需要引入一个 ezmorph的包。最后加入struts2必须的6个包：

struts2-core-2.1.8.1.jar

xwork-core-2.1.6.jar

ognl-2.7.3.jar

freemarker-2.3.15.jar

commons-fileupload-1.2.1.jar

commons-io-1.3.2.jar

--------------struts配置

<struts>
   <constant name="struts.objectFactory" value="spring"></constant>
   <constant name="struts.multipart.maxSize" value="10485760"/>
   <package name="hlshMobileInterface" namespace="/" extends="json-default" >
       <action name="mobile" class="mobileInterfaceAction">
           
           <result name="success" type="json">
               <param name="root">communityMap</param>
            </result>
       </action>
   </package>
</struts>

----------action

public class MobileInterfaceAction extends ActionSupport implements ServletRequestAware,ServletResponseAware{
       //注入service
       private MobileInterfaceService mobileInterfaceService;
       private CommunityService communityService;
       private InformationService informationService;
       private AdvertismentService advertismentService;
       private CommunityServiceService communityServiceService;
       private AroundBusinessService aroundBusinessService;
       //请求
       private HttpServletRequest request;
       //响应
       private HttpServletResponse response;
       private Map<String,Object> communityMap;
       //key值
       private String keyCom="com";
       /**
       *
       * @return communityMap
       */
        public Map<String, Object> getCommunityMap() {
           return communityMap;
       }

       public void setMobileInterfaceService(
               MobileInterfaceService mobileInterfaceService) {
           this.mobileInterfaceService = mobileInterfaceService;
       }

       public void setCommunityService(CommunityService communityService) {
           this.communityService = communityService;
       }

       public void setInformationService(InformationService informationService) {
           this.informationService = informationService;
       }

       public void setAdvertismentService(AdvertismentService advertismentService) {
           this.advertismentService = advertismentService;
       }

       public void setCommunityServiceService(
               CommunityServiceService communityServiceService) {
           this.communityServiceService = communityServiceService;
       }

       public void setAroundBusinessService(AroundBusinessService aroundBusinessService) {
           this.aroundBusinessService = aroundBusinessService;
       }


       public void setServletResponse(HttpServletResponse arg0) {
           // TODO Auto-generated method stub

       }

       public void setServletRequest(HttpServletRequest arg0) {
           // TODO Auto-generated method stub

       }
       @Override
       public String execute() throws Exception {
           // TODO Auto-generated method stub
           communityMap=new HashMap<String, Object>();
           List<Community> lstCom=null;
           /*List<Hlshadvertisement> lstAdvtesment=null;*/
           try {
               lstCom=communityService.getAllCountCommunity(new Community());
               /*lstAdvtesment=informationService.getAllAdvertisment(new Hlshadvertisement());*/
               communityMap.put(keyCom, lstCom);
               communityMap.put("result",1);
           } catch (Exception e) {
               // TODO: handle exception
               communityMap.put(keyCom, null);
               communityMap.put("result",0);
           }
           return "success";
       }
       /**
       * 移动接口返回所有的下去数据
       * @return
       *//*
       public String getAllComunity(){
           List<Community> lstCom=null;
           try {
               lstCom=communityService.getAllCountCommunity(new Community());
               communityMap.put(keyCom, lstCom);
               communityMap.put("result",1);
           } catch (Exception e) {
               // TODO: handle exception
               communityMap.put(keyCom, null);
               communityMap.put("result",0);
           }
           return "success";
       } */

}
-----------------解决延迟加载的问题（值得注意）

struts2 在 xml的配置已经不管用（如下）

<filter>
   <filter-name>openSessionInViewFilter</filter-name>
   <filter-class>org.springframework.orm.hibernate3.support.OpenSessionInViewFilter</filter-class>
</filter>

<filter-mapping>
   <filter-name>openSessionInViewFilter</filter-name>
   <url-pattern>*.action</url-pattern>
</filter-mapping>

<filter-mapping>
   <filter-name>openSessionInViewFilter</filter-name>
   <url-pattern>*.jsp</url-pattern>
</filter-mapping>

-------------------解决方案（可能存在延迟加载的地方）

添加：@JSON(serialize=false)

如：

@JSON(serialize=false)
   public Set getAroundbusinesses() {
       return this.aroundbusinesses;
   }