GWT Autobean Bean 为空

Posted 2023-02-16

【中文标题】GWT Autobean Bean 为空

【英文标题】：GWT Autobean Bean is null

【发布时间】：2017-02-09 11:57:02

【问题描述】：

请帮帮我，我做错了什么

InfraNameModel

public interface InfraNameModel 
    String getInfraName();

    void setInfraName(String infraName);

InfraNameModelImpl

public class InfraNameModelImpl implements InfraNameModel 
    private String infraName;

    @Override
    public String getInfraName() 
        return infraName;
    

    @Override
    public void setInfraName(String infraName) 
        this.infraName = infraName;
    

InfraNameModelList

public interface InfraNameModelList<T extends InfraNameModel> 

    public List<T> getInfraNameModelList();

    public void setInfraNameModelList(List<T> infraNameModel);

InfraNameModelListImpl

public class InfraNameModelListImpl implements InfraNameModelList<InfraNameModel> 
    private List<InfraNameModel> infraNameModelList;

    @Override
    public List<InfraNameModel> getInfraNameModelList() 
        return infraNameModelList;
    

    @Override
    public void setInfraNameModelList(List<InfraNameModel> infraNameModelList) 
        this.infraNameModelList = infraNameModelList;
    

IBeanFactory

public interface IBeanFactory extends AutoBeanFactory 
    IBeanFactory INSTANCE = GWT.create(IBeanFactory.class);

    AutoBean<InfraNameModel> infraNameModel();

    AutoBean<InfraNameModelList> infraNameModelList();

...

            InfraNameModelList infraNameModelList = beanFactory.deserializeFromJson(" [\"infraName\":\"TEST1\",\"infraName\":\"TEST2\"");
            if (infraNameModelList == null)
                logger.info("infraNameModelList=== null");
            else
                logger.info("infraNameModelList not null " + infraNameModelList);
            List<InfraNameModelImpl> infraNameModel = infraNameModelList.getInfraNameModelList();
            if (infraNameModel == null)
                logger.info("infraNameModel=== null");
            else
                logger.info("infraNameModel=== not null " + infraNameModel);
            InfraNameModelImpl infraNameModelImpl = infraNameModel.get(0);
            if (infraNameModel == null)
                logger.info("infraNameModelImpl=== null");
            else
                logger.info("infraNameModelImpl=== not null " + infraNameModelImpl);
            logger.info("===" + infraNameModelImpl.getInfraName());

所以我有这样的错误 在这一行

ConsoleLogger.java:32 infraNameModel=== null

为什么 infraNameModel 为空？？？ =(

===SUCCESS
ConsoleLogger.java:32 ===["infraName":"TEST1","infraName":"TEST2"]
ConsoleLogger.java:32 infraNameModelList not null by.client.models.infraNameModel.InfraNameModelListAutoBean$2@36
ConsoleLogger.java:32 infraNameModel=== null
ConsoleLogger.java:32 (TypeError) : Cannot read property 'get_18_g$' of null
H3f_g$ @ ConsoleLogger.java:32
eAf_g$ @ SimpleConsoleLogHandler.java:36
szf_g$ @ Logger.java:312
rzf_g$ @ Logger.java:302
Pzf_g$ @ Logger.java:236
rad_g$ @ LogConfiguration.java:169
lab_g$ @ Impl.java:186
$9_g$ @ Impl.java:293
(anonymous) @ Impl.java:77
ConsoleLogger.java:55 Exception: com.google.gwt.core.client.javascriptException: (TypeError) : Cannot read property 'get_18_g$' of null
ConsoleLogger.java:32 TypeError: Cannot read property 'get_18_g$' of null
    at uHg_g$.D$g_g$ [as onSuccess_8_g$] (Configuration.java:71)
    at uHg_g$.xHg_g$ [as onSuccess_1_g$] (Configuration.java:55)
    at S9f_g$.Ny_g$ [as onResponseReceived_0_g$] (AbstractRequestCallback.java:94)
    at ZLc_g$.aMc_g$ [as fireOnResponseReceived_0_g$] (Request.java:250)
    at hNc_g$.iNc_g$ [as onReadyStateChange_0_g$] (RequestBuilder.java:412)
    at XMLHttpRequest.<anonymous> (XMLHttpRequest.java:329)
    at X9_g$ (Impl.java:239)
    at $9_g$ (Impl.java:291)
    at XMLHttpRequest.<anonymous> (Impl.java:77)

【参考方案1】：

为什么 infraNameModel 为空？？？ =(

因为数组没有infraNameModelList 属性。

您必须将 JSON 数组包装到具有此类属性的对象中，以使其与您的 AutoBean 模型匹配。

【讨论】：

我刚刚读到你在 4 年前回答 groups.google.com/forum/#!topic/google-web-toolkit/8Ts07mG0Ci8。能详细描述一下吗？？？

[\"infraName\":\"TEST1\",\"infraName\":\"TEST2\"] ...... .. 我需要将此 JSON 包装在 "results" : [ "infraName" : "TEST1" , "infraName" : "TEST2" ] 中吗？