Question

我已经使用gson将json解析为java对象。

现在我在eclispe面临堆内存问题，同样如下： Java heap space with GSON

正如我所说的gson-streaming文章那样

gson-streaming
gson-streaming-to-read-and-write-json

两者都讨论流式传输，

Gson流媒体处理速度快，但难以编码，因为您需要处理处理JSON数据的每个细节。

我使用了客户端和通信对象。服务器通信。沟通结构就像

class CommunicationObject
{
//Other variables
IsBean isBean; //Interface of hibernate entity bean
//Getter & setter methods
}

这里isBean是访问任何单个实体bean时的通用。没有案例

->Do login logic then isBean has a user object
->Get organization then isBean has a Organization object.
...
etc

处理请求方法的代码：

public String processFacadeActionTest(String requestJson) { 
        Gson gson = new GsonBuilder().registerTypeAdapter(IsBean.class, new InterfaceAdapter<IsBean>())
                .create();
        CommunicationObject requestObj=null;
        try{
         requestObj=gson.fromJson(requestJson, CommunicationObject.class);
        }catch (Exception e) {
         e.printStackTrace();

        }
        FacadeActionHandler actionHandler=new FacadeActionHandler();
        CommunicationObject responseObj =  actionHandler.handleRequest(requestObj);
        String returnString="";
        try{
            //TODO:Comment Bhumika heap space issue
            returnString=convertIntoJson(responseObj);
        return returnString;
        }catch (Exception e) {
            e.printStackTrace();
        }
        return returnString;
}

将对象转换为json

private String convertIntoJson(CommunicationObject obj) throws IOException
    {
        ByteArrayOutputStream outputStream=new ByteArrayOutputStream();
        DataOutputStream out = new DataOutputStream(outputStream);
        writeJsonStream(out, obj);
        return outputStream.toString();
    }

使用gson进行流式传输

private void writeJsonStream(OutputStream out,CommunicationObject communicationObject) throws IOException {
                JsonWriter writer = new JsonWriter(new OutputStreamWriter(out, "UTF-8"));
                writer.setIndent("  ");
                writer.beginArray();
                Gson gson = new GsonBuilder().registerTypeAdapter(IsBean.class, new InterfaceAdapter<IsBean>())
                        .create();
                  gson.toJson(communicationObject, CommunicationObject.class, writer); //Hear stuck how to map isBean object
                writer.endArray();
                writer.close();
            }

我被困在 gson.toJson（communicationObject，CommunicationObject.class，writer） 如何在这样的请求对象上进行流式传输？或任何其他可用的替代品？让我知道任何有问题的查询。

用gson堆内存问题

0 个答案: