Question

如何将_design视图结果解析为Java对象（getMethods（））？

请问有谁知道如何将查询结果元素解析为Java Objects而不是使用声明的String？可能吗？我在这里找到的一些建议使用了一个声明的String，它不适合我的概念。

我的文档结构如下：

{
   "_id": "37636ec5fc94e8e60a2744720e001441",
   "_rev": "1-cc97f6f67206667466d619901fb4eb8b",
   "CREATED_DATE": "19-09-13",
   "MODIFICATION_DATE": "20-09-13",
   "VERSION": "1.0",
   "VISIBILITY": "True",
   "PRICE_LIST_ID": "00100",
   "MODIFICATION_USER": "IKK",
   "CUSTOMER_ID": "02227802",
   "CREATION_USER": "IKK",
   "PDF_FILE_NAME": "KOOO",
   "DELETION_FLAG": "1",
   "PDF_FILE_CONTENT": "Pricelist"
 }

我的_design文档是： _design / VIEW_ALL_DOCS

function(doc){
if(doc.DELETION_FLAG == "1" ){
  emit(doc.DELETION_FLAG, doc);
 }
}

以下是我用于应用程序的视图查询

ViewResults resultAdHoc2 = DbProperties.db.view("_design/VIEW_ALL_DOCS"); // 2
ViewResults resultAdHoc = DbProperties.db.view("_all_docs"); // 1

Gson gson = new Gson();

    PriceListDocument pld = gson.fromJson(resultAdHoc.toString(), PriceListDocument.class);     
    System.out.println("id: "+pld.getPriceListId()+" Document Name:"+pld.getDocFileName()  
               +" Original File Name: "+pld.getOriginalFileName()+" Deletion Flag: "+pld.isDeletionFlag() 
               +" Doc FileContents: "+pld.getDocFileContents() +" Visibility: "+pld.getVisibility()
               +" Doc File Version: "+pld.getDocFileVersion() +" Creation Date: "+pld.getCreationDate() 
               +" Creation User: " +pld.getCreationUser() +" Modification Date "+pld.getModificationDate() 
               +" Modification User "+pld.getModificationUser());

控制台输出如下：

id: null Document Name:null Original File Name: null Deletion Flag: false Doc FileContents: null Visibility: null Doc File Version: 0 Creation Date: null Creation User: null Modification Date null Modification User null

resultAdHoc的输出低于它只返回没有元素的文档标题

{"total_rows":9,"offset":0,"rows":    [{"id":"0ecb06ce81df89c03dbedecf47001b4b","key":"0ecb06ce81df89c03dbedecf47001b4b","value":
{"rev":"2-67d92be4f768a6d91f4f4196a264897e"}},{"id":"0ecb06ce81df89c03dbedecf47002a89","key":"0ecb06ce81df89c03dbedecf47002a89","value"
:{"rev":"1-7a0c8243e56157ae1d71d3a63c49e590"}},    {"id":"0ecb06ce81df89c03dbedecf47002b81","key":"0ecb06ce81df89c03dbedecf47002b81","value":]}

resultAdHoc2的输出它在设计视图中返回了javascript函数，但未返回符合条件的文档。

{"_id":"_design/VIEW_ALL_DOCS","_rev":"1-8a5809780cead5e4747fb0e53ebca081","language":"javascript","views":{"VIEW_ALL_DOCS":{"map":"function(doc){\nif(doc.DELETION_FLAG == \"0\" ){\n  emit(doc.DELETION_FLAG, doc);\n }\n}"}}}

Answer 1

我不确定您的要求，我会尽力通过您提供的标签做出最佳猜测。

我的理解是你想要访问来自某个地方的JSON字符串的元素。为此，您需要将字符串反序列化为POJO，然后访问其元素。

像这样声明你的POJO Document：

public class Document {
   String _id;
   int DELETION_FLAG;
   // more member variables...

   public int getDeletionFlag{
      return DELETION_FLAG;
   }
   // more getters/setters

}

然后：

String json = "{\"_id\": \"37636ec5fc94e8e60a2744720e001441\", ....."; // put here your string
Gson g = new Gson();
Document test1 = g.fromJson(json, Document.class);
System.out.println(test1.getDeletionFlag());

将couchdb _design / view结果解析为Java对象

1 个答案: