Question

我正在尝试使用viewJsonService服务类型在XPage上生成REST服务。

在一个列中，我需要有一个JSON对象，并尝试使用以下代码解决这个问题：

<xe:restViewColumn name="surveyResponse">
 <xe:this.value>
<![CDATA[#{javascript:
var arrParticipants = new Array();

arrParticipants.push({"participant": "A", "selection": ["a1"]});
arrParticipants.push({"participant": "B", "selection": ["b1", "b2"]});

return (arrParticipants);
}
]]>

 </xe:this.value>
</xe:restViewColumn>

我期待在特定专栏中获得此内容：

...
"surveyResponse": [
      { "participant": "A",
        "selection": [ "a1" ]
      },
      { "participant": "B",
        "selection": [ "b1", "b2" ]
      }
    ]
...

我得到的是：

...
"surveyResponse": [
      "???",
      "???"
    ]
...

当尝试使用toJson作为数组arrParticipants时，结果是无效的JSON格式：

...
"surveyResponse": "[{\"selection\": [\"a1\"],\"participant\":\"A\"},{\"selection\": [\"b1\",\"b2\"],\"participant\":\"B\"}]"
...

当使用fromJson对数组arrParticipants进行tyring时，结果是：

{
   "code": 500,
   "text": "Internal Error",
   "message": "Error while executing JavaScript computed expression",
   "type": "text",
   "data": "com.ibm.xsp.exception.EvaluationExceptionEx: Error while executing JavaScript computed expression at com.ibm.xsp.binding.javascript.JavaScriptValueBinding.getValue(JavaScriptValueBinding.java:132) at com.ibm.xsp.extlib.component.rest.DominoViewColumn.getValue(DominoViewColumn.java:93) at com.ibm.xsp.extlib.component.rest.DominoViewColumn.evaluate(DominoViewColumn.java:133) at com.ibm.domino.services.content.JsonViewEntryCollectionContent.writeColumns(JsonViewEntryCollectionContent.java:213) at com.ibm.domino.services.content.JsonViewEntryCollectionContent.writeEntryAsJson(JsonViewEntryCollectionContent.java:191) at com.ibm.domino.services.content.JsonViewEntryCollectionContent.writeViewEntryCollection(JsonViewEntryCollectionContent.java:170) at com.ibm.domino.services.rest.das.view.RestViewJsonService.renderServiceJSONGet(RestViewJsonService.java:394) at com.ibm.domino.services.rest.das.view.RestViewJsonService.renderService(RestViewJsonService.java:112) at com.ibm.domino.services.HttpServiceEngine.processRequest(HttpServiceEngine.java:167) at com.ibm.xsp.extlib.component.rest.UIBaseRestService._processAjaxRequest(UIBaseRestService.java:242) at com.ibm.xsp.extlib.component.rest.UIBaseRestService.processAjaxRequest(UIBaseRestService.java:219) at com.ibm.xsp.util.AjaxUtilEx.renderAjaxPartialLifecycle(AjaxUtilEx.java:206) at com.ibm.xsp.webapp.FacesServletEx.renderAjaxPartial(FacesServletEx.java:225) at com.ibm.xsp.webapp.FacesServletEx.serviceView(FacesServletEx.java:170) at com.ibm.xsp.webapp.FacesServlet.service(FacesServlet.java:160) at com.ibm.xsp.webapp.FacesServletEx.service(FacesServletEx.java:138) at com.ibm.xsp.webapp.DesignerFacesServlet.service(DesignerFacesServlet.java:103) at com.ibm.designer.runtime.domino.adapter.ComponentModule.invokeServlet(ComponentModule.java:576) at com.ibm.domino.xsp.module.nsf.NSFComponentModule.invokeServlet(NSFComponentModule.java:1281) at com.ibm.designer.runtime.domino.adapter.ComponentModule$AdapterInvoker.invokeServlet(ComponentModule.java:847) at com.ibm.designer.runtime.domino.adapter.ComponentModule$ServletInvoker.doService(ComponentModule.java:796) at com.ibm.designer.runtime.domino.adapter.ComponentModule.doService(ComponentModule.java:565) at com.ibm.domino.xsp.module.nsf.NSFComponentModule.doService(NSFComponentModule.java:1265) at com.ibm.domino.xsp.module.nsf.NSFService.doServiceInternal(NSFService.java:653) at com.ibm.domino.xsp.module.nsf.NSFService.doService(NSFService.java:476) at com.ibm.designer.runtime.domino.adapter.LCDEnvironment.doService(LCDEnvironment.java:341) at com.ibm.designer.runtime.domino.adapter.LCDEnvironment.service(LCDEnvironment.java:297) at com.ibm.domino.xsp.bridge.http.engine.XspCmdManager.service(XspCmdManager.java:272) Caused by: com.ibm.jscript.InterpretException: Script interpreter error, line=7, col=8: Error while converting from a JSON string at com.ibm.jscript.types.FBSGlobalObject$GlobalMethod.call(FBSGlobalObject.java:785) at com.ibm.jscript.types.FBSObject.call(FBSObject.java:161) at com.ibm.jscript.types.FBSGlobalObject$GlobalMethod.call(FBSGlobalObject.java:219) at com.ibm.jscript.ASTTree.ASTCall.interpret(ASTCall.java:175) at com.ibm.jscript.ASTTree.ASTReturn.interpret(ASTReturn.java:49) at com.ibm.jscript.ASTTree.ASTProgram.interpret(ASTProgram.java:119) at com.ibm.jscript.ASTTree.ASTProgram.interpretEx(ASTProgram.java:139) at com.ibm.jscript.JSExpression._interpretExpression(JSExpression.java:435) at com.ibm.jscript.JSExpression.access$1(JSExpression.java:424) at com.ibm.jscript.JSExpression$2.run(JSExpression.java:414) at java.security.AccessController.doPrivileged(AccessController.java:284) at com.ibm.jscript.JSExpression.interpretExpression(JSExpression.java:410) at com.ibm.jscript.JSExpression.evaluateValue(JSExpression.java:251) at com.ibm.jscript.JSExpression.evaluateValue(JSExpression.java:234) at com.ibm.xsp.javascript.JavaScriptInterpreter.interpret(JavaScriptInterpreter.java:221) at com.ibm.xsp.javascript.JavaScriptInterpreter.interpret(JavaScriptInterpreter.java:193) at com.ibm.xsp.binding.javascript.JavaScriptValueBinding.getValue(JavaScriptValueBinding.java:78) ... 27 more Caused by: com.ibm.commons.util.io.json.JsonException: Error when parsing JSON string at com.ibm.commons.util.io.json.JsonParser.fromJson(JsonParser.java:61) at com.ibm.jscript.types.FBSGlobalObject$GlobalMethod.call(FBSGlobalObject.java:781) ... 43 more Caused by: com.ibm.commons.util.io.json.parser.ParseException: Encountered " "object "" at line 1, column 2. Was expecting one of: "false" ... "null" ... "true" ... ... ... ... "{" ... "[" ... "]" ... "," ... at com.ibm.commons.util.io.json.parser.Json.generateParseException(Json.java:568) at com.ibm.commons.util.io.json.parser.Json.jj_consume_token(Json.java:503) at com.ibm.commons.util.io.json.parser.Json.arrayLiteral(Json.java:316) at com.ibm.commons.util.io.json.parser.Json.parseJson(Json.java:387) at com.ibm.commons.util.io.json.JsonParser.fromJson(JsonParser.java:59) ... 44 more "
}

有没有办法得到理想的答案？

Answer 1

如果需要返回级联的JSON对象，获得所需结果的最佳方法是使用 xe：customRestService 。

所有其他xe：*** RestService元素假设您将返回参数和值对的平面JSON构造，其中值是一个简单的数据类型（如布尔值，数字或字符串以及 - 尽管 - 数组）但是不是复杂的数据类型（如对象）。

这就是这个结果

...
"surveyResponse": [
      { "participant": "A",
        "selection": [ "a1" ]
      },
      { "participant": "B",
        "selection": [ "b1", "b2" ]
      }
    ]
...

仅在使用 xe：customRestService 时可用，您可以自行定义JSON结果。

使用其他服务的结果仅限于此结构：

...
"surveyResponse": true;
...

或

...
"surveyResponse": [
      "A",
      "B"
]
...

Answer 2

你不能使用内置的服务器端javascript函数 toJson ？

Answer 3

您可以尝试在读取JSON时拦截AJAX调用，然后手动取消清理JSON字符串数据。

这里有更多细节。

http://www.browniesblog.com/A55CBC/blog.nsf/dx/15112012082949PMMBRD68.htm

我个人建议不要这样做，除非你绝对确定最终用户不能将代码注入JSON数据。

有没有办法在xe：restViewColumn中返回一个JSON对象？

3 个答案: