我有一个从 Groovy 的 HTTPBuilder 返回的 JSON 对象。JSON 包含一些表示为 JSONNull 对象的空值。问题是当我尝试在响应中呈现 JSON 时,当它尝试呈现 JSONNull 时出现错误。我得到一个仅部分呈现的响应。我希望它呈现为“null”。我该怎么做呢?
代码:
render(contentType: "text/json") {
listOfJSONObjectsThatIncludeJSONNulls
}
错误:
| Error 2013-09-17 11:33:56,965 [http-bio-8080-exec-4] ERROR errors.GrailsExceptionResolver - JSONException occurred when processing request: [GET] /my/action
Object is null. Stacktrace follows:
Message: Object is null
Line | Method
->> 69 | isEmpty in net.sf.json.JSONNull
- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
| 199 | value in grails.converters.JSON
| 162 | convertAnother in ''
| 199 | value in ''
| 162 | convertAnother in ''
| 199 | value in ''
| 162 | convertAnother in ''
| 199 | value in ''
| 162 | convertAnother in ''
| 199 | value in ''
| 162 | convertAnother in ''
| 199 | value in ''
| 162 | convertAnother in ''
| 199 | value in ''
| 134 | render . . . . in ''
| 150 | render in ''
| 63 | doCall . . . . in myproject.MyController$_index_closure1_closure2_closure4$$EOHirVeS
| 477 | doRequest in groovyx.net.http.HTTPBuilder
| 417 | doRequest . . in ''
| 349 | request in ''
| 43 | doCall . . . . in myproject.MyController$_index_closure1$$EOHirVeS
| 477 | doRequest in groovyx.net.http.HTTPBuilder
| 268 | get . . . . . in ''
| 31 | index in myproject.MyController$$EOHirVeS
| 895 | runTask . . . in java.util.concurrent.ThreadPoolExecutor$Worker
| 918 | run in ''
^ 680 | run . . . . . in java.lang.Thread
部分渲染输出:
[{"keyWithNullValue":{"array":false,"class":"net.sf.json.JSONNull"