java - org.json.JSONException : JSONObject ["address"] is not a JSONArray

Question

我正在使用 java 中的 org.json 解析 json。我的 json 看起来像:

{
  "address": [{
    "addressLine1": "Noida",
    "addressLine2": "UP"
  }],
  "firstName": "Achyut",
  "lastName": "khanna"
}

我从java代码中获取数据:

JSONArray jsonarr= json.getJsonObject().getJSONArray("address");
String address = jsonarr.getJSONObject(0).getString("addressLine1"));

但它给出了一个异常(exception):

org.json.JSONException: JSONObject["address"] is not a JSONArray.
    at org.json.JSONObject.getJSONArray(JSONObject.java:578)
    at com.altametrics.io.util.test.FNParserUtilTest.testAltaMapToFNJson(FNParserUtilTest.java:513)
    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
    at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
    at java.lang.reflect.Method.invoke(Method.java:601)
    at org.junit.runners.model.FrameworkMethod$1.runReflectiveCall(FrameworkMethod.java:47)
    at org.junit.internal.runners.model.ReflectiveCallable.run(ReflectiveCallable.java:12)
    at org.junit.runners.model.FrameworkMethod.invokeExplosively(FrameworkMethod.java:44)
    at org.junit.internal.runners.statements.InvokeMethod.evaluate(InvokeMethod.java:17)
    at org.junit.runners.ParentRunner.runLeaf(ParentRunner.java:271)
    at org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:70)
    at org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:50)
    at org.junit.runners.ParentRunner$3.run(ParentRunner.java:238)
    at org.junit.runners.ParentRunner$1.schedule(ParentRunner.java:63)
    at org.junit.runners.ParentRunner.runChildren(ParentRunner.java:236)
    at org.junit.runners.ParentRunner.access$000(ParentRunner.java:53)
    at org.junit.runners.ParentRunner$2.evaluate(ParentRunner.java:229)
    at org.junit.runners.ParentRunner.run(ParentRunner.java:309)
    at org.eclipse.jdt.internal.junit4.runner.JUnit4TestReference.run(JUnit4TestReference.java:50)
    at org.eclipse.jdt.internal.junit.runner.TestExecution.run(TestExecution.java:38)
    at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.runTests(RemoteTestRunner.java:467)
    at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.runTests(RemoteTestRunner.java:683)
    at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.run(RemoteTestRunner.java:390)
    at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.main(RemoteTestRunner.java:197)

为什么它没有被识别为 JSONArray？我哪里错了？

Answer 1

尝试以下代码

JSONObject json  = new JSONObject(str);

JSONArray jsonarr= json.getJSONArray("address");
String address = jsonarr.getJSONObject(0).getString("addressLine1");