相关疑难解决方法(0)

我低于错误.

由于以下原因无法解析JSON:com.google.gson.JsonSyntaxException:java.lang.IllegalStateException:预期BEGIN_ARRAY但在第1行第2列是BEGIN_OBJECT

服务器URL

public static final String SERVER_URL = "https://maps.googleapis.com/maps/api/timezone/json?location=-37.8136,144.9631&timestamp=1389162695&sensor=false";

执行请求

    try {
        // Create an HTTP client
        HttpClient client = HttpClientBuilder.create().build();
        HttpPost post = new HttpPost(SERVER_URL);

        // Perform the request and check the status code
        HttpResponse response = client.execute(post);
        StatusLine statusLine = response.getStatusLine();
        if (statusLine.getStatusCode() == 200) {
            HttpEntity entity = response.getEntity();
            InputStream content = entity.getContent();

            try {
                // Read the server response and attempt to parse it as JSON
                Reader reader = new InputStreamReader(content);

                GsonBuilder gsonBuilder = new …

(这篇文章是一个规范性的问题,下面提供了一个示例答案.)

我正在尝试将一些JSON内容反序列化为自定义POJO类型Gson#fromJson(String, Class).

这段代码

import com.google.gson.Gson;

public class Sample {
    public static void main(String[] args) {
        String json = "{\"nestedPojo\":[{\"name\":null, \"value\":42}]}";
        Gson gson = new Gson();
        gson.fromJson(json, Pojo.class);
    }
}

class Pojo {
    NestedPojo nestedPojo;
}

class NestedPojo {
    String name;
    int value;
}

抛出以下异常

Exception in thread "main" com.google.gson.JsonSyntaxException: java.lang.IllegalStateException: Expected BEGIN_OBJECT but was BEGIN_ARRAY at line 1 column 16 path $.nestedPojo
    at com.google.gson.internal.bind.ReflectiveTypeAdapterFactory$Adapter.read(ReflectiveTypeAdapterFactory.java:200)
    at com.google.gson.internal.bind.ReflectiveTypeAdapterFactory$1.read(ReflectiveTypeAdapterFactory.java:103)
    at com.google.gson.internal.bind.ReflectiveTypeAdapterFactory$Adapter.read(ReflectiveTypeAdapterFactory.java:196)
    at com.google.gson.Gson.fromJson(Gson.java:810)
    at com.google.gson.Gson.fromJson(Gson.java:775)
    at com.google.gson.Gson.fromJson(Gson.java:724)
    at …