RestEntity Not Working 返回空的正文

Question

我使用 spring 2.0.5 Release 作为父级。我是春天的新手。我正在使用此 API https://www.metaweather.com/api/location/2487956/尝试使用对象映射器显示它，但我遇到了 RestTemplate 问题。public void read() throws IOException {     RestTemplate rest = new RestTemplate();     ResponseEntity<String> response  = rest.getForEntity("https://www.metaweather.com/api/location/2487956", String.class);     ObjectMapper mapper = new ObjectMapper();     JsonNode root = mapper.readTree(response.getBody());     JsonNode name = root.path("weather_state_name");     System.out.println(response.getBody());}

Answer 1

您的 RestEntity 很好，您没有正确解析您的响应。weather_state_name 位于一个名为solidated_weather 的数组中。以下内容将满足您的需求。

        ObjectMapper mapper = new ObjectMapper();

        JsonNode root = mapper.readTree(response.getBody());

        JsonNode consolidated_weather =root.get("consolidated_weather");

        consolidated_weather.forEach(x -> {

            System.out.println( x.get("weather_state_name"));

        });