json 数组到 bean（object 映射器）

Question

读取 json object 并通过创建新的 getter n setter 存储到 bean 中。 我想从下面的 json object 作为字符串接收的粗体值读取。

[{"country":"**India**","provinces":[{**"province":"India","confirmed":265928,"recovered":129095,"deaths":7473,"active":129360**}],"latitude":20.593684,"longitude":78.96288,"date":"2020-06-08"}]

豆：

@JsonIgnoreProperties(ignoreUnknown = true)
public class CoronaBean {
private String country; } and other needs to be created

ObjectMapper mapper = new ObjectMapper();
        try {
            CoronaBean[] coronaBean = mapper.readValue(json, CoronaBean[].class);
            for(CoronaBean c: coronaBean ){
            System.out.println(c.getCountry());
            }
        } catch (JsonProcessingException e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
        }

我能够成功读取国家/地区，但我想读取上面以粗体显示的其他值

Answer 1

CoronaBean应该包含属性provinces ，它必须是另一个具有您想要的属性的 Bean。 就那么简单。

看代码：

@JsonIgnoreProperties(ignoreUnknown = true)
public class CoronaBean {
private String country; 
private ProvinceBean[] provinces
...getters and setters

} 

@JsonIgnoreProperties(ignoreUnknown = true)
public class ProvinceBean {
private Integer confirmed;
private Integer recovered;
...rest you want and getters and setters

我认为您还可以查看此问题以获取更多详细信息和实现所需内容的方法： How to parse JSON in Java