Question

我正在学习使用Jackson来序列化XML。我的班级结构如下。

class City {
    @JacksonXmlProperty(localName = "CityName")
    String cityName;

    public City(String cityName) {
        this.cityName = cityName;
    }

    public String getcityName() {
        return cityName;
    }

    public void setcity(String cityName) {
        this.cityName = cityName;
    }
}

@JacksonXmlRootElement(localName = "Person")
class Person {
    @JacksonXmlProperty(localName = "name")
    private String name;

    @JacksonXmlProperty(localName = "age")
    private String age;

    @JacksonXmlProperty(localName = "city")
    private List<City> city;

    public Person() { }

    Person(String name, String age, List<City> city) {
        this.name = name;
        this.age = age;
        this.city = city;
    }

    public String getname() {
        return name;
    }

    public String getage() {
        return age;
    }

    public List<City> getcity() {
        return city;
    }

    public void setname(String name) {
        this.name = name;
    }

    public void setage(String age) {
        this.age = age;
    }

    public void setcity(List<City> city) {
        this.city = city;
    }
}

当我尝试使用Jackson将类序列化为XML时，我得到了<city>的两个标签

public class App
{
    public static void main( String[] args )
    {
        try {
            XmlMapper xmlMapper2 = new XmlMapper();
            Person p = new Person();
            City c1 = new City("abc");
            City c2 = new City("def");
            City c3 = new City("ghi");
            List<City> cityList = new ArrayList<City>();
            cityList.add(c1);
            cityList.add(c2);
            cityList.add(c3);
            p.setname("setattr");
            p.setage("55");
            p.setcity(cityList);
            xmlMapper2.enable(SerializationFeature.INDENT_OUTPUT);
            String respPerson = xmlMapper2.writeValueAsString(p);
            System.out.println(respPerson);
        } catch (Exception e) {
            e.printStackTrace();
        }
    }

这是我得到的输出。

<Person><name>setattr</name><age>55</age><city><city><CityName>sfo</CityName></city><city><CityName>sjc</CityName></city><city><CityName>sea</CityName></city></city></Person>

你能帮助我理解为什么我会为城市获得两个标签以及如何解决它？

我希望输出类似，

<Person><name>setattr</name><age>55</age><city><CityName>sfo</CityName><CityName>sjc</CityName><CityName>sea</CityName></city></Person>

Answer 1

你有一个城市列表。杰克逊正在使用＆＃39; city＆＃39;列表本身和列表成员。如果您将本地名称更改为＆＃39; cities＆＃39;，您可能会更喜欢这些结果。

不幸的是，这不是正确的答案。相反，似乎提供了正确的答案https://stackoverflow.com/a/27144625/131433。

使用Jackson将对象序列化为XML

1 个答案: