Question

我已经使用Java中的Jackson将一些信息转换为Json格式。以下是我得到的输出

[{"lat":45.9,"lon":10.9,"title":"Title A1","html":"<h3>Content A1</h3>","icon":"http://maps.google.com/mapfiles/markerA.png"},{"lat":44.8,"lon":1.7,"title":"Title B1","html":"<h3>Content B1</h3>","icon":"http://maps.google.com/mapfiles/markerB.png","show_infowindow":false},{"lat":51.5,"lon":-1.1,"title":"Title C1","html":"<h3>Content C1</h3><p>Lorem Ipsum..</p>","zoom":8,"icon":"http://maps.google.com/mapfiles/markerC.png"}]

我的问题是如何以下面的格式获得它，基本上将Json添加到一个名为locations的根节点

{"locations":[{"lat":45.9,"lon":10.9,"title":"Title A1","html":"<h3>Content A1</h3>","icon":"http://maps.google.com/mapfiles/markerA.png"},{"lat":44.8,"lon":1.7,"title":"Title B1","html":"<h3>Content B1</h3>","icon":"http://maps.google.com/mapfiles/markerB.png","show_infowindow":false},{"lat":51.5,"lon":-1.1,"title":"Title C1","html":"<h3>Content C1</h3><p>Lorem Ipsum..</p>","zoom":8,"icon":"http://maps.google.com/mapfiles/markerC.png"}]}

Answer 1

您可以将数组包装成像这样的JSONObject

ObjectMapper mapper = new ObjectMapper();

Map<String, Object> map = new HashMap<String, Object>();

String json = jsonArray.toString();
map.put("locations", json);

json = mapper.writeValueAsString(map);

Answer 2

您可以通过以下更改来实现此目的。

让我们假设，您的JSON同样基于Bean.java类创建，

[{"lat":45.9,"lon":10.9,"title":"Title A1","html":"<h3>Content A1</h3>","icon":"http://maps.google.com/mapfiles/markerA.png"},{"lat":44.8,"lon":1.7,"title":"Title B1","html":"<h3>Content B1</h3>","icon":"http://maps.google.com/mapfiles/markerB.png","show_infowindow":false},{"lat":51.5,"lon":-1.1,"title":"Title C1","html":"<h3>Content C1</h3><p>Lorem Ipsum..</p>","zoom":8,"icon":"http://maps.google.com/mapfiles/markerC.png"}]

现在，根据您的新要求，您也想要一些东西，

{"locations":[{"lat":45.9,"lon":10.9,"title":"Title A1","html":"<h3>Content A1</h3>","icon":"http://maps.google.com/mapfiles/markerA.png"},{"lat":44.8,"lon":1.7,"title":"Title B1","html":"<h3>Content B1</h3>","icon":"http://maps.google.com/mapfiles/markerB.png","show_infowindow":false},{"lat":51.5,"lon":-1.1,"title":"Title C1","html":"<h3>Content C1</h3><p>Lorem Ipsum..</p>","zoom":8,"icon":"http://maps.google.com/mapfiles/markerC.png"}]}

所以，在这种情况下，你需要创建一个更多的类，让我们说它是SuperBean.java然后它应该是同样的，

public class SuperBean {
     private Bean [] locations;

    public Bean[] getBean() {
        return locations;
    }

    public void setBean(Bean[] locations) {
        this.locations = locations;
    }
}

因此，您的JSON也将同样创建，

{"locations":[......]} // as per your requirement.

在java中将父节点添加到Json输出

2 个答案: