我正在尝试读取这样的JSON文件:
{
"presentationName" : "Here some text",
"presentationAutor" : "Here some text",
"presentationSlides" : [
{
"title" : "Here some text.",
"paragraphs" : [
{
"value" : "Here some text."
},
{
"value" : "Here some text."
}
]
},
{
"title" : "Here some text.",
"paragraphs" : [
{
"value" : "Here some text.",
"image" : "Here some text."
},
{
"value" : "Here some text."
},
{
"value" : "Here some text."
}
]
}
]
}
这是一项学校运动。我选择尝试使用JSON.simple(来自GoogleCode),但是我对另一个JSON库开放。我听说过杰克逊和格森:它们比JSON.simple好吗?
这是我当前的Java代码:
Object obj = parser.parse(new FileReader( "file.json" ));
JSONObject jsonObject = (JSONObject) obj;
// First I take the global data
String name = (String) jsonObject.get("presentationName");
String autor = (String) jsonObject.get("presentationAutor");
System.out.println("Name: "+name);
System.out.println("Autor: "+autor);
// Now we try to take the data from "presentationSlides" array
JSONArray slideContent = (JSONArray) jsonObject.get("presentationSlides");
Iterator i = slideContent.iterator();
while (i.hasNext()) {
System.out.println(i.next());
// Here I try to take the title element from my slide but it doesn't work!
String title = (String) jsonObject.get("title");
System.out.println(title);
}
我检查了很多示例(有些在Stack上!),但从未找到解决问题的方法。
也许我们无法使用JSON.simple做到这一点?您有什么推荐的吗?
您永远不会为分配新值jsonObject
,因此在循环内它仍然引用完整的数据对象。我认为您想要类似的东西:
JSONObject slide = i.next();
String title = (String)slide.get("title");
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