Question

我正在尝试使用此代码从URL解析Json数组。

public class Main {
static class Item {
    @SerializedName("id")
    public String id;

    @SerializedName("name")
    public String name;

    @SerializedName("timelimitstart")
    public String timelimitstart;

    @SerializedName("timelimitend")
    public String timelimitend;

    @SerializedName("esttime")
    public String esttime;

    @SerializedName("location")
    public String location;

    @SerializedName("description")
    public String description;
}

private static String readUrl(String urlString) throws Exception {
    BufferedReader reader = null;
    try {
        URL url = new URL(urlString);
        reader = new BufferedReader(new InputStreamReader(url.openStream()));
        StringBuffer buffer = new StringBuffer();
        int read;
        char[] chars = new char[1024];
        while ((read = reader.read(chars)) != -1)
            buffer.append(chars, 0, read);

        return buffer.toString();
    } finally {
        if (reader != null)
            reader.close();
    }
}

public static void main(String[] args) throws Exception {
    Gson gson = new Gson();

    String fromURL = readUrl("http://ec2-54-69-156-10.us-west-2.compute.amazonaws.com/getactivities.php");
    String nonURL = "[{\"id\":\"1\",\"name\":\"Mine raamatukokku\",\"timelimitstart\":\"\",\"timelimitend\":\"\",\"esttime\":\"00:00:00\",\"location\":\"\",\"description\":\"Mine Ćµpi!\"},{\"id\":\"1\",\"name\":\"Mine raamatukokku\",\"timelimitstart\":\"\",\"timelimitend\":\"\",\"esttime\":\"00:00:00\",\"location\":\"\",\"description\":\"Mine Ćµpi!\"}]";

    Item[] data = gson.fromJson(nonURL, Item[].class);

}

}

它与nonURL输入一起使用并且解析得很好，但是使用fromURL输入它会显示“预期BEGIN_ARRAY但是STRING”。

我在想，它来自于它之前的[这就是它存在问题的原因，但我对如何解决这个问题缺乏想法。

Answer 1

您从网址获得的回复第一行有<meta charset="UTF-8">（您可以通过浏览器直接浏览网址并查看其来源来查看）：

要使其成为有效的json，您可以删除该行：

String fromURL = readUrl("http://ec2-54-69-156-10.us-west-2.compute.amazonaws.com/getactivities.php");

fromURL = fromURL.replace("<meta charset=\"UTF-8\">", "");
Item[] data = gson.fromJson(fromURL, Item[].class);

修改 http://ec2-54-69-156-10.us-west-2.compute.amazonaws.com/getactivities.php的当前回复：

<meta charset="UTF-8"> [{"id":"1","name":"Mine raamatukokku","timelimitstart":"","timelimitend":"","esttime":"00:00:00","location":"","description":"Mine õpi!"},{"id":"2","name":"Mine jooksma","timelimitstart":"","timelimitend":"","esttime":"00:00:00","location":"","description":"Sport on hea"},{"id":"3","name":"Tee uinak","timelimitstart":"","timelimitend":"","esttime":"00:00:00","location":"","description":"1 tund"}]

预计BEGIN_ARRAY但是STRING

1 个答案: