如何在java中从json数据中获取列表

Question

我的Json数据：

{'ID':1,'FirstName':'x','LastName':'y','Company':'x','EMail':'x','PhoneNo':'x'}

我的Java代码：

public static void main(String[] args) throws IOException {
    String json = getJSON().substring(getJSON().indexOf("[")+1,getJSON().indexOf("]"));
    Users user = new Gson().fromJson(json, Users.class);
    WriteLine("["+user.getID()+"]"+" "+user.getFirstName()+" "+user.getLastName()+" "+user.getCompany()+" "+user.getEMail()+" "+user.getPhoneNo());
}

static void WriteLine(String text){
    System.out.print(text);
}

static String getJSON() throws IOException
{
    URL url = new URL("http://localhost:51679/api/User");
    HttpURLConnection connection = (HttpURLConnection)url.openConnection();

    BufferedReader reader = new BufferedReader(new InputStreamReader(connection.getInputStream()));
    StringBuilder sBuilder = new StringBuilder();
    String line;
    while((line = reader.readLine()) != null){
        sBuilder.append(line);
    }
    reader.close();
    connection.disconnect();
    return sBuilder.toString();
}

但我的json数据如下：

{'ID':1,'FirstName':'x','LastName':'x','Company':'x','EMail':'x','PhoneNo':'x'},{'ID':2,'FirstName':'y','LastName':'y','Company':'y','EMail':'x','PhoneNo':'y'}

我有一个错误：由：com引起。谷歌。格森。流动格式错误的JSONException:使用JsonReader。setLenient（true）在第1行第136列接受格式错误的JSON

你能帮我吗？抱歉我的英语不好：(

Answer 1

仔细阅读错误消息该输入不是有效的JSON，这正是消息告诉您的。字符串和键必须用双引号括起来，而不是单引号：

{"ID":1,"FirstName":"x","LastName":"y","Company":"x","EMail":"x","PhoneNo":"x"}

用a JSON validator简单检查一下也会得出同样的结果。或者，正如错误消息方便地告诉您的那样，您可以将读取器设置为对^{}宽容，希望接受格式错误的JSON作为输入