1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
private void GetRequest(String url){
    HttpURLConnection connection=null;
    try {
        URL url = new URL(url);
        connection = (HttpURLConnection) url.openConnection();
        connection.setConnectTimeout(1000);
        connection.setReadTimeout(1000);
        connection.setRequestMethod("GET");
        connection.setDoInput(true);
        connection.setDoOutput(false);
        connection.connect();
        int responseCode = connection.getResponseCode();
        if (responseCode != HttpURLConnection.HTTP_OK) {
            throw new IOException("HTTP error code" + responseCode);
        }
        String result = getStringByStream(connection.getInputStream());
        ...
    }
    catch (Exception e) {
        ...
    }
}

private void PostRequest(String url, String param){
    HttpURLConnection connection = null;
    try {
        URL url = new URL(url);
        connection = (HttpURLConnection) url.openConnection();
        connection.setConnectTimeout(3000);
        connection.setReadTimeout(3000);
        connection.setRequestProperty("Content-Type", "application/json"); // 设置内容类型
        connection.setRequestMethod("POST");
        connection.setDoInput(true);
        connection.setDoOutput(false);
        connection.connect();
        JSONObject jsonParam = new JSONObject();
        jsonParam.put("param", param);
        OutputStream os = connection.getOutputStream();
        byte[] input = jsonParam.toString().getBytes("utf-8");
        os.write(input, 0, input.length);
        int responseCode = connection.getResponseCode();
        if (responseCode != HttpURLConnection.HTTP_OK) {
            throw new IOException("HTTP error code" + responseCode);
        }
        String result = getStringByStream(connection.getInputStream());
        ...
    }
    catch (Exception e) {
        ...
    }
}

private String getStringByStream(InputStream inputStream){
    Reader reader;
    try {
        reader=new InputStreamReader(inputStream,"UTF-8");
        char[] rawBuffer=new char[512];
        StringBuffer buffer=new StringBuffer();
        int length;
        while ((length=reader.read(rawBuffer))!=-1){
            buffer.append(rawBuffer,0,length);
        }
        return buffer.toString();
    } catch (UnsupportedEncodingException e) {
        e.printStackTrace();
    } catch (IOException e) {
        e.printStackTrace();
    }
    return null;
}