我的代码向服务器发送GET请求,
URL obj = new URL(url);
HttpURLConnection con = (HttpURLConnection) obj.openConnection();
con.setRequestMethod("GET");
con.setRequestProperty("User-Agent", USER_AGENT);
BufferedReader in = new BufferedReader(new InputStreamReader(con.getInputStream()));
我得到一个打印的BufferedReader对象,
{
"status": "ERROR",
"errorCode": "MISSING_PARAMS",
"errorMessage": null,
"requestId": "20141014181739_11625805172",
"downstreamModuleErrorCode": null,
"object": [
"activity_code",
"activity_name",
"points",
"frequency",
"strategy",
"vsa_app_access_token"
]
}
我想从中获取JSONOBject或Map。我尝试将其转换为String并对其进行操作。但这并不容易。请帮忙。
答案 0 :(得分:22)
首先将其作为字符串。您可以使用自定义库来
String message = org.apache.commons.io.IOUtils.toString(rd);
或StringBuilder
StringBuilder sb = new StringBuilder();
String line;
br = new BufferedReader(new InputStreamReader(is));
while ((line = br.readLine()) != null) {
sb.append(line);
}
然后你可以解析它。因为它是" {" (数组以[]开头和结尾)你需要创建一个JSONObject。
JSONObject json = new JSONObject(sb.toString());
然后您可以使用
访问您的元素//{ "status": "ERROR", "errorCode": "MISSING_PARAMS", "errorMessage": null, "requestId": "20141014181739_11625805172", "downstreamModuleErrorCode": null, "object": [ "activity_code", "activity_name", "points", "frequency", "strategy", "vsa_app_access_token" ]}
json.getString("status");
或带
的数组JSONArray jsonArray = new JSONArray(json.getString("object"));
或者您使用方法getJSONArray()
JSONArray jsonArray = json.getJSONArray("object");
答案 1 :(得分:4)
InputStream inputStream = connection.getInputStream();
BufferedReader bufferedReader = new BufferedReader(new InputStreamReader(inputStream));
StringBuilder builder = new StringBuilder();
String line;
while ((line = bufferedReader.readLine()) != null) {
builder.append(line + "\n");
}
JSONArray jsonArray = new JSONArray(builder.toString());
for (int i = 0; i < jsonArray.length(); i++) {
JSONObject json = jsonArray.getJSONObject(i);
if (!json.get("object").equals(null)) {
JSONArray objectJsonArray = json.getJSONArray("object");
for (int i = 0; i < objectJsonArray.length(); i++) {
JSONObject json = objectJsonArray.getJSONObject(i);
}
}
}
希望它有所帮助。
答案 2 :(得分:1)
那呢:
BufferedReader in = new BufferedReader(new InputStreamReader(connection.getInputStream()));
JsonReader reader = Json.createReader(in);
JsonObject object = reader.readObject();
String s = object.toString();
答案 3 :(得分:0)
使用此lib(org.json),您可以将字符串转换为json对象:http://www.json.org/java/
JSONObject jsonObj = new JSONObject("{\"phonetype\":\"N95\",\"cat\":\"WP\"}");
答案 4 :(得分:0)
在org.json
的最新版本中,您可以执行以下操作:
JSONTokener tokener = new JSONTokener(bufferedReader);
JSONObject json = new JSONObject(tokener);
作为快速证明,它可以与org.json:json:20190722
一起使用:
byte[] b = "{ \"active\" : true }".getBytes(StandardCharsets.UTF_8);
InputStream is = new ByteArrayInputStream(b);
BufferedReader bufferedReader = new BufferedReader(new InputStreamReader(is));
JSONTokener tokener = new JSONTokener(bufferedReader);
JSONObject json = new JSONObject(tokener);