Java遍歴json文字列取値
57601 ワード
JAvaはjson文字列を遍歴し、対応するKV値を取得する際、jsonのリストを取り出してJSOnArrayに変換し、リストのobjectをmapに変換し、値を取る(以前のやり方)、仙子はアリのfastjsonを通じてstrをJSOnArrayに直接変換し、中のobjectをJSOnObjectに強く変換し、obj.getInteger(「key」)とobj.getString(「key」)などの値をとります.
1.json文字列に配列とmapオブジェクトがある場合、データを遍歴し、データフォーマットは以下の通りである.
上のjson文字列データを解析し、fastjsonやGsonのようなものを使用しない場合、解析方法は次のとおりです.
方法1
方法2
2.json文字列に配列が含まれている場合、データの遍歴は以下のようになります.
方法1
方法2
Gsonは、json文字列をjsonオブジェクトに変換します.
JSONArray json = (JSONArray) JSONArray.parse(str);
for (Object obj : json) {
JSONObject jo = (JSONObject)obj;
int status = jo.getInteger("status");
String message= jo.getString("message");
System.out.println("status---" + status + "---message---" + message);
}1.json文字列に配列とmapオブジェクトがある場合、データを遍歴し、データフォーマットは以下の通りである.
[
{
"status":0,
"tags":[
"check:ntp"
],
"timestamp":1492151922.198,
"check":"datadog.agent.check_status",
"host_name":"song-2",
"message":null,
"id":2
},
{
"status":0,
"tags":null,
"timestamp":1492151922.2325,
"check":"datadog.agent.up",
"host_name":"song-2",
"message":null,
"id":5
}
]上のjson文字列データを解析し、fastjsonやGsonのようなものを使用しない場合、解析方法は次のとおりです.
方法1
/**
* ， message
* @param str
* @return
* @throws Exception
*/
private List方法2
/**
* ， message
* @param str
* @return
* @throws Exception
*/
private List2.json文字列に配列が含まれている場合、データの遍歴は以下のようになります.
[
[
"haproxy",
"haproxy",
0,
"ERROR",
"swdfghyjuikl",
{
}
],
[
"gearmand",
"gearmand",
0,
"ERROR",
"'Found no valid connections in list: []'" ,
{
"version":"[8, 4, 20]"
}
]
]方法1
/**
* agentChecksStr
* @param agentChecksStr
* @return
*/
private List<Map<String,String>> getExceptInfoFromAgentChecks(String agentChecksStr){
List<Map<String,String>> mList = new ArrayList<Map<String,String>>();// list
//mList ， message
Object jsonArray = JSONArray.parse(agentChecksStr);
@SuppressWarnings("unchecked")
List<List<Object>> list= (List<List<Object>>) jsonArray;
Map<String,String> map = null;
for(int i=0;i<list.size();i++){
map = new HashMap<String,String>();
String status = list.get(i).get(3).toString();
if(!status.equals("OK")){
String serviceName = list.get(i).get(0).toString();
String msg = list.get(i).get(4).toString();
map.put("serviceName", serviceName);
map.put("status", status);
map.put("msg", msg);
mList.add(map);
}
}
return mList;
}方法2
/**
* agentChecksStr
* @param agentChecksStr
* @return
*/
private List<Map<String,String>> getExceptInfoFromAgentChecks(String agentChecksStr){
// list
List<Map<String,String>> mList = new ArrayList<Map<String,String>>();
JSONArray jsonArray = (JSONArray) JSONArray.parse(agentChecksStr);
Map<String,String> map = null;
for (Object obj : jsonArray) {
map = new HashMap<String,String>();
JSONArray ja = (JSONArray)obj;
String status = ja.getString(3);
if(!status.equals("OK")){
String serviceName = ja.getString(0);
String msg = ja.getString(4);
map.put("serviceName", serviceName);
map.put("status", status);
map.put("msg", msg);
mList.add(map);
}
}
return mList;
}Gsonは、json文字列をjsonオブジェクトに変換します.
import com.google.gson.Gson;
import com.google.gson.JsonArray;
import com.google.gson.JsonElement;
import com.google.gson.JsonObject;
import com.google.gson.JsonParser;
public class MainTest {
public static void main(String[] args) throws Exception{
String jsonstr0 = "{\"alarmDetails\":{\"conditionDetails\":{\"alarmId\":7,\"alarmNodataNotifyTime\":1,\"alarmNowSeriesWaitTime\":2},\"conditionStatic\":{\"alarmId\":7,\"conditionAggregate\":\"avg\",\"conditionOperator\":1,\"conditionThresholdTime\":5,\"conditionThresholdValue\":\"123\"},\"metricDetails\":{\"alarmId\":7,\"metricAggregater\":\"avg\",\"metricBy\":\"host\",\"metricExcludeTag\":\"host:paas-177\",\"metricName\":\"system.cpu.user\",\"metricQ\":\"avg:system.cpu.user{#address:wuhan,!host:paas-177}by{host}\",\"metricTag\":\"#address:wuhan\"},\"notify\":[{\"alarmId\":7,\"notifyChannel\":5,\"notifyUserId\":1},{\"alarmId\":7,\"notifyChannel\":5,\"notifyUserId\":2}],\"view\":{\"alarmExpression\":\"avg(last_5m)avg:system.cpu.user{#address:wuhan,!host:paas-177}by{host}>123.0\",\"alarmId\":7,\"alarmLastValue\":\"UP\",\"alarmName\":\"static_metric\",\"alarmStatus\":1,\"alarmType\":2,\"alarmTypeJoin\":3,\"createTime\":\"2017-06-28 17:25:52.0\",\"createUserId\":1,\"isDisable\":false,\"lastAlarmTime\":\"2017-06-28 17:25:27.0\",\"metricName\":\"system.cpu.user\",\"metricTag\":\"#address:wuhan\",\"updateTime\":\"2017-06-29 15:49:18.0\"}},\"alarmId\":7,\"allMark\":{\"avg:system.cpu.user{host:cfeng-4,#address:wuhan,!host:paas-177}\":{\"changePutTime\":true,\"lastPutTsdbTime\":1499655343,\"lastSuccessCheckTime\":1499655349,\"series\":\"avg:system.cpu.user{host:cfeng-4,#address:wuhan,!host:paas-177}\",\"tagMap\":{\"host\":\"cfeng-4\",\"#address\":\"wuhan\",\"!host\":\"paas-177\"}}},\"joinType\":3,\"useMetricUnit\":\"percent\",\"validataDetails\":{\"status\":0,\"validataMerges\":[{\"alarmMarkDto\":{\"changePutTime\":true,\"lastPutTsdbTime\":1499655343,\"lastSuccessCheckTime\":1499655349,\"series\":\"avg:system.cpu.user{host:cfeng-4,#address:wuhan,!host:paas-177}\",\"tagMap\":{\"host\":\"cfeng-4\",\"#address\":\"wuhan\",\"!host\":\"paas-177\"}},\"status\":0,\"tag\":\"host:cfeng-4\",\"validataNodata\":{\"currentTime\":1499655349,\"isNodata\":false,\"lastSuccessCheckTime\":1499655349,\"series\":\"avg:system.cpu.user{host:cfeng-4,#address:wuhan,!host:paas-177}\",\"tag\":{\"host\":\"cfeng-4\",\"#address\":\"wuhan\",\"!host\":\"paas-177\"},\"thresholdTime\":60},\"validataStatic\":{\"converToThresholdValue\":123.0,\"end\":1499655343,\"intervalAggregator\":\"avg\",\"isAlart\":true,\"operator\":1,\"series\":\"avg:system.cpu.user{host:cfeng-4,#address:wuhan,!host:paas-177}\",\"start\":1499655043,\"sysUnit\":\"percent\",\"tag\":{\"#address\":\"wuhan\",\"host\":\"cfeng-4\",\"!host\":\"paas-177\"},\"thresholdTime\":300,\"thresholdValue\":\"123\",\"value\":5.715769243240357}}],\"validataTimeSeconds\":1499655349}}";
String jsonstr1 = "{\"alarmDetails\":{\"conditionDetails\":{\"alarmId\":7,\"alarmNodataNotifyTime\":1,\"alarmNowSeriesWaitTime\":2},\"conditionStatic\":{\"alarmId\":7,\"conditionAggregate\":\"avg\",\"conditionOperator\":1,\"conditionThresholdTime\":5,\"conditionThresholdValue\":\"123\"},\"metricDetails\":{\"alarmId\":7,\"metricAggregater\":\"avg\",\"metricBy\":\"host\",\"metricExcludeTag\":\"host:paas-177\",\"metricName\":\"system.cpu.user\",\"metricQ\":\"avg:system.cpu.user{#address:wuhan,!host:paas-177}by{host}\",\"metricTag\":\"#address:wuhan\"},\"notify\":[{\"alarmId\":7,\"notifyChannel\":5,\"notifyUserId\":1},{\"alarmId\":7,\"notifyChannel\":5,\"notifyUserId\":2}],\"view\":{\"alarmExpression\":\"avg(last_5m)avg:system.cpu.user{#address:wuhan,!host:paas-177}by{host}>123.0\",\"alarmId\":7,\"alarmLastValue\":\"UP\",\"alarmName\":\"static_metric\",\"alarmStatus\":1,\"alarmType\":2,\"alarmTypeJoin\":3,\"createTime\":\"2017-06-28 17:25:52.0\",\"createUserId\":1,\"isDisable\":false,\"lastAlarmTime\":\"2017-06-28 17:25:27.0\",\"metricName\":\"system.cpu.user\",\"metricTag\":\"#address:wuhan\",\"updateTime\":\"2017-06-29 15:49:18.0\"}},\"alarmId\":7,\"allMark\":{\"avg:system.cpu.user{host:cfeng-4,#address:wuhan,!host:paas-177}\":{\"changePutTime\":true,\"lastPutTsdbTime\":1499655374,\"lastSuccessCheckTime\":1499655379,\"series\":\"avg:system.cpu.user{host:cfeng-4,#address:wuhan,!host:paas-177}\",\"tagMap\":{\"host\":\"cfeng-4\",\"#address\":\"wuhan\",\"!host\":\"paas-177\"}}},\"joinType\":3,\"useMetricUnit\":\"percent\",\"validataDetails\":{\"status\":0,\"validataMerges\":[{\"alarmMarkDto\":{\"changePutTime\":true,\"lastPutTsdbTime\":1499655374,\"lastSuccessCheckTime\":1499655379,\"series\":\"avg:system.cpu.user{host:cfeng-4,#address:wuhan,!host:paas-177}\",\"tagMap\":{\"host\":\"cfeng-4\",\"#address\":\"wuhan\",\"!host\":\"paas-177\"}},\"status\":0,\"tag\":\"host:cfeng-4\",\"validataNodata\":{\"currentTime\":1499655379,\"isNodata\":false,\"lastSuccessCheckTime\":1499655379,\"series\":\"avg:system.cpu.user{host:cfeng-4,#address:wuhan,!host:paas-177}\",\"tag\":{\"host\":\"cfeng-4\",\"#address\":\"wuhan\",\"!host\":\"paas-177\"},\"thresholdTime\":60},\"validataStatic\":{\"converToThresholdValue\":123.0,\"end\":1499655374,\"intervalAggregator\":\"avg\",\"isAlart\":true,\"operator\":1,\"series\":\"avg:system.cpu.user{host:cfeng-4,#address:wuhan,!host:paas-177}\",\"start\":1499655074,\"sysUnit\":\"percent\",\"tag\":{\"#address\":\"wuhan\",\"host\":\"cfeng-4\",\"!host\":\"paas-177\"},\"thresholdTime\":300,\"thresholdValue\":\"123\",\"value\":5.089640821729388}}],\"validataTimeSeconds\":1499655379}}";
Set set = new HashSet();
set.add(jsonstr0);
set.add(jsonstr1);
Gson gs = new Gson();
List // （ ）
HashMap paramMap = new HashMap();
paramMap.put("hostid", mHostId);
paramMap.put("ptype", dto.getPtype());
paramMap.put("type_flag", dto.getTypeFlag());
paramMap.put("api_key", apikey);
String resStr = HttpUtils.get(DEVICE_INFO_URL, paramMap);
JSONObject jobj = JSON.parseObject(resStr);
JSONObject obj = (JSONObject)jobj.get("result");
if(obj.size() != 0){
String restr = jobj.get("result").toString();
DeviceInfoDto deviceInfoDto = new Gson().fromJson(restr, DeviceInfoDto.class);
dto.setDeviceInfo(deviceInfoDto);
} List