I'm trying to parse numbers from a json string and print them onto a file.
But for this I want to access elements inside an array which happens to have another object like structure which is quite confusing for a beginner like me.
I'm trying this in java so any help would be appreciated.
This is the json string
我正在尝试从json字符串中解析数字并将它们打印到文件中。但是对于这个我想要访问数组中的元素，这些元素碰巧有另一个像结构这样的对象，这对于像我这样的初学者来说非常混乱。我在java中尝试这个，所以任何帮助将不胜感激。这是json字符串
{
"result": [{
"landmark": {
"mouth_upper_lip_left_contour2": {
"y": 69.744333,
"x": 38.365625
},
"contour_chin": {
"y": 96.31,
"x": 51.339375
},
"mouth_lower_lip_right_contour3": {
"y": 80.073667,
"x": 60.077292
},
"contour_right9": {
"y": 94.413333,
"x": 63.012917
},
"mouth_upper_lip_left_contour1": {
"y": 69.0625,
"x": 47.247917
},
"right_eyebrow_lower_middle": {
"y": 31.333167,
"x": 73.863333
},
"left_eyebrow_lower_middle": {
"y": 31.549,
"x": 27.828542
},
"mouth_upper_lip_left_contour3": {
"y": 71.7415,
"x": 41.557292
},
"left_eyebrow_lower_left_quarter": {
"y": 31.958833,
"x": 21.760625
},
"right_eyebrow_lower_left_quarter": {
"y": 32.3125,
"x": 67.909583
},
"right_eyebrow_lower_right_quarter": {
"y": 31.311333,
"x": 80.055208
},
"nose_contour_left1": {
"y": 42.271667,
"x": 45.802083
},
"left_eyebrow_upper_left_quarter": {
"y": 30.283333,
"x": 21.247083
},
"left_eye_bottom": {
"y": 43.398167,
"x": 31.089375
},
"mouth_lower_lip_bottom": {
"y": 81.3855,
"x": 50.812708
},
"contour_right7": {
"y": 85.205167,
"x": 78.894583
},
"left_eyebrow_left_corner": {
"y": 33.749,
"x": 16.962646
},
"contour_right6": {
"y": 79.771833,
"x": 84.246042
},
"right_eye_lower_right_quarter": {
"y": 41.866667,
"x": 75.888542
},
"right_eye_bottom": {
"y": 42.5745,
"x": 71.683333
},
"contour_left7": {
"y": 85.123167,
"x": 24.153542
},
"contour_left6": {
"y": 78.593667,
"x": 18.146583
},
"contour_left5": {
"y": 72.296667,
"x": 13.481042
},
"contour_left4": {
"y": 64.880833,
"x": 10.959458
},
"contour_left3": {
"y": 57.225667,
"x": 9.674896
},
"contour_left2": {
"y": 50.2025,
"x": 8.638583
},
"contour_left1": {
"y": 41.911,
"x": 9.503813
},
"left_eye_lower_left_quarter": {
"y": 42.6945,
"x": 26.42125
},
"contour_right1": {
"y": 41.189833,
"x": 92.211458
},
"contour_right3": {
"y": 57.5375,
"x": 92.1
},
"contour_right2": {
"y": 48.95,
"x": 92.823542
},
"contour_right5": {
"y": 72.925333,
"x": 88.356458
},
"contour_right4": {
"y": 65.2235,
"x": 90.749583
},
"contour_left9": {
"y": 94.546667,
"x": 40.728333
},
"contour_left8": {
"y": 90.514667,
"x": 31.56625
},
"nose_right": {
"y": 60.715333,
"x": 64.148125
},
"right_eye_upper_right_quarter": {
"y": 39.302,
"x": 75.846042
},
"nose_contour_right3": {
"y": 62.9135,
"x": 57.44375
},
"nose_contour_lower_middle": {
"y": 64.059167,
"x": 50.642083
},
"right_eye_top": {
"y": 38.7445,
"x": 71.181458
},
"right_eye_right_corner": {
"y": 41.363,
"x": 78.832917
},
"mouth_upper_lip_right_contour1": {
"y": 69.000667,
"x": 55.375625
},
"mouth_upper_lip_right_contour2": {
"y": 69.407167,
"x": 63.850833
},
"mouth_upper_lip_right_contour3": {
"y": 71.284167,
"x": 62.032292
},
"left_eye_left_corner": {
"y": 41.623,
"x": 22.466042
},
"mouth_right_corner": {
"y": 70.449333,
"x": 72.33625
},
"mouth_lower_lip_right_contour1": {
"y": 75.625667,
"x": 63.582708
},
"contour_right8": {
"y": 90.280167,
"x": 70.933958
},
"left_eyebrow_right_corner": {
"y": 33.2645,
"x": 40.150417
},
"right_eye_center": {
"y": 40.730667,
"x": 71.312917
},
"left_eye_upper_right_quarter": {
"y": 39.773333,
"x": 35.361667
},
"mouth_upper_lip_top": {
"y": 69.256833,
"x": 51.340625
},
"nose_left": {
"y": 60.0965,
"x": 37.100625
},
"left_eye_upper_left_quarter": {
"y": 39.500833,
"x": 26.438542
},
"left_eye_center": {
"y": 41.167667,
"x": 30.930833
},
"left_eye_lower_right_quarter": {
"y": 42.8465,
"x": 35.399167
},
"right_eyebrow_left_corner": {
"y": 33.184833,
"x": 61.318958
},
"right_eye_left_corner": {
"y": 42.366333,
"x": 62.163958
},
"mouth_lower_lip_top": {
"y": 77.392833,
"x": 51.08625
},
"right_eyebrow_right_corner": {
"y": 32.929667,
"x": 84.607917
},
"mouth_lower_lip_left_contour1": {
"y": 75.426833,
"x": 40.790625
},
"left_eye_pupil": {
"y": 40.962,
"x": 32.3075
},
"mouth_left_corner": {
"y": 70.978333,
"x": 31.551458
},
"right_eyebrow_upper_left_quarter": {
"y": 29.9845,
"x": 67.1625
},
"right_eyebrow_upper_right_quarter": {
"y": 29.779167,
"x": 79.733125
},
"right_eye_lower_left_quarter": {
"y": 42.326333,
"x": 66.72625
},
"nose_tip": {
"y": 58.352833,
"x": 50.439375
},
"right_eye_upper_left_quarter": {
"y": 39.570333,
"x": 66.551458
},
"left_eyebrow_upper_middle": {
"y": 29.425833,
"x": 28.171667
},
"mouth_lower_lip_right_contour2": {
"y": 75.885167,
"x": 67.871875
},
"mouth_lower_lip_left_contour3": {
"y": 80.028667,
"x": 41.727292
},
"nose_contour_left2": {
"y": 54.835333,
"x": 41.098125
},
"nose_contour_left3": {
"y": 62.931167,
"x": 43.509375
},
"nose_contour_right1": {
"y": 42.119,
"x": 56.340625
},
"nose_contour_right2": {
"y": 54.3045,
"x": 60.037917
},
"mouth_lower_lip_left_contour2": {
"y": 75.988833,
"x": 36.259375
},
"right_eyebrow_upper_middle": {
"y": 29.119333,
"x": 73.216875
},
"left_eyebrow_lower_right_quarter": {
"y": 32.342667,
"x": 33.74875
},
"left_eye_top": {
"y": 38.792167,
"x": 30.875208
},
"left_eye_right_corner": {
"y": 42.65,
"x": 39.908958
},
"left_eyebrow_upper_right_quarter": {
"y": 29.944333,
"x": 34.1775
},
"right_eye_pupil": {
"y": 40.599833,
"x": 71.348542
},
"mouth_upper_lip_bottom": {
"y": 72.635667,
"x": 51.448125
}
},
"face_id": "4d78dafb9aec7f8f9e2c0c79bebebfc1"
}],
"session_id": "8d8947da289b4beda33882f4fc8fe680"
}
This is my java code and it works fine till line 18, but unfortunately it gives me an exception at line 19
这是我的java代码，直到第18行才能正常工作，但不幸的是它在第19行给了我一个例外
package faceplus;
import org.json.JSONArray;
import org.json.JSONObject;
import java.io.File;
import org.apache.commons.io.FileUtils;
public class FacePlus {
@SuppressWarnings("unchecked")
public static void main(String[] args) {
try {
File file = new File("C:\\Users\\sandesh\\Documents\\NetBeansProjects\\FacePlusPlus\\src\\faceplusplus\\file1.json");
String s1 = FileUtils.readFileToString(file);
JSONObject root = new JSONObject(s1);
JSONArray sportsArray = root.getJSONArray("result");
JSONObject landmark = sportsArray.getJSONObject(0);
JSONObject mouth_upper_lip_left_contour2 = landmark.getJSONObject("mouth_upper_lip_left_contour2");
} catch (Exception e) {
e.printStackTrace();
}
}
}
This is the exception
这是个例外
`run:
org.json.JSONException: JSONObject["mouth_upper_lip_left_contour2"] not found.
at org.json.JSONObject.get(JSONObject.java:475)
at org.json.JSONObject.getJSONObject(JSONObject.java:640)
at faceplus.FacePlus.main(FacePlus.java:18)
BUILD SUCCESSFUL (total time: 0 seconds)`
Ive printed the landmark object which seems to be fine plus I also tried to output the attribute "face_id"
香港专业教育学院印刷了看似很好的标志性物品加上我也尝试输出属性“face_id”
String id = landmark.getString("face_id");
System.out.println(landmark.toString());
System.out.println(id);
this gives output:
{"face_id":"4d78dafb9aec7f8f9e2c0c79bebebfc1","landmark":{"left_eyebrow_lower_left_quarter":{"x":21.760625,"y":31.958833},"left_eye_lower_right_quarter":{"x":35.399167,"y":42.8465},"left_eye_top":{"x":30.875208,"y":38.792167},"right_eye_left_corner":{"x":62.163958,"y":42.366333},"left_eye_pupil":{"x":32.3075,"y":40.962},"right_eyebrow_lower_middle":{"x":73.863333,"y":31.333167},"left_eye_upper_right_quarter":{"x":35.361667,"y":39.773333},"mouth_lower_lip_left_contour1":{"x":40.790625,"y":75.426833},"right_eye_top":{"x":71.181458,"y":38.7445},"mouth_lower_lip_left_contour3":{"x":41.727292,"y":80.028667},"mouth_lower_lip_left_contour2":{"x":36.259375,"y":75.988833},"right_eye_bottom":{"x":71.683333,"y":42.5745},"nose_contour_right3":{"x":57.44375,"y":62.9135},"right_eye_upper_right_quarter":{"x":75.846042,"y":39.302},"nose_contour_right1":{"x":56.340625,"y":42.119},"nose_contour_right2":{"x":60.037917,"y":54.3045},"left_eye_right_corner":{"x":39.908958,"y":42.65},"nose_tip":{"x":50.439375,"y":58.352833},"right_eyebrow_upper_middle":{"x":73.216875,"y":29.119333},"mouth_lower_lip_right_contour1":{"x":63.582708,"y":75.625667},"nose_contour_left3":{"x":43.509375,"y":62.931167},"mouth_lower_lip_right_contour2":{"x":67.871875,"y":75.885167},"nose_contour_left2":{"x":41.098125,"y":54.835333},"mouth_lower_lip_right_contour3":{"x":60.077292,"y":80.073667},"mouth_upper_lip_left_contour3":{"x":41.557292,"y":71.7415},"nose_contour_left1":{"x":45.802083,"y":42.271667},"mouth_upper_lip_bottom":{"x":51.448125,"y":72.635667},"left_eyebrow_lower_middle":{"x":27.828542,"y":31.549},"right_eye_lower_left_quarter":{"x":66.72625,"y":42.326333},"left_eyebrow_upper_left_quarter":{"x":21.247083,"y":30.283333},"mouth_upper_lip_left_contour1":{"x":47.247917,"y":69.0625},"mouth_upper_lip_left_contour2":{"x":38.365625,"y":69.744333},"contour_chin":{"x":51.339375,"y":96.31},"right_eye_center":{"x":71.312917,"y":40.730667},"left_eye_center":{"x":30.930833,"y":41.167667},"right_eyebrow_upper_right_quarter":{"x":79.733125,"y":29.779167},"contour_right7":{"x":78.894583,"y":85.205167},"left_eye_lower_left_quarter":{"x":26.42125,"y":42.6945},"mouth_right_corner":{"x":72.33625,"y":70.449333},"contour_right8":{"x":70.933958,"y":90.280167},"contour_right9":{"x":63.012917,"y":94.413333},"right_eyebrow_upper_left_quarter":{"x":67.1625,"y":29.9845},"right_eye_right_corner":{"x":78.832917,"y":41.363},"left_eyebrow_lower_right_quarter":{"x":33.74875,"y":32.342667},"right_eyebrow_right_corner":{"x":84.607917,"y":32.929667},"nose_left":{"x":37.100625,"y":60.0965},"mouth_lower_lip_top":{"x":51.08625,"y":77.392833},"right_eye_pupil":{"x":71.348542,"y":40.599833},"mouth_upper_lip_right_contour2":{"x":63.850833,"y":69.407167},"left_eyebrow_upper_middle":{"x":28.171667,"y":29.425833},"mouth_upper_lip_right_contour3":{"x":62.032292,"y":71.284167},"mouth_upper_lip_right_contour1":{"x":55.375625,"y":69.000667},"mouth_upper_lip_top":{"x":51.340625,"y":69.256833},"right_eye_lower_right_quarter":{"x":75.888542,"y":41.866667},"mouth_left_corner":{"x":31.551458,"y":70.978333},"left_eye_left_corner":{"x":22.466042,"y":41.623},"nose_contour_lower_middle":{"x":50.642083,"y":64.059167},"right_eyebrow_left_corner":{"x":61.318958,"y":33.184833},"right_eyebrow_lower_left_quarter":{"x":67.909583,"y":32.3125},"right_eyebrow_lower_right_quarter":{"x":80.055208,"y":31.311333},"left_eyebrow_left_corner":{"x":16.962646,"y":33.749},"contour_left4":{"x":10.959458,"y":64.880833},"contour_left5":{"x":13.481042,"y":72.296667},"left_eye_upper_left_quarter":{"x":26.438542,"y":39.500833},"contour_left6":{"x":18.146583,"y":78.593667},"contour_left7":{"x":24.153542,"y":85.123167},"contour_left8":{"x":31.56625,"y":90.514667},"contour_left9":{"x":40.728333,"y":94.546667},"mouth_lower_lip_bottom":{"x":50.812708,"y":81.3855},"left_eye_bottom":{"x":31.089375,"y":43.398167},"left_eyebrow_right_corner":{"x":40.150417,"y":33.2645},"right_eye_upper_left_quarter":{"x":66.551458,"y":39.570333},"contour_right1":{"x":92.211458,"y":41.189833},"contour_right2":{"x":92.823542,"y":48.95},"nose_right":{"x":64.148125,"y":60.715333},"contour_right3":{"x":92.1,"y":57.5375},"contour_left1":{"x":9.503813,"y":41.911},"contour_right4":{"x":90.749583,"y":65.2235},"contour_left2":{"x":8.638583,"y":50.2025},"contour_right5":{"x":88.356458,"y":72.925333},"contour_right6":{"x":84.246042,"y":79.771833},"contour_left3":{"x":9.674896,"y":57.225667},"left_eyebrow_upper_right_quarter":{"x":34.1775,"y":29.944333}}} 4d78dafb9aec7f8f9e2c0c79bebebfc1
这给出了输出：{“face_id”：“4d78dafb9aec7f8f9e2c0c79bebebfc1”，“landmark”：{“left_eyebrow_lower_left_quarter”：{“x”：21.760625，“y”：31.958833}，“left_eye_lower_right_quarter”：{“x”：35.399167，“y” ：42.8465}， “left_eye_top”：{ “×”：30.875208， “Y”：38.792167}， “right_eye_left_corner”：{ “×”：62.163958， “Y”：42.366333}， “left_eye_pupil”：{ “×”：32.3075 ， “Y”：40.962}， “right_eyebrow_lower_middle”：{ “×”：73.863333， “Y”：31.333167}， “left_eye_upper_right_quarter”：{ “×”：35.361667， “Y”：39.773333}， “mouth_lower_lip_left_contour1”：{” X “：40.790625，” Y “：75.426833}，” right_eye_top “：{” × “：71.181458，” Y “：38.7445}，” mouth_lower_lip_left_contour3 “：{” × “：41.727292，” Y “：80.028667}，” mouth_lower_lip_left_contour2 “：{” × “：36.259375，” Y “：75.988833}，” right_eye_bottom “：{” × “：71.683333，” Y “：42.5745}，” nose_contour_right3 “：{” × “：57.44375，” Y“：62.9135 }， “right_eye_upper_right_quarter”：{ “×”：75.846042， “Y”：39.302}， “nose_contour_right1”：{ “×”：56.340625， “Y”：42.119}， “nose_contour_right2”：{ “×”：60.037917，” Y “：54.3045}，” left_eye_right_corner “：{” × “：39.908958，” Y “：42.65}，” 鼻子_tip “：{” × “：50.439375，” Y “：58.352833}，” right_eyebrow_upper_middle “：{” × “：73.216875，” Y “：29.119333}，” mouth_lower_lip_right_contour1 “：{” × “：63.582708，” Y“： 75.625667}， “nose_contour_left3”：{ “×”：43.509375， “Y”：62.931167}， “mouth_lower_lip_right_contour2”：{ “×”：67.871875， “Y”：75.885167}， “nose_contour_left2”：{ “×”：41.098125， “Y”：54.835333}， “mouth_lower_lip_right_contour3”：{ “×”：60.077292， “Y”：80.073667}， “mouth_upper_lip_left_contour3”：{ “×”：41.557292， “Y”：71.7415}， “nose_contour_left1”：{“× “：45.802083，” Y “：42.271667}，” mouth_upper_lip_bottom “：{” × “：51.448125，” Y “：72.635667}，” left_eyebrow_lower_middle “：{” × “：27.828542，” Y “：31.549}，” right_eye_lower_left_quarter” ：{ “×”：66.72625， “Y”：42.326333}， “left_eyebrow_upper_left_quarter”：{ “×”：21.247083， “Y”：30.283333}， “mouth_upper_lip_left_contour1”：{ “×”：47.247917， “Y”：69.0625} “mouth_upper_lip_left_contour2”：{ “×”：38.365625， “Y”：69.744333}， “contour_chin”：{ “×”：51.339375， “Y”：96.31}， “right_eye_center”：{ “×”：71.312917，“Y “：40.730667}，” left_eye_center “：{” × “：30.930833，” Y “：41.167667}，” right_ey ebrow_upper_right_quarter “：{” × “：79.733125，” Y “：29.779167}，” contour_right7 “：{” × “：78.894583，” Y “：85.205167}，” left_eye_lower_left_quarter “：{” × “：26.42125，” Y“： 42.6945}， “mouth_right_corner”：{ “×”：72.33625， “Y”：70.449333}， “contour_right8”：{ “×”：70.933958， “Y”：90.280167}， “contour_right9”：{ “×”：63.012917， “Y”：94.413333}， “right_eyebrow_upper_left_quarter”：{ “×”：67.1625， “Y”：29.9845}， “right_eye_right_corner”：{ “×”：78.832917， “Y”：41.363}， “left_eyebrow_lower_right_quarter”：{“× “：33.74875，” Y “：32.342667}，” right_eyebrow_right_corner “：{” × “：84.607917，” Y “：32.929667}，” nose_left “：{” × “：37.100625，” Y “：60.0965}，” mouth_lower_lip_top” ：{ “×”：51.08625， “Y”：77.392833}， “right_eye_pupil”：{ “×”：71.348542， “Y”：40.599833}， “mouth_upper_lip_right_contour2”：{ “×”：63.850833， “Y”：69.407167} “left_eyebrow_upper_middle”：{ “×”：28.171667， “Y”：29.425833}， “mouth_upper_lip_right_contour3”：{ “×”：62.032292， “Y”：71.284167}， “mouth_upper_lip_right_contour1”：{ “×”：55.375625，“Y “：69.000667}，” mouth_upper_lip_top “：{” × “：51.340625，” Y “：69.256833}，” right_eye_lower_righ t_quarter “：{” × “：75.888542，” Y “：41.866667}，” mouth_left_corner “：{” × “：31.551458，” Y “：70.978333}，” left_eye_left_corner “：{” × “：22.466042，” Y“： 41.623}， “nose_contour_lower_middle”：{ “×”：50.642083， “Y”：64.059167}， “right_eyebrow_left_corner”：{ “×”：61.318958， “Y”：33.184833}， “right_eyebrow_lower_left_quarter”：{ “×”：67.909583， “Y”：32.3125}， “right_eyebrow_lower_right_quarter”：{ “×”：80.055208， “Y”：31.311333}， “left_eyebrow_left_corner”：{ “×”：16.962646， “Y”：33.749}， “contour_left4”：{“× “：10.959458，” Y “：64.880833}，” contour_left5 “：{” × “：13.481042，” Y “：72.296667}，” left_eye_upper_left_quarter “：{” × “：26.438542，” Y “：39.500833}，” contour_left6" ：{ “×”：18.146583， “Y”：78.593667}， “contour_left7”：{ “×”：24.153542， “Y”：85.123167}， “contour_left8”：{ “×”：31.56625， “Y”：90.514667} “contour_left9”：{ “×”：40.728333， “Y”：94.546667}， “mouth_lower_lip_bottom”：{ “×”：50.812708， “Y”：81.3855}， “left_eye_bottom”：{ “×”：31.089375，“Y “：43.398167}，” left_eyebrow_right_corner “：{” × “：40.150417，” Y “：33.2645}，” right_eye_upper_left_quarter “：{” × “：66.551458，” Y “：39.570333}，” contou r_right1 “：{” × “：92.211458，” Y “：41.189833}，” contour_right2 “：{” × “：92.823542，” Y “：48.95}，” nose_right “：{” × “：64.148125，” Y“： 60.715333}， “contour_right3”：{ “×”：92.1， “Y”：57.5375}， “contour_left1”：{ “×”：9.503813， “Y”：41.911}， “contour_right4”：{ “×”：90.749583， “Y”：65.2235}， “contour_left2”：{ “×”：8.638583， “Y”：50.2025}， “contour_right5”：{ “×”：88.356458， “Y”：72.925333}， “contour_right6”：{“× “：84.246042，”y“：79.771833}，”contour_left3“：{”x“：9.674896，”y“：57.225667}，”left_eyebrow_upper_right_quarter“：{”x“：34.1775，”y“：29.944333}}} 4d78dafb9aec7f8f9e2c0c79bebebfc1
1 个解决方案
#1
3
you can try this code block:
你可以尝试这个代码块：
try {
File file = new File("D:\\prectice\\JSONPrectice\\file.json");
String s1 = FileUtils.readFileToString(file);
JSONObject root = new JSONObject(s1);
JSONArray sportsArray = root.getJSONArray("result");
JSONObject arrayObject = sportsArray.getJSONObject(0);
JSONObject landmark = arrayObject.getJSONObject("landmark");
JSONObject mouth_upper_lip_left_contour2 = landmark.getJSONObject("mouth_upper_lip_left_contour2");
} catch (Exception e) {
e.printStackTrace();
}
you have missed to get JSONObject for landmark
你错过了JSONObject的标志性建筑
#1
3
you can try this code block:
你可以尝试这个代码块：
try {
File file = new File("D:\\prectice\\JSONPrectice\\file.json");
String s1 = FileUtils.readFileToString(file);
JSONObject root = new JSONObject(s1);
JSONArray sportsArray = root.getJSONArray("result");
JSONObject arrayObject = sportsArray.getJSONObject(0);
JSONObject landmark = arrayObject.getJSONObject("landmark");
JSONObject mouth_upper_lip_left_contour2 = landmark.getJSONObject("mouth_upper_lip_left_contour2");
} catch (Exception e) {
e.printStackTrace();
}
you have missed to get JSONObject for landmark
你错过了JSONObject的标志性建筑