如何获得纯 JSON 字符串而不是 HTML
[英]How do I get a pure JSON string instead of HTML
问题描述
尝试从 JAVA 中的 URL 获取 JSON-LD 数据。 但结果显示在 HTML 中。
就在 JSON 数据开始之前，它会显示此消息。
<!doctype html><!-- This is an HTML rendering of the ConceptNet API response. We're showing you HTML so you get convenient syntax highlighting and links, because we think you're seeing this in a Web browser, based on your 'Accept: text/html' header. If you're using a client that isn't a Web browser, you probably wanted pure JSON. In that case, set the header 'Accept: */*' or 'Accept: application/json' on your request, or add the '?format=json' parameter.
如何设置适当的标头以获取纯 JSON 格式而不是 HTML 格式的字符串。
代码是
import java.net.HttpURLConnection;
import java.net.MalformedURLException;
import java.net.URL;
import java.net.http.HttpResponse;
import java.util.Scanner;
public class test{
public static void main(String[] args) throws IOException {
URL url=new URL("http://api.conceptnet.io/c/en/french_toast");
HttpURLConnection conn=(HttpURLConnection)url.openConnection();
conn.setRequestMethod("GET");
conn.connect();
int responsecode=conn.getResponseCode();
System.out.println(responsecode);
if(responsecode!=200){
throw new RuntimeException("HttpResponseCode:"+responsecode);
}
else{
Scanner sc=new Scanner(url.openStream());
String inline="";
while(sc.hasNext()){
inline+=sc.nextLine();
}
System.out.println("\nJson data in String format");
System.out.println(inline);
sc.close();
}
}
}
4 个解决方案
解决方案1
1 2020-02-10 19:11:40
好的，由于您使用的是 HttpURLConnection，因此您可以使用一种方法来设置标头，就像这样。
HttpURLConnection conn = (HttpURLConnection)url.openConnection();
conn.setRequestProperty("Accept", "application/json");
解决方案2
1 2020-02-10 19:26:32
使用 HTML 解析器，例如jsoup 。
import java.io.IOException;
import java.net.URL;
import org.jsoup.Jsoup;
public class Main {
public static void main(String args[]) throws IOException {
System.out.println(Jsoup.parse(new URL("http://api.conceptnet.io/c/en/french_toast"), 10000).body().text());
}
}
输出：
{
"@context": [
"http://api.conceptnet.io/ld/conceptnet5.7/context.ld.json"
],
"@id": "/c/en/french_toast",
"edges": [
{
...
...
...
解决方案3
1 已采纳 2020-02-10 20:48:54
请在您的 URL 末尾添加?format=json ，无需更多操作。
喜欢：
URL url=new URL("http://api.conceptnet.io/c/en/french_toast?format=json");
您的代码：
public static void main(String[] args) throws IOException {
//Only this line (Url) has been edited (?format=json added)
URL url = new URL("http://api.conceptnet.io/c/en/french_toast?format=json");
HttpURLConnection conn = (HttpURLConnection) url.openConnection();
conn.setRequestMethod("GET");
conn.connect();
int responsecode = conn.getResponseCode();
System.out.println(responsecode);
if (responsecode != 200) {
throw new RuntimeException("HttpResponseCode:" + responsecode);
} else {
Scanner sc = new Scanner(url.openStream());
String inline = "";
while (sc.hasNext()) {
inline += sc.nextLine();
}
System.out.println("\nJson data in String format");
System.out.println(inline);
sc.close();
}
}
结果 ：
Json data in String format
{"@context": ["http://api.conceptnet.io/ld/conceptnet5.7/context.ld.json"], "@id": "/c/en/french_toast", "edges": [{"@id": "/a/[/r/Synonym/,/c/fr/pain_perdu/n/wn/food/,/c/en/french_toast/n/wn/food/]", "@type": "Edge", "dataset": "/d/wordnet/3.1", "end": {"@id": "/c/en/french_toast/n/wn/food", "@type": "Node", "label": "French toast", "language": "en", "sense_label": "n, food", "term": "/c/en/french_toast"}, "license": "cc:by/4.0", "rel": {"@id": "/r/Synonym", "@type": "Relation", "label": "Synonym"}, "sources": [{"@id": "/s/resource/wordnet/rdf/3.1", "@type": "Source", "contributor": "/s/resource/wordnet/rdf/3.1"}], "start": {"@id": "/c/fr/pain_perdu/n/wn/food", "@type": "Node", "label": "Pain perdu", "language": "fr", "sense_label": "n, food", "term": "/c/fr/pain_perdu"}, "surfaceText": "[[Pain perdu]] is a translation of [[French toast]]", "weight": 3.4641016151377544}, {"@id": "/a/[/r/Synonym/,/c/pt/rabanada/n/wn/food/,/c/en/french_toast/n/wn/food/]", "@type": "Edge", "dataset": "/d/wordnet/3.1", "end": {"@id": "/c/en/french_toast/n/wn/food", "@type": "Node", "label": "French toast", "language": "en", "sense_label": "n, food", "term": "/c/en/french_toast"}, "license": "cc:by/4.0", "rel": {"@id": "/r/Synonym", "@type": "Relation", "label": "Synonym"}, "sources": [{"@id": "/s/resource/wordnet/rdf/3.1", "@type": "Source", "contributor": "/s/resource/wordnet/rdf/3.1"}], "start": {"@id": "/c/pt/rabanada/n/wn/food", "@type": "Node", "label": "rabanada", "language": "pt", "sense_label": "n, food", "term": "/c/pt/rabanada"}, "surfaceText": "[[rabanada]] is a translation of [[French toast]]", "weight": 2.0}, {"@id": "/a/[/r/Synonym/,/c/ja/フレンチトースト/n/wn/food/,/c/en/french_toast/n/wn/food/]", "@type": "Edge", "dataset": "/d/wordnet/3.1", "end": {"@id": "/c/en/french_toast/n/wn/food", "@type": "Node", "label": "French toast", "language": "en", "sense_label": "n, food", "term": "/c/en/french_toast"}, "license": "cc:by/4.0", "rel": {"@id": "/r/Synonym", "@type": "Relation", "label": "Synonym"}, "sources": [{"@id": "/s/resource/wordnet/rdf/3.1", "@type": "Source", "contributor": "/s/resource/wordnet/rdf/3.1"}], "start": {"@id": "/c/ja/フレンチトースト/n/wn/food", "@type": "Node", "label": "フレンチトースト", "language": "ja", "sense_label": "n, food", "term": "/c/ja/フレンチトースト"}, "surfaceText": "[[フレンチトースト]] is a translation of [[French toast]]", "weight": 2.0}, {"@id": "/a/[/r/RelatedTo/,/c/en/french_toast/n/,/c/fr/pain_perdu/]", "@type": "Edge", "dataset": "/d/wiktionary/fr", "end": {"@id": "/c/fr/pain_perdu", "@type": "Node", "label": "pain perdu", "language": "fr", "term": "/c/fr/pain_perdu"}, "license": "cc:by-sa/4.0", "rel": {"@id": "/r/RelatedTo", "@type": "Relation", "label": "RelatedTo"}, "sources": [{"@id": "/and/[/s/process/wikiparsec/2/,/s/resource/wiktionary/fr/]", "@type": "Source", "contributor": "/s/resource/wiktionary/fr", "process": "/s/process/wikiparsec/2"}], "start": {"@id": "/c/en/french_toast/n", "@type": "Node", "label": "french toast", "language": "en", "sense_label": "n", "term": "/c/en/french_toast"}, "surfaceText": null, "weight": 2.0}, {"@id": "/a/[/r/Synonym/,/c/th/เฟรนช์โทสต์/n/wn/food/,/c/en/french_toast/n/wn/food/]", "@type": "Edge", "dataset": "/d/wordnet/3.1", "end": {"@id": "/c/en/french_toast/n/wn/food", "@type": "Node", "label": "French toast", "language": "en", "sense_label": "n, food", "term": "/c/en/french_toast"}, "license": "cc:by/4.0", "rel": {"@id": "/r/Synonym", "@type": "Relation", "label": "Synonym"}, "sources": [{"@id": "/s/resource/wordnet/rdf/3.1", "@type": "Source", "contributor": "/s/resource/wordnet/rdf/3.1"}], "start": {"@id": "/c/th/เฟรนช์โทสต์/n/wn/food", "@type": "Node", "label": "เฟรนช์โทสต์", "language": "th", "sense_label": "n, food", "term": "/c/th/เฟรนช์โทสต์"}, "surfaceText": "[[เฟรนช์โทสต์]] is a translation of [[French toast]]", "weight": 2.0}, {"@id": "/a/[/r/Synonym/,/c/ja/フレンチ_トースト/n/,/c/en/french_toast/]", "@type": "Edge", "dataset": "/d/jmdict", "end": {"@id": "/c/en/french_toast", "@type": "Node", "label": "french toast", "language": "en", "term": "/c/en/french_toast"}, "license": "cc:by-sa/4.0", "rel": {"@id": "/r/Synonym", "@type": "Relation", "label": "Synonym"}, "sources": [{"@id": "/s/resource/jmdict/1.07", "@type": "Source", "contributor": "/s/resource/jmdict/1.07"}], "start": {"@id": "/c/ja/フレンチ_トースト/n", "@type": "Node", "label": "フレンチ トースト", "language": "ja", "sense_label": "n", "term": "/c/ja/フレンチ_トースト"}, "surfaceText": null, "weight": 2.0}, {"@id": "/a/[/r/Synonym/,/c/fr/pain_doré/n/wn/food/,/c/en/french_toast/n/wn/food/]", "@type": "Edge", "dataset": "/d/wordnet/3.1", "end": {"@id": "/c/en/french_toast/n/wn/food", "@type": "Node", "label": "French toast", "language": "en", "sense_label": "n, food", "term": "/c/en/french_toast"}, "license": "cc:by/4.0", "rel": {"@id": "/r/Synonym", "@type": "Relation", "label": "Synonym"}, "sources": [{"@id": "/s/resource/wordnet/rdf/3.1", "@type": "Source", "contributor": "/s/resource/wordnet/rdf/3.1"}], "start": {"@id": "/c/fr/pain_doré/n/wn/food", "@type": "Node", "label": "pain doré", "language": "fr", "sense_label": "n, food", "term": "/c/fr/pain_doré"}, "surfaceText": "[[pain doré]] is a translation of [[French toast]]", "weight": 2.0}, {"@id": "/a/[/r/IsA/,/c/en/french_toast/n/wn/food/,/c/en/dish/n/wn/food/]", "@type": "Edge", "dataset": "/d/wordnet/3.1", "end": {"@id": "/c/en/dish/n/wn/food", "@type": "Node", "label": "dish", "language": "en", "sense_label": "n, food", "term": "/c/en/dish"}, "license": "cc:by/4.0", "rel": {"@id": "/r/IsA", "@type": "Relation", "label": "IsA"}, "sources": [{"@id": "/s/resource/wordnet/rdf/3.1", "@type": "Source", "contributor": "/s/resource/wordnet/rdf/3.1"}], "start": {"@id": "/c/en/french_toast/n/wn/food", "@type": "Node", "label": "French toast", "language": "en", "sense_label": "n, food", "term": "/c/en/french_toast"}, "surfaceText": "[[French toast]] is a type of [[dish]]", "weight": 2.0}, {"@id": "/a/[/r/Synonym/,/c/en/french_toast/n/,/c/sh/prženica/]", "@type": "Edge", "dataset": "/d/wiktionary/en", "end": {"@id": "/c/sh/prženica", "@type": "Node", "label": "prženica", "language": "sh", "term": "/c/sh/prženica"}, "license": "cc:by-sa/4.0", "rel": {"@id": "/r/Synonym", "@type": "Relation", "label": "Synonym"}, "sources": [{"@id": "/and/[/s/process/wikiparsec/2/,/s/resource/wiktionary/en/]", "@type": "Source", "contributor": "/s/resource/wiktionary/en", "process": "/s/process/wikiparsec/2"}], "start": {"@id": "/c/en/french_toast/n", "@type": "Node", "label": "french toast", "language": "en", "sense_label": "n", "term": "/c/en/french_toast"}, "surfaceText": null, "weight": 2.0}, {"@id": "/a/[/r/Synonym/,/c/ja/フレンチトースト/n/,/c/en/french_toast/]", "@type": "Edge", "dataset": "/d/jmdict", "end": {"@id": "/c/en/french_toast", "@type": "Node", "label": "french toast", "language": "en", "term": "/c/en/french_toast"}, "license": "cc:by-sa/4.0", "rel": {"@id": "/r/Synonym", "@type": "Relation", "label": "Synonym"}, "sources": [{"@id": "/s/resource/jmdict/1.07", "@type": "Source", "contributor": "/s/resource/jmdict/1.07"}], "start": {"@id": "/c/ja/フレンチトースト/n", "@type": "Node", "label": "フレンチトースト", "language": "ja", "sense_label": "n", "term": "/c/ja/フレンチトースト"}, "surfaceText": null, "weight": 2.0}, {"@id": "/a/[/r/Synonym/,/c/en/french_toast/n/,/c/zh/西多/]", "@type": "Edge", "dataset": "/d/wiktionary/en", "end": {"@id": "/c/zh/西多", "@type": "Node", "label": "西多", "language": "zh", "term": "/c/zh/西多"}, "license": "cc:by-sa/4.0", "rel": {"@id": "/r/Synonym", "@type": "Relation", "label": "Synonym"}, "sources": [{"@id": "/and/[/s/process/wikiparsec/2/,/s/resource/wiktionary/en/]", "@type": "Source", "contributor": "/s/resource/wiktionary/en", "process": "/s/process/wikiparsec/2"}], "start": {"@id": "/c/en/french_toast/n", "@type": "Node", "label": "french toast", "language": "en", "sense_label": "n", "term": "/c/en/french_toast"}, "surfaceText": null, "weight": 1.0}, {"@id": "/a/[/r/HasContext/,/c/en/french_toast/n/,/c/en/culinary/]", "@type": "Edge", "dataset": "/d/wiktionary/en", "end": {"@id": "/c/en/culinary", "@type": "Node", "label": "culinary", "language": "en", "term": "/c/en/culinary"}, "license": "cc:by-sa/4.0", "rel": {"@id": "/r/HasContext", "@type": "Relation", "label": "HasContext"}, "sources": [{"@id": "/and/[/s/process/wikiparsec/2/,/s/resource/wiktionary/en/]", "@type": "Source", "contributor": "/s/resource/wiktionary/en", "process": "/s/process/wikiparsec/2"}], "start": {"@id": "/c/en/french_toast/n", "@type": "Node", "label": "french toast", "language": "en", "sense_label": "n", "term": "/c/en/french_toast"}, "surfaceText": null, "weight": 1.0}, {"@id": "/a/[/r/ExternalURL/,/c/en/french_toast/n/wn/food/,/http://wordnet-rdf.princeton.edu/wn31/107884176-n/]", "@type": "Edge", "dataset": "/d/wordnet/3.1", "end": {"@id": "http://wordnet-rdf.princeton.edu/wn31/107884176-n", "@type": "Node", "label": "107884176-n", "site": "wordnet-rdf.princeton.edu", "site_available": true, "term": "http://wordnet-rdf.princeton.edu/wn31/107884176-n"}, "license": "cc:by-sa/4.0", "rel": {"@id": "/r/ExternalURL", "@type": "Relation", "label": "ExternalURL"}, "sources": [{"@id": "/s/resource/wordnet/rdf/3.1", "@type": "Source", "contributor": "/s/resource/wordnet/rdf/3.1"}], "start": {"@id": "/c/en/french_toast/n/wn/food", "@type": "Node", "label": "french toast", "language": "en", "sense_label": "n, food", "term": "/c/en/french_toast"}, "surfaceText": null, "weight": 1.0}, {"@id": "/a/[/r/Synonym/,/c/fr/pain_perdu/n/,/c/en/french_toast/]", "@type": "Edge", "dataset": "/d/wiktionary/fr", "end": {"@id": "/c/en/french_toast", "@type": "Node", "label": "french toast", "language": "en", "term": "/c/en/french_toast"}, "license": "cc:by-sa/4.0", "rel": {"@id": "/r/Synonym", "@type": "Relation", "label": "Synonym"}, "sources": [{"@id": "/and/[/s/process/wikiparsec/2/,/s/resource/wiktionary/fr/]", "@type": "Source", "contributor": "/s/resource/wiktionary/fr", "process": "/s/process/wikiparsec/2"}], "start": {"@id": "/c/fr/pain_perdu/n", "@type": "Node", "label": "pain perdu", "language": "fr", "sense_label": "n", "term": "/c/fr/pain_perdu"}, "surfaceText": null, "weight": 1.0}, {"@id": "/a/[/r/Synonym/,/c/en/french_toast/n/,/c/nl/wentelteefje/]", "@type": "Edge", "dataset": "/d/wiktionary/en", "end": {"@id": "/c/nl/wentelteefje", "@type": "Node", "label": "wentelteefje", "language": "nl", "term": "/c/nl/wentelteefje"}, "license": "cc:by-sa/4.0", "rel": {"@id": "/r/Synonym", "@type": "Relation", "label": "Synonym"}, "sources": [{"@id": "/and/[/s/process/wikiparsec/2/,/s/resource/wiktionary/en/]", "@type": "Source", "contributor": "/s/resource/wiktionary/en", "process": "/s/process/wikiparsec/2"}], "start": {"@id": "/c/en/french_toast/n", "@type": "Node", "label": "french toast", "language": "en", "sense_label": "n", "term": "/c/en/french_toast"}, "surfaceText": null, "weight": 1.0}, {"@id": "/a/[/r/ExternalURL/,/c/en/french_toast/,/http://wikidata.dbpedia.org/resource/Q197973/]", "@type": "Edge", "dataset": "/d/dbpedia/en", "end": {"@id": "http://wikidata.dbpedia.org/resource/Q197973", "@type": "Node", "label": "Q197973", "site": "wikidata.dbpedia.org", "site_available": true, "term": "http://wikidata.dbpedia.org/resource/Q197973"}, "license": "cc:by-sa/4.0", "rel": {"@id": "/r/ExternalURL", "@type": "Relation", "label": "ExternalURL"}, "sources": [{"@id": "/s/resource/dbpedia/2015/en", "@type": "Source", "contributor": "/s/resource/dbpedia/2015/en"}], "start": {"@id": "/c/en/french_toast", "@type": "Node", "label": "french toast", "language": "en", "term": "/c/en/french_toast"}, "surfaceText": null, "weight": 1.0}, {"@id": "/a/[/r/DerivedFrom/,/c/en/french_toast/,/c/en/french/a/]", "@type": "Edge", "dataset": "/d/wiktionary/en", "end": {"@id": "/c/en/french/a", "@type": "Node", "label": "french", "language": "en", "sense_label": "a", "term": "/c/en/french"}, "license": "cc:by-sa/4.0", "rel": {"@id": "/r/DerivedFrom", "@type": "Relation", "label": "DerivedFrom"}, "sources": [{"@id": "/and/[/s/process/wikiparsec/2/,/s/resource/wiktionary/en/]", "@type": "Source", "contributor": "/s/resource/wiktionary/en", "process": "/s/process/wikiparsec/2"}], "start": {"@id": "/c/en/french_toast", "@type": "Node", "label": "french toast", "language": "en", "term": "/c/en/french_toast"}, "surfaceText": null, "weight": 1.0}, {"@id": "/a/[/r/Synonym/,/c/en/french_toast/n/,/c/ms/roti_bakar/]", "@type": "Edge", "dataset": "/d/wiktionary/en", "end": {"@id": "/c/ms/roti_bakar", "@type": "Node", "label": "roti bakar", "language": "ms", "term": "/c/ms/roti_bakar"}, "license": "cc:by-sa/4.0", "rel": {"@id": "/r/Synonym", "@type": "Relation", "label": "Synonym"}, "sources": [{"@id": "/and/[/s/process/wikiparsec/2/,/s/resource/wiktionary/en/]", "@type": "Source", "contributor": "/s/resource/wiktionary/en", "process": "/s/process/wikiparsec/2"}], "start": {"@id": "/c/en/french_toast/n", "@type": "Node", "label": "french toast", "language": "en", "sense_label": "n", "term": "/c/en/french_toast"}, "surfaceText": null, "weight": 1.0}, {"@id": "/a/[/r/ExternalURL/,/c/en/french_toast/,/http://dbpedia.org/resource/French_toast/]", "@type": "Edge", "dataset": "/d/dbpedia/en", "end": {"@id": "http://dbpedia.org/resource/French_toast", "@type": "Node", "label": "French_toast", "site": "dbpedia.org", "site_available": true, "term": "http://dbpedia.org/resource/French_toast"}, "license": "cc:by-sa/4.0", "rel": {"@id": "/r/ExternalURL", "@type": "Relation", "label": "ExternalURL"}, "sources": [{"@id": "/s/resource/dbpedia/2015/en", "@type": "Source", "contributor": "/s/resource/dbpedia/2015/en"}], "start": {"@id": "/c/en/french_toast", "@type": "Node", "label": "french toast", "language": "en", "term": "/c/en/french_toast"}, "surfaceText": null, "weight": 1.0}, {"@id": "/a/[/r/Synonym/,/c/en/french_toast/n/,/c/zh/法兰西吐司/]", "@type": "Edge", "dataset": "/d/wiktionary/en", "end": {"@id": "/c/zh/法兰西吐司", "@type": "Node", "label": "法兰西吐司", "language": "zh", "term": "/c/zh/法兰西吐司"}, "license": "cc:by-sa/4.0", "rel": {"@id": "/r/Synonym", "@type": "Relation", "label": "Synonym"}, "sources": [{"@id": "/and/[/s/process/wikiparsec/2/,/s/resource/wiktionary/en/]", "@type": "Source", "contributor": "/s/resource/wiktionary/en", "process": "/s/process/wikiparsec/2"}], "start": {"@id": "/c/en/french_toast/n", "@type": "Node", "label": "french toast", "language": "en", "sense_label": "n", "term": "/c/en/french_toast"}, "surfaceText": null, "weight": 1.0}], "view": {"@id": "/c/en/french_toast?offset=0&limit=20", "@type": "PartialCollectionView", "comment": "There are more results. Follow the 'nextPage' link for more.", "firstPage": "/c/en/french_toast?offset=0&limit=20", "nextPage": "/c/en/french_toast?offset=20&limit=20", "paginatedProperty": "edges"}}
解决方案4
0 2020-02-10 19:14:12
使用 postman 或浏览器 rest api-plugin 之类的工具尝试相同的请求。
您可以使用这些工具修改您的请求标头，而浏览器则无法做到这一点。 将请求标头内容类型设置为 application/json 可以解决此问题。
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