JSONObject and URL as well as the use of HttpURLConnection

1 will turn into a java object class format json

First introduced dependent jar files

Note dependency file version numbers may not correspond to the high-class version

2 of my entity class contains inner classes pay attention to public inner class can be serialized to json format

import java.util.List;

public class EuityParam {

    public EuityParam(String filter,List<String> args)
    {
        super();
        this.filter=new Param0(filter);
        this.args=new Param1(args);
    }

    private Param1 args;
    
    public Param1 getArgs()
    {
        return args;
    }
    public void setArgs(Param1 _Param1)
    {
        this.args=_Param1;
    }
    
    private Param0 filter;
    
    public Param0 getFilter()
    {
        return filter;
    }
    public void setFilter(Param0 _param0)
    {
        this.filter=_param0;
    }
    public class Param1
    {
        public List<String> getNameList() {
            return nameList;
        }
        public void setNameList(List<String> nameList) {
            this.nameList = nameList;
        }
        public Param1(List<String> nameList)
        {
            this.nameList=nameList;
        }
        private List<String> nameList;
        
        
    }
    public class Param0
    {
        public Param0(String key)
        {
            this.key=key;
        }
        private String key;
        
        public String getKey() 
        {
            return key;
        }
        public void setKey(String key)
        {
            this.key=key;
        }
    }
    
    
}

3 Import Package File

import net.sf.json.JSONArray;
import net.sf.json.JSONObject;

4 sequence of

        List<String> nameLst=new LinkedList<String>();
        nameLst.add("AIR PRODUCTS & CHEMICALS INC");
        nameLst.add("AMAZON.COM INC");
        nameLst.add("ALTRIA GROUP INC");
        nameLst.add("APPLE INC");
        nameLst.add("ALPHABET INC");
        EuityParam euityParam=new EuityParam("EquityNameMatching", nameLst);
        
        JSONObject jsonData= JSONObject.fromObject(euityParam);
        System.out.println(jsonData);

5 results:

{
    "args": {
        "nameList": [
            "AIR PRODUCTS & CHEMICALS INC",
            "AMAZON.COM INC",
            "ALTRIA GROUP INC",
            "APPLE INC",
            "ALPHABET INC"
        ]
    },
    "filter": {
        "key": "EquityNameMatching"
    }
}

6 interface call, the call is post

private static String doPost(URL url, Map<Object, Object> nameValuePairs, String userAgent, int redirescts)
            throws IOException {
        // TODO Auto-generated method stub
        StringBuilder response = new StringBuilder();
        // HttpURLConnection可以处理重定向
        HttpURLConnection connect = (HttpURLConnection) url.openConnection();
        if (userAgent != null) {
            connect.setRequestProperty("Authorization", userAgent);//设置http请求头
        }
        if (redirescts >= 0) {
             // off before connecting to the server automatically redirect 
            connect.setFollowRedirects ( to false ); 
        } 
        // set request output stream 
        connect.setDoOutput ( to true );
         // build request to write data in the stream write request body 
        the OutputStream = OUT connect.getOutputStream ();
         the try (= Write the PrintWriter new new the PrintWriter (OUT)) {
             Boolean First = to true ;
             for (the Entry <Object, Object> pair: nameValuePairs.entrySet ()) {
                 IF (First) { 
                    First =false;
                } else {
                    write.print('&');
                }
                String name = pair.getKey().toString();
                String value = pair.getValue().toString();
                write.print(name);
                write.print('=');
                write.print(URLEncoder.encode(value, "UTF-8"));
            }
        }

        // 获取请求的编码类型
        String encoding = connect.getContentEncoding();
        if (encoding == null) { 
            Encoding = "UTF-. 8" ; 
        } 

        // If the redirect is greater than 0 indicates a redirection 
        IF (redirescts> 0 ) {
             // response code acquisition request 
            int responseCode = connect.getResponseCode ();
             IF (== responseCode the HttpURLConnection == || responseCode .HTTP_MOVED_PERM HttpURLConnection.HTTP_MOVED_TEMP
                     || responseCode == HttpURLConnection.HTTP_SEE_OTHER) { 

                // Get the redirected location 
                String connect.getHeaderField = lOCATION ( "the location" );
                 IF ! (lOCATION = null ) {
                    Base the java.net.URL = connect.getURL ();
                     // disconnect this connection 
                    connect.disconnect ();
                     return the doPost ( new new the URL (Base, LOCATION), namevaluepairs, the userAgent, redirescts -. 1 ); 
                } 
            } 
        } the else  IF (redirescts == 0 ) {
             the throw  new new IOException ( "redirection can not handle too much" ); 
        } 

        // Get the response stream 
        the InputStream responseStream = connect.getInputStream ();
         the try (Scanner in = new new Scanner(responseStream, encoding)) {
            while (in.hasNextLine()) {
                response.append(in.nextLine());
                response.append("\n");
            }
        } 
        catch (Exception e) 
        {
            // TODO: handle exception
            InputStream err = connect.getErrorStream();
            if (err == null) {
                throw e;
            }
            try (Scanner in = new Scanner(err)) {
                response.append(in.hasNextLine());

            }
        }
        return response.toString();
    }