可以使用CookieManager的HttpURLConnection请求get、post封装

逃离我推掉我的手 2023-01-04 11:58 175阅读 0赞

## pom依赖： ##

<dependency>
                <groupId>com.alibaba</groupId>
                <artifactId>fastjson</artifactId>
                <version>1.2.62</version>
            </dependency>

## `HttpUrlConnectionUtil.class`封装： ##

package com.zx.jdkill.test;
    
    import com.alibaba.fastjson.JSONObject;
    
    import java.io.FileOutputStream;
    import java.io.IOException;
    import java.io.InputStream;
    import java.io.OutputStream;
    import java.net.HttpURLConnection;
    import java.net.URL;
    import java.util.Iterator;
    
    /**
     * @author: zhaoxu
     * @date: 2021/1/5 22:26
     */
    public class HttpUrlConnectionUtil { 
        static private int length;
    
        /**
         * get请求
         * @param headers 请求头，可为空
         * @param url
         * @return
         * @throws IOException
         */
        public static String get(JSONObject headers, String url) throws IOException { 
            String response = "";
            HttpURLConnection httpURLConnection = (HttpURLConnection) (new URL(url).openConnection());
            httpURLConnection.setRequestMethod("GET");
            if (headers != null) { 
                Iterator<String> iterator = headers.keySet().iterator();
                while (iterator.hasNext()) { 
                    String headerName = iterator.next();
                    httpURLConnection.setRequestProperty(headerName, headers.get(headerName).toString());
                }
            }
            httpURLConnection.connect();
            if (httpURLConnection.getResponseCode() == 200) { 
                InputStream inputStream = httpURLConnection.getInputStream();
                byte[] buffer;
                buffer = new byte[1024];
                while ((length = inputStream.read(buffer)) != -1) { 
                    response = response + new String(buffer, 0, length, "UTF-8");
                }
                httpURLConnection.disconnect();
            }
            return response;
        }
    
        /**
         * post请求
         * @param headers 请求头，可为空
         * @param url
         * @param params post请求体，可为空
         * @return
         * @throws IOException
         */
        public static String post(JSONObject headers, String url, JSONObject params) throws IOException { 
            String response = "";
            HttpURLConnection httpURLConnection = (HttpURLConnection) (new URL(url).openConnection());
            httpURLConnection.setRequestMethod("POST");
            if (headers != null) { 
                Iterator<String> iterator = headers.keySet().iterator();
                while (iterator.hasNext()) { 
                    String headerName = iterator.next();
                    httpURLConnection.setRequestProperty(headerName, headers.get(headerName).toString());
                }
            }
            httpURLConnection.setDoOutput(true);
            httpURLConnection.connect();
            if(params!=null){ 
                httpURLConnection.getOutputStream().write(params.toJSONString().getBytes("UTF-8"));
            }
            if (httpURLConnection.getResponseCode() == 200) { 
                InputStream inputStream = httpURLConnection.getInputStream();
                byte[] buffer;
                buffer = new byte[1024];
                while ((length = inputStream.read(buffer)) != -1) { 
                    response = response + new String(buffer, 0, length, "UTF-8");
                }
                httpURLConnection.disconnect();
            }
            httpURLConnection.disconnect();
            return response;
        }
    }