java 发送json数据

刺骨的言语ヽ痛彻心扉 2022-05-17 07:22 193阅读 0赞

package com.core.utils;
    
    import net.sf.json.JSONObject;
    
    import java.io.BufferedReader;
    import java.io.DataOutputStream;
    import java.io.InputStream;
    import java.io.InputStreamReader;
    import java.io.OutputStream;
    import java.net.HttpURLConnection;
    import java.net.URL;
    
    public class HttpUtil {
    
        public static String getJsonData(JSONObject jsonParam, String urls) {
            StringBuffer sb=new StringBuffer();
            try {
                // 创建url资源
                URL url = new URL(urls);
                // 建立http连接
                HttpURLConnection conn = (HttpURLConnection) url.openConnection();
                // 设置允许输出
                conn.setDoOutput(true);
                // 设置允许输入
                conn.setDoInput(true);
                // 设置不用缓存
                conn.setUseCaches(false);
                // 设置传递方式
                conn.setRequestMethod("POST");
                // 设置维持长连接
                conn.setRequestProperty("Connection", "Keep-Alive");
                // 设置文件字符集:
                conn.setRequestProperty("Charset", "UTF-8");
                // 转换为字节数组
                byte[] data = (jsonParam.toString()).getBytes();
                // 设置文件长度
                conn.setRequestProperty("Content-Length", String.valueOf(data.length));
                // 设置文件类型:
                conn.setRequestProperty("contentType", "application/json");
                // 开始连接请求
                conn.connect();
                OutputStream out = new DataOutputStream(conn.getOutputStream()) ;
                // 写入请求的字符串
                out.write((jsonParam.toString()).getBytes("UTF-8"));
                out.flush();
                out.close();
    
                System.out.println(conn.getResponseCode());
    
                // 请求返回的状态
                if (HttpURLConnection.HTTP_OK == conn.getResponseCode()){
                    System.out.println("连接成功");
                    // 请求返回的数据
                    InputStream in1 = conn.getInputStream();
                    try {
                        String readLine=new String();
                        BufferedReader responseReader=new BufferedReader(new InputStreamReader(in1,"UTF-8"));
                        while((readLine=responseReader.readLine())!=null){
                            sb.append(readLine).append("\n");
                        }
                        responseReader.close();
                        System.out.println(sb.toString());
    
                    } catch (Exception e1) {
                        e1.printStackTrace();
                    }
                } else {
                    System.out.println("error++");
    
                }
    
            } catch (Exception e) {
    
            }
    
            return sb.toString();
    
        }
    }

## 如果您除了发送json数据，还希望带上其它参数，那么在传入的url中拼接上即可。 ##