Http发送post请求

如何用java实现PostMan请求：

 

 

 

 

java实现：

 

import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.io.PrintWriter;
import java.net.HttpURLConnection;
import java.net.URL;
import java.nio.charset.Charset;
import java.nio.charset.StandardCharsets;


/**
 * @param  ediKey  固定值 后面可变
 * @param   ediVal  固定值 后面可变
 * @author jizm_wb
 *
 */
public class TestPostHttp {

    public static void main(String[] args) {  
        String url= "http://localhost:8080/ediserver/gateway.do";
        
        String param ="{\r\n"
                + "    \"datas\": [\r\n"
                + "        {\r\n"
                + "            \"ediKey\": \"businessid\",\r\n"
                + "            \"ediVal\": \"R2022000030\"\r\n"
                + "        }\r\n"
                + "    ],\r\n"
                + "    \"imethod\": \"getEdiMessages\"\r\n"
                + "}";
        
        
        String insureResponsePost = insureResponsePost(url,param);
        
        System.out.println(insureResponsePost);
    }
        
        /**
         * 接口调用(post请求) 数据处理
         *
         * @param url
         *            请求路径 例如：http://127.0.0.1:8080/test/test
         * @param param
         *            请求参数 例如：{ "userName":"Lily", "password":"123456" }
         * @return 响应数据 例如：{ "resultId":"1" "resultMsg":"操作成功" }
         */
        public static String insureResponsePost(String url, String param) {
            PrintWriter out = null;
            InputStream is = null;
            BufferedReader br = null;
            String result = "";
            HttpURLConnection conn = null;
            StringBuilder stringBuilder = new StringBuilder();
            try {
                URL realUrl = new URL(url);
                conn = (HttpURLConnection) realUrl.openConnection();
                // 设置通用的请求属性
                conn.setRequestMethod( "POST");
                conn.setConnectTimeout(20000);
                conn.setReadTimeout(300000);
                conn.setRequestProperty("Charset", "utf-8");
             // 传输数据为json，如果为其他格式可以进行修改
                conn.setRequestProperty( "Content-Type", "application/json");
                conn.setRequestProperty( "Content-Encoding", "utf-8");
                // 发送POST请求必须设置如下两行
                conn.setDoOutput( true);
                conn.setDoInput( true);
                conn.setUseCaches( false);
                // 获取URLConnection对象对应的输出流
                out = new PrintWriter(conn.getOutputStream());
                // 发送请求参数
                out.print(param);
                // flush输出流的缓冲
                out.flush();
                is = conn.getInputStream();
                BufferedReader bufferedReader = null;
                if (is != null) {
                    // 此处需要将编码格式设置为UTF_8，解决 InputStream 流读取时的中文乱码问题
                    bufferedReader = new BufferedReader(new InputStreamReader(is, StandardCharsets.UTF_8));
                    char[] charBuffer = new char[128];
                    int bytesRead = -1;
                    while ((bytesRead = bufferedReader.read(charBuffer)) > 0) {
                        stringBuilder.append(charBuffer, 0, bytesRead);
                    }
                } else {
                    stringBuilder.append("");
                }
               
                result = stringBuilder.toString();
            } catch (Exception e) {
                System. out.println( "发送 POST 请求出现异常！" + e);
                e.printStackTrace();
            }
            // 使用finally块来关闭输出流、输入流
            finally {
                try {
                    if (out != null) {
                        out.close();
                    }
                    if (br != null) {
                        br.close();
                    }
                    if (conn!= null) {
                        conn.disconnect();
                    }
                } catch (IOException ex) {
                    ex.printStackTrace();
                }
            }
            return result;
        }
        

}