使用HttpURLConnection向服务器发送post和get请求

最新推荐文章于 2020-06-13 12:49:36 发布

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最新推荐文章于 2020-06-13 12:49:36 发布

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本文详细介绍了如何使用HttpURLConnection类向服务器发送GET和POST请求的方法，包括发送请求、读取服务器响应数据的过程，并展示了参数的URL编码和设置请求头的方式。

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使用HttpURLConnection向服务器发送post和get请求

转自：http://www.cnblogs.com/linjiqin/archive/2011/09/19/2181634.html

一、使用HttpURLConnection向服务器发送get请求

1、向服务器发送get请求

    @Test
    publicvoid sendSms() throws Exception{
        String message="货已发到";
        message=URLEncoder.encode(message, "UTF-8");
        System.out.println(message);
        String path ="http://localhost:8083/DS_Trade/mobile/sim!add.do?message="+message;
        URL url =new URL(path);
        HttpURLConnection conn = (HttpURLConnection)url.openConnection();
        conn.setConnectTimeout(5*1000);
        conn.setRequestMethod("GET");
        InputStream inStream = conn.getInputStream();    
        byte[] data = StreamTool.readInputStream(inStream);
        String result=new String(data, "UTF-8");
        System.out.println(result);
    }

2、从服务器读取数据

String message=request.getParameter("message");

二、使用HttpURLConnection向服务器发送post请求

1、向服务器发送post请求

    @Test
    publicvoid addByUrl() throws Exception{
        String encoding="UTF-8";
        String params="[{\"addTime\":\"2011-09-19 14:23:02\"[],\"iccid\":\"1111\",\"id\":0,\"imei\":\"2222\",\"imsi\":\"3333\",\"phoneType\":\"4444\",\"remark\":\"aaaa\",\"tel\":\"5555\"}]";
        String path ="http://localhost:8083/xxxx/xxx/sim!add.do";
        byte[] data = params.getBytes(encoding);
        URL url =new URL(path);
        HttpURLConnection conn = (HttpURLConnection)url.openConnection();
        conn.setRequestMethod("POST");
        conn.setDoOutput(true);
        //application/x-javascript text/xml->xml数据 application/x-javascript->json对象 application/x-www-form-urlencoded->表单数据
        conn.setRequestProperty("Content-Type", "application/x-javascript; charset="+ encoding);
        conn.setRequestProperty("Content-Length", String.valueOf(data.length));
        conn.setConnectTimeout(5*1000);
        OutputStream outStream = conn.getOutputStream();
        outStream.write(data);
        outStream.flush();
        outStream.close();
        System.out.println(conn.getResponseCode()); //响应代码 200表示成功
        if(conn.getResponseCode()==200){
            InputStream inStream = conn.getInputStream();   
            String result=new String(StreamTool.readInputStream(inStream), "UTF-8");
        }
    }

2、从服务器读取数据

//获取post请求过来的数据
byte[] data=StreamTool.readInputStream(request.getInputStream());
        //[{\"addTime\":\"2011-09-19 14:23:02\"[],\"iccid\":\"1111\",\"id\":0,\"imei\":\"2222\",\"imsi\":\"3333\",\"phoneType\":\"4444\",\"remark\":\"aaaa\",\"tel\":\"5555\"}]
        String json=new String(data, "UTF-8");