java http请求的服务端和客户端

曾经终败给现在 2022-07-16 13:11 223阅读 0赞

java基于URLConnection进行http请求：

servlet服务端例子:

接收请求的方式1：

这种方式数据量大的话可能有问题，具体原因还为查清。

OutputStream opt = response.getOutputStream();
         String name = request.getParameter("name");
         String age = request.getParameter("age");
         System.out.println("========"+name+"=="+age);
         opt.write((name+"=="+age).getBytes("GBK")); //给调用方响应数据
         opt.flush();
         opt.close();
         ---------------------------------------------------------------------------------------
        接收请求的方式2： 流的方式        
        int leng = 0;
        byte[] buf = new byte[1024];
        ByteArrayOutputStream out1 = new ByteArrayOutputStream();
        OutputStream opt = response.getOutputStream();    
    
        InputStream in = request.getInputStream();
        while ((leng = in.read(buf))!=-1) {
    	out1.write(buf, 0, leng);
    	out1.flush();
        }
        in.close();
        System.out.println(new String(out1.toByteArray()));
    
        opt.write((name+"=="+age).getBytes("GBK")); //给调用方响应数据
    
    
     
     客户端：
     
    
    
               public class Demo {
    	public static void main(String[] args) {
    		URL url = null;
            HttpURLConnection conn = null;
            BufferedReader readInfo = null;
            StringBuffer returnXml =new StringBuffer();
            OutputStream out = null;
            try {
                url = new URL("http://10.100.16.236:8080/lftest/servlet/SendXml");
                conn = (HttpURLConnection) url.openConnection();
                conn.setConnectTimeout(1200);
                conn.setReadTimeout(1200);
                //conn.setRequestProperty("content-type", "text/plain");
                conn.setRequestMethod("POST");
                conn.setUseCaches(false); // 忽略缓存
                conn.setDoOutput(true); // 使用 URL 连接进行输入
                conn.setDoInput(true); // 使用 URL 连接进行输入
    		    StringBuffer sb = new StringBuffer();
    		    out = conn.getOutputStream();
    		    String age = "ffsdfdsfdsfdsf";
    		    out.write(("name=123&age="+age+"").getBytes("GBK"));
                out.flush();
                out.close();
                if (HttpURLConnection.HTTP_OK == conn.getResponseCode()) {// 正确返回
                    readInfo = new BufferedReader(new java.io.InputStreamReader(conn.getInputStream(),"GBK"));
                    String line = null;
                    while ((line = readInfo.readLine()) != null) {
                        returnXml.append(line);
                    }
                    System.out.println(conn.getResponseCode());
                    System.out.println(returnXml.toString());
                }
            }catch (Exception e) {
    			// TODO: handle exception
            	e.printStackTrace();
    		}finally{
    			conn.disconnect();
    		}
    	}
    }