java代码调用http接口简单例子(实测可用)

素颜马尾好姑娘i 2024-02-18 16:23 43阅读 0赞

package Mytest.model.test;
    
    import java.io.ByteArrayOutputStream;
    import java.io.InputStream;
    import java.io.OutputStream;
    import java.net.HttpURLConnection;
    import java.net.URL;
    import java.net.URLEncoder;
    
    public class HttpDemo {
        public static void main(String[] args) throws Exception {
            //请求的webservice的url
            URL url = new URL("http://www.longwenyun.com/lwSystem/user/getUserInfo.action");
            //创建http链接
            HttpURLConnection httpURLConnection = (HttpURLConnection) url.openConnection();
    
            //设置请求的方法类型
            httpURLConnection.setRequestMethod("POST");
    
            //设置请求的内容类型
            httpURLConnection.setRequestProperty("Content-type", "application/x-www-form-urlencoded");
    
            //设置发送数据
            httpURLConnection.setDoOutput(true);
            //设置接受数据
            httpURLConnection.setDoInput(true);
    
            //发送数据,使用输出流
            OutputStream outputStream = httpURLConnection.getOutputStream();
            //发送的soap协议的数据
            String content = "user_id="+ URLEncoder.encode("13846", "gbk");
    
            //发送数据
            outputStream.write(content.getBytes());
    
            //接收数据
            InputStream inputStream = httpURLConnection.getInputStream();
    
            //定义字节数组
            byte[] b = new byte[1024];
    
            //定义一个输出流存储接收到的数据
            ByteArrayOutputStream byteArrayOutputStream = new ByteArrayOutputStream();
    
            //开始接收数据
            int len = 0;
            while (true) {
                len = inputStream.read(b);
                if (len == -1) {
                    //数据读完
                    break;
                }
                byteArrayOutputStream.write(b, 0, len);
            }
            //从输出流中获取读取到数据(服务端返回的)
            String response = byteArrayOutputStream.toString();
    
            System.out.println(response);
        }
    }