JAVA post和get方式请求远程HTTP接口

java发送http协议 一般对方都会限定post或者get 这里就是可用的方法

首先是POST方式

传入参数为json 可改为任何类型

public class HttpPost implements Runnable {
    
    private String url_str;
    
    public HttpPost () {
        
    }
    
    public HttpPost (String url, boolean isPost) {
        this.url_str = url;
    }
    
    @Override
    public void run() {
        JSONObject param_json = new JSONObject();
        
        URL url = null;
        PrintWriter send_out = null;
        BufferedReader send_in = null;
        String result = "";
        try {
            //----------------------------------------------------------//
            //http://blog.csdn.net/thl331860203/article/details/51783434//
            //JAVA POST请求远程HTTP接口                                   //
            //----------------------------------------------------------//
            url = new URL(this.url_str);
            //打开和URL之间的连接 
            URLConnection connection = url.openConnection();
            //设置通用的请求属性  
            connection.setRequestProperty("accept", "*/*");  
            connection.setRequestProperty("connection", "Keep-Alive");  
            connection.setRequestProperty("Content-Type", "application/x-www-form-urlencoded"); 
            connection.setRequestProperty("user-agent","Mozilla/4.0 (compatible; MSIE 6.0; Windows NT 5.1;SV1)");
            end_out = new PrintWriter(connection.getOutputStream());
　　　　　　　//发送请求参数 
            send_out.print(param_json);
            //flush输出流的缓冲 
            send_out.flush();//定义BufferedReader输入流来读取URL的响应
            send_in = new BufferedReader(new InputStreamReader(connection.getInputStream()));
            String line;
            while((line = send_in.readLine()) != null){
                result += line;
            }
            getResultData(result);
        } catch (MalformedURLException e) {
            e.printStackTrace();
        } catch (IOException e) {
            e.printStackTrace();
        }
    }
    
    public void getResultData(String result) {
    }
}            

接下来是Get方式

public class HttpGet implements Runnable {
    
    private String url_str;public HttpGet() {
        
    }
    
    public HttpGet(String url, boolean isPost) {
        this.url_str = url;
    }
    
    @Override
    public void run() {
        JSONObject param_json = new JSONObject();
        
        URL url = null;
        PrintWriter send_out = null;
        BufferedReader send_in = null;
        String result = "";
        try {
            //----------------------------------------------------------//
            //http://blog.csdn.net/thl331860203/article/details/51783434//
            //JAVA POST请求远程HTTP接口                                   //
            //----------------------------------------------------------//
            url = new URL(this.url_str);
            //打开和URL之间的连接 
            URLConnection connection = url.openConnection();
            //设置通用的请求属性  
            connection.setRequestProperty("accept", "*/*");  
            connection.setRequestProperty("connection", "Keep-Alive");  
            connection.setRequestProperty("Content-Type", "application/x-www-form-urlencoded"); 
            connection.setRequestProperty("user-agent","Mozilla/4.0 (compatible; MSIE 6.0; Windows NT 5.1;SV1)");//建立连接
            connection.connect();
            //定义BufferedReader输入流来读取URL的响应
            send_in = new BufferedReader(new InputStreamReader(connection.getInputStream()));
            String line;
            while((line = send_in.readLine()) != null){
                result += line;
            }
            getResultData(result);
        } catch (MalformedURLException e) {
            e.printStackTrace();
        } catch (IOException e) {
            e.printStackTrace();
        }
    }
    
    public void getResultData(String result) {

    }
}

关于实现

HttpGet test = new HttpGet("");
Thread thread = new Thread(test);
thread.start();

因为JAVA在某版本之后 为了防止协议没有响应 所以不允许直接使用这个方法 一定要在子线程中使用

以上除了代码以外都是自己的理解 如果不对 请指出 谢谢