java 让程序经过代理上网

约定不等于承诺〃 2022-05-22 08:28 112阅读 0赞

什么都不说了.附上代码

public class HttpUtil {
    	static private RequestConfig requestConfig = null;
    	static private CredentialsProvider credentialsProvider = null;
    	static private boolean isProxyUser = false;
    	
    	static public void setRequestConfig(String addr, String port, String scheme, String user, String password) {
    		if (addr.isEmpty() || port.isEmpty()) return;
    		
    		int nPort = Integer.parseInt(port);
    		HttpHost proxy = new HttpHost(addr, nPort, scheme);
    		requestConfig = RequestConfig.custom().setProxy(proxy).build();
    		
    		if (password.isEmpty()) return;
    		
    		isProxyUser = true;
    		//设置代理IP端口和验证密码
    		credentialsProvider = new BasicCredentialsProvider();
    		credentialsProvider.setCredentials(new AuthScope(proxy.getHostName(), proxy.getPort()), 
    										   new UsernamePasswordCredentials(user, password));
    	}
    	
    	static public String doGet(String url, List<NameValuePair> param) {
    		CloseableHttpClient client = null;
    		try {  
    			String str = EntityUtils.toString(new UrlEncodedFormEntity(param, Consts.UTF_8));
    			if (isProxyUser) {
    				client = HttpClients.custom().setDefaultCredentialsProvider(credentialsProvider).build();
    			} else {
    				client = HttpClientBuilder.create().build();
    			} 
    			
                //发送GET 请求
                HttpGet request = new HttpGet(url+"?"+str);  
                //设置代理服务器
                request.setConfig(requestConfig);
                
                HttpResponse response = client.execute(request);  
          
                /**请求发送成功，并得到响应**/  
                if (response.getStatusLine().getStatusCode() == HttpStatus.SC_OK) {  
                    /**读取服务器返回过来的json字符串数据**/  
                    String strResult = EntityUtils.toString(response.getEntity());  
                      
                    return strResult;  
                }
                Shell shell = new Shell();
            	shell.setLocation(Display.getCurrent().getClientArea().width/2 - shell.getShell().getSize().x/2,
        				Display.getCurrent().getClientArea().height/2 - shell.getSize().y/2);
            	MessageDialog.openWarning(shell, "提示", response.getStatusLine().getReasonPhrase());
            }   
            catch (Exception e) {
            	Shell shell = new Shell();
            	shell.setLocation(Display.getCurrent().getClientArea().width/2 - shell.getShell().getSize().x/2,
        				Display.getCurrent().getClientArea().height/2 - shell.getSize().y/2);
            	MessageDialog.openWarning(shell, "提示", e.getMessage());
                e.printStackTrace();  
            }
    		
    		return null;
    	}
    	
    	static public String doPost(String url, List<NameValuePair> param) {
    		CloseableHttpClient client = null;
    		try {
    			if (isProxyUser) {
    				client = HttpClients.custom().setDefaultCredentialsProvider(credentialsProvider).build();
    			} else {
    				client = HttpClientBuilder.create().build();
    			} 
    			//发送POST 请求
    			HttpPost request = new HttpPost(url);
    			//设置代理服务器
    			request.setConfig(requestConfig);
    			request.setEntity(new UrlEncodedFormEntity(param, "UTF-8"));
    			HttpResponse response = client.execute(request);
    			
    			/**请求发送成功，并得到响应**/  
                if (response.getStatusLine().getStatusCode() == HttpStatus.SC_OK) {  
                    /**读取服务器返回过来的json字符串数据**/  
                    String strResult = EntityUtils.toString(response.getEntity());  
                      
                    return strResult;  
                }
                Shell shell = new Shell();
            	shell.setLocation(Display.getCurrent().getClientArea().width/2 - shell.getShell().getSize().x/2,
        				Display.getCurrent().getClientArea().height/2 - shell.getSize().y/2);
            	MessageDialog.openWarning(shell, "提示", response.getStatusLine().getReasonPhrase());
    		} catch (Exception e) {
    			// TODO: handle exception
    			Shell shell = new Shell();
            	shell.setLocation(Display.getCurrent().getClientArea().width/2 - shell.getShell().getSize().x/2,
        				Display.getCurrent().getClientArea().height/2 - shell.getSize().y/2);
            	MessageDialog.openWarning(shell, "提示", e.getMessage());
    		}
    		return null;
    	}
    }