哪位大神能告诉我怎么用 java 封装 get 和 post 请求

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哪位大神能告诉我怎么用java封装get和post请求

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  • zifeng

    😁 都是Happy大佬教出来的好学生

  • 其他回帖
  • huahua

    java是世界上最优美的语言吗?这么说,会不会被打

  • Carrie
    /**以get的方法处理接口请求调用
    	 * @param url
    	 * @param params
    	 * @return
    	 */
    	public static String doGet(String url,Map<String, String> params) {
    		List<BasicNameValuePair> parameters = new ArrayList<BasicNameValuePair>();
    //		取出所有参数
    		Set<String> keys = params.keySet();
    //		通过循环将参数保存到lst集合
    		for(String name:keys) {
    			String value = params.get(name);
    			parameters.add(new BasicNameValuePair(name, value));
    		}
    		String parameter = URLEncodedUtils.format(parameters, "UTF-8");
    		url+="?"+ parameter;
    		HttpGet httpGet = new HttpGet(url);
    		HttpClient httpClient = HttpClients.createDefault();
    		String result ="";
    		try {
    			HttpResponse httpResponse = httpClient.execute(httpGet);
    			result =EntityUtils.toString(httpResponse.getEntity());
    		} catch (Exception e) {
    			e.printStackTrace();
    		}
    		return result;
    		}
    
  • paopao

    这里举例说一下post请求的封装,get请求类似

        @Test
    	public void f1(){
    		try {
    			String url = "http://XXXXX:XXXX/futureloan/mvc/api/member/login";
    			HttpPost post = new HttpPost(url);
    			List<NameValuePair> parameters = new ArrayList<NameValuePair>();
    			parameters.add(new BasicNameValuePair("mobilephone", 13455555555));
    			parameters.add(new BasicNameValuePair("pwd", e10adc3949ba59abbe56e057f20f883e));
    			parameters.add(new BasicNameValuePair("type", 1));
    
    			// entity为原生form表单格式,可以从请求中Content-Type:
    			// application/x-www-form-urlencoded中获得
    			UrlEncodedFormEntity entity = new UrlEncodedFormEntity(parameters);
    			post.setEntity(entity);
    
    			// 创建一个客户端
    			CloseableHttpClient httpClient = HttpClients.createDefault();
                           //发送请求包
    			CloseableHttpResponse response = httpClient.execute(post);                        
                           //获得响应体
    			HttpEntity respEntity = response.getEntity();
    			String respResult = EntityUtils.toString(respEntity);
    			System.out.println(respResult);
    		} catch (Exception e) {
    			e.printStackTrace();
    		}
    
    	}
    

    封装的思路,抽取出不变的部分,提取出参数(需要变化的:比如url地址,请求参数)--此处补充说明:从上面可看出请求参数存放在List parameters 中,该依赖于httpClient,所以此处可换成HashMap,更具有通用性

    private static String post(String url, Map<String, String> paramsMap) {
    		String respResult = "";
    		try {
    			// 生成post请求
    			HttpPost post = new HttpPost(url);
    			if (paramsMap != null) {
    				// 设置post请求参数--请求体中间
    				// 创建一个容器,将保存在HashMap中的参数保存到这个容器中
    				List<NameValuePair> paramsList = new ArrayList<>();
    				Set<String> keySet = paramsMap.keySet();
    				for (String key : keySet) {
    					String value = paramsMap.get(key);
    					paramsList.add(new BasicNameValuePair(key, value));
    				}
    				// 创建一个原生form表单的请求体
    				UrlEncodedFormEntity entity = new UrlEncodedFormEntity(paramsList);
    				// 设置post请求体
    				post.setEntity(entity);
    			}
    			// 创建一个HTTP发送客户端
    			CloseableHttpClient httpClient = HttpClients.createDefault();
    			// 发数据包
    			CloseableHttpResponse response = httpClient.execute(post);
    			// 获取响应体中的内容
    			HttpEntity respEntity = response.getEntity();
    			respResult = EntityUtils.toString(respEntity);
    			return respResult;
    
    		} catch (Exception e) {
    			e.printStackTrace();
    		}
    		return respResult;
    	}
    

    调用方法

    @Test
    	public void post() {
    		// 1.请求地址
    		String url = "http://XXXXX:XXXX/lmcanon_web_auto/mvc/member/api/member/login";
    		// 3.设置post请求参数--请求体中间
    		// 创建一个容器,保存每个参数
    		HashMap<String,String> paramsMap=new HashMap<>();
    		paramsMap.put("mobilephone", 13555555555);
    		paramsMap.put("pwd", e10adc3949ba59abbe56e057f20f883e);
    		paramsMap.put("type", 1);
                    //返回响应体
    		String respResult=HttpUtils.post(url, paramsMap);
    		System.out.println(respResult);
    	}
    
    
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