java接口测试入门

一、什么是接口

接口是前端和后端的数据通道

二、如何获取接口

1.开发不提供接口文档，通过抓包工具比如fiddler进行抓取，如下：

步骤一：设置浏览器（比如火狐）代理

 

步骤二：设置url过滤器，进入包的过滤抓取

 步骤三：查看fiddler抓取的包，获取到接口

2.开发提供详细接口文档

三、通过Java代码模拟客户端向服务器发送请求，查看接口响应

步骤一：下载开源对象HttpClient所属的Jar包至本地，下载地址：http://hc.apache.org/downloads.cgi

步骤二：将解压后lib目录下的jar文件拷贝至java工程并build path

步骤三：创建Java类，编写代码模拟客户端发送请求，查看响应

a）get请求

    private static void get() throws IOException, ClientProtocolException {
        String url = "http://xxx.com//loginValidate.do";
        url += "?userName=xxx&password=xxx";
        //客户端
        HttpClient client = HttpClients.createDefault();
        //建立get请求
        HttpGet get = new HttpGet(url);
        //发送请求,得到响应
        HttpResponse response = client.execute(get);
        //返回响应体
        HttpEntity entity = response.getEntity();
        //将响应体以字符串形式返回
        String content = EntityUtils.toString(entity);
        System.out.println((content));
    }

b) post请求

private static void post() throws UnsupportedEncodingException, IOException, ClientProtocolException {
        String url = "http://xxxx.com//loginValidate.do";
        //客户端
        HttpClient client = HttpClients.createDefault();
        //建立post请求
        HttpPost post = new HttpPost(url);
        //封装参数信息,使用list保存
        List<NameValuePair> pairs = new ArrayList();
        NameValuePair pair1 = new BasicNameValuePair("userName", "xxxx");
        NameValuePair pair2 = new BasicNameValuePair("password","xxxx");
        pairs.add(pair1);
        pairs.add(pair2);
        post.setEntity(new UrlEncodedFormEntity(pairs));
        
        //发送请求,得到响应
        HttpResponse response = client.execute(post);
        //返回响应体
        HttpEntity entity = response.getEntity();
        //将响应体以字符串形式返回
        String content = EntityUtils.toString(entity);
        System.out.println((content));
    }