FastJson - 从HttpEntity到Json

在使用java + httpClient施行API自动化时,不可避免地遇到了如下问题:

1. 用Http Response数据做断言;

2. 用上一个请求的Response内容,作为下一个请求的参数;

如果用jmeter来做的话,首选当然是BeanShell。然而,当需要自己写的时候(通过java + httpClient),在此我用到了FastJson。

1. 以一个Post请求为例,代码如下:

 1     public CloseableHttpResponse post(String url , String entityString , HashMap<String , String> headermap) 
 2             throws ClientProtocolException, IOException {
 3         //创建一个可关闭的 httpClient对象
 4         CloseableHttpClient httpClient = HttpClients.createDefault();
 5         //创建一个HttpPost的请求对象
 6         HttpPost httpPost = new HttpPost(url);
 7         //设置payload
 8         httpPost.setEntity(new StringEntity(entityString));
 9         //加载请求头到HttpPost对象
10         for (Map.Entry<String , String> entry : headermap.entrySet()) {
11             httpPost.addHeader(entry.getKey(), entry.getValue());
12         }
13         //发送post请求
14         CloseableHttpResponse httpResponse = httpClient.execute(httpPost);
15         return httpResponse;
16     }

2. 发送Post请求后,我们会得到一个CloseableHttpResponse。接下来,我们提取状态码(status):

1 int statusCode = closeableHttpResponse.getStatusLine().getStatusCode();

  3. 提取返回实体(httpEntity):

1 HttpEntity entity = closeableHttpResponse.getEntity();
2 System.out.println(entity);

此时的输出结果为:

4. HttpEntity 转化为 String:

1 String responseEntity = EntityUtils.toString(entity);
2 System.out.println(responseEntity);

此时的输出结果为String格式,提取code、message等值,只能通过字符串截取:

5. String 转化为 JsonObject:

1 JSONObject jsonObject = JSON.parseObject(responseEntity);
2 System.out.println(jsonObject);

此时的输出结果为JsonObject格式:

6. 提取code、message的值:

1 String responseCode = jsonObject.getString("code");
2 String responseMessage = jsonObject.getString("message");

7. 提取orderId:

1 //由于info的值是json格式(或可理解为key-value集合),提取info的值为JSONObject格式
2 JSONObject infoObject = jsonObject.getJSONObject("info");
3 //重复步骤6,提取orderId
4 String orderId= jsonObject.getString("orderId");
5 //或通过将infoObject转化为HashMap,再进行提取orderId
6 HashMap<String, Object> info = new HashMap<String, Object>();
7 info = JSON.parseObject(String.valueOf(infoObject), new TypeReference<HashMap<String, Object>>() {});
8 String orderId = info.get("orderId").toString();

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转载自www.cnblogs.com/TaylorYoung/p/10422878.html
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