一、导入的坐标(pom.xml文件)
<dependency>
<groupId>org.apache.httpcomponents</groupId>
<artifactId>httpclient</artifactId>
<version>4.5.6</version>
</dependency>
二、HttpUtils(封装的HTTP工具类)
下面以json参数类型的post请求为例:
public static String jsonPost(String url,String params,boolean isToken) throws Exception{
//1、创建request(请求)
HttpPost post = new HttpPost(url);
//2、添加请求头
post.setHeader(Constants.HEADER_NAME, Constants.HEADER_VALUE);
//2.1判断是否需要鉴权
if(isToken){
VariableUtils.getToken(post);
}
//3、添加入参
post.setEntity(new StringEntity(params, "UTF-8"));
//4、发送接口
CloseableHttpClient client = HttpClients.createDefault();
//5、接收响应结果
CloseableHttpResponse response = client.execute(post);
//6、格式化响应结果
HttpEntity entity = response.getEntity();
String body = EntityUtils.toString(entity);
return body;
}
调用的获取鉴权函数(getToken())
public static void getToken(HttpRequest post){
//1、从map中获取鉴权值
String token = env.get("access_token");
//2、判断值不为空,则传入到头参数中
if(token != null){
post.setHeader("access_token",token);
}
}
