简介
- HttpClient
遵循http协议的客户端编程工具包- 支持
最新的http协议
部分依赖自动传递依赖了HttpClient的jar包
- 明明项目中没有引入 HttpClient 的Maven坐标，但是却可以直接使用HttpClient
- 原因是：阿里云的sdk依赖中传递依赖了HttpClient的jar包
发送get请求
@Test
public void testGet() {
// 创建HttpGet对象
HttpGet httpGet = new HttpGet("http://localhost:8080/user/shop/status");
// 创建HttpClient对象 用于发送请求
// try-with-resources 语法 需要关闭的资源分别是 httpClient response
try (CloseableHttpClient httpClient = HttpClients.createDefault();
CloseableHttpResponse response = httpClient.execute(httpGet)) {
// 获取响应状态码
int statusCode = response.getStatusLine().getStatusCode();
System.out.println("响应状态码：" + statusCode); //响应状态码：200
// 获取响应数据
HttpEntity entity = response.getEntity();
String result = EntityUtils.toString(entity);
System.out.println("响应数据：" + result); // 响应数据：{"code":1,"msg":null,"data":1}
} catch (IOException e) {
log.error("请求失败", e);
e.printStackTrace();
}
}
发送post请求
/**
* 测试HttpClient 发送post请求 需要提前启动项目 不然请求不到
*/
@Test
public void testPost() {
// 创建HttpPost对象
HttpPost httpPost = new HttpPost("http://localhost:8080/admin/employee/login");
// 这个请求是有请求体的
// 使用JsonObject构建请求体 更加高效简洁
JsonObject jsonObject = new JsonObject();
jsonObject.addProperty("username", "admin");
jsonObject.addProperty("password", "123456");
// 将json对象转为字符串 并设置编码格式 设置传输的数据格式 使用构造器和set方法都是可以设置的
StringEntity stringEntity = null;
try {
stringEntity = new StringEntity(jsonObject.toString());
stringEntity.setContentEncoding("UTF-8");
stringEntity.setContentType("application/json");
} catch (UnsupportedEncodingException e) {
throw new RuntimeException(e);
}
// 设置请求体
httpPost.setEntity(stringEntity);
// 创建HttpClient对象 用于发送请求
// try-with-resources 语法 需要关闭的资源分别是 httpClient response
try (CloseableHttpClient httpClient = HttpClients.createDefault();
CloseableHttpResponse response = httpClient.execute(httpPost)) {
// 获取响应状态码
int statusCode = response.getStatusLine().getStatusCode();
System.out.println("响应状态码：" + statusCode); //响应状态码：200
// 获取响应数据
HttpEntity entity = response.getEntity();
String result = EntityUtils.toString(entity);
System.out.println("响应数据：" + result); // 响应数据：{"code":1,"msg":null,"data":{"id":1,"userName":"admin","name":"管理员","token":"eyJhbGciOiJIUzI1NiJ9.eyJlbXBJZCI6MSwiZXhwIjoxNzI4MzgwOTk5fQ.Rm7UWZbDEU_06DJLfegcP31n-9g8AB-Jxa-49Zw-ttM"}}
} catch (IOException e<