Scala 通过HttpClients发送get和post请求
Scala 通过HttpClients发送get和post请求
由于之前的工程代码都是使用Scala开发的，而最近工作中涉及到一个新功能需要发送post请求后端接口，今把如何使用HttpClients做个笔记。
get请求
def getResponse(url: String, header: String = null): String = {
val httpClient = HttpClients.createDefault() // 创建 client 实例
val get = new HttpGet(url) // 创建 get 实例
if (header != null) { // 设置 header
val json = JSON.parseObject(header)
json.keySet().toArray.map(_.toString).foreach(key => get.setHeader(key, json.getString(key)))
}
val response = httpClient.execute(get) // 发送请求
EntityUtils.toString(response.getEntity) // 获取返回结果
}
上述代码还是比较简单的，创建client并获取get实例，然后设置header信息，最后直接执行发送请求即可获取结果
post请求
def postResponse(url: String, params: String = null, header: String = null): String ={
val httpClient = HttpClients.createDefault() // 创建 client 实例
val post = new HttpPost(url) // 创建 post 实例
// 设置 header
if (header != null) {
val json = JSON.parseObject(header)
json.keySet().toArray.map(_.toString).foreach(key => post.setHeader(key, json.getString(key)))
}
if (params != null) {
post.setEntity(new StringEntity(params, "UTF-8"))
}
val response = httpClient.execute(post) // 创建 client 实例
EntityUtils.toString(response.getEntity, "UTF-8") // 获取返回结果
}
和get方式一样，唯一不同的地方就是多了设置post参数
完整代码如下
需要在pom文件中添加如下依赖
com.alibaba
fastjson
1.2.32
org.apache.httpcomponents
httpcore
4.4.9
org.apache.httpcomponents
httpclient
4.5.5
com.jmzhou.http
import com.alibaba.fastjson.JSON
import org.apache.http.client.methods.{HttpGet, HttpPost}
import org.apache.http.entity.StringEntity
import org.apache.http.impl.client.HttpClients
import org.apache.http.util.EntityUtils
/**
* Created by zhoujiamu on 2019/1/9.
*/
object MyHttpResponse {
def getResponse(url: String, header: String = null): String = {
val httpClient = HttpClients.createDefault() // 创建 client 实例
val get = new HttpGet(url) // 创建 get 实例
if (header != null) { // 设置 header
val json = JSON.parseObject(header)
json.keySet().toArray.map(_.toString).foreach(key => get.setHeader(key, json.getString(key)))
}
val response = httpClient.execute(get) // 发送请求
EntityUtils.toString(response.getEntity) // 获取返回结果
}
def postResponse(url: String, params: String = null, header: String = null): String ={
val httpClient = HttpClients.createDefault() // 创建 client 实例
val post = new HttpPost(url) // 创建 post 实例
// 设置 header
if (header != null) {
val json = JSON.parseObject(header)
json.keySet().toArray.map(_.toString).foreach(key => post.setHeader(key, json.getString(key)))
}
if (params != null) {
post.setEntity(new StringEntity(params, "UTF-8"))
}
val response = httpClient.execute(post) // 创建 client 实例
EntityUtils.toString(response.getEntity, "UTF-8") // 获取返回结果
}
def main(args: Array[String]): Unit = {
val url = "http://192.168.1.00:8082/risk/getUserByGet?userName=zhoujiamu"
println("This get response: ")
println(getResponse(url))
val postUrl = "http://192.168.1.00:8082/risk/group"
val params = """{"company_list":["北京佛尔斯特金融信息服务有限公司"],"conditions":{}}"""
println("This post response: ")
println(postResponse(postUrl, params, """{"Content-Type": "application/json"}"""))
}
}
运行结果如下：
This get response:
Hello zhoujiamu
This post response:
{ "group_name":"P2P风险传导场景", "vertices":[{"_id":"Virtual/D41D8CD98F00B204E9800998ECF8427E","name":"泛化条件点","pr":"0.0","is_source":"false","main_path_list":[]},{"name":"钱满仓","_id":"Platform/36FFFD6CDAE2C688EC0879E05D3305B8","pr":"0.0","is_source":"false","main_path_list":[]}],"edges":[{"similarity":1.0,"_to":"Virtual/D41D8CD98F00B204E9800998ECF8427E","_from":"Platform/36FFFD6CDAE2C688EC0879E05D3305B8","label":"问题P2P平台","_id":"generalized/36FFFD6CDAE2C688EC0879E05D3305B8","is_main_path":"false"},{"_to":"Platform/36FFFD6CDAE2C688EC0879E05D3305B8","_from":"Company/A245F7AA7A271C4CD6D7C374A19F52E7","label":"经营","_id":"manage/42F73DE7FC64E70792977F681EAA23AE","is_main_path":"false"}] }