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httpPost请求用java实现的方法
package com.day3.sample;
//首先下面我我们需要导入的jar包和文件
import java.io.IOException; import java.util.ArrayList; import java.util.List;
import org.apache.http.Consts;
import org.apache.http.NameValuePair;
import org.apache.http.client.ClientProtocolException;
import org.apache.http.client.entity.UrlEncodedFormEntity;
import org.apache.http.client.methods.CloseableHttpResponse;
import org.apache.http.client.methods.HttpPost;
import org.apache.http.impl.client.CloseableHttpClient;
import org.apache.http.impl.client.HttpClients;
import org.apache.http.message.BasicNameValuePair;
import org.apache.http.util.EntityUtils;
public class HttpClientDemo2 {
//构造POST请求
public void test_post(){
//新建一个客户对象
CloseableHttpClient client = HttpClients.createDefault();
//新建一个HttpPost请求的对象 --并将uri传给这个对象
HttpPost post = new HttpPost("http://localhost:8080/test1312/Calc");
//使用NameValuePair 键值对 对参数进行打包
List<NameValuePair> list = new ArrayList<NameValuePair>
list.add(new BasicNameValuePair("a","1"));
list.add(new BasicNameValuePair("b","2"));
//4.对打包好的参数,使用UrlEncodedFormEntity工具类生成实体的类型数据
UrlEncodedFormEntity entity = new UrlEncodedFormEntity(list,Consts.UTF_8);
//5.将含有请求参数的实体对象放到post请求中
post.setEntity(entity);
//6.新建一个响应对象来接收客户端执行post的结果
CloseableHttpResponse response = client.execute(post);
//7.从响应对象中提取需要的结果-->实际结果,与预期结果进行对比
if(response.getStatusLine().getStatusCode() == 200){
System.out.println(EntityUtils.toString(response.getEntity()));
}
}
}
//编写过程中如果有异常请选择shrow这个异常
httpPost请求用java实现的方法