不带参数的:
package xxx.xxx.xxx
import org.apache.http.HttpEntity;
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.util.EntityUtils;
import java.io.IOException;
public class HttpPostTest {
public static void main(String[] args) {
//1. 打开浏览器,创建HTTPClient对象
CloseableHttpClient httpClient = HttpClients.createDefault();
//2.输入网址,发起get请求创建HttpGet对象
HttpPost httpPost = new HttpPost("http://www.itcast.cn");
//3.按回车,发起请求,返回响应,使用HTTPClient对象发起请求
CloseableHttpResponse response = null;
try{
response = httpClient.execute(httpPost);
//4.解析响应,获取数据
if( response.getStatusLine().getStatusCode() == 200){
HttpEntity httpEntity = response.getEntity();
String content = EntityUtils.toString(httpEntity, "utf8");
System.out.println(content);
}
}catch(IOException e){
e.printStackTrace();
}finally {
//关闭response
try{
response.close();
}catch(IOException e){
e.printStackTrace();
}
try{
httpClient.close();
}catch(IOException e){
e.printStackTrace();
}
}
}
}
带参数的写法
package xxx.xxx.xxx;
import org.apache.http.HttpEntity;
import org.apache.http.NameValuePair;
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;
import java.io.IOException;
import java.io.UnsupportedEncodingException;
import java.util.ArrayList;
import java.util.List;
public class HttpPostParamTest {
public static void main(String[] args) throws Exception {
//1. 打开浏览器,创建HTTPClient对象
CloseableHttpClient httpClient = HttpClients.createDefault();
//2.输入网址,发起get请求创建HttpGet对象
HttpPost httpPost = new HttpPost("http://yun.itheima.com/search");
//声明List集合,封装表单中的参数
List<NameValuePair> params = new ArrayList<NameValuePair>();
params.add(new BasicNameValuePair("keys","Java"));
//创建表单的Entity对象.第一个参数是封装好的表单数据,第二个参数是编码
UrlEncodedFormEntity formEntity = new UrlEncodedFormEntity(params, "utf8");
//设置表单的Entity对象到Post请求中
httpPost.setEntity(formEntity);
CloseableHttpResponse response = null;
try{
response = httpClient.execute(httpPost);
//4.解析响应,获取数据
if( response.getStatusLine().getStatusCode() == 200){
HttpEntity httpEntity = response.getEntity();
String content = EntityUtils.toString(httpEntity, "utf8");
System.out.println(content);
}
}catch(IOException e){
e.printStackTrace();
}finally {
//关闭response
try{
response.close();
}catch(IOException e){
e.printStackTrace();
}
try{
httpClient.close();
}catch(IOException e){
e.printStackTrace();
}
}
}
}