两种调用实现"/>
Java版Http请求post和get两种调用实现
在实际项目中常涉及到相互调用,对于http接口的调用,需要经过建立连接,拼接参数,调用等步骤,记录下来,方便查看。
第一步、引入jar包
pom中引入apache的httpclient包
<dependency><groupId>commons-httpclient</groupId><artifactId>commons-httpclient</artifactId><version>3.1</version>
</dependency>
第二步、实现逻辑
http调用分为post和get两种方式,两者的流程一致,主要区别在于创建自己的对象。
(1)post调用方式
1)创建HttpClient实例对象
2)httpClient连接主机服务器
3)创建post请求方法实例对象
4)设置post请求超时时间
5)创建参数对象,并进行赋值操作;
6)执行post方法
7)获取返回结果,并释放连接
import java.io.IOException;
import org.apachemons.httpclient.HttpClient;
import org.apachemons.httpclient.HttpException;
import org.apachemons.httpclient.methods.PostMethod;
import org.apachemons.httpclient.params.HttpClientParams;
import org.apachemons.httpclient.params.HttpMethodParams;public class HttpClientUtil {public static String sendPost(String urlParam) throws HttpException, IOException {// 创建实例对象HttpClient httpClient = new HttpClient();// 设置httpClient连接主机服务器超时时间:15000毫秒httpClient.getHttpConnectionManager().getParams().setConnectionTimeout(15000);// 创建post请求方法实例对象PostMethod postMethod = new PostMethod(urlParam);// 设置post请求超时时间postMethod.getParams().setParameter(HttpMethodParams.SO_TIMEOUT, 60000);// 请求头postMethod.addRequestHeader("Content-Type", "application/json");// 创建参数对象HttpClientParams params = new HttpClientParams();params.setParameter("user_name", "Tom");params.setParameter("age", 20);httpClient.setParams(params);// 执行方法httpClient.executeMethod(postMethod);// 获取返回结果String result = postMethod.getResponseBodyAsString();// 释放连接postMethod.releaseConnection();return result;}
}
(2)get调用方式
1)创建HttpClient实例对象
2)httpClient连接主机服务器
3)创建get请求方法实例对象
4)设置post请求超时时间
5)创建参数对象,并进行赋值操作;
6)执行get方法
7)获取返回结果,并释放连接
import java.io.IOException;
import org.apachemons.httpclient.HttpClient;
import org.apachemons.httpclient.HttpException;
import org.apachemons.httpclient.methods.GetMethod;
import org.apachemons.httpclient.params.HttpClientParams;
import org.apachemons.httpclient.params.HttpMethodParams;
public static String sendGet(String urlParam) throws HttpException, IOException {// 创建httpClient实例对象HttpClient httpClient = new HttpClient();// 设置httpClient连接主机服务器超时时间:15000毫秒httpClient.getHttpConnectionManager().getParams().setConnectionTimeout(15000);// 创建GET请求方法实例对象GetMethod getMethod = new GetMethod(urlParam);// 设置post请求超时时间getMethod.getParams().setParameter(HttpMethodParams.SO_TIMEOUT, 60000);getMethod.addRequestHeader("Content-Type", "application/json");// 创建参数对象HttpClientParams params = new HttpClientParams();params.setParameter("user_name", "Tom");params.setParameter("age", 20);httpClient.setParams(params);// 执行方法httpClient.executeMethod(getMethod);// 获取返回结果String result = getMethod.getResponseBodyAsString();// 释放连接getMethod.releaseConnection();return result;
}
测试调用
public static void main(String[] args) throws HttpException, IOException {String post_url ="http://192.168.0.0:9090/test/post_load";// 调用post方法System.out.println(sendPost(post_url));String get_url ="http://192.168.0.0:9090/test/get_load";// 调用get方法System.out.println(sendGet(get_url));
}
以上就是http的两种调用方式的实现。
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Java版Http请求post和get两种调用实现
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