HTTPClient Get和Post提交

最新推荐文章于 2024-07-23 15:25:35 发布

漆黑的夜II

最新推荐文章于 2024-07-23 15:25:35 发布

阅读量213

点赞数

CC 4.0 BY-SA版权

分类专栏： http

本文链接：https://blog.youkuaiyun.com/wyb_Night/article/details/80524179

http 专栏收录该内容

3 篇文章

订阅专栏

本文提供了使用Java实现HTTP GET和POST请求的具体示例代码，包括无参数和带参数的情况，并展示了如何设置请求头、构造请求实体及处理响应。

摘要生成于 C知道，由 DeepSeek-R1 满血版支持，前往体验 >

Post提交不带参数

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;

public class DoPOST {

	public static void main(String[] args) throws Exception {

		// 创建Httpclient对象
		CloseableHttpClient httpclient = HttpClients.createDefault();

		// 创建http POST请求
		HttpPost httpPost = new HttpPost("http://www.oschina.net/");

		// 设置请求头，伪装是人访问
		httpPost.setHeader("User-Agent", "");

		CloseableHttpResponse response = null;
		try {
			// 执行请求
			response = httpclient.execute(httpPost);
			// 判断返回状态是否为200
			if (response.getStatusLine().getStatusCode() == 200) {
				String content = EntityUtils.toString(response.getEntity(), "UTF-8");
				System.out.println(content);
			}
		} finally {
			if (response != null) {
				response.close();
			}
			httpclient.close();
		}
	}
}

Post提交带参数

import java.util.ArrayList;
import java.util.List;

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;

public class DoPOSTParam {

	public static void main(String[] args) throws Exception {

		// 创建Httpclient对象
		CloseableHttpClient httpclient = HttpClients.createDefault();

		// 创建http POST请求
		HttpPost httpPost = new HttpPost("http://www.oschina.net/search");

		// 设置请求头，伪装是人访问
		httpPost.setHeader("User-Agent", "");

		// 设置2个post参数，一个是scope、一个是q
		List<NameValuePair> parameters = new ArrayList<NameValuePair>(0);
		parameters.add(new BasicNameValuePair("scope", "project"));
		parameters.add(new BasicNameValuePair("q", "java"));
		// 构造一个form表单式的实体
		UrlEncodedFormEntity formEntity = new UrlEncodedFormEntity(parameters, "UTF-8");
		// 将请求实体设置到httpPost对象中
		httpPost.setEntity(formEntity);

		CloseableHttpResponse response = null;
		try {
			// 执行请求
			response = httpclient.execute(httpPost);
			// 判断返回状态是否为200
			if (response.getStatusLine().getStatusCode() == 200) {
				String content = EntityUtils.toString(response.getEntity(), "UTF-8");
				System.out.println(content);
			}
		} finally {
			if (response != null) {
				response.close();
			}
			httpclient.close();
		}
	}
}

Get提交不带参数

import org.apache.http.client.methods.CloseableHttpResponse;
import org.apache.http.client.methods.HttpGet;
import org.apache.http.impl.client.CloseableHttpClient;
import org.apache.http.impl.client.HttpClients;
import org.apache.http.util.EntityUtils;

public class DoGET {
    public static void main(String[] args) throws Exception {
        // 创建Httpclient对象
        CloseableHttpClient httpclient = HttpClients.createDefault();

        // 创建http GET请求
        //HttpGet httpGet = new HttpGet("http://www.baidu.com/");
        HttpGet httpGet = new HttpGet("http://www.baidu.com/");

        CloseableHttpResponse response = null;
        try {
            // 执行请求
            response = httpclient.execute(httpGet);
            // 判断返回状态是否为200
            if (response.getStatusLine().getStatusCode() == 200) {
                String content = EntityUtils.toString(response.getEntity(), "UTF-8");
                System.out.println(content);
            }
        } finally {
            if (response != null) {
                response.close();
            }
            httpclient.close();
        }

    }

}

Get提交带参数

import java.net.URI;

import org.apache.http.client.methods.CloseableHttpResponse;
import org.apache.http.client.methods.HttpGet;
import org.apache.http.client.utils.URIBuilder;
import org.apache.http.impl.client.CloseableHttpClient;
import org.apache.http.impl.client.HttpClients;
import org.apache.http.util.EntityUtils;

public class DoGETParam {

	public static void main(String[] args) throws Exception {

		// 创建Httpclient对象
		CloseableHttpClient httpclient = HttpClients.createDefault();

		// 定义请求的参数
		// URI uri = new URIBuilder("http://www.baidu.com/s").setParameter("wd",
		// "java").build();
		// http://manager.taotao.com/rest/item?page=1&rows=30
		URI uri = new URIBuilder("http://www.baidu.com/rest/item").setParameter("page", "1")
				.setParameter("rows", "30").build();

		System.out.println(uri);

		// 创建http GET请求
		HttpGet httpGet = new HttpGet(uri);

		CloseableHttpResponse response = null;
		try {
			// 执行请求
			response = httpclient.execute(httpGet);
			// 判断返回状态是否为200
			if (response.getStatusLine().getStatusCode() == 200) {
				String content = EntityUtils.toString(response.getEntity(), "UTF-8");
				System.out.println(content);
			}
		} finally {
			if (response != null) {
				response.close();
			}
			httpclient.close();
		}

	}

}