JAVA 使用httpclient发送常见HTTP POST 和 GET 请求-蒲公英云

JAVA 使用httpclient发送常见HTTP POST 和 GET 请求

JAVA项目开发中不可避免要发送http请求，http请求有get post请求，以下是自己整理的一个HTTP发送请求工具类。

maven pom文件配置

<dependency>
            <groupId>commons-httpclient</groupId>
            <artifactId>commons-httpclient</artifactId>
            <version>3.1</version>
        </dependency>

HTTP工具类

import org.apache.commons.httpclient.Header;
import org.apache.commons.httpclient.HttpClient;
import org.apache.commons.httpclient.HttpStatus;
import org.apache.commons.httpclient.URI;
import org.apache.commons.httpclient.methods.GetMethod;
import org.apache.commons.httpclient.methods.PostMethod;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import java.io.IOException;
import java.util.Map;
/** * @author yunfeng * @version V1.0 * @date 2018/5/3 16:33 */
public class HttpPostUtil { 
    private final static Logger log = LoggerFactory.getLogger(HttpPostUtil.class);
    /** * @param url * @return */
    public static String getData(String url) {
        HttpClient client = new HttpClient();
        GetMethod method = new GetMethod(url);
        log.info("reqUrl: " + url);
        String respStr = "";
        try {
            int statusCode = client.executeMethod(method);
            log.info("Status Code = " + statusCode);
            respStr = method.getResponseBodyAsString();
            method.releaseConnection();
        } catch (IOException e) {
            log.error("发送HTTP GET请求失败！详情：" + e.toString());
            e.printStackTrace();
        }
        return respStr;
    }
    /** * @param url * @param jsonStr * @return */
    public static String postJson(String url, String jsonStr) {
        HttpClient client = new HttpClient();
        PostMethod method = new PostMethod(url);
        method.setRequestHeader("Content-Type", "application/json;charset=utf-8");
        String postBody = buildPostData(jsonStr);
        log.info("reqUrl: " + url);
        log.info("postBody:\r\n" + postBody);
        method.setRequestBody(postBody);
        String respStr = "";
        try {
            int statusCode = client.executeMethod(method);
            log.info("Status Code = " + statusCode);
            respStr = method.getResponseBodyAsString();
// log.info("respStr:" + respStr);
            method.releaseConnection();
        } catch (IOException e) {
            log.error("发送HTTP POST JSON请求失败！详情：" + e.toString());
            e.printStackTrace();
        }
        return respStr;
    }
    /** * @param url * @param jsonStr * @return */
    public static String postJsonHeader(String url, Map<String, String> headerMap, String jsonStr) {
        HttpClient client = new HttpClient();
        PostMethod method = new PostMethod(url);
        method.setRequestHeader("Content-Type", "application/json;charset=utf-8");
        for (Map.Entry<String, String> entry : headerMap.entrySet()) {
            String key = entry.getKey();
            String val = entry.getValue();
            method.setRequestHeader(key, val);
        }
        String postBody = buildPostData(jsonStr);
        log.info("HTTP　ReqUrl: " + url);
        log.info("HTTP　ReqContent: Content-Type: application/json;charset=utf-8");
        log.info("HTTP PostBody:\r\n" + postBody);
        method.setRequestBody(postBody);
        String respStr = "";
        try {
            int statusCode = client.executeMethod(method);
            respStr = method.getResponseBodyAsString();
            if (statusCode == HttpStatus.SC_MOVED_PERMANENTLY || statusCode == HttpStatus.SC_MOVED_TEMPORARILY) {
                Header header = method.getResponseHeader("Location");
                String location = "";
                if (header != null) {
                    location = header.getValue();
                    method.setURI(new URI(location));
                    statusCode = client.executeMethod(method);
                    respStr = method.getResponseBodyAsString();
                }
            }
            log.info("Status Code = " + statusCode);
// log.info("respStr:" + respStr);
            method.releaseConnection();
        } catch (IOException e) {
            String detail = "发送HTTP POST JSON请求失败！详情：" + e.toString();
            log.error(detail, e);
            return null;
        }
        return respStr;
    }
    /** * @param url url * @param formStr form参数 * @return 请求返回 */
    public static String postForm(String url, String formStr) {
        log.info("post URL：" + url);
        HttpClient client = new HttpClient();
        PostMethod method = new PostMethod(url);
        method.setRequestHeader("Content-Type", "application/x-www-form-urlencoded");
        String postBody = buildPostData(formStr);
        log.info("postBody:\n" + postBody);
        method.setRequestBody(postBody);
        int statusCode = 0;
        String respStr = "";
        try {
            statusCode = client.executeMethod(method);
            log.info("http return status code = " + statusCode);
            respStr = method.getResponseBodyAsString();
// log.info("http return respStr = " + respStr);
        } catch (IOException e) {
            log.error("发送http form请求失败！详情：" + e.toString());
            e.printStackTrace();
        }
        method.releaseConnection();
        return respStr;
    }
    /** * @param formStr form参数 * @return */
    private static String buildPostData(String formStr) {
        StringBuilder sb = new StringBuilder();
        sb.append(formStr);
        sb.append("\r\n");
        sb.append("\r\n");
        return sb.toString();
    }
}