httpClient访问远程接口工具类

淩亂°似流年 2022-06-02 01:09 186阅读 0赞

package xmodule.test;

import java.io.IOException;  
import java.io.UnsupportedEncodingException;  
import java.net.URLEncoder;  
import java.util.Map;

import org.apache.http.HttpResponse;  
import org.apache.http.auth.AuthScope;  
import org.apache.http.auth.UsernamePasswordCredentials;  
import org.apache.http.client.CredentialsProvider;  
import org.apache.http.client.methods.HttpDelete;  
import org.apache.http.client.methods.HttpGet;  
import org.apache.http.client.methods.HttpPost;  
import org.apache.http.client.methods.HttpPut;  
import org.apache.http.client.methods.HttpRequestBase;  
import org.apache.http.client.protocol.HttpClientContext;  
import org.apache.http.entity.StringEntity;  
import org.apache.http.impl.client.BasicCredentialsProvider;  
import org.apache.http.impl.client.DefaultHttpClient;  
import org.apache.http.params.CoreConnectionPNames;  
import org.apache.http.util.EntityUtils;

/\*\*  
\*

* 功能：httpClient访问远程接口工具类 
    
     * 日期：2015年3月17日 上午11:19:21 
    
     *

\*/  
@SuppressWarnings(“deprecation”)  
public class HttpClientUtil \{  
public static void main(String\[\] args) \{  
String url = “ [http://wechattest.nbmetro.com:8080/api/appstore/userInfo?accessToken=YJ26Gb5aFle0K7VyGaiMiOCeiu96YE4Q&openId=ffdzfHoUHfo5HHaa][http_wechattest.nbmetro.com_8080_api_appstore_userInfo_accessToken_YJ26Gb5aFle0K7VyGaiMiOCeiu96YE4Q_openId_ffdzfHoUHfo5HHaa]“;  
String requestMethod = “get”;  
String result = httpRequestToString(url, requestMethod, null, null);  
System.out.println(result);  
\}

/**
     * <pre>
     * 方法体说明：向远程接口发起请求，返回字符串类型结果
     * @param url 接口地址
     * @param requestMethod 请求类型
     * @param params 传递参数
     * @return String 返回结果
     * </pre>
     */
    public static String httpRequestToString(String url, String requestMethod,
            Map<String, String> params, String ...auth){
        //接口返回结果
        String methodResult = null;
        try {
            String parameters = "";
            boolean hasParams = false;
            //将参数集合拼接成特定格式，如name=zhangsan&age=24
            if(params!=null){
                   for(String key : params.keySet()){
                       String value = URLEncoder.encode(params.get(key), "UTF-8");
                       parameters += key +"="+ value +"&";
                       hasParams = true;
                   }
            }
    
            if(hasParams){
                parameters = parameters.substring(0, parameters.length()-1);
            }
            //是否为GET方式请求
            boolean isGet = "get".equalsIgnoreCase(requestMethod);
            boolean isPost = "post".equalsIgnoreCase(requestMethod);
            boolean isPut = "put".equalsIgnoreCase(requestMethod);
            boolean isDelete = "delete".equalsIgnoreCase(requestMethod);
    
            //创建HttpClient连接对象
            DefaultHttpClient client = new DefaultHttpClient();
            HttpRequestBase method = null;
            if(isGet){
                url += "?" + parameters;
                method = new HttpGet(url);
            }else if(isPost){
                method = new HttpPost(url);
                HttpPost postMethod = (HttpPost) method;
                StringEntity entity = new StringEntity(parameters);
                postMethod.setEntity(entity);
            }else if(isPut){
                method = new HttpPut(url);
                HttpPut putMethod = (HttpPut) method;
                StringEntity entity = new StringEntity(parameters);
                putMethod.setEntity(entity);
            }else if(isDelete){
                url += "?" + parameters;
                method = new HttpDelete(url);
            }
            method.getParams().setParameter(CoreConnectionPNames.CONNECTION_TIMEOUT, 6000);
            //设置参数内容类型
            method.addHeader("Content-Type","application/x-www-form-urlencoded");
            //httpClient本地上下文
            HttpClientContext context = null;
            if(!(auth==null || auth.length==0)){
                String username = auth[0];
                String password = auth[1];
                UsernamePasswordCredentials credt = new UsernamePasswordCredentials(username,password);
                //凭据提供器
                CredentialsProvider provider = new BasicCredentialsProvider();
                //凭据的匹配范围
                provider.setCredentials(AuthScope.ANY, credt);
                context = HttpClientContext.create();
                context.setCredentialsProvider(provider);
            }
            //访问接口，返回状态码
            HttpResponse response = client.execute(method, context);
            //返回状态码200，则访问接口成功
            if(response.getStatusLine().getStatusCode()==200){
                methodResult = EntityUtils.toString(response.getEntity());
            }
            client.close();
        }catch (UnsupportedEncodingException e) {
            e.printStackTrace();
        }catch (IOException e) {
            e.printStackTrace();
        }
        return methodResult;
    }

[http_wechattest.nbmetro.com_8080_api_appstore_userInfo_accessToken_YJ26Gb5aFle0K7VyGaiMiOCeiu96YE4Q_openId_ffdzfHoUHfo5HHaa]: http://wechattest.nbmetro.com:8080/api/appstore/userInfo?accessToken=YJ26Gb5aFle0K7VyGaiMiOCeiu96YE4Q&openId=ffdzfHoUHfo5HHaa