JAVA httpClient post请求及接收示例代码

1、java原生httpClient4.5 post请求 

import java.util.HashMap;
import java.util.Map;

import net.sf.json.JSONObject;

import org.apache.http.HttpEntity;
import org.apache.http.HttpResponse;
import org.apache.http.client.config.RequestConfig;
import org.apache.http.client.methods.CloseableHttpResponse;
import org.apache.http.client.methods.HttpGet;
import org.apache.http.client.methods.HttpPost;
import org.apache.http.entity.StringEntity;
import org.apache.http.impl.client.CloseableHttpClient;
import org.apache.http.impl.client.HttpClientBuilder;
import org.apache.http.impl.client.HttpClients;
import org.apache.http.util.EntityUtils;

public class SendHttp {	
	/**
	 * java httpClient4.5 post请求
	 */
	@SuppressWarnings("unchecked")
	public static Map sendPost(String sendMsg, String sendUrl) {
		HttpPost httpPost = new HttpPost(sendUrl);
		HttpClientBuilder httpClientBuilder = HttpClientBuilder.create();
		CloseableHttpClient closeableHttpClient = httpClientBuilder.build();
		StringEntity entity;
		Map mres = new HashMap();
		try {
			entity = new StringEntity(sendMsg, "UTF-8"); //解决参数中文乱码问题
			entity.setContentEncoding("UTF-8");//设置编码格式
			entity.setContentType("application/json");
			httpPost.setEntity(entity);
			// 发起请求
			HttpResponse httpResponse = closeableHttpClient.execute(httpPost);
			// 请求结束，返回结果。并解析json。
			String resData = EntityUtils.toString(httpResponse.getEntity(),"UTF-8");
			mres = (Map) JSONObject.toBean(JSONObject.fromObject(resData), Map.class);
		} catch (Exception e) {
			e.printStackTrace();
		} finally {
			if (null != closeableHttpClient) {
				try {
					closeableHttpClient.close();
				} catch (Exception e) {
					e.printStackTrace();
				}
			}
		}
		return mres;
	}
	
	//测试发送请求
	public static void main(String[] args) throws Exception {
		Map sendMsg = new HashMap();
		sendMsg.put("user_name", "lanqinger");
		sendMsg.put("real_name", "蓝卿儿");
		String sendUrl = "http://localhost:8080/sm/test/getPostData.form";
		Map result = sendPost(JSONObject.fromObject(sendMsg).toString(),sendUrl);
		System.out.println(result);
	}
}

注意：StringEntity entity = new StringEntity(sendMsg, "UTF-8");才是真正解决传参（@RequestBody String requestBody）乱码的问题，这个问题费了我好大的劲才解决。。。

 

2、java原生HttpClient3.1 post请求

       /**
	 * java原生HttpClient3.1 post请求
	 */
	@SuppressWarnings("unchecked")
	public static Map sendPost2(String sendMsg, String sendUrl) {
		HttpClient httpclient = null;
		PostMethod post = null;
		String info = "";
		Map mres = new HashMap();
		try {
			httpclient = new HttpClient();
			post = new PostMethod(sendUrl);
			//解决中文乱码问题
			post.getParams().setParameter(HttpMethodParams.HTTP_CONTENT_CHARSET, "UTF-8");
			post.addParameter("info", sendMsg);
			httpclient.executeMethod(post);
			info = new String(post.getResponseBody(), "UTF-8");
			mres = (Map) JSONObject.toBean(JSONObject.fromObject(info), Map.class);
		} catch (Exception e) {
			mres.put("status", "9999");
			mres.put("message", "请求处理异常" + e.getMessage());
		} finally {
			// 关闭连接，释放资源
			post.releaseConnection();
		}
		return mres;
	}
	

接收请求：

import java.util.HashMap;  
import java.util.List;  
import java.util.Map;  
  
import javax.annotation.Resource;  
import javax.servlet.http.HttpServletRequest;  
import javax.servlet.http.HttpServletResponse;  
  
import net.sf.json.JSONObject;  
  
import org.apache.log4j.Logger;  
import org.springframework.stereotype.Controller;  
import org.springframework.web.bind.annotation.RequestBody;  
import org.springframework.web.bind.annotation.RequestMapping;  
import org.springframework.web.bind.annotation.ResponseBody;  
  
import com.lhm.service.UserInfoService;  
import com.lhm.value.UserInfoPage;  
  
@Controller  
@RequestMapping("/test")  
public class TestController {  
    @Resource  
    private UserInfoService userInfoService;  
      
    @RequestMapping(value="/getPostData.form", produces="application/json;charset=UTF-8")  
    @ResponseBody  
    public Object getPostData(@RequestBody String requestBody, HttpServletRequest request, HttpServletResponse response) throws Exception {  
        JSONObject json = JSONObject.fromObject(requestBody);  
        UserInfoPage userInfoPage = (UserInfoPage) JSONObject.toBean(json, UserInfoPage.class);  
        userInfoPage.setCurrentPage(1);  
        userInfoPage.setPageSize(10);  
        List> list = userInfoService.listUsersMap(userInfoPage);  
        Map map = new HashMap();  
        map.put("success", "1");  
        map.put("total", list.size());  
        map.put("message", "执行成功");  
        return JSONObject.fromObject(map).toString();  
    }  
}  

注意：produces="application/json;charset=UTF-8" 解决返回结果集中文乱码问题。