java 接受和发送http，post，get请求，参数中文乱码解决。

maven 坐标

        
		
		    org.apache.httpcomponents
		    httpclient
		    4.5.1
		

一，发送post和get请求

http工具类

public class HttpUtils {
    /** 
     * 发送 get请求 
     */  
    public static String get(String param,String URL) {  
        CloseableHttpClient httpclient = HttpClients.createDefault(); 
        String obj=null;
        try {  
            HttpUriRequest httpget = new HttpGet(URL+"?"+param);
            // 执行get请求.    
            CloseableHttpResponse response = httpclient.execute(httpget);  
            try {  
                // 获取响应实体    
                HttpEntity entity = response.getEntity();  
                // 打印响应状态    
                System.out.println(response.getStatusLine());  
                if (entity != null) {  
                    obj=EntityUtils.toString(entity);
                }  
            } finally {  
                response.close();  
            }  
        } catch (ClientProtocolException e) {  
            e.printStackTrace();  
        } catch (ParseException e) {  
            e.printStackTrace();  
        } catch (IOException e) {  
            e.printStackTrace();  
        } finally {  
            // 关闭连接,释放资源    
            try {  
                httpclient.close();  
            } catch (IOException e) {  
                e.printStackTrace();  
            }  
        }
		return obj;  
    } 


/** 
 * 发送 post请求
 */  
public static String post(String json,String URL) { 
	  String obj=null;
      // 创建默认的httpClient实例.    
      CloseableHttpClient httpclient = HttpClients.createDefault();  
      // 创建httppost    
      HttpPost httppost = new HttpPost(URL);  
      httppost.addHeader("Content-type", "application/json; charset=utf-8");
      httppost.setHeader("Accept", "application/json");
    try {  
    	StringEntity s = new StringEntity(json,Charset.forName("UTF-8"));  //对参数进行编码，防止中文乱码
    	s.setContentEncoding("UTF-8");
    	httppost.setEntity(s);
        CloseableHttpResponse response = httpclient.execute(httppost);  
        try {  
        	//获取相应实体
            HttpEntity entity = response.getEntity();  
            if (entity != null) {  
            	obj=EntityUtils.toString(entity, "UTF-8");
            }  
            
        } finally {  
            response.close();  
        }  
    } catch (ClientProtocolException e) {  
        e.printStackTrace();  
    } catch (UnsupportedEncodingException e1) {  
        e1.printStackTrace();  
    } catch (IOException e) {  
        e.printStackTrace();  
    } finally {  
        // 关闭连接,释放资源    
        try {  
            httpclient.close();  
        } catch (IOException e) {  
            e.printStackTrace();  
        }  
    }  
    return obj;
}  
}

json工具类

public final class JSONUtil {

	public static  String toJson(T t){
		return JSON.toJSONString(t);
	}
	
	public static T parseJson(String text,Class clazz){
		return JSON.parseObject(text, clazz);
	}
}

控制层

//发送post请求
Obj obj=new Obj（）//参数 任意实体类
HttpUtils.post(JSONUtil.toJson(obj), "http://www.baidu.com");
//发送get请求
String param="param1=" + URLEncoder.encode("中国", "UTF-8") + "¶m2=value2";
HttpUtils.get(param, "http://www.baidu.com");

二 接受 http请求

接收post请求

  //接收post请求需要加@RequestBody
  @RequestMapping(value="test",method=RequestMethod.POST)
  @ResponseBody
 public MyResult