import java.util.HashMap;import java.util.Map;import org.apache.http.client.HttpClient;import org.apache.http.impl.client.DefaultHttpClient;import org.apache.http.impl.client.DefaultHttpRequestRetryHandler;import org.apache.http.impl.conn.tsccm.ThreadSafeClientConnManager;import org.jboss.resteasy.client.jaxrs.ResteasyClient;import org.jboss.resteasy.client.jaxrs.ResteasyClientBuilder;import org.jboss.resteasy.client.jaxrs.ResteasyWebTarget;import org.jboss.resteasy.client.jaxrs.engines.ApacheHttpClient4Engine;import org.springframework.beans.factory.InitializingBean;public class RestClientUtil implements InitializingBean{	private HttpClient httpClient;	private ResteasyWebTarget target;		//访问地址。e.g http://127.0.0.1:8080	private String targetAddress ; 				public RestClientUtil(){		try{			ThreadSafeClientConnManager connectionManager = new ThreadSafeClientConnManager();			connectionManager.setMaxTotal(2000);			connectionManager.setDefaultMaxPerRoute(200);			this.httpClient =new DefaultHttpClient(connectionManager);			((DefaultHttpClient)this.httpClient).setHttpRequestRetryHandler(new DefaultHttpRequestRetryHandler());		}catch(Exception e){			throw new RuntimeException(e);		}	}		[@Override](https://my.oschina.net/u/1162528)	public void afterPropertiesSet() throws Exception {		ResteasyClient client = new ResteasyClientBuilder().httpEngine(new ApacheHttpClient4Engine(httpClient)).build();		target = client.target(targetAddress);	}				private Map
    
     ,Object> proxyMap = new HashMap
     
      ,Object>();	public 
      
        T proxy(Class
       
         cls){		T obj = (T)proxyMap.get(cls);		synchronized(this){			if(obj == null){				obj = (T)target.proxy(cls);				proxyMap.put(cls, obj);			}		}		return obj;	}		public String getTargetAddress() {		return targetAddress;	}	public void setTargetAddress(String targetAddress) {		this.targetAddress = targetAddress;	}}