规范package，为发布到maven central repository做准备

src/main/java/me/chanjar/weixin/util/http/Utf8ResponseHandler.java

@@ -0,0 +1,32 @@
+package me.chanjar.weixin.util.http;
+
+import java.io.IOException;
+
+import org.apache.http.Consts;
+import org.apache.http.HttpEntity;
+import org.apache.http.HttpResponse;
+import org.apache.http.StatusLine;
+import org.apache.http.client.HttpResponseException;
+import org.apache.http.client.ResponseHandler;
+import org.apache.http.util.EntityUtils;
+
+/**
+ * copy from {@link org.apache.http.impl.client.BasicResponseHandler}
+ * @author chanjarster
+ *
+ */
+public class Utf8ResponseHandler implements ResponseHandler<String> {
+
+  public static final ResponseHandler<String> INSTANCE = new Utf8ResponseHandler();
+  
+  public String handleResponse(final HttpResponse response) throws HttpResponseException, IOException {
+    final StatusLine statusLine = response.getStatusLine();
+    final HttpEntity entity = response.getEntity();
+    if (statusLine.getStatusCode() >= 300) {
+      EntityUtils.consume(entity);
+      throw new HttpResponseException(statusLine.getStatusCode(), statusLine.getReasonPhrase());
+    }
+    return entity == null ? null : EntityUtils.toString(entity, Consts.UTF_8);
+  }
+
+}