修复一个奇怪的bug

weixin4j-base/src/main/java/com/foxinmy/weixin4j/http/factory/HttpComponent3Factory.java

@@ -13,6 +13,11 @@ import org.apache.commons.httpclient.HttpClient;
  */
 public class HttpComponent3Factory extends HttpClientFactory {
 
+	public HttpComponent3Factory() {
+		// odd bug
+		Class _ = HttpClient.class;
+	}
+
 	@Override
 	public com.foxinmy.weixin4j.http.HttpClient newInstance() {
 		return new HttpComponent3(new HttpClient());

weixin4j-base/src/main/java/com/foxinmy/weixin4j/http/factory/HttpComponent4Factory.java

@@ -14,11 +14,16 @@ import com.foxinmy.weixin4j.http.HttpClient;
  * @see
  */
 public class HttpComponent4Factory extends HttpClientFactory {
+	
+	private final VersionInfo version;
+
+	public HttpComponent4Factory() {
+		version = VersionInfo.loadVersionInfo("org.apache.http.client",
+				HttpClient.class.getClassLoader());
+	}
 
 	@Override
 	public HttpClient newInstance() {
-		VersionInfo version = VersionInfo.loadVersionInfo(
-				"org.apache.http.client", HttpClient.class.getClassLoader());
 		String release = (version != null) ? version.getRelease()
 				: VersionInfo.UNAVAILABLE;
 		if (release.startsWith("4.")) {