开发jsapi支付 时。 //1.配制商户号 Config con =new RSAPublicKeyConfig.Builder() .merchantId(weixinConfig.mchid) .privateKeyFromPath(weixinConfig.mchprivateKeypath) .publicKeyFromPath(weixinConfig.wxPubliKeyPath) .publicKeyId(weixinConfig.wxPublicKeyId) .merchantSerialNumber(weixinConfig.mchSerialNumber) .apiV3Key(weixinConfig.apiv3key) .build(); JsapiServiceExtension jsapiService = new JsapiServiceExtension.Builder().config(con).build(); 调用用 JsapiServiceExtension 出现这个错误，java.lang.NoClassDefFoundError: Could not initialize class com.wechat.pay.java.core.http.DefaultHttpClientBuilder