网络请求 okhttp post

我使用下面的方法进行post请求 为何一直返回的是get请求的数据????????
OkHttpClient mOkHttpClient=new OkHttpClient();

    FormEncodingBuilder builder=new FormEncodingBuilder();
    builder.add("userName", user);
    builder.add("passWord", pass);
    Request request=new Request.Builder()
            .url(GetUrl.Url1)
            .post(builder.build())
            .build();
    try {
       com.squareup.okhttp.Response response= mOkHttpClient.newCall(request).execute();
        String info=response.body().string();
        Log.d("TAG", "info=" + info);
    } catch (IOException e) {
        e.printStackTrace();
    }
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