OkHttp3找不到FormEncodingBuilder

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http://blog.csdn.net/xw1_xw/article/details/50724864

okhttp3.FormBody instead of FormEncodingBuilder.（OkHttp3.x，FormEncodingBuilder已被FormBody取代）

OkHttpClient client = new OkHttpClient();
FormBody body = new FormBody.Builder()
     .add("your_param_1", "your_value_1")
     .add("your_param_2", "your_value_2")
     .build();
Request request = new Request.Builder()
     .url("http://my.wonderfull.url/to/post")
     .post(body)
     .build();
Response response = client.newCall(request).execute();

https://github.com/square/okhttp，OkHttp3.x与2.x不同之处见CHANGELOG.md