常用的okhttp post上传方式

1.常见的form形式，代码如下：

FormBody.Builder builder = new FormBody.Builder();for (Param param : params) {    builder.add(param.key, param.value);}
RequestBody requestBody = builder.build();

2.直接上传JSON格式

public static final MediaType JSON = MediaType.parse("application/json; charset=utf-8");
RequestBody requestBody = RequestBody.create(JSON, json（json格式的数据）);