public class MainActivity extends AppCompatActivity {

public static final String TAG = "MainActivity";
public static final MediaType JSON=MediaType.parse("application/json; charset=utf-8");
@Override
protected void onCreate(Bundle savedInstanceState) {
 super.onCreate(savedInstanceState);
 setContentView(R.layout.activity_main);
 //开启一个线程，做联网操作
 new Thread() {
  @Override
  public void run() {

   postJson()；
  }
 }.start();
}

 private void postJson() {
 //申明给服务端传递一个json串
 //创建一个OkHttpClient对象
 OkHttpClient okHttpClient = new OkHttpClient();
 //创建一个RequestBody(参数1：数据类型 参数2传递的json串)
 RequestBody requestBody = RequestBody.create(JSON, json);
 //创建一个请求对象
 Request request = new Request.Builder()
   .url("http://192.168.0.102:8080/TestProject/JsonServlet")
   .post(requestBody)
   .build();
 //发送请求获取响应
 try {
 Response response=okHttpClient.newCall(request).execute();
  //判断请求是否成功
  if(response.isSuccessful()){\
   //打印服务端返回结果
   Log.i(TAG,response.body().string());

  }
 } catch (IOException e) {
  e.printStackTrace();
 }

}

}

import java.lang.reflect.Array;
import java.lang.reflect.GenericArrayType;
import java.lang.reflect.ParameterizedType;
import java.lang.reflect.Type;

public class TypeInfo {
 //Type泛型对象类型
 private Class<?> componentType;
 //Type所属对象类型
 private Class<?> rawType;
 //type
 private Type type;

 private TypeInfo(Class<?> rawType, Class<?> componentType) {

  this.componentType = componentType;
  this.rawType = rawType;
 }

 public static TypeInfo createArrayType(Class<?> componentType) {
  return new TypeInfo(Array.class, componentType);
 }

 public static TypeInfo createNormalType(Class<?> componentType) {
  return new TypeInfo(null, componentType);
 }

 public static TypeInfo createParameterizedType(Class<?> rawType, Class<?> componentType) {
  return new TypeInfo(rawType, componentType);
 }

 public TypeInfo(Type type) {
  this.type = type;
  if (type instanceof ParameterizedType) {
   //返回 Type 对象，表示声明此类型的类或接口。
   this.rawType = (Class<?>) ((ParameterizedType) type).getRawType();
   //getActualTypeArguments()返回表示此类型实际类型参数的 Type 对象的数组。
   Type[] actualTypeArguments = ((ParameterizedType) type).getActualTypeArguments();
   this.componentType = (Class<?>) actualTypeArguments[0];
   // typeReference=new TypeReference<Map<componentType,componentType>>(){};

  } else if (type instanceof GenericArrayType) {
   //返回 Type 对象，表示声明此类型的类或接口。
   this.rawType = Array.class;
   // 表示一种元素类型是参数化类型或者类型变量的数组类型
   this.componentType = (Class<?>) ((GenericArrayType) type).getGenericComponentType();
  } else {
   this.componentType = (Class<?>) type;
  }
 }

 public Type getType() {
  return type;
 }

 public Class<?> getComponentType() {
  return componentType;
 }


 public Class<?> getRawType() {
  return rawType;
 }

}

import java.lang.reflect.ParameterizedType;
import java.lang.reflect.Type;

public class ReqClassUtils {

 public static TypeInfo getCallbackGenericType(Class<?> clazz) {
  //获得带有泛型的父类
  Type genericSuperclass = clazz.getGenericSuperclass();//Type是 Java 编程语言中所有类型的公共高级接口。它们包括原始类型、参数化类型、数组类型、类型变量和基本类型。
  TypeInfo type = getGetnericType(genericSuperclass);
  if (type == null) {
   Type[] genericInterfaces = clazz.getGenericInterfaces();
   if (genericInterfaces != null && genericInterfaces.length > 0) {
    type = getGetnericType(genericInterfaces[0]);
   }
  }
  return type;
 }

 private static TypeInfo getGetnericType(Type type) {
  if (type != null && type instanceof ParameterizedType) {
   //getActualTypeArguments获取参数化类型的数组，泛型可能有多个
   Type[] args = ((ParameterizedType) type).getActualTypeArguments();
   if (args != null && args.length > 0) {
    return new TypeInfo(args[0]);
   }
  }
  return null;
 }
}

import com.alibaba.fastjson.JSON;
import com.alibaba.fastjson.JSONException;
import com.alibaba.fastjson.JSONObject;
import java.lang.reflect.Array;
import java.util.Collection;
import java.util.HashMap;
import java.util.Map;

import static com.alibaba.fastjson.JSON.parseObject;

public class ReqJsonUtils {

 //基本类型映射关系Map
 private static final Map primitiveWrapperTypeMap = new HashMap(8);

 static {
  //添加基本类型
  primitiveWrapperTypeMap.put(Boolean.class, boolean.class);
  primitiveWrapperTypeMap.put(Byte.class, byte.class);
  primitiveWrapperTypeMap.put(Character.class, char.class);
  primitiveWrapperTypeMap.put(Double.class, double.class);
  primitiveWrapperTypeMap.put(Float.class, float.class);
  primitiveWrapperTypeMap.put(Integer.class, int.class);
  primitiveWrapperTypeMap.put(Long.class, long.class);
  primitiveWrapperTypeMap.put(Short.class, short.class);
 }

 /**
  * 将JSON字符串转换成指定的用户返回值类型
  *
  * @param type
  * @param jsonData
  * @return
  * @throws JSONException
  */
 public static <T> T parseHttpResult(TypeInfo type, String jsonData) throws JSONException {
  // 处理Void类型的返回值
  if (Void.class.isAssignableFrom(type.getComponentType())) {
   return null;
  }
  //获取当前type的数据类型
  Class<?> rawType = type.getRawType();
  //是否是Array
  boolean isArray = rawType != null && Array.class.isAssignableFrom(rawType);
  //是否是Collection
  boolean isCollection = rawType != null && Collection.class.isAssignableFrom(rawType);
  //是否是Map
  boolean isMap = rawType != null && Map.class.isAssignableFrom(rawType);
  //获取泛型类型
  Class<?> componentType = type.getComponentType();
  //声明结果对象
  T result = null;
  if (isCollection) {//处理collection
   result = (T) JSON.parseArray(jsonData, componentType);
  } else if (isArray) {//处理array
   result = (T) JSON.parseArray(jsonData, componentType).toArray();
  } else if (isMap) {//处理Map
   result = (T) JSONObject.parseObject(jsonData, type.getType());
  } else if (componentType.isAssignableFrom(String.class)) {//处理字符串返回值
   return (T) jsonData;
  } else {
   // 接口的返回类型如果是简单类型，则会封装成为一个json对象，真正的对象存储在value属性上
   if (isPrimitiveOrWrapper(componentType)) {
    result = (T) parseObject(jsonData);
   } else {
    //处理自定义对象
    result = (T) parseObject(jsonData, componentType);
   }
  }
  return result;
 }

 /**
  * 判断是否是基本数据类型
  *
  * @param clazz
  * @return
  */
 public static boolean isPrimitiveOrWrapper(Class clazz) {
  return (clazz.isPrimitive() || isPrimitiveWrapper(clazz));
 }

 /**
  * 判断是否是基本数据类型
  *
  * @param clazz
  * @return
  */
 public static boolean isPrimitiveWrapper(Class clazz) {
  return primitiveWrapperTypeMap.containsKey(clazz);
 }
}

 TypeInfo typeInfo = ReqClassUtils.getCallbackGenericType(callBack.getClass());
 callBack.onReqSuccess(ReqJsonUtils.parseHttpResult(typeInfo, jsonData));

  HashMap<String, String> paramsMap = new HashMap<>();
  paramsMap.put("sourceType", "2");
  paramsMap.put("sourceDesc", "[Android]" + Build.VERSION.RELEASE + "[Mobel]" + Build.BRAND + " " + Build.MODEL + Build.DEVICE);
  HashMap<String, String> params = dealStringBody(paramsMap);
  RequestManager.getInstance(this).requestAsyn("xxx/actionUrl", RequestManager.TYPE_POST_JSON, params, new ReqCallBack<String>() {

   @Override
   public void onReqSuccess(String result) {
    request_tv.setText(result);
   }

   @Override
   public void onReqFailed(String errorMsg) {

   }
  });

  new ReqCallBack<List<Object>>();//集合collection
  new ReqCallBack<Map<String, User>>();//map
  new ReqCallBack<Void>();//Void
  new ReqCallBack<Long>();//基础类型