添加了http发送工具类

--HttpSendUtils.java
添加了发送get请求，获取返回的body转换成字符串 方法
发送post请求，参数为json格式。取返回的body转换成字符串 方法

main/manager-api/src/main/java/xiaozhi/common/utils/HttpSendUtils.java

@@ -0,0 +1,64 @@
+package xiaozhi.common.utils;
+
+import lombok.extern.slf4j.Slf4j;
+import okhttp3.*;
+import org.jetbrains.annotations.Nullable;
+import org.springframework.stereotype.Component;
+import xiaozhi.common.exception.RenException;
+
+import java.io.IOException;
+
+@Slf4j
+@Component
+public class HttpSendUtils {
+    private OkHttpClient client = new OkHttpClient();
+
+    /**
+     * 发送get请求，获取返回的body转换成字符串
+     * @param url get请求地址
+     * @return body内容
+     */
+    public String fetchGetBodyAsString(String url) {
+        Request request = new Request.Builder()
+                .url(url)
+                .build();
+        return getString(url, request);
+    }
+
+    /**
+     * 发送post请求，参数为json格式。取返回的body转换成字符串
+     * @param url post请求地址
+     * @param json json参数
+     * @return body内容
+     */
+    public String fetchJsonPostBodyAsString(String url,String json) {
+        // 创建请求体
+        MediaType JSON = MediaType.get("application/json; charset=utf-8");
+        RequestBody body = RequestBody.create(json, JSON);
+
+        Request request = new Request.Builder()
+                .url(url)
+                .post(body)
+                .build();
+
+        return getString(url, request);
+    }
+
+    private String getString(String url, Request request) {
+        String body = null;
+        try (Response response = client.newCall(request).execute()) {
+            if (response.isSuccessful()) {
+                if (response.body() != null){
+                    body = response.body().string();
+                }
+            } else {
+                throw new RenException("请求失败，错误码："+response.code());
+            }
+        } catch (Exception e) {
+            String method = request.method();
+            log.error("{}请求发送错误地址：{} \n 发送错误信息:{}",method, url,e.getMessage());
+            throw new RenException("请求发送失败");
+        }
+        return body;
+    }
+}