从request中获取到json

src/main/java/cn/chjyj/szwh/utils/SzReqUtils.java

@@ -0,0 +1,39 @@
+package cn.chjyj.szwh.utils;
+
+import com.alibaba.fastjson2.JSONObject;
+
+import javax.servlet.ServletInputStream;
+import javax.servlet.http.HttpServletRequest;
+import java.io.BufferedReader;
+import java.io.InputStreamReader;
+
+public class SzReqUtils {
+    /**
+     * 从request 请求获取到json内容
+     * @param request
+     * @return
+     */
+    public static JSONObject getJson(HttpServletRequest request){
+        try {
+            //从前端获取输入字节流
+            ServletInputStream requestInputStream = request.getInputStream();
+            //将字节流转换为字符流,并设置字符编码为utf-8
+            InputStreamReader ir = new InputStreamReader(requestInputStream, "utf-8");
+            //使用字符缓冲流进行读取
+            BufferedReader br = new BufferedReader(ir);
+            //开始拼装json字符串
+            String line = null;
+            StringBuilder sb = new StringBuilder();
+            while ((line = br.readLine()) != null) {
+                sb.append(line);
+            }
+            // 转为json 对象返回
+            JSONObject json = JSONObject.parseObject(sb.toString());
+            return json;
+        }catch (Exception ex){
+            // do nothing
+            return null;
+        }
+    }
+
+}