初始化

src/main/java/com/blog/common/R.java

@@ -0,0 +1,33 @@
+package com.blog.common;
+
+import lombok.Data;
+
+@Data
+public class R<T> {
+
+    private int code;
+    private String msg;
+    private T data;
+    R(int code, String msg){
+        this.code = code;
+        this.msg = msg;
+    }
+    R(int code, String msg, T data){
+        this.code = code;
+        this.msg = msg;
+        this.data = data;
+    }
+
+
+    public static <T> R<T> ok(String msg) {
+        return new R<>(0,msg);
+    }
+
+    public static <T> R<T> ok(String msg, T data) {
+        return new R<>(0,msg,data);
+    }
+
+    public static <T> R<T> err(String msg) {
+        return new R<>(-1,msg);
+    }
+}