新增：新增获取图片验证码 API（引入 Redisson、Hutool、Easy Captcha 依赖，详情可见 README 介绍）

continew-admin-common/src/main/java/top/charles7c/cnadmin/common/model/vo/R.java

@@ -0,0 +1,101 @@
+/*
+ * Copyright (c) 2022-present Charles7c Authors. All Rights Reserved.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package top.charles7c.cnadmin.common.model.vo;
+
+import java.io.Serializable;
+import java.time.LocalDateTime;
+
+import lombok.AccessLevel;
+import lombok.Data;
+import lombok.NoArgsConstructor;
+
+import org.springframework.http.HttpStatus;
+
+import com.fasterxml.jackson.annotation.JsonFormat;
+
+/**
+ * 响应信息
+ *
+ * @author Charles7c
+ * @since 2022/12/10 23:31
+ */
+@Data
+@NoArgsConstructor(access = AccessLevel.PRIVATE)
+public class R<V extends Serializable> implements Serializable {
+
+    private static final long serialVersionUID = 1L;
+
+    /** 是否成功 */
+    private boolean success;
+    /** 状态码 */
+    private int code;
+    /** 状态信息 */
+    private String msg;
+    /** 返回数据 */
+    private V data;
+    /** 时间戳 */
+    @JsonFormat(pattern = "yyyy-MM-dd HH:mm:ss")
+    private LocalDateTime timestamp = LocalDateTime.now();
+
+    /** 成功状态码 */
+    private static final int SUCCESS_CODE = HttpStatus.OK.value();
+    /** 失败状态码 */
+    private static final int FAIL_CODE = HttpStatus.INTERNAL_SERVER_ERROR.value();
+
+    private R(boolean success, int code, String msg, V data) {
+        this.success = success;
+        this.code = code;
+        this.msg = msg;
+        this.data = data;
+    }
+
+    public static <V extends Serializable> R<V> ok() {
+        return new R<>(true, SUCCESS_CODE, "操作成功", null);
+    }
+
+    public static <V extends Serializable> R<V> ok(V data) {
+        return new R<>(true, SUCCESS_CODE, "操作成功", data);
+    }
+
+    public static <V extends Serializable> R<V> ok(String msg) {
+        return new R<>(true, SUCCESS_CODE, msg, null);
+    }
+
+    public static <V extends Serializable> R<V> ok(String msg, V data) {
+        return new R<>(true, SUCCESS_CODE, msg, data);
+    }
+
+    public static <V extends Serializable> R<V> fail() {
+        return new R<>(false, FAIL_CODE, "操作失败", null);
+    }
+
+    public static <V extends Serializable> R<V> fail(String msg) {
+        return new R<>(false, FAIL_CODE, msg, null);
+    }
+
+    public static <V extends Serializable> R<V> fail(V data) {
+        return new R<>(false, FAIL_CODE, "操作失败", data);
+    }
+
+    public static <V extends Serializable> R<V> fail(String msg, V data) {
+        return new R<>(false, FAIL_CODE, msg, data);
+    }
+
+    public static <V extends Serializable> R<V> fail(int code, String msg) {
+        return new R<>(false, code, msg, null);
+    }
+}