更改了响应体包装类，改为ResponseList和ResponseMap两个类包装，添加了BeanUtils和DoNotDeserialize注释

src/main/java/cn/edu/hfut/rmdjzz/projectmanagement/annotation/DoNotDeserialize.java

@@ -0,0 +1,19 @@
+package cn.edu.hfut.rmdjzz.projectmanagement.annotation;
+
+import cn.edu.hfut.rmdjzz.projectmanagement.utils.BeanUtils;
+
+import java.lang.annotation.ElementType;
+import java.lang.annotation.Retention;
+import java.lang.annotation.RetentionPolicy;
+import java.lang.annotation.Target;
+
+/**
+ * 用于{@link BeanUtils#beanToMap(Object, boolean, boolean)}时，当成员变量被标注本注释时，就不会被该方法放入Map
+ *
+ * @author 佘语殊
+ * @since 2022/6/28 21:42
+ */
+@Retention(RetentionPolicy.RUNTIME)
+@Target({ElementType.FIELD})
+public @interface DoNotDeserialize {
+}

src/main/java/cn/edu/hfut/rmdjzz/projectmanagement/entity/Staff.java

@@ -14,6 +14,6 @@ public class Staff {
     private Integer staffId;
     private String staffUsername;
     private String staffPassword;
-    private String staffNickname;
+    private String staffFullname;
     private String staffGender;
 }

src/main/java/cn/edu/hfut/rmdjzz/projectmanagement/utils/BeanUtils.java

@@ -0,0 +1,83 @@
+package cn.edu.hfut.rmdjzz.projectmanagement.utils;
+
+import cn.edu.hfut.rmdjzz.projectmanagement.annotation.DoNotDeserialize;
+import com.baomidou.mybatisplus.core.toolkit.StringUtils;
+
+import java.beans.PropertyDescriptor;
+import java.lang.reflect.Field;
+import java.lang.reflect.Method;
+import java.util.HashMap;
+import java.util.Map;
+
+/**
+ * @author 佘语殊
+ * @since 2022/6/28 21:41
+ */
+public class BeanUtils {
+    /**
+     * 将bean转成map，被标注{@link DoNotDeserialize}注释的变量会被跳过
+     *
+     * @param putNulls 是否将值为null的变量也放入结果map
+     * @param toUnderline 是否将变量命名转为下划线型
+     */
+    public static Map<String, Object> beanToMap(Object object, boolean toUnderline, boolean putNulls) {
+        Map<String, Object> map = new HashMap<>();
+        if (object == null) {
+            return map;
+        }
+        Field[] fields = object.getClass().getDeclaredFields();
+        Class<?> clazz = object.getClass();
+        for (Field field : fields) {
+            String fieldName = field.getName();
+            if (fieldName.equals("serialVersionUID") || field.getAnnotation(DoNotDeserialize.class) != null) {
+                continue;
+            }
+            String key = toUnderline ? StringUtils.camelToUnderline(fieldName) : fieldName;
+            try {
+                PropertyDescriptor pd = new PropertyDescriptor(fieldName, clazz);
+                Method method = pd.getReadMethod();
+                Object value = method.invoke(object);
+                if (putNulls || value != null) {
+                    map.put(key, value);
+                }
+            } catch (Exception e) {
+                e.printStackTrace();
+            }
+        }
+        return map;
+    }
+
+    public static Map<String, Object> beanToMap(Object object, boolean toUnderline) {
+        return beanToMap(object, toUnderline, true);
+    }
+
+    public static Map<String, Object> beanToMap(Object object) {
+        return beanToMap(object, true, true);
+    }
+
+    /**
+     * 检查是否objects全都非null
+     * @return 都非null则true，否则false
+     */
+    public static boolean checkAllNotNull(Object... objects) {
+        for (Object object : objects) {
+            if (object == null) {
+                return false;
+            }
+        }
+        return true;
+    }
+
+    /**
+     * 检查是否objects含有非null
+     * @return 有则true，否则false
+     */
+    public static boolean checkAnyNotNull(Object... objects) {
+        for (Object object : objects) {
+            if (object != null) {
+                return true;
+            }
+        }
+        return false;
+    }
+}

src/main/java/cn/edu/hfut/rmdjzz/projectmanagement/utils/response/ResponseList.java

@@ -1,44 +1,62 @@
-package cn.edu.hfut.rmdjzz.projectmanagement.entity;
+package cn.edu.hfut.rmdjzz.projectmanagement.utils.response;
 
 import com.baomidou.mybatisplus.extension.plugins.pagination.Page;
 import lombok.AccessLevel;
 import lombok.AllArgsConstructor;
 import lombok.Data;
+import org.springframework.http.HttpStatus;
 
 import java.util.*;
 import java.util.stream.Collectors;
 
 /**
- * 用于包装响应体的实体类，静态调用用of方法实例化对象，例：<br/>
+ * 用于包装响应体、返回列表型数据的实体类，静态调用用of方法实例化对象，例：<br/>
- * {@code return ResponseEntity.<User>of(HttpStatus.OK.value(),"查询成功！",result);}
+ * {@code return ResponseList.<User>of(HttpStatus.OK.value(),"查询成功！",result);}
+ *
  * @author 佘语殊
  * @since 2022/6/28 11:59
  */
 @SuppressWarnings({"unchecked", "varargs"})
 @Data
 @AllArgsConstructor(access = AccessLevel.PRIVATE)
-public class ResponseEntity<T> {
+public class ResponseList<T> {
     private Integer code;
     private String msg;
     private QueryPage<T> data;
 
     /**
-     * 静态构造函数
+     * 静态构造函数，data可以不填，最终会构造一个total为0，records为空列表的data
-     * @param <T> 数据类型
+     *
+     * @param <T>  数据类型
      * @param code 响应码
-     * @param msg 响应消息
+     * @param msg  响应消息
      * @param data 响应数据
      */
-    public static <T> ResponseEntity<T> of(Integer code, String msg, T... data) {
+    public static <T> ResponseList<T> of(Integer code, String msg, T... data) {
-        return new ResponseEntity<>(code, msg, new QueryPage<>(data));
+        return new ResponseList<>(code, msg, new QueryPage<>(data));
     }
 
-    public static <T> ResponseEntity<T> of(Integer code, String msg, Collection<T> data) {
+    public static <T> ResponseList<T> of(Integer code, String msg, Collection<T> data) {
-        return new ResponseEntity<>(code, msg, new QueryPage<>(data));
+        return new ResponseList<>(code, msg, new QueryPage<>(data));
     }
 
-    public static <T> ResponseEntity<T> of(Integer code, String msg, Page<T> data) {
+    public static <T> ResponseList<T> of(Integer code, String msg, Page<T> data) {
-        return new ResponseEntity<>(code, msg, new QueryPage<>(data));
+        return new ResponseList<>(code, msg, new QueryPage<>(data));
+    }
+
+    /**
+     * 直接构造成功响应体
+     */
+    public static <T> ResponseList<T> ofSuccess(String msg, T... data) {
+        return of(HttpStatus.OK.value(), msg, data);
+    }
+
+    public static <T> ResponseList<T> ofSuccess(String msg, Collection<T> data) {
+        return of(HttpStatus.OK.value(), msg, data);
+    }
+
+    public static <T> ResponseList<T> ofSuccess(String msg, Page<T> data) {
+        return of(HttpStatus.OK.value(), msg, data);
     }
 
     /**
@@ -69,7 +87,7 @@ public class ResponseEntity<T> {
             }
         }
 
-        QueryPage(T[] data) {
+        QueryPage(T... data) {
             //筛掉所有null
             this.records = Arrays.stream(data).filter(Objects::nonNull).collect(Collectors.toList());
             this.total = (long) records.size();

src/main/java/cn/edu/hfut/rmdjzz/projectmanagement/utils/response/ResponseMap.java

@@ -0,0 +1,103 @@
+package cn.edu.hfut.rmdjzz.projectmanagement.utils.response;
+
+import cn.edu.hfut.rmdjzz.projectmanagement.utils.BeanUtils;
+import com.baomidou.mybatisplus.extension.plugins.pagination.Page;
+import lombok.AccessLevel;
+import lombok.AllArgsConstructor;
+import lombok.Data;
+import org.springframework.core.serializer.support.SerializationFailedException;
+import org.springframework.http.HttpStatus;
+
+import java.util.Collection;
+import java.util.HashMap;
+import java.util.Map;
+
+/**
+ * 用于包装响应体，在data中返回一个json，静态调用用of或ofSuccess方法实例化对象，可以用put或putIgnoreNull方法链式构造响应体中的Map
+ *
+ * @author 佘语殊
+ * @since 2022/6/28 21:29
+ */
+@AllArgsConstructor(access = AccessLevel.PRIVATE)
+@Data
+public class ResponseMap {
+    private Integer code;
+    private String msg;
+    private Map<String, Object> data;
+
+    /**
+     * 静态构造方法
+     *
+     * @param code 响应码
+     * @param msg  响应信息
+     * @param data 响应数据，不可以是Collection或Page，否则报错
+     */
+    public static ResponseMap of(Integer code, String msg, Object data) {
+        if (data == null) {
+            return new ResponseMap(code, msg, new HashMap<>());
+        }
+        if (data instanceof Collection<?> || data instanceof Page<?>) {
+            throw new SerializationFailedException("在使用集合类时请使用ResponseList而不是ResponseMap！");
+        }
+        if (data instanceof Map<?, ?> mapData) {
+            return of(code, msg, mapData, true);
+        }
+        return new ResponseMap(code, msg, BeanUtils.beanToMap(data, false));
+    }
+
+    /**
+     * @param putNulls 若为false，则构造map时跳过null值
+     */
+    public static ResponseMap of(Integer code, String msg, Map<?, ?> data, boolean putNulls) {
+        ResponseMap responseMap = new ResponseMap(code, msg, new HashMap<>());
+        if (data == null) {
+            return responseMap;
+        }
+        data.forEach((key, value) -> {
+            if (putNulls || value != null) {
+                responseMap.put(String.valueOf(key), value);
+            }
+        });
+        return responseMap;
+    }
+
+    /**
+     * 空静态构造方法
+     */
+    public static ResponseMap of(Integer code, String msg) {
+        return new ResponseMap(code, msg, new HashMap<>());
+    }
+
+    /**
+     * 直接构建成功响应体
+     */
+    public static ResponseMap ofSuccess(String msg, Object data) {
+        return of(HttpStatus.OK.value(), msg, data);
+    }
+
+    public static ResponseMap ofSuccess(String msg, Map<?, ?> data, boolean putNulls) {
+        return of(HttpStatus.OK.value(), msg, data, putNulls);
+    }
+
+    public static ResponseMap ofSuccess(String msg) {
+        return of(HttpStatus.OK.value(), msg);
+    }
+
+    /**
+     * 可以链式构造包装类里的Map
+     */
+    public ResponseMap put(String key, Object value) {
+        data.put(key, value);
+        return this;
+    }
+
+    /**
+     * 当value为null时，不put到map中
+     */
+    public ResponseMap putIgnoreNull(String key, Object value) {
+        if (value != null) {
+            data.put(key, value);
+        }
+        return this;
+    }
+}

src/test/java/cn/edu/hfut/rmdjzz/projectmanagement/MybatisPlusTests.java

@@ -1,6 +1,9 @@
 package cn.edu.hfut.rmdjzz.projectmanagement;
 
-import cn.edu.hfut.rmdjzz.projectmanagement.service.impl.StaffServiceImpl;
+import cn.edu.hfut.rmdjzz.projectmanagement.entity.Staff;
+import cn.edu.hfut.rmdjzz.projectmanagement.service.IStaffService;
+import cn.edu.hfut.rmdjzz.projectmanagement.utils.response.ResponseMap;
+import com.baomidou.mybatisplus.core.toolkit.Wrappers;
 import com.fasterxml.jackson.databind.ObjectMapper;
 import lombok.SneakyThrows;
 import org.junit.jupiter.api.Test;
@@ -16,13 +19,17 @@ import javax.annotation.Resource;
 public class MybatisPlusTests {
 
     @Resource
-    StaffServiceImpl staffService;
+    private IStaffService staffService;
     @Resource
     private ObjectMapper objectMapper;
 
     @SneakyThrows
     @Test
     public void test() {
-        System.out.println(objectMapper.writeValueAsString(staffService.list()));
+        System.out.println(objectMapper.writeValueAsString(
+                ResponseMap.ofSuccess("ok",
+                        staffService.getOne(Wrappers.<Staff>query().last("limit 1"))
+                )
+        ));
     }
 }