重构Article模块 新增Message模块 优化安全配置

src/main/java/com/qf/myafterprojecy/service/MessageService.java

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+package com.qf.myafterprojecy.service;
+
+import com.qf.myafterprojecy.pojo.Message;
+import com.qf.myafterprojecy.pojo.ResponseMessage;
+import com.qf.myafterprojecy.pojo.dto.MessageDto;
+import com.qf.myafterprojecy.repository.MessageRepository;
+import org.springframework.beans.BeanUtils;
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.dao.DataAccessException;
+import org.springframework.stereotype.Service;
+import org.springframework.util.StringUtils;
+
+import static jdk.nashorn.internal.runtime.regexp.joni.Config.log;
+
+@Service
+public class MessageService implements IMessageService {
+    @Autowired
+    private MessageRepository messageRepository;
+
+    @Override
+    public ResponseMessage<Iterable<Message>> getAllMessages() {
+        return ResponseMessage.success(messageRepository.findAll(), "查询成功", true);
+    }
+
+    @Override
+    public ResponseMessage<Message> getMessageById(Integer id) {
+        return ResponseMessage.success(messageRepository.findById(id).orElse(null), "查询成功", true);
+    }
+
+    @Override
+    public ResponseMessage<Message> saveMessage(MessageDto messageDto) {
+        // 参数校验
+        if (messageDto == null) {
+            throw new IllegalArgumentException("MessageDto cannot be null");
+        }
+        // 业务逻辑校验
+        if (StringUtils.isEmpty(messageDto.getContent())) {
+            throw new IllegalArgumentException("Message content cannot be empty");
+        }
+        // 调用Repository保存数据
+        try {
+            Message message = new Message();
+            BeanUtils.copyProperties(messageDto,message);
+            Message savedMessage = messageRepository.save(message);
+            return ResponseMessage.success(savedMessage, "保存成功", true);
+        } catch (DataAccessException e) {
+            return ResponseMessage.failure("Failed to save message");
+        }
+    }
+
+    @Override
+    public ResponseMessage<Message> deleteMessage(Integer id) {
+        if (messageRepository.existsById(id)) {
+            messageRepository.deleteById(id);
+            return ResponseMessage.success(null, "删除成功", true);
+        } else {
+            return ResponseMessage.failure("Message not found");
+        }
+    }
+}