src/main/java/com/campus/water/controller/web/TerminalController.java

@@ -1,8 +1,10 @@
 // java/com/campus/water/controller/web/TerminalController.java
 package com.campus.water.controller.web;
 
+import com.campus.water.service.DeviceService;
 import com.campus.water.service.TerminalService;
 import com.campus.water.entity.vo.TerminalManageVO;
+import com.campus.water.util.ResultVO;
 import io.swagger.v3.oas.annotations.Operation;
 import io.swagger.v3.oas.annotations.tags.Tag;
 import jakarta.validation.Valid;
@@ -23,6 +25,8 @@ import java.util.Map;
 public class TerminalController {
 
     private final TerminalService terminalService;
+    // 步骤1：添加DeviceService的final成员变量，由Spring自动注入（依赖@RequiredArgsConstructor）
+    private final DeviceService deviceService;
 
     @PostMapping("/add")
     @PreAuthorize("hasAnyRole('SUPER_ADMIN', 'AREA_ADMIN')")
@@ -101,4 +105,16 @@ public class TerminalController {
             return new ResponseEntity<>(errorMap, HttpStatus.BAD_REQUEST);
         }
     }
+
+    @DeleteMapping("/unbind/{terminalId}")
+    @PreAuthorize("hasAnyRole('SUPER_ADMIN', 'AREA_ADMIN')")
+    public ResultVO<Void> unbindTerminal(@PathVariable String terminalId) {
+        try {
+            deviceService.unbindTerminal(terminalId);
+            return ResultVO.success(null, "终端与设备解除绑定成功");
+        } catch (Exception e) {
+            return ResultVO.error("解除绑定失败: " + e.getMessage());
+        }
+    }
+
 }

src/main/java/com/campus/water/service/DeviceService.java

@@ -9,6 +9,7 @@ import com.campus.water.mapper.DeviceRepository;
 import com.campus.water.mapper.DeviceTerminalMappingRepository;
 import com.campus.water.util.ResultVO;
 import lombok.RequiredArgsConstructor;
+import org.springframework.beans.factory.annotation.Autowired;
 import org.springframework.stereotype.Service;
 import org.springframework.transaction.annotation.Transactional;
 
@@ -26,7 +27,11 @@ import java.util.stream.Collectors;
 public class DeviceService {
 
     private final DeviceRepository deviceRepository;
+
+    @Autowired
     private final DeviceTerminalMappingRepository terminalMappingRepository;
+    // 1. 注入 Repository 实例（非静态成员，由 Spring 容器自动赋值）
+
 
     /**
      * 根据设备ID查询设备详情
@@ -221,4 +226,22 @@ public class DeviceService {
         }
         return deviceRepository.findById(supplier.getParentMakerId()).orElse(null);
     }
-}
+
+
+
+    // 2. 改为非静态方法（消除静态上下文），这是 Spring 业务方法的标准写法
+    @Transactional
+    public void unbindTerminal(String terminalId) {
+        // 3. 通过注入的实例调用非静态方法 findByTerminalId，无编译错误，且能正常执行数据库操作
+        Optional<DeviceTerminalMapping> mapping = terminalMappingRepository.findByTerminalId(terminalId);
+
+        // 后续业务逻辑：存在则删除映射（可直接调用你接口中新增的 deleteByTerminalId 方法，更高效）
+        if (mapping.isPresent()) {
+            // 调用你定义的 deleteByTerminalId，批量清理该终端的所有映射
+            terminalMappingRepository.deleteByTerminalId(terminalId);
+        } else {
+            throw new RuntimeException("终端未绑定设备，无需解除关联");
+        }
+    }
+}
+