tlias管理系统--事务管理-事务进阶-rollbackFor属性

tlias-web-management/src/main/java/com/inmind/controller/DeptController.java

@@ -36,7 +36,7 @@ public class DeptController {
     }
 
     @DeleteMapping("/{id}")
-    public Result delete(@PathVariable Integer id){
+    public Result delete(@PathVariable Integer id) throws Exception {
         log.info("删除部门：{}",id);
         deptService.delete(id);
         return Result.success();

tlias-web-management/src/main/java/com/inmind/mapper/EmpMapper.java

@@ -65,4 +65,11 @@ public interface EmpMapper {
 
     @Select("select * from emp where username = #{username} and password =  #{password} ")
     Emp getEmpByUserNameAndPassword(Emp emp);
+
+    /**
+     * 根据部门id删除员工
+     * @param deptId
+     */
+    @Delete("delete from emp where dept_id = #{deptId}")
+    void deleteByDeptId(Integer deptId);
 }

tlias-web-management/src/main/java/com/inmind/service/DeptService.java

@@ -14,7 +14,7 @@ public interface DeptService {
      * 根据id删除部门
      * @param id
      */
-    void delete(Integer id);
+    void delete(Integer id) throws Exception;
 
     /**
      * 新增部门

tlias-web-management/src/main/java/com/inmind/service/impl/DeptServiceImpl.java

@@ -1,11 +1,13 @@
 package com.inmind.service.impl;
 
 import com.inmind.mapper.DeptMapper;
+import com.inmind.mapper.EmpMapper;
 import com.inmind.pojo.Dept;
 import com.inmind.service.DeptService;
 import org.springframework.beans.factory.annotation.Autowired;
 import org.springframework.stereotype.Component;
 import org.springframework.stereotype.Service;
+import org.springframework.transaction.annotation.Transactional;
 
 import java.time.LocalDateTime;
 import java.util.List;
@@ -15,6 +17,10 @@ public class DeptServiceImpl implements DeptService {
 
     @Autowired//从spring容器中获取DeptMapper类的实现类对象，进行自动注入(DI)
     private DeptMapper deptMapper;
+
+    @Autowired
+    private EmpMapper empMapper;
+
     /**
      * 查询所有部门信息
      * @return
@@ -30,9 +36,20 @@ public class DeptServiceImpl implements DeptService {
      * 根据id删除部门
      * @param id
      */
+    @Transactional(rollbackFor = Exception.class)//将当前的删除功能交给事务管理，达到全成功或全失败的业务功能
     @Override
-    public void delete(Integer id) {
+    public void delete(Integer id) throws Exception {
         deptMapper.delete(id);
+
+        //todo 可能存在大量的业务处理代码，而代码可能会出现业务异常
+//        int a = 1/0;
+
+        if (true) {
+            throw new Exception();//模拟抛出一个编译时异常
+        }
+
+        //当删除部门时，也要把相关的员工删除掉
+        empMapper.deleteByDeptId(id);
     }
 
     @Override