SpringBoot整合JPA,CRUD

JPA-SpringBoot/src/main/java/com/jpa/jpaspringboot/controller/UserController.java

@@ -47,6 +47,16 @@ public class UserController {
         }
     }
 
+
+//    @DeleteMapping("{id}")
+//    public ResponseEntity delete(@PathVariable Integer id){
+//        userService.delete(id);
+//        if (id == 0 || id ==null) {
+//            return ResponseEntity.status(400).body(id);
+//        }else {
+//            return ResponseEntity.ok(id);
+//        }
+//    }
     /**
      * 按id删除数据
      * @param user 需要删除的用户信息
@@ -77,6 +87,15 @@ public class UserController {
         }
     }
 
+    @PatchMapping("{id}")
+    public ResponseEntity<User> patch(@RequestBody User user){
+        User result = userService.patch(user);
+        if (result.getId() == null || result.getId() == 0){
+            return ResponseEntity.status(400).body(result);
+        }else {
+            return ResponseEntity.ok(result);
+        }
+    }
 
 
 }

JPA-SpringBoot/src/main/java/com/jpa/jpaspringboot/service/Impl/UserServiceImpl.java

@@ -29,8 +29,13 @@ public class UserServiceImpl implements UserService {
 
     @Override
     public User delete(User user) {
-        userDao.deleteById(user.getId());
-        return user;
+        boolean bool = userDao.existsById(user.getId());
+        if (bool == true) {
+            userDao.deleteById(user.getId());
+            return user;
+        }else {
+            return user;
+        }
     }
 
     @Override
@@ -40,5 +45,22 @@ public class UserServiceImpl implements UserService {
         return user;
     }
 
+    @Override
+    public User patch(User user) {
+        userDao.findById(user.getId());
+        userDao.save(user);
+        return user;
+    }
+
+//    @Override
+//    public void delete(Integer id) {
+//        boolean b = userDao.existsById(id);
+//        if (b == true){
+//            userDao.deleteById(id);
+//        }else {
+//            new RuntimeException("该ID不存在");
+//        }
+//    }
+
 
 }

JPA-SpringBoot/src/main/java/com/jpa/jpaspringboot/service/UserService.java

@@ -12,4 +12,8 @@ public interface UserService {
     User delete(User user);
 
     User update(User user);
+
+    User patch(User user);
+
+//    void delete(Integer id);
 }