MongoDB（MongoTemplate和MongoRepository）对比

Myth丶恋晨 2023-10-13 19:06 47阅读 0赞

### 目录 ###

*  MongoTemplate
 *  MongoRepository

# MongoTemplate #

//条件查询
        @GetMapping("findUser")
        public void findUserList() {
        
            Query query = new Query(
                    Criteria.where("name").is("zhang3")
                            .and("age").is(33)
            );
            List<User> users = mongoTemplate.find(query, User.class);
            users.forEach(System.out::println);
        }
    
        //条件模糊查询
        @GetMapping("findUserLike")
        public void findUserLike() {
        
            String name = "ang";
            String regex = String.format("%s%s%s", "^.*", name, ".*$");
            Pattern pattern = Pattern.compile(regex,Pattern.CASE_INSENSITIVE);
            Query query = new Query(
                    Criteria.where("name").regex(pattern)
            );
            List<User> users = mongoTemplate.find(query, User.class);
            users.forEach(System.out::println);
        }
    
    
        //条件模糊分页查询
        @GetMapping("findUserPage")
        public void findUserPage() {
        
            //0定义分页参数
            int pageNo = 1;
            int pageSize = 10;
            //1设置筛选条件
            String name = "ang";
            String regex = String.format("%s%s%s", "^.*", name, ".*$");
            Pattern pattern = Pattern.compile(regex,Pattern.CASE_INSENSITIVE);
            Query query = new Query(
                    Criteria.where("name").regex(pattern)
            );
            //2查询总记录数total
            long total = mongoTemplate.count(query, User.class);
            //3设置分页条件
            query.skip((pageNo-1)*pageSize).limit(pageSize);
            List<User> users = mongoTemplate.find(query, User.class);
            System.out.println("total = " + total);
            users.forEach(System.out::println);
        }
    
        //修改
        @GetMapping("update")
        public void updateUser() {
            User user = mongoTemplate.findById("5ffbfa2ac290f356edf9b5aa", User.class);
            user.setName("test_1");
            user.setAge(25);
            user.setEmail("493220990@qq.com");
            Query query = new Query(Criteria.where("_id").is(user.getId()));
            Update update = new Update();
            update.set("name", user.getName());
            update.set("age", user.getAge());
            update.set("email", user.getEmail());
            UpdateResult result = mongoTemplate.upsert(query, update, User.class);
            long count = result.getModifiedCount();
            System.out.println(count);
        }

# MongoRepository #

@GetMapping("create")
        public void createUser() {
        
            User user = new User();
            user.setAge(20);
            user.setName("张三");
            user.setEmail("3332200@qq.com");
            User user1 = userRepository.save(user);
            System.out.println("user1 = " + user1);
        }
    
        //查询所有
        @GetMapping("findAll")
        public void findUser() {
        
            List<User> users = userRepository.findAll();
            users.forEach(System.out::println);
        }
    
    
        //根据id查询
        @GetMapping("findId")
        public void getById() {
        
            User user = userRepository.findById("64b4a856a2225f220ec3fa0f").get();
            System.out.println("user = " + user);
        }
    
        //条件查询
        @GetMapping("findUser")
        public void findUserList() {
        
            User user = new User();
            user.setName("张三");
            user.setAge(20);
            Example<User> example = Example.of(user);
            List<User> users = userRepository.findAll(example);
            users.forEach(System.out::println);
        }
    
        //条件模糊查询
        @GetMapping("findUserLike")
        public void findUserLike() {
        
            //查询条件
            User user = new User();
            user.setName("三");
            //模板构造器
            ExampleMatcher matcher = ExampleMatcher.matching()
                    .withStringMatcher(ExampleMatcher.StringMatcher.CONTAINING)
                    .withIgnoreCase(true);
            //查询条件模板
            Example<User> example = Example.of(user,matcher);
            List<User> users = userRepository.findAll(example);
            users.forEach(System.out::println);
        }
    
        //条件模糊分页查询
        @GetMapping("findUserPage")
        public void findUserPage() {
        
            //创建排序对象
            Sort sort = Sort.by(Sort.Direction.DESC,"age");
            //创建分页对象  第一页从0开始
            Pageable pageable = PageRequest.of(0,2,sort);
            //查询条件
            User user = new User();
            user.setName("三");
            //模板构造器
            ExampleMatcher matcher = ExampleMatcher.matching()
                    .withStringMatcher(ExampleMatcher.StringMatcher.CONTAINING)
                    .withIgnoreCase(true);
            //查询条件模板
            Example<User> example = Example.of(user,matcher);
            Page<User> userPage = userRepository.findAll(example, pageable);
            userPage.getContent().forEach(System.out::println);
            System.out.println("userPage.getTotalElements() = " + userPage.getTotalElements());
        }
    
        //修改
        @GetMapping("update")
        public void updateUser() {
        
            User user = userRepository.findById("60b8d57ed539ed5b124942de").get();
            user.setName("张三_1");
            user.setAge(25);
            user.setEmail("883220990@qq.com");
            User save = userRepository.save(user);
            System.out.println(save);
        }
    
        //删除操作
        @GetMapping("delete")
        public void delete() {
        
            userRepository.deleteById("60b8d57ed539ed5b124942de");
        }
    
    
        @GetMapping("testMethod1")
        public void testMethod1() {
        
            List<User> users = userRepository.getByNameAndAge("张三",20);
            users.forEach(System.out::println);
        }
    
        @GetMapping("testMethod2")
        public void testMethod2() {
        
            List<User> users = userRepository.getByNameLike("三");
            users.forEach(System.out::println);