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一、集成简介

spring-data-mongodb提供了MongoTemplate与MongoRepository两种方式访问mongodb,MongoRepository操作简单,MongoTemplate操作灵活,我们在项目中可以灵活适用这两种方式操作mongodb,MongoRepository的缺点是不够灵活,MongoTemplate正好可以弥补不足。

1、在service_hosp
引入依赖
<dependencies>
    <dependency>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-data-mongodb</artifactId>
    </dependency>
</dependencies>

2、添加MongoDB配置

spring.data.mongodb.uri=mongodb://localhost:27017/test

二、基于MongoTemplate 开发CRUD

1、添加实体

添加com.xinzhi.User类

@Data
@Document("User")
public class User {
    @Id
    private String id;
    private String name;
    private Integer age;
    private String email;
    private String createDate;
}

2、常用方法

常用方法
mongoTemplate.findAll(User.class): 查询User文档的全部数据
mongoTemplate.findById(<id>, User.class): 查询User文档idid的数据
mongoTemplate.find(query, User.class);: 根据query内的查询条件查询
mongoTemplate.upsert(query, update, User.class): 修改
mongoTemplate.remove(query, User.class): 删除
mongoTemplate.insert(User): 新增

Query对象
1、创建一个query对象(用来封装所有条件对象),再创建一个criteria对象(用来构建条件)
2 精准条件:criteria.and(key).is(“条件”)
      模糊条件:criteria.and(key).regex(“条件”)
3、封装条件:query.addCriteria(criteria)
4、大于(创建新的criteria):Criteria gt = Criteria.where(key).gt(“条件”)
     小于(创建新的criteria):Criteria lt = Criteria.where(key).lt(“条件”)
5Query.addCriteria(new Criteria().andOperator(gt,lt));
6、一个query中只能有一个andOperator()。其参数也可以是Criteria数组。
7、排序 query.withnew Sort(Sort.Direction.ASC, "age"). and(new Sort(Sort.Direction.DESC, "date")))

3、添加测试类
@RestController
@RequestMapping("/mongo1")
public class TestMongo1 {

    @Autowired
    private MongoTemplate mongoTemplate;

    //添加
    @GetMapping("create")
    public void createUser() {
        User user = new User();
        user.setAge(20);
        user.setName("test");
        user.setEmail("[email protected]");
        User user1 = mongoTemplate.insert(user);
        System.out.println(user1);
    }

    //查询所有
    @GetMapping("findAll")
    public void findUser() {
        List<User> userList = mongoTemplate.findAll(User.class);
        System.out.println(userList);
    }

    //根据id查询
    @GetMapping("findId")
    public void getById() {
        User user =
                mongoTemplate.findById("5ffbfa2ac290f356edf9b5aa", User.class);
        System.out.println(user);
    }

    //条件查询
    @GetMapping("findUser")
    public void findUserList() {
        Query query = new Query(Criteria
                .where("name").is("test")
                .and("age").is(20));
        List<User> userList = mongoTemplate.find(query, User.class);
        System.out.println(userList);
    }

    //模糊查询
    @GetMapping("findLike")
    public void findUsersLikeName() {
        String name = "est";
        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> userList = mongoTemplate.find(query, User.class);
        System.out.println(userList);
    }

    //分页查询
    @GetMapping("findPage")
    public void findUsersPage() {
        String name = "est";
        int pageNo = 1;
        int pageSize = 10;

        Query query = new Query();
        String regex = String.format("%s%s%s", "^.*", name, ".*$");
        Pattern pattern = Pattern.compile(regex, Pattern.CASE_INSENSITIVE);
        query.addCriteria(Criteria.where("name").regex(pattern));
        int totalCount = (int) mongoTemplate.count(query, User.class);
        List<User> userList = mongoTemplate.find(query.skip((pageNo - 1) * pageSize).limit(pageSize), User.class);

        Map<String, Object> pageMap = new HashMap<>();
        pageMap.put("list", userList);
        pageMap.put("totalCount",totalCount);
        System.out.println(pageMap);
    }

    //修改
    @GetMapping("update")
    public void updateUser() {
        User user = mongoTemplate.findById("5ffbfa2ac290f356edf9b5aa", User.class);
        user.setName("test_1");
        user.setAge(25);
        user.setEmail("[email protected]");
        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);
    }

    //删除操作
    @GetMapping("delete")
    public void delete() {
        Query query =
                new Query(Criteria.where("_id").is("5ffbfa2ac290f356edf9b5aa"));
        DeleteResult result = mongoTemplate.remove(query, User.class);
        long count = result.getDeletedCount();
        System.out.println(count);
    }

}

一、基于MongoRepository开发CRUD

Spring Data提供了对mongodb数据访问的支持,我们只需要继承MongoRepository类,按照Spring Data规范就可以了

SpringData  方法定义规范

 

1、不是随便声明的,而需要符合一定的规范
2、 查询方法以find | read | get开头
3、 涉及条件查询时,条件的属性用条件关键字连接
4、 要注意的是:条件属性首字母需要大写
5、 支持属性的级联查询,但若当前类有符合条件的属性则优先使用,而不使用级联属性,若需要使用级联属性,则属性之间使用_强制进行连接
1、添加Repository类
@Repository
public interface UserRepository extends MongoRepository<User, String> {
}

2、编写测试类

@RestController
@RequestMapping("/mongo2")
public class TestMongo2 {

    @Autowired
    private UserRepository userRepository;

    //添加
    @GetMapping("create")
    public void createUser() {
        User user = new User();
        user.setAge(20);
        user.setName("张三");
        user.setEmail("[email protected]");
        User user1 = userRepository.save(user);
    }

    //查询所有
    @GetMapping("findAll")
    public void findUser() {
        List<User> userList = userRepository.findAll();
        System.out.println(userList);
    }

    //id查询
    @GetMapping("findId")
    public void getById() {
        User user = userRepository.findById("60b8d57ed539ed5b124942de").get();
        System.out.println(user);
    }

    //条件查询
    @GetMapping("findQuery")
    public void findUserList() {
        User user = new User();
        user.setName("张三");
        user.setAge(20);
        Example<User> userExample = Example.of(user);
        List<User> userList = userRepository.findAll(userExample);
        System.out.println(userList);
    }

    //模糊查询
    @GetMapping("findLike")
    public void findUsersLikeName() {
        //创建匹配器,即如何使用查询条件
        ExampleMatcher matcher = ExampleMatcher.matching() //构建对象
                .withStringMatcher(ExampleMatcher.StringMatcher.CONTAINING) //改变默认字符串匹配方式:模糊查询
                .withIgnoreCase(true); //改变默认大小写忽略方式:忽略大小写
        User user = new User();
        user.setName("三");
        Example<User> userExample = Example.of(user, matcher);
        List<User> userList = userRepository.findAll(userExample);
        System.out.println(userList);
    }

    //分页查询
    @GetMapping("findPage")
    public void findUsersPage() {
        Sort sort = Sort.by(Sort.Direction.DESC, "age");
//0为第一页
        Pageable pageable = PageRequest.of(0, 10, sort);
//创建匹配器,即如何使用查询条件
        ExampleMatcher matcher = ExampleMatcher.matching() //构建对象
                .withStringMatcher(ExampleMatcher.StringMatcher.CONTAINING) //改变默认字符串匹配方式:模糊查询
                .withIgnoreCase(true); //改变默认大小写忽略方式:忽略大小写
        User user = new User();
        user.setName("三");
        Example<User> userExample = Example.of(user, matcher);
//创建实例
        Example<User> example = Example.of(user, matcher);
        Page<User> pages = userRepository.findAll(example, pageable);
        System.out.println(pages);
    }

    //修改
    @GetMapping("update")
    public void updateUser() {
        User user = userRepository.findById("60b8d57ed539ed5b124942de").get();
        user.setName("张三_1");
        user.setAge(25);
        user.setEmail("[email protected]");
        User save = userRepository.save(user);
        System.out.println(save);
    }

    //删除
    @GetMapping("delete")
    public void delete() {
        userRepository.deleteById("60b8d57ed539ed5b124942de");
    }
}

3、SpringData方法规范

@GetMapping("testMethod2")
public void testMethod2() {
    List<User> users = userRepository.findByNameLike("张");
    System.out.println(users);
}

@GetMapping("testMethod1")
public void testMethod1() {
    List<User> users = userRepository.findByName("张三");
    System.out.println(users);
}

@Repository
public interface UserRepository extends MongoRepository<User, String> {

    List<User> findByName(String name);

    List<User> findByNameLike(String name);
}