引入依赖
<dependency> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter-data-mongodb</artifactId> </dependency>
在application.properties文件添加配置
spring.data.mongodb.uri=mongodb://localhost:27017/test
MongoTemplate
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id为id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”)
5、Query.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.with(new Sort(Sort.Direction.ASC, "age"). and(new
Sort(Sort.Direction.DESC, "date")))
添加User类
@Data @Document("User")// 对应表和集合 public class User { @Id private String id; private String name; private Integer age; private String email; private String createDate; }
//添加 @Test public void createUser() { User user = new User(); user.setAge(20); user.setName("test"); user.setEmail("4932200@qq.com"); User user1 = mongoTemplate.insert(user); System.out.println(user1); }
//查询所有 @Test public void findUser() { List<User> userList = mongoTemplate.findAll(User.class); System.out.println(userList); }
//根据id查询 @Test public void getById() { User user = mongoTemplate.findById("5ffbfa2ac290f356edf9b5aa", User.class); System.out.println(user); }
//条件查询 @Test 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 @Test public void findUsersLikeName() { String name = "est"; String regex = String.format("%s%s%s", "^.*", name, ".*$"); Pattern pattern = Pattern.compile(regex, Pattern.CASE_INSENSITIVE); Query query = new Query(Criteria.where("name").regex(pattern)); List<User> userList = mongoTemplate.find(query, User.class); System.out.println(userList); }
//分页查询 @Test public void findUsersPage() { String name = "est"; int pageNo = 1; int pageSize = 10; Query query = new Query(); String regex = String.format("%s%s%s", "^.*", name, ".*$"); 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 @Test 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); }
//删除操作 @Test 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); }
MongoRepository
添加Repository类
@Repository public interface UserRepository extends MongoRepository<User, String> { }
//添加 @Test public void createUser() { User user = new User(); user.setAge(20); user.setName("张三"); user.setEmail("3332200@qq.com"); User user1 = userRepository.save(user); }
//查询所有 @Test public void findUser() { List<User> userList = userRepository.findAll(); System.out.println(userList); }
//id查询 @Test public void getById() { User user = userRepository.findById("5ffbfe8197f24a07007bd6ce").get(); System.out.println(user); }
//条件查询 @Test 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 @Test 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 @Test 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 @Test public void updateUser() { User user = userRepository.findById("5ffbfe8197f24a07007bd6ce").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 @Test public void delete() { userRepository.deleteById("5ffbfe8197f24a07007bd6ce"); }