java使用mangodb进行数据存储的简单操作

关于使用mangodb进行数据存储的简单操作

1. 引入maven依赖

   <dependency>
               <groupId>org.springframework.boot</groupId>
               <artifactId>spring-boot-starter-data-mongodb</artifactId>
   </dependency>
   

2. 具体代码

   实体对象如下：

   @Data
   public class User {
       private int id;
       private String name;
       private String password;
   }
   

   dao层代码示例：

   import org.springframework.data.mongodb.repository.MongoRepository;
   import org.springframework.data.mongodb.repository.Query;
   import java.util.List;
   public interface UserRepository extends MongoRepository<User, Integer> {
       //查詢操作，自定义实现
       @Query("{'name':?0}")
       User getByName(String name);
       List<User> getByNameLike(String name);
   }
   

   service实现层：

   import org.springframework.beans.factory.annotation.Autowired;
   import org.springframework.data.mongodb.core.MongoTemplate;
   import org.springframework.data.mongodb.core.query.Criteria;
   import org.springframework.data.mongodb.core.query.Query;
   import org.springframework.data.mongodb.core.query.Update;
   import org.springframework.stereotype.Service;
   public class UserServiceImpl implements UserService {
       @Autowired
       private MongoTemplate mongoTemplate;
       @Autowired
       private UserRepository userRepository;
       @Override
       public void saveUser(User user) {
           userRepository.save(user);
       }
       @Override
       public void removeUserByName(String name) {
           Query query = new Query(new Criteria("name").is(name));
           mongoTemplate.remove(query, User.class);
       }
       @Override
       public void updateUser(User user) {
           Query query = new Query(new Criteria("id").is(user.getId()));
           Update update = new Update().set("name", user.getName());
           mongoTemplate.updateMulti(query, update, User.class);
       }
       @Override
       public User getByName(String name) {
           return userRepository.getByName(name);
       }
       @Override
       public User getByNameLike(String name) {
           return userRepository.getByNameLike(name).get(0);
       }
   }
   

   controller调用层：

   @RestController
   @RequestMapping("/mongodb")
   @Api(tags = "mongodb_test")
   public class UserController {
   
       @Autowired
       private UserService userService;
   
       @ApiOperation(value = "保存用户", tags = "保存用户")
       @PostMapping("/save")
       public Result saveUser(@RequestBody User user) {
           userService.saveUser(user);
           return Result.OK();
       }
   
       @ApiOperation(value = "删除用户", tags = "删除用户")
       @PostMapping("/remove")
       public Result removeUser(String name) {
           userService.removeUserByName(name);
           return Result.OK();
       }
   
       @ApiOperation(value = "更新用户", tags = "更新用户")
       @PostMapping("/update")
       public Result updateUser(@RequestBody User user) {
           userService.updateUser(user);
           return Result.OK();
       }
   
       @ApiOperation(value = "根据姓名查找用户", tags = "根据姓名查找用户")
       @PostMapping("/getByName")
       public Result getByName(String name) {
           userService.getByName(name);
           return Result.OK();
       }
   
       @ApiOperation(value = "根据姓名模糊查找用户", tags = "根据姓名模糊查找用户")
       @PostMapping("/getByNameLike")
       public Result getByNameLike(String name) {
           userService.getByNameLike(name);
           return Result.OK();
       }
   
   }