Springboot+MongoDB例子

一、环境

1、maven 3.3.9

2、eclipse

3、springboot 1.5.6

4、mongo 3.4.6

二、开发

1、新建一个springboot项目，引入1.5.6依赖。

2、项目结构如下

3、在pom中添加以下依赖

        <dependency>
            <groupId>org.springframework.bootgroupId>
            <artifactId>spring-boot-starter-data-mongodbartifactId>
        dependency>

4、修改application.yml配置文件

spring:
  data:
    mongodb:
      uri: mongodb://localhost:27017/boot_mongo
  application:
    name: mongoweb
server:
  port: 8888

5、编写实体类User.java

package com.mongo.mongoweb.model;

import java.io.Serializable;

import org.springframework.data.annotation.Id;

/**
 * user 实体类
 * 
 * 作者： 段浩杰 2017年7月29日
 */
public class User implements Serializable {

    /**
     * 
     */
    private static final long serialVersionUID = 1L;

    // @id这个注解来对应mongo的_id这个字段
    @Id
    private String _id;
    private int id;
    private String name;
    private int age;

    public User(String _id, int id, String name, int age) {
        this._id = _id;
        this.id = id;
        this.name = name;
        this.age = age;
    }

    public User(int id, String name, int age) {
        this.id = id;
        this.name = name;
        this.age = age;
    }

    public int getId() {
        return id;
    }

    public void setId(int id) {
        this.id = id;
    }

    public String get_id() {
        return _id;
    }

    public void set_id(String _id) {
        this._id = _id;
    }

    public String getName() {
        return name;
    }

    public void setName(String name) {
        this.name = name;
    }

    public User() {
        super();
    }

    public int getAge() {
        return age;
    }

    public void setAge(int age) {
        this.age = age;
    }

    public String toString() {
        return "User [_id=" + _id + ", id=" + id + ", name=" + name + ", age=" + age + "]";
    }

}

6、编写UserDao

package com.mongo.mongoweb.dao;

import java.util.List;

import org.springframework.data.domain.Pageable;

import com.mongo.mongoweb.model.User;

/**
 * userDao接口定义
 * 
 * 作者： 段浩杰 2017年7月30日
 */
public interface UserDao {

    List findAll();

    User getUser(Integer id);

    void update(User user);

    void insert(User user);

    void insertAll(List users);

    void remove(Integer id);

    List findByPage(User user, Pageable pageable);

}

7、编写UserDaoImpl

package com.mongo.mongoweb.daoimpl;

import java.util.List;

import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.data.domain.Pageable;
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.Repository;

import com.mongo.mongoweb.dao.UserDao;
import com.mongo.mongoweb.model.User;

/**
 * 接口实现
 * 
 * 作者： 段浩杰 2017年7月30日
 */
@Repository("userDao")
public class UserDaoImpl implements UserDao {

    /**
     * 由springboot自动注入，默认配置会产生mongoTemplate这个bean
     */
    @Autowired
    private MongoTemplate mongoTemplate;

    /**
     * 查找全部
     */
    @Override
    public List findAll() {
        return mongoTemplate.findAll(User.class);
    }

    /**
     * 根据id得到对象
     */
    @Override
    public User getUser(Integer id) {



        return mongoTemplate.findOne(new Query(Criteria.where("id").is(id)), User.class);
    }

    /**
     * 插入一个用户
     */
    @Override
    public void insert(User user) {
        mongoTemplate.insert(user);
    }

    /**
     * 根据id删除一个用户
     */
    @Override
    public void remove(Integer id) {
        Criteria criteria = Criteria.where("id").is(id);  
        Query query = new Query(criteria);
        mongoTemplate.remove(query,User.class);
    }

    /**
     * 分页查找
     * 
     * user代表过滤条件
     * 
     * pageable代表分页bean
     */
    @Override
    public List findByPage(User user, Pageable pageable) {
        Query query = new Query();
        if (user != null && user.getName() != null) {
            //模糊查询
            query = new Query(Criteria.where("name").regex("^" + user.getName()));
        }
        List list = mongoTemplate.find(query.with(pageable), User.class);
        return list;
    }

    /**
     * 根据id更新
     */
    @Override
    public void update(User user) {
        Criteria criteria = Criteria.where("id").is(user.getId());
        Query query = new Query(criteria);
        Update update = Update.update("name", user.getName()).set("age", user.getAge());
        mongoTemplate.updateMulti(query, update, User.class);
    }

    /**
     * 插入一个集合
     */
    @Override
    public void insertAll(List users) {
        mongoTemplate.insertAll(users);
    }

}

8、编写UserService

package com.mongo.mongoweb.service;

import java.util.List;

import org.springframework.data.domain.Pageable;

import com.mongo.mongoweb.model.User;

public interface UserService {

    List findAll();

    User getUser(Integer id);

    void update(User user);

    void insert(User user);

    void insertAll(List users);

    void remove(Integer id);

    List findByPage(User user,Pageable pageable);
}

9、编写UserServiceImpl

package com.mongo.mongoweb.serviceimpl;


import java.util.List;

import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.data.domain.Pageable;
import org.springframework.stereotype.Service;

import com.mongo.mongoweb.dao.UserDao;
import com.mongo.mongoweb.model.User;
import com.mongo.mongoweb.service.UserService;

@Service("userService")
public class UserServiceImpl implements UserService{

    @Autowired
    private UserDao userDao;

    @Override
    public List findAll() {
        return userDao.findAll();
    }

    @Override
    public User getUser(Integer id) {
        return userDao.getUser(id);
    }

    @Override
    public void update(User user) {
        userDao.update(user);
    }

    @Override
    public void insert(User user) {
        userDao.insert(user);
    }

    @Override
    public void insertAll(List users) {
        userDao.insertAll(users);
    }

    @Override
    public void remove(Integer id) {
        userDao.remove(id);
    }

    @Override
    public List findByPage(User user, Pageable pageable) {
        return userDao.findByPage(user, pageable);
    }


}

10、编写UserController控制器

package com.mongo.mongoweb.controller;

import java.util.ArrayList;
import java.util.List;

import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.data.domain.PageRequest;
import org.springframework.data.domain.Pageable;
import org.springframework.web.bind.annotation.PathVariable;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RestController;

import com.mongo.mongoweb.model.User;
import com.mongo.mongoweb.service.UserService;

/**
 * user控制器
 * 
 * 作者： 段浩杰 2017年7月30日
 */
@RestController
@RequestMapping("/user")
public class UserController {

    @Autowired
    private UserService userService;

    @RequestMapping("/get/{id}")
    public User getUser(@PathVariable int id) {
        return userService.getUser(id);
    }

    @RequestMapping("/delete/{id}")
    public String delete(@PathVariable int id) {
        userService.remove(id);
        return "delete sucess";
    }

    @RequestMapping("/add")
    public String insert() {
        User user =new User(16, ""+16, 16);
        userService.insert(user);
        return "sucess";
    }

    @RequestMapping("/insert")
    public String insertAll() {
        List list = new ArrayList<>();
        for (int i = 10; i < 15; i++) {
            list.add(new User(i, "" + i, i));
        }
        userService.insertAll(list);
        return "sucess";
    }

    @RequestMapping("/find/all")
    public List find(){
        return userService.findAll();
    }

    @RequestMapping("/find/{start}")
    public List findByPage(@PathVariable int start,User user){
        Pageable pageable=new PageRequest(start, 2);
        return userService.findByPage(user, pageable);
    } 

    @RequestMapping("/update/{id}")
    public String update(@PathVariable int id){
        User user =new User(id, ""+1, 1);
        userService.update(user);
        return "sucess";
    }
}

11、然后启动运行即可 ，源码地址：

https://git.oschina.net/lgr123/springbootMongoDB.git