SpringBoot---MongoDB

1、概述

　　　　1.1、SpringBoot对MongoDB的支持  ，位于   org.springframework.boot.autoconfigure.mongo；

　　　　　　　　　　主要  配置  数据库连接、MongoTemplate；

　　　　　　　　　　可以使用  “spring.data.mongodb” 为前缀的属性  来  配置MongoDB相关的信息；

　　　　1.2、SpringBoot 为我们提供了一些默认属性，如 ：端口27017、服务器localhost、默认数据库为test...

　　　　1.3、SpringBoot 为我们 开启了对Repository的支持（自动配置了@EnableMongoRepositories）；

2、使用

　　　　1.1、使用MongoDB   只需要引入spring-boot-starter-data-mongodb依赖，无需任何配置；　　

　　　　1.2、案例

package com.an.mongo.entity;

import org.springframework.data.annotation.Id;
import org.springframework.data.mongodb.core.mapping.Document;
import org.springframework.data.mongodb.core.mapping.Field;
import java.util.LinkedList;
import java.util.List;

/**
 * @description:
 * @author: anpeiyong
 * @date: Created in 2019/12/2 18:38
 * @since:
 */
//@Document  映射数据模型  与   MongoDB的文档
@Document
public class Person {

    //@Id   表示这个属性为文档的id
    @Id
    private String id;
    private String name;
    private Integer age;

    //@Field   表示此属性 为文档中的名称  ，loc属性将以数组形式  存在 当前数据记录中
    @Field(value = "loc")
    private List<Location> locationList=new LinkedList<Location>();

    public Person(String id,String name,Integer age){
        this.id=id;
        this.name=name;
        this.age=age;
    }

    public String getId() {
        return id;
    }

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

    public String getName() {
        return name;
    }

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

    public Integer getAge() {
        return age;
    }

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

    public List<Location> getLocationList() {
        return locationList;
    }

    public void setLocationList(List<Location> locationList) {
        this.locationList = locationList;
    }

    @Override
    public String toString() {
        return "id:"+id+"name:"+name+"age:"+age;
    }
}

　　

package com.an.mongo.entity;

/**
 * @description:
 * @author: anpeiyong
 * @date: Created in 2019/12/2 18:44
 * @since:
 */
public class Location {

    private String place;
    private String year;

    public Location(String place,String year){
        this.place=place;
        this.year=year;
    }

    public String getPlace() {
        return place;
    }

    public void setPlace(String place) {
        this.place = place;
    }

    public String getYear() {
        return year;
    }

    public void setYear(String year) {
        this.year = year;
    }

    @Override
    public String toString() {
        return "place:"+place+"year:"+year;
    }
}

　　

package com.an.mongo.controller;

import com.an.mongo.dao.PersonRepository;
import com.an.mongo.entity.Location;
import com.an.mongo.entity.Person;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.web.bind.annotation.PathVariable;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RestController;
import java.util.LinkedList;
import java.util.List;

/**
 * @description:
 * @author: anpeiyong
 * @date: Created in 2019/12/2 19:00
 * @since:
 */
@RestController
public class MongoController {

    @Autowired
    private PersonRepository personRepository;

    @RequestMapping(value = "/save")
    public Person save(){
        Person person=new Person("2","an",18);
        List<Location> locationList=new LinkedList<Location>();
        Location location1=new Location("beijing","1999");
        Location location2=new Location("nanjing","1998");
        Location location3=new Location("hangzhou","1997");
        Location location4=new Location("suzhou","1996");
        Location location5=new Location("shanxi","1995");
        locationList.add(location1);
        locationList.add(location2);
        locationList.add(location3);
        locationList.add(location4);
        locationList.add(location5);
        person.setLocationList(locationList);
        return personRepository.save(person);
    }

    @RequestMapping(value = "/getByName/{name}")
    public Person getByName(@PathVariable(value = "name") String name){
        Person person=personRepository.getByName(name);
        System.out.println(person);
        return person;
    }

    @RequestMapping(value = "/getByAge/{age}")
    public List<Person> getByAge(@PathVariable(value = "age") Integer age){
        List<Person> personList=personRepository.withQueryFindByAge(age);
        System.out.println(personList);
        return personList;
    }
}

　　

package com.an.mongo.dao;

import com.an.mongo.entity.Person;
import org.springframework.data.mongodb.repository.MongoRepository;
import org.springframework.data.mongodb.repository.Query;
import java.util.List;

/**
 * @description:
 * @author: anpeiyong
 * @date: Created in 2019/12/2 18:58
 * @since:
 */
public interface PersonRepository extends MongoRepository<Person,String> {

    Person getByName(String name);

    //@Query  查询参数构造JSON字符串
    @Query(value = "{'age':?0}")
    List<Person> withQueryFindByAge(Integer age);
}