SpringBoot整合MongoDB详解

SpringBoot——整合MongoDB详解

注意： MongoDB默认是本机访问需要开启远程访问
window修改如下
在这里插入图片描述
linux 修改如下
/usr/local/mongodb4/mongodb.conf 详细内容

dbpath=/data/mongodb4/mongo #数据文件保存地址
logpath=/data/mongodb4/log/mongod.log  #日志保存地址
port=27017  #端口
fork=true #是否后台启动
auth=true #是否开启权限，访问需要用户名和密码
bind_ip=0.0.0.0  #任意ip都能访问
logappend=true

引入依赖

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

配置文件

spring:data:mongodb:host: 127.0.0.1database: testport: 27017# 也可以使用uri   mongodb://127.0.0.1:27017/test

创建实体类

@Data
public class Student {@Idprivate String studentId;private String studentName;private Integer studentAge;private Double studentScore;private Date studentBirthday;public Student(String studentId, String studentName, Integer studentAge, Double studentScore, Date studentBirthday) {this.studentId = studentId;this.studentName = studentName;this.studentAge = studentAge;this.studentScore = studentScore;this.studentBirthday = studentBirthday;}public Student() {}}

dao层

1、JPA方式

/*** JPA方式* 继承MongoRepository即可，不需要实现类*/
public interface StudentRepository extends MongoRepository<Student, String> {
}

StudentController

@RestController
public class StudentController {@Autowiredprivate StudentRepository studentRepository;/*** 插入单条数据*/@GetMapping("/insertOne")public void insertOne() {Student student = new Student("009", "tom", 18, 88.2d, new Date());studentRepository.insert(student);}/*** 插入多条数据*/@GetMapping("/insertMany")public void insertMany() {Student student1 = new Student("002", "jerry", 19, 38.2d, new Date());Student student2 = new Student("003", "mike", 20, 78.2d, new Date());List<Student> list = new ArrayList<>();list.add(student1);list.add(student2);studentRepository.insert(list);}/*** 修改数据*/@GetMapping("/update")public void update() {Optional<Student> op = studentRepository.findById("002");Student student = op.get();student.setStudentAge(222);studentRepository.save(student);}/*** 查询数据*/@GetMapping("/query")public void query() {//根据Id查询单个对象Optional<Student> stuOp = studentRepository.findById("002");System.out.println(stuOp.get());//根据字段查询单个对象Student student = new Student();student.setStudentAge(19);Optional<Student> stuOp1 = studentRepository.findOne(Example.of(student));System.out.println(stuOp1.get());//根据id列表查询多个对象Iterable<Student> itStu = studentRepository.findAllById(Arrays.asList(new String[]{"002", "003"}));Iterator<Student> itor = itStu.iterator();while (itor.hasNext()){System.out.println(itor.next());}//查询所有List<Student> all = studentRepository.findAll();//查询所有并排序List<Student> all1 = studentRepository.findAll(Sort.by(Sort.Order.desc("studentId"), Sort.Order.asc("studentName")));for (Student stu : all1){System.out.println(stu);}//根据条件查询所有并排序Student student1 = new Student();student1.setStudentName("tom");List<Student> all2 = studentRepository.findAll(Example.of(student1), Sort.by(Sort.Order.desc("studentId"), Sort.Order.asc("studentName")));for (Student stu : all2){System.out.println(stu);}//根据条件查询所有并排序，且分页Pageable pageable = PageRequest.of(0, 2);Page<Student> all3 = studentRepository.findAll(pageable);List<Student> content = all3.getContent();for (Student stu : content){System.out.println(stu);}}/*** 其他操作*/@GetMapping("/other")public void other() {//countlong count = studentRepository.count();System.out.println(count);Student student = new Student();student.setStudentAge(18);long count1 = studentRepository.count(Example.of(student));System.out.println(count1);//existsboolean exists = studentRepository.exists(Example.of(student));System.out.println(exists);boolean b = studentRepository.existsById("001");System.out.println(b);}/*** 删除操作*/@GetMapping("/remove")public void remove() {//根据id删除单个对象studentRepository.deleteById("002");//根据字段删除Student student = new Student();student.setStudentAge(20);studentRepository.delete(student);//删除所有studentRepository.deleteAll();//根据字段删除多个Student student1 = new Student();student1.setStudentName("jerry");List<Student> list = new ArrayList<>();list.add(student);list.add(student1);studentRepository.deleteAll(list);}
}

2、MongoTemplate方式

dao接口：

public interface StudentDao {//插入单个对象void addOne(Student student);//根据id删除单个对象void deleteOneById(String  studentId);//修改单个对象void updateOne(Student student);//根据id获取单个对象Student findOneById(String studentId);//获取全部学生List<Student> findAll();
}

实现类：

public class StudentDaoImpl implements StudentDao {@Autowiredprivate MongoTemplate mongoTemplate;@Overridepublic void addOne(Student student) {mongoTemplate.save(student);}@Overridepublic void deleteOneById(String studentId) {Student stu = mongoTemplate.findById(studentId, Student.class);if (stu != null)mongoTemplate.remove(stu);}@Overridepublic void updateOne(Student student) {mongoTemplate.save(student);}@Overridepublic Student findOneById(String studentId) {return mongoTemplate.findById(studentId, Student.class);}@Overridepublic List<Student> findAll() {return mongoTemplate.findAll(Student.class);}
}

测试类

@SpringBootTest
public class StudentDaoTest {@Autowiredprivate StudentDao studentDao;@Testvoid addOneStudent(){
//        插入10行for (Integer count = 0; count < 10; count++) {Student student = new Student();student.setStudentId("study_"+count);student.setStudentName("Echo"+count);student.setStudentAge(count);student.setStudentScore(98.5-count);student.setStudentBirthday(new Date());studentDao.addOne(student);}}@Testvoid deleteOneStudentByStudentId(){
//        删除id为study_0的学生studentDao.deleteOneById("study_0");}@Testvoid updateOneStudent(){
//        修改id为study_1的Student年龄为21Student student = studentDao.findOneById("study_1");student.setStudentAge(21);studentDao.updateOne(student);}@Testvoid getOneStudentByStudentId(){System.out.println(studentDao.findOneById("study_1"));}@Testvoid getAllStudent(){List<Student> studentList = studentDao.findAll();studentList.forEach(System.out::println);}
}

MongoTemplate

is查询：

Query query = new Query();
// where...is... 相当于 where ? = ?
query.addCriteria(Criteria.where("数据库字段名").is("你的参数"));
// findOne 返回的是一个对象 Class代表你的表对应的映射类
mongoTemplate.findOne(query, Class.class);
// find 返回的是数组
mongoTemplate.find(query, Class.class);

in查询：

ArrayList<String> list = new ArrayList<>();
// list代表你的数据
Query query = Query.query(Criteria.where("数据库字段").in(list));
mongoTemplate.find(query, Class.class);// 如果想要查询指定的数据是否在数据库的数组中，可以用以下方法
Query query = Query.query(Criteria.where("数据库字段（数组）").is("你的数组"));

字符模糊查询：

Query query = Query.query(Criteria.where("name").regex("小"));

指定字段不返回：

query.fields().exclude("field");

数组中添加或删除一条数据:

Query query = Query.query(Criteria.where("_id").is("id"));
Update update = new Update();
// push方法可以在数组中添加一条数据
// pull方法可以在数组中删除一条数据
// update.pull()
update.push("字段名称", "data");
mongoTemplate.updateFirst(query, update, Class.class);

批量添加：

ArrayList<Class> list = new ArrayList<>();
mongoTemplate.insert(list, Class.class);

数组查询：

数组格式：
{name:"小明",age:13,friends:[{name:"小王",age:12},{name:"小李",age:18}]
}当要查询朋友中姓名为小王时
Query query = new Query();
query.addCriteria(Criteria.where("friends.$.name").is("小王"));
mongoTemplate.find(query, User.class);同样更新时也是一样，但是注意，更新时查询条件需要添加
query.addCriteria(Criteria.where("friends").elemMatch(Criteria.where("name").is("小王"));
Update update = Update.update("friends.$.friends", "小赵");

数字字符串排序操作

对数据库中数字字符串排序：
加上这一行就行了 亲身体验
query.collation(Collation.of("zh").numericOrdering(true));
还有根据字符串排序时又是顺序并不是我们所想的字典序,加上下面这个也ok
query.collation(Collation.of("zh"));

分页

//分页
query.limit(10);
//排序
Sort sort=Sort.by(Sort.Direction.DESC,"timestamp");
query.with(sort);

criteria:

在这里插入图片描述

2、更新

User user = new User();
user.setId("5d1312aeb1829c279c6c256b");
user.setName("admin");
user.setAddress("测试");Query query = Query.query(Criteria.where("_id").is("5d1312aeb1829c279c6c256b"));
Update update = Update.update("name","zs");
//  更新一条数据
mongoTemplate.updateFirst(query,update, User.class);
mongoTemplate.updateFirst(query,update, "mongodb_user");
mongoTemplate.updateFirst(query,update, User.class,"mongodb_user");
//  更新多条数据
mongoTemplate.updateMulti(query,update, User.class);
mongoTemplate.updateMulti(query,update,"mongodb_user");
mongoTemplate.updateMulti(query,update, User.class,"mongodb_user");
//  更新数据，如果数据不存在就新增
mongoTemplate.upsert(query,update, User.class);
mongoTemplate.upsert(query,update,"mongodb_user");
mongoTemplate.upsert(query,update, User.class,"mongodb_user");

3、插入

List<User> list = new ArrayList<>();
User user= new User();//
user.setName("admin");
user.setAddress("测试");
list.add(user);//  保存对象到mongodb
mongoTemplate.save(user);
mongoTemplate.insert(user);
//  根据集合名称保存对象到mongodb
mongoTemplate.save(user,"mongodb_user");
mongoTemplate.insert(user,"mongodb_user");
//  根据集合名称保存list到mongodb
mongoTemplate.save(list,"mongodb_user");
mongoTemplate.insert(list,"mongodb_user");
mongoTemplate.insert(list,User.class);

删除

List<MongoDbJavaTest> list = new ArrayList<>();
User user= new User();
user.setId("5d1312aeb1829c279c6c256b");
list.add(user);Query query = Query.query(Criteria.where("_id").in("5d1312aeb1829c279c6c256b","5d13133ab1829c29d02ce29c"));
//  根据条件删除
mongoTemplate.remove(query);
mongoTemplate.remove(user);
mongoTemplate.remove(User.class);
//  根据条件删除（可删除多条）
mongoTemplate.remove(query,User.class,"mongodb_user");