开始前,建议大家去了解以下文章,当然不看也没问题:
JDK1.7、Maven、Eclipse、SpringBoot1.5.2、mongodb3.4,Robomongo(可视化工具)
pom.xml:
<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/maven-v4_0_0.xsd">
<modelVersion>4.0.0</modelVersion>
<groupId>com.itstyle.mongodb</groupId>
<artifactId>spring-boot-mongodb</artifactId>
<packaging>jar</packaging>
<version>0.0.1-SNAPSHOT</version>
<name>spring-boot-mongodb</name>
<url>http://maven.apache.org</url>
<properties>
<project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
<java.version>1.7</java.version>
</properties>
<!-- spring-boot-starter-parent包含了大量配置好的依赖管理,在自己项目添加这些依赖的时候不需要写<version>版本号 -->
<parent>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-parent</artifactId>
<version>1.5.2.RELEASE</version>
<relativePath/>
</parent>
<!-- 配置依赖 -->
<dependencies>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter</artifactId>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-web</artifactId>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-test</artifactId>
<scope>test</scope>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-data-mongodb</artifactId>
</dependency>
</dependencies>
<build>
<plugins>
<!-- 打包项目 mvn clean package -->
<plugin>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-maven-plugin</artifactId>
<dependencies>
<!-- mvn spring-boot:run 热部署启动 -->
<dependency>
<groupId>org.springframework</groupId>
<artifactId>springloaded</artifactId>
<version>1.4.0.RELEASE</version>
</dependency>
</dependencies>
</plugin>
</plugins>
</build>
</project>
实体类 Users.java:
package com.itstyle.mongodb.model;
import java.io.Serializable;
import org.springframework.data.annotation.Transient;
import org.springframework.data.mongodb.core.index.CompoundIndex;
import org.springframework.data.mongodb.core.index.CompoundIndexes;
import org.springframework.data.mongodb.core.index.Indexed;
import org.springframework.data.mongodb.core.mapping.Document;
@Document(collection="users")
@CompoundIndexes({
@CompoundIndex(name = "age_idx", def = "{'name': 1, 'age': -1}")
})
public class Users implements Serializable{
private static final long serialVersionUID = 1L;
@Indexed
private String uid;
private String name;
private int age;
@Transient
private String address;
public Users(String uid, String name, int age) {
super();
this.uid = uid;
this.name = name;
this.age = age;
}
public String getUid() {
return uid;
}
public void setUid(String uid) {
this.uid = uid;
}
public String getName() {
return name;
}
public void setName(String name) {
this.name = name;
}
public int getAge() {
return age;
}
public void setAge(int age) {
this.age = age;
}
public String getAddress() {
return address;
}
public void setAddress(String address) {
this.address = address;
}
@Override
public String toString() {
return String.format(
"Customer[name='%s', age='%s']",
name, age);
}
}
业务接口 IUserService.java:
package com.itstyle.mongodb.service;
import java.util.List;
import com.itstyle.mongodb.model.Users;
/**
* mongodb 案例
* 创建者 小柒
* 创建时间 2017年7月19日
*
*/
public interface IUserService {
public void saveUser(Users users);
public Users findUserByName(String name);
public void removeUser(String name);
public void updateUser(String name, String key, String value);
public List<Users> listUser();
}
业务实现UserServiceImpl.java:
package com.itstyle.mongodb.service.impl;
import java.util.List;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.data.mongodb.core.MongoOperations;
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.Component;
import com.itstyle.mongodb.model.Users;
import com.itstyle.mongodb.service.IUserService;
@Component("userService")
public class UserServiceImpl implements IUserService {
@Autowired
MongoOperations mongoTemplate;
public void saveUser(Users users) {
mongoTemplate.save(users);
}
public Users findUserByName(String name) {
return mongoTemplate.findOne(
new Query(Criteria.where("name").is(name)), Users.class);
}
public void removeUser(String name) {
mongoTemplate.remove(new Query(Criteria.where("name").is(name)),
Users.class);
}
public void updateUser(String name, String key, String value) {
mongoTemplate.updateFirst(new Query(Criteria.where("name").is(name)),
Update.update(key, value), Users.class);
}
public List<Users> listUser() {
return mongoTemplate.findAll(Users.class);
}
}
启动类Application.java:
package com.itstyle.mongodb;
import org.apache.log4j.Logger;
import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.EnableAutoConfiguration;
import org.springframework.context.annotation.ComponentScan;
@EnableAutoConfiguration
@ComponentScan(basePackages={"com.itstyle.mongodb"})
public class Application {
private static final Logger logger = Logger.getLogger(Application.class);
public static void main(String[] args) throws InterruptedException {
SpringApplication.run(Application.class, args);
logger.info("项目启动 ");
}
}
基础配置application.properties:
# 项目contextPath,一般在正式发布版本中
server.context-path=/mongodb
# 服务端口
server.port=8080
# session最大超时时间(分钟),默认为30
server.session-timeout=60
# 该服务绑定IP地址,启动服务器时如本机不是该IP地址则抛出异常启动失败,只有特殊需求的情况下才配置
# server.address=192.168.16.11
# tomcat最大线程数,默认为200
server.tomcat.max-threads=800
# tomcat的URI编码
server.tomcat.uri-encoding=UTF-8
#mongo2.x支持以上两种配置方式 mongo3.x仅支持uri方式
#mongodb note:mongo3.x will not use host and port,only use uri
#spring.data.mongodb.host=192.168.1.180
#spring.data.mongodb.port=27017
#spring.data.mongodb.database=itstyle
#没有设置密码
#spring.data.mongodb.uri=mongodb://192.168.1.180:27017/itstyle
#设置了密码
spring.data.mongodb.uri=mongodb://itstyle:itstyle@192.168.1.180:27017/itstyle
测试类SpringbootMongodbApplication.java:
package com.itstyle.mongodb.test;
import java.util.List;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.boot.CommandLineRunner;
import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
import org.springframework.context.annotation.ComponentScan;
import com.itstyle.mongodb.model.Users;
import com.itstyle.mongodb.service.IUserService;
@SpringBootApplication
@ComponentScan(basePackages={"com.itstyle.mongodb"})
public class SpringbootMongodbApplication implements CommandLineRunner {
@Autowired
private IUserService userService;
public static void main(String[] args) {
SpringApplication.run(SpringbootMongodbApplication.class, args);
}
@Override
public void run(String... args) throws Exception {
try {
Users users = new Users("1", "小明", 10);
users.setAddress("青岛市");
userService.saveUser(users);
List<Users> list = userService.listUser();
System.out.println("一共这么多人:"+list.size());
} catch (Exception e) {
e.printStackTrace();
}
}
}
最后,运行测试类,使用可视化工具Robomongo查看:
标注在实体类上,与hibernate异曲同工。
@Document(collection="users")
public class Users implements Serializable{
private static final long serialVersionUID = 1L;
...省略代码
###@CompoundIndex
复合索引,加复合索引后通过复合索引字段查询将大大提高速度。
@Document(collection="users")
@CompoundIndexes({
@CompoundIndex(name = "age_idx", def = "{'name': 1, 'age': -1}")
})
public class Users implements Serializable{
private static final long serialVersionUID = 1L;
...省略代码
MongoDB默认会为每个document生成一个 _id 属性,作为默认主键,且默认值为ObjectId,可以更改 _id 的值(可为空字符串),但每个document必须拥有 _id 属性。
当然,也可以自己设置@Id主键,不过官方建议使用MongoDB自动生成。
声明该字段需要加索引,加索引后以该字段为条件检索将大大提高速度。
唯一索引的话是@Indexed(unique = true)。
也可以对数组进行索引,如果被索引的列是数组时,mongodb会索引这个数组中的每一个元素。
@Indexed
private String uid;
被该注解标注的,将不会被录入到数据库中。只作为普通的javaBean属性。
@Transient
private String address;
代表一个字段,可以不加,不加的话默认以参数名为列名。
@Field("firstName")
private String name;
当然了,以上的以上,可能仅仅是冰山一角,还有很多特性等待大家去挖掘。
原创声明:本文系作者授权腾讯云开发者社区发表,未经许可,不得转载。
如有侵权,请联系 cloudcommunity@tencent.com 删除。
原创声明:本文系作者授权腾讯云开发者社区发表,未经许可,不得转载。
如有侵权,请联系 cloudcommunity@tencent.com 删除。