mongodb--与spring整合

时间：2023-03-08 16:14:01

一、spring-data-mongodb

　　Spring Data是Spring专门用来数据处理的一个子项目，Spring Data除了spring-data-mongodb之外还包括spring-data-jp、spring-data-redis等项目。spring-data-mongodb就是针对mongodb的一个项目。通过它我们可以对nongodb进行操作。spring-data-mongodb的项目地址为：http://projects.spring.io/spring-data-mongodb/ 。

二、实例

　　例子使用maven构建并使用spring-test运行。

　　pom.xml 内容如下：

<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/xsd/maven-4.0.0.xsd">

    <modelVersion>4.0.0</modelVersion>

    <groupId>com.yichun.test</groupId>

    <artifactId>test_yichun</artifactId>

    <version>0.0.1-SNAPSHOT</version>

    <packaging>jar</packaging>

    <name>test_yichun</name>

    <url>http://maven.apache.org</url>

    <properties>

        <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>

        <junit.version>4.11</junit.version>

        <spring.version>4.1.1.RELEASE</spring.version>

    </properties>

    <dependencies>

        <dependency>

            <groupId>org.springframework</groupId>

            <artifactId>spring-core</artifactId>

            <version>${spring.version}</version>

        </dependency>

        <dependency>

            <groupId>org.springframework</groupId>

            <artifactId>spring-context</artifactId>

            <version>${spring.version}</version>

        </dependency>

        <dependency>

            <groupId>org.springframework</groupId>

            <artifactId>spring-context-support</artifactId>

            <version>${spring.version}</version>

        </dependency>

        <dependency>

            <groupId>org.springframework</groupId>

            <artifactId>spring-test</artifactId>

            <version>${spring.version}</version>

        </dependency>

        <dependency>

            <groupId>org.mongodb</groupId>

            <artifactId>mongo-java-driver</artifactId>

            <version>2.12.4</version>

        </dependency>

        <dependency>

            <groupId>org.springframework.data</groupId>

            <artifactId>spring-data-mongodb</artifactId>

            <version>1.6.1.RELEASE</version>

        </dependency>

        <dependency>

            <groupId>junit</groupId>

            <artifactId>junit</artifactId>

            <version>${junit.version}</version>

            <scope>test</scope>

        </dependency>

    </dependencies>

</project>

　　spring-config-mongodb.xml 配置文件如下：

<?xml version="1.0" encoding="UTF-8"?>

<beans xmlns="http://www.springframework.org/schema/beans"

    xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:context="http://www.springframework.org/schema/context"

    xmlns:mongo="http://www.springframework.org/schema/data/mongo"

    xsi:schemaLocation="

    http://www.springframework.org/schema/context

    http://www.springframework.org/schema/context/spring-context-3.0.xsd

    http://www.springframework.org/schema/data/mongo

    http://www.springframework.org/schema/data/mongo/spring-mongo-1.0.xsd

    http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-3.0.xsd">

    <mongo:mongo host="127.0.0.1" port="27017" />

    <mongo:db-factory dbname="mongotest" mongo-ref="mongo" />

    <bean id="mongoTemplate" class="org.springframework.data.mongodb.core.MongoTemplate">

        <constructor-arg name="mongoDbFactory" ref="mongoDbFactory" />

    </bean>

</beans>

　　Person.java 对应于保存的文档　　

package com.yichun.test.test_yichun;

public class Person {

    private String id;

    private String name;

    private int age;

    public Person() {

    }

    public Person(String name, int age) {

        this.name = name;

        this.age = age;

    }

    public Person(String id, String name, int age) {

        this.id = id;

        this.name = name;

        this.age = age;

    }

    public String getId() {

        return id;

    }

    public String getName() {

        return name;

    }

    public int getAge() {

        return age;

    }

    @Override

    public String toString() {

        return "Person [id=" + id + ", name=" + name + ", age=" + age + "]";

    }

}

　　MongoTest 主运行类

 package com.yichun.test.test_yichun;

 import java.util.ArrayList;

 import java.util.List;

 import javax.annotation.Resource;

 import org.junit.Test;

 import org.junit.runner.RunWith;

 import org.springframework.data.domain.Sort;

 import org.springframework.data.domain.Sort.Direction;

 import org.springframework.data.mongodb.core.FindAndModifyOptions;

 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.test.context.ContextConfiguration;

 import org.springframework.test.context.junit4.AbstractJUnit4SpringContextTests;

 import org.springframework.test.context.junit4.SpringJUnit4ClassRunner;

 import com.mongodb.WriteResult;

 @RunWith(SpringJUnit4ClassRunner.class)

 @ContextConfiguration(locations = "classpath:spring-config-mongodb.xml")

 public class MongoTest extends AbstractJUnit4SpringContextTests {

     @Resource

     private MongoTemplate mongoTemplate;

     @Test

     public void testAddDoc() {

         Person p = new Person("Joe", 34);

         Person p2 = new Person("1001", "Joe", 34);

         Person p11 = new Person("1011", "zhangsan", 20);

         Person p12 = new Person("1012", "zhangsan2", 21);

         Person p13 = new Person("1013", "zhangsan3", 23);

         List<Person> list = new ArrayList<Person>();

         list.add(p11);

         list.add(p12);

         list.add(p13);

         this.mongoTemplate.insert(p);// 默认保存在person集合中(与类名称一致)

         this.mongoTemplate.insert(p2, "person2");// 指定保存在person2集合中

         this.mongoTemplate.insertAll(list);// 默认保存在person集合中(与类名称一致)

         // mongoTemplate.insert(list, collectionName);//指定保存的集合

         // mongoTemplate.insert(list, Person.class);// 默认保存在person集合中(与类名称一致)

     }

     @Test

     public  void testFindDoc() {

         // 根据id查询,此id为mongo生成的id

         Person person = this.mongoTemplate.findById("1011", Person.class);

         System.out.println(person);

         // 使用query对象查询

         Query query = new Query(Criteria.where("age").is(34));

         person = this.mongoTemplate.findOne(query, Person.class);

         System.out.println(person);

         // 使用query对象查询列表

         query = new Query(Criteria.where("age").lt(30)).// age小于30

                 with(new Sort(Direction.ASC, "age"));// age 升序

         // query.with(Pageable );//可分页查询

         List<Person> list = this.mongoTemplate.find(query.with(new Sort(Direction.ASC, "age")), Person.class);

         System.out.println(list);

     }

     @Test

     public void testUpdateDoc() {

         // age为34的person，age加1

         Query query = new Query(Criteria.where("id").is(1011));

         Update update = new Update().inc("age", 1);

         Person p = this.mongoTemplate.findAndModify(query, update, Person.class);

         System.out.println(p);

         p = this.mongoTemplate.findAndModify(query, update, new FindAndModifyOptions().returnNew(true), Person.class);// returnNew(true)将更新后的对象返回

         System.out.println(p);

         // 将age为21的name改成zhangsan22，如果有多个age为21的，则只改变第一个

         query = new Query(Criteria.where("age").is(21));

         update = new Update().set("name", "zhangsan22");

         WriteResult result = this.mongoTemplate.updateFirst(query, update, Person.class);

         System.out.println(result);

         // 将age为21的name改成zhangsan22，如果有多个age为21的，全部更新

         result = mongoTemplate.upsert(query, update, Person.class);

         System.out.println(result);

     }

     @Test

     public void testRemoveDoc(){

         Query query = new Query(Criteria.where("age").is(35));

         // mongoTemplate.findAndRemove(query, Person.class);//删除文档

         // mongoTemplate.findAndRemove(query, Person.class,

         // collectionName)//删除指定集合内的文档

         Person person = this.mongoTemplate.findOne(query, Person.class);

         WriteResult result = this.mongoTemplate.remove(person);

         System.out.println(result);

         this.mongoTemplate.remove(query, Person.class);// 根据query对象删除文档

         // mongoTemplate.remove(person, collection);//从指定的集合中删除文档

         // mongoTemplate.remove(query, collectionName);//从指定的集合中根据query对象删除文档

         // mongoTemplate.remove(query, entityClass, collectionName)//从指定的集合中根据query对象和class类型删除文档

     }

 }

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