mongodb--与spring整合
一、spring-data-mongodbSpring 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：
4.0.0
com.yichun.test
test_yichun
0.0.1-SNAPSHOT
jar
test_yichun
http://maven.apache.org
UTF-8
4.11
4.1.1.RELEASE
org.springframework
spring-core
${spring.version}
org.springframework
spring-context
${spring.version}
org.springframework
spring-context-support
${spring.version}
org.springframework
spring-test
${spring.version}
org.mongodb
mongo-java-driver
2.12.4
org.springframework.data
spring-data-mongodb
1.6.1.RELEASE
junit
junit
${junit.version}
test
spring-config-mongodb.xml 配置文件如下：
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 ";
}
}
MongoTest 主运行类
1 package com.yichun.test.test_yichun;
2
3 import java.util.ArrayList;
4 import java.util.List;
5
6 import javax.annotation.Resource;
7
8 import org.junit.Test;
9 import org.junit.runner.RunWith;
10 import org.springframework.data.domain.Sort;
11 import org.springframework.data.domain.Sort.Direction;
12 import org.springframework.data.mongodb.core.FindAndModifyOptions;
13 import org.springframework.data.mongodb.core.MongoTemplate;
14 import org.springframework.data.mongodb.core.query.Criteria;
15 import org.springframework.data.mongodb.core.query.Query;
16 import org.springframework.data.mongodb.core.query.Update;
17 import org.springframework.test.context.ContextConfiguration;
18 import org.springframework.test.context.junit4.AbstractJUnit4SpringContextTests;
19 import org.springframework.test.context.junit4.SpringJUnit4ClassRunner;
20
21 import com.mongodb.WriteResult;
22
23 @RunWith(SpringJUnit4ClassRunner.class)
24 @ContextConfiguration(locations = "classpath:spring-config-mongodb.xml")
25 public class MongoTest extends AbstractJUnit4SpringContextTests {
26
27 @Resource
28 private MongoTemplate mongoTemplate;
29
30 @Test
31 public void testAddDoc() {
32 Person p = new Person("Joe", 34);
33 Person p2 = new Person("1001", "Joe", 34);
34 Person p11 = new Person("1011", "zhangsan", 20);
35 Person p12 = new Person("1012", "zhangsan2", 21);
36 Person p13 = new Person("1013", "zhangsan3", 23);
37 List list = new ArrayList();
38 list.add(p11);
39 list.add(p12);
40 list.add(p13);
41 this.mongoTemplate.insert(p);// 默认保存在person集合中(与类名称一致)
42 this.mongoTemplate.insert(p2, "person2");// 指定保存在person2集合中
43 this.mongoTemplate.insertAll(list);// 默认保存在person集合中(与类名称一致)
44 // mongoTemplate.insert(list, collectionName);//指定保存的集合
45 // mongoTemplate.insert(list, Person.class);// 默认保存在person集合中(与类名称一致)
46 }
47
48 @Test
49 publicvoid testFindDoc() {
50 // 根据id查询,此id为mongo生成的id
51 Person person = this.mongoTemplate.findById("1011", Person.class);
52 System.out.println(person);
53
54 // 使用query对象查询
55 Query query = new Query(Criteria.where("age").is(34));
56 person = this.mongoTemplate.findOne(query, Person.class);
57 System.out.println(person);
58
59 // 使用query对象查询列表
60 query = new Query(Criteria.where("age").lt(30)).// age小于30
61 with(new Sort(Direction.ASC, "age"));// age 升序
62 // query.with(Pageable );//可分页查询
63
64 List list = this.mongoTemplate.find(query.with(new Sort(Direction.ASC, "age")), Person.class);
65 System.out.println(list);
66 }
67
68 @Test
69 public void testUpdateDoc() {
70 // age为34的person，age加1
71 Query query = new Query(Criteria.where("id").is(1011));
72 Update update = new Update().inc("age", 1);
73 Person p = this.mongoTemplate.findAndModify(query, update, Person.class);
74 System.out.println(p);
75
76 p = this.mongoTemplate.findAndModify(query, update, new FindAndModifyOptions().returnNew(true), Person.class);// returnNew(true)将更新后的对象返回
77 System.out.println(p);
78
79 // 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
80 query = new Query(Criteria.where("age").is(21));
81 update = new Update().set("name", "zhangsan22");
82 WriteResult result = this.mongoTemplate.updateFirst(query, update, Person.class);
83 System.out.println(result);
84
85 // 将age为21的name改成zhangsan22，如果有多个age为21的，全部更新
86 result = mongoTemplate.upsert(query, update, Person.class);
87 System.out.println(result);
88 }
89
90
91 @Test
92 public void testRemoveDoc(){
93 Query query = new Query(Criteria.where("age").is(35));
94 // mongoTemplate.findAndRemove(query, Person.class);//删除文档
95 // mongoTemplate.findAndRemove(query, Person.class,
96 // collectionName)//删除指定集合内的文档
97 Person person = this.mongoTemplate.findOne(query, Person.class);
98 WriteResult result = this.mongoTemplate.remove(person);
99 System.out.println(result);
100 this.mongoTemplate.remove(query, Person.class);// 根据query对象删除文档
101
102 // mongoTemplate.remove(person, collection);//从指定的集合中删除文档
103 // mongoTemplate.remove(query, collectionName);//从指定的集合中根据query对象删除文档
104 // 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
105
106 }
107
108 }
页:
[1]