第十二章 springboot + mongodb（复杂查询）

• 简单查询：使用自定义的XxxRepository接口即可。（见 第十一章 springboot + mongodb（简单查询））
• 复杂查询：使用MongoTemplate以及一些查询条件构建类（BasicDBList、BasicDBObject、Criteria等）

1、application.properties

1 #mongodb note:mongo3.x will not use host and port,only use uri
2 #spring.data.mongodb.host=192.168.22.110
3 #spring.data.mongodb.port=27017
4 #spring.data.mongodb.database=myfirstMongodb
5 spring.data.mongodb.uri=mongodb://192.168.22.110:27017/myfirstMongodb

说明：

• mongo2.x支持以上两种配置方式
• mongo3.x仅支持uri方式

2、Admin

 1 package com.xxx.firstboot.domain;
 2
 3 import org.springframework.data.annotation.Id;
 4
 5 /**
 6  * 测试复杂的mongo查询
 7  */
 8 public class Admin {
 9     @Id
10     private String adminId;
11     private String name;
12     private Integer sex;
13     private String address;
14
15     public String getAdminId() {
16         return adminId;
17     }
18
19     public void setAdminId(String adminId) {
20         this.adminId = adminId;
21     }
22
23     public String getName() {
24         return name;
25     }
26
27     public void setName(String name) {
28         this.name = name;
29     }
30
31     public Integer getSex() {
32         return sex;
33     }
34
35     public void setSex(Integer sex) {
36         this.sex = sex;
37     }
38
39     public String getAddress() {
40         return address;
41     }
42
43     public void setAddress(String address) {
44         this.address = address;
45     }
46
47 }

注意：

• @Id必须有

3、AdminRepository

1 package com.xxx.firstboot.mongo;
2
3 import org.springframework.data.mongodb.repository.MongoRepository;
4
5 import com.xxx.firstboot.domain.Admin;
6
7 public interface AdminRepository extends MongoRepository<Admin, String> {
8 }

说明：该接口用于简单查询。这里是一个空接口，具有CRUD功能。

4、CustomerController

 1 /*********************测试复杂的mongo查询**********************/
 2     @Autowired
 3     private AdminRepository adminRepository;
 4     @Autowired
 5     private MongoTemplate mongoTemplate;
 6
 7     @ApiOperation("增加一个Admin")
 8     @RequestMapping(value = "/addAdmin", method = RequestMethod.GET)
 9     public Admin addAdmin(@RequestParam("name") String name,
10                           @RequestParam("sex") Integer sex,
11                           @RequestParam("address") String address) {
12         Admin admin = new Admin();
13         admin.setName(name);
14         admin.setSex(sex);
15         admin.setAddress(address);
16         return adminRepository.save(admin);
17     }
18
19     @ApiOperation("获取所有的Admin")
20     @RequestMapping(value = "/getAllAdmin", method = RequestMethod.GET)
21     public List<Admin> getAllAdmin() {
22         return adminRepository.findAll();
23     }
24
25     @ApiOperation("复杂的admin查询")
26     @RequestMapping(value = "/getAdminByNameAndSexOrAddress", method = RequestMethod.GET)
27     public Admin getAdminByNameAndSexOrAddress(@RequestParam("name") String name,
28                                                  @RequestParam(value="sex",required=false) Integer sex,
29                                                  @RequestParam(value="address",required=false) String address) {
30         /**
31          * OR
32          */
33         BasicDBList orList = new BasicDBList(); //用于记录
34         if (sex != null) {
35             orList.add(new BasicDBObject("sex", sex));
36         }
37         if (StringUtils.isNotBlank(address)) {
38             orList.add(new BasicDBObject("address", address));
39         }
40         BasicDBObject orDBObject = new BasicDBObject("$or", orList);
41
42         /**
43          * and
44          */
45         BasicDBList andList = new BasicDBList();
46         andList.add(new BasicDBObject("name", name));
47         andList.add(orDBObject);
48         BasicDBObject andDBObject = new BasicDBObject("$and", andList);
49
50         return mongoTemplate.findOne(new BasicQuery(andDBObject), Admin.class);
51
52     }

说明：

• getAdminByNameAndSexOrAddress要实现select * from admin where name = ? and (sex = ? or address = ?)
• 通过BasicDBList、BasicDBObject构建查询参数
• findOne返回第一个符合条件的结果、find返回符合条件的结果列表
• 以上查询的collection是admin（VO的简单类名），也可以指定从某一个collection中查询（查看find、findOne等方法）

测试：

启动mongo，启动应用，打开swagger，访问即可。

参考：

http://blog.csdn.net/congcong68/article/details/47183209