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

 #mongodb note:mongo3.x will not use host and port,only use uri
 #spring.data.mongodb.host=192.168.22.110
 #spring.data.mongodb.port=27017
 #spring.data.mongodb.database=myfirstMongodb
 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

 package com.xxx.firstboot.domain;

 import org.springframework.data.annotation.Id;

 /**
  * 测试复杂的mongo查询
  */
 public class Admin {
     @Id
     private String adminId;
     private String name;
     private Integer sex;
     private String address;

     public String getAdminId() {
         return adminId;
     }

     public void setAdminId(String adminId) {
         this.adminId = adminId;
     }

     public String getName() {
         return name;
     }

     public void setName(String name) {
         this.name = name;
     }

     public Integer getSex() {
         return sex;
     }

     public void setSex(Integer sex) {
         this.sex = sex;
     }

     public String getAddress() {
         return address;
     }

     public void setAddress(String address) {
         this.address = address;
     }

 }

注意：

• @Id必须有

3、AdminRepository

 package com.xxx.firstboot.mongo;

 import org.springframework.data.mongodb.repository.MongoRepository;

 import com.xxx.firstboot.domain.Admin;

 public interface AdminRepository extends MongoRepository<Admin, String> {
 }

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

 /*********************测试复杂的mongo查询**********************/
     @Autowired
     private AdminRepository adminRepository;
     @Autowired
     private MongoTemplate mongoTemplate;

     @ApiOperation("增加一个Admin")
     @RequestMapping(value = "/addAdmin", method = RequestMethod.GET)
     public Admin addAdmin(@RequestParam("name") String name,
                           @RequestParam("sex") Integer sex,
                           @RequestParam("address") String address) {
         Admin admin = new Admin();
         admin.setName(name);
         admin.setSex(sex);
         admin.setAddress(address);
         return adminRepository.save(admin);
     }

     @ApiOperation("获取所有的Admin")
     @RequestMapping(value = "/getAllAdmin", method = RequestMethod.GET)
     public List<Admin> getAllAdmin() {
         return adminRepository.findAll();
     }

     @ApiOperation("复杂的admin查询")
     @RequestMapping(value = "/getAdminByNameAndSexOrAddress", method = RequestMethod.GET)
     public Admin getAdminByNameAndSexOrAddress(@RequestParam("name") String name,
                                                  @RequestParam(value="sex",required=false) Integer sex,
                                                  @RequestParam(value="address",required=false) String address) {
         /**
          * OR
          */
         BasicDBList orList = new BasicDBList(); //用于记录
         if (sex != null) {
             orList.add(new BasicDBObject("sex", sex));
         }
         if (StringUtils.isNotBlank(address)) {
             orList.add(new BasicDBObject("address", address));
         }
         BasicDBObject orDBObject = new BasicDBObject("$or", orList);

         /**
          * and
          */
         BasicDBList andList = new BasicDBList();
         andList.add(new BasicDBObject("name", name));
         andList.add(orDBObject);
         BasicDBObject andDBObject = new BasicDBObject("$and", andList);

         return mongoTemplate.findOne(new BasicQuery(andDBObject), Admin.class);

     }

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）

注意：mongodb的查询字段必须是小写。

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