spring-boot-starter-data-redis 2.1 以上支持以repository的方式存取对象了。
1,导入依赖包
<dependency>
<groupId>org.springframework.boot
</groupId>
<artifactId>spring-boot-starter-data-redis
</artifactId>
</dependency>
2,定义实体
@Data
public class Cat {
@Indexed
private String name
;
private String color
;
}
@Data
@ToString
@RedisHash(value
= "user")
public class TUser {
@Id
private String id
;
@Indexed
private String name
;
private String password
;
private Cat cat
;
}
3,定义repository
支持方法名和example查询，前提查询字段必须是加了@Index注解。
public interface UserDao extends CrudRepository<TUser,String>,QueryByExampleExecutor
<TUser> {
TUser
findByName(String name
);
}
4,新增，查询测试
@RunWith(SpringRunner
.class)
@SpringBootTest
public class RedisDemoApplicationTests {
@Autowired
private UserDao userDao
;
@Test
public void save() {
Cat cat
= new Cat();
cat
.setColor("hongse");
cat
.setName("小狗");
TUser user
= new TUser();
user
.setId("2");
user
.setName("haha");
user
.setPassword("heiheihei");
user
.setCat(cat
);
userDao
.save(user
);
}
@Test
public void findOne(){
TUser user
= userDao
.findById("2").get();
System
.out
.println(user
);
}
@Test
public void findByExample(){
TUser user
= new TUser();
Cat cat
= new Cat();
cat
.setName("花花");
user
.setCat(cat
);
System
.out
.println(userDao
.findOne(Example
.of(user
)));
}
@Test
public void findByName(){
System
.out
.println(userDao
.findByName("hahaha"));
}
}
5,Example查询局限
官方文档的一段话。
The following list shows properties not supported by Query by Example:
Case-insensitive matching
Regex, prefix/contains/suffix String-matching
Querying of Associations, Collection, and Map-like properties
Inclusion of null values from the criteria
findAll with sorting
可见对于list，map里包含对象的example查询，是无效的。
