1. Install Redis on windows
1. Download Redis
- Github download address: Releases microsoftarchive/redis GitHub
Redis-x64-3.0.504.zip
2. Unzip to a certain directory, mine is in c:/apps/redis
3. Start the redis server.
C:\apps\redis>redis-server redis.windows.conf
_._
_.-``__ ''-._
_.-`` `. `_. ''-._ Redis 3.0.504 (00000000/0) 64 bit
.-`` .-```. ```\/ _.,_ ''-._
( ' , .-` | `, ) Running in standalone mode
|`-._`-...-` __...-.``-._|'` _.-'| Port: 6379
| `-._ `._ / _.-' | PID: 39100
`-._ `-._ `-./ _.-' _.-'
|`-._`-._ `-.__.-' _.-'_.-'|
| `-._`-._ _.-'_.-' | http://redis.io
`-._ `-._`-.__.-'_.-' _.-'
|`-._`-._ `-.__.-' _.-'_.-'|
| `-._`-._ _.-'_.-' |
`-._ `-._`-.__.-'_.-' _.-'
`-._ `-.__.-' _.-'
`-._ _.-'
`-.__.-'
[39100] 22 May 14:48:13.225 # Server started, Redis version 3.0.504
[39100] 22 May 14:48:13.229 * The server is now ready to accept connections on port 6379
4. Open another command window to start Redis command
The command is redis-cli.exe.
set name hello is to keep a data whose name is name and value is hello
get name: is to take out the value of name
C:\apps\redis>redis-cli.exe 127.0.0.1:6379> set name hello OK 127.0.0.1:6379> get name "hello" 127.0.0.1:6379> get name
keys *: Take out all the keys that are said to be taken out.
127.0.0.1:6379> keys * 1) "Student:liu2" 2) "Student:liu5" 3) "Student" 4) "Student:liu3" 5) "name"
Use hmset to save data, use hget to get data
redis> HMSET myhash field1 "Hello" field2 "World" "OK" redis> HGET myhash field1 "Hello" redis> HGET myhash field2 "World"
Use hmset to keep data. key is application
HMSET application sample.property.name1 "somevalue" sample.property.name2 "anothervalue"
Use hgetall to get application data
127.0.0.1:6379> hgetall application 1) "sample.property.name1" 2) "somevalue" 3) "sample.property.name2" 4) "anothervalue" 127.0.0.1:6379> hget application sample.property.name1 "somevalue" 127.0.0.1:6379> hget application sample.property.name2 "anothervalue"
delete a key
127.0.0.1:6379> del certainkey (integer) 1
Delete a batch of data according to a certain rule
KEYS "prefix:*" | xargs DEL
2. Java spring code test Redis
Add maven dependency in pom.xml
<parent> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter-parent</artifactId> <version>2.7.10</version> <relativePath /> <!-- lookup parent from repository --> </parent> <dependencies> \t\t <dependency> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter-data-redis</artifactId> </dependency> <dependency> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter-web</artifactId> </dependency> <dependency> <groupId>org.springframework.data</groupId> <artifactId>spring-data-redis</artifactId> </dependency> <dependency> <groupId>redis.clients</groupId> <artifactId>jedis</artifactId> <type>jar</type> </dependency> </dependencies>
Create Configuration
@Configuration
public class RedisConfiguration {
@Bean
public RedisTemplate<String, Object> redisTemplate() {
RedisTemplate<String, Object> template = new RedisTemplate<>();
template.setConnectionFactory(jedisConnectionFactory());
return template;
}
@Bean
JedisConnectionFactory jedisConnectionFactory() {
JedisConnectionFactoryjedisConFactory
= new JedisConnectionFactory();
jedisConFactory.setHostName("localhost");
jedisConFactory.setPort(6379);
return jedisConFactory;
}
}
Create the Student class
@RedisHash("Student")
public class Student implements Serializable {
public enum Gender {
MALE, FEMALE
}
private String id;
private String name;
private Gender gender;
private int grade;
//...
}
Create a Redis repository
@Repository
public interface StudentRepository extends CrudRepository<Student, String> {}
Create StudentDataService
@Service
public class StudentDataService {
@Autowired
private StudentRepository studentRepository;
public Student saveStudent(String id) {
Student student = new Student(
id, "John Doe", Student.Gender.MALE, 1);
student = studentRepository. save(student);
return student;
\t
}
public Student getStudent(String id) {
Student retrievedStudent =
studentRepository.findById(id).get();
return retrievedStudent;
}
public Student updateStudent(Student student) {
Student dbStduent = this. getStudent(student. getId());
\t
dbStduent.setName(student.getName());
\t
dbStduent = studentRepository.save(dbStduent);
return dbStduent;
}
public void deleteStudent(Student student) {
studentRepository.deleteById(student.getId());
}
public List<Student> getAllStudents() {
List<Student> students = new ArrayList<>();
studentRepository.findAll().forEach(students::add);
return students;
}
}
Finally create a StudentController for testing
@RestController
@RequestMapping("/student")
public class StudentContoller {
@Autowired
private StudentDataService studentDataService;
@RequestMapping("/save/{id}")
public String saveStudent(@PathVariable("id") String id) {
//"Eng2015001"
Student student = studentDataService. saveStudent(id);
return student.toString();
}
@RequestMapping("/get/{id}")
public String getStudent(@PathVariable("id") String id) {
Student student = studentDataService. getStudent(id);
return student.toString();
}
@RequestMapping("/delete/{id}")
public String deleteStudent(@PathVariable("id")String id) {
\t
Student student = new Student();
student. setId(id);
\t
studentDataService.deleteStudent(student);
\t
return "success";
\t
}
@RequestMapping("/update/{id}")
public String updateStudent(@PathVariable("id") String id) {
\t
Student student = studentDataService. getStudent(id);
student.setName("updated1");
student = studentDataService. updateStudent(student);
return student.toString();
\t
}
@RequestMapping("/getAll")
public String getAllStudents() {
List<Student> students= studentDataService.getAllStudents();
return students. toString();
}
}
References
Introduction to Spring Data Redis | Baeldung