Java操作Redis数据

  Redis 是完全开源免费的，遵守BSD协议，先进的key - value持久化产品。它通常被称为数据结构服务器，因为值（value）可以是 字符串(String), 哈希(Map),列表(list), 集合(sets) 和 有序集合(sorted sets)等类型。下面是使用spring-data-redis分别针对key和value的操作。

 

1.Key（键）

1. public class KeysTest extends RedisCommon {
2. private static StringRedisTemplate template;
3. private static String key = "key1";
4.  
5. public static void main(String[] args) {
6. log.info("-----------Starting Redis keys testing-----------");
7. ApplicationContext ctx = SpringApplication.run(KeysTest.class, args);
8. template = ctx.getBean(StringRedisTemplate.class);
9. KeysTest keysTest = ctx.getBean(KeysTest.class);
10. keysTest.initValue();
11.  
12. log.info("KeysTest @##@ randomKey: " + template.randomKey());
13.  
14. keysTest.expireKey(key, 2);
15. // keysTest.persistKey(key, 2);
16.  
17. String newkey = "newKey";
18. // template.rename(key, newkey);
19. template.renameIfAbsent(key, newkey);
20.  
21. Set<String> keys = template.keys("*");
22. log.info("KeysTest @##@ keys:" + keys);
23. for (String key : keys) {
24. log.info("KeysTest @##@ " + key + " expire:"
25. + template.getExpire(key));
26. // template.getExpire(key, TimeUnit.SECONDS);
27. }
28.  
29. int dbIndex = 1;// ref:http://redisdoc.com/key/move.html
30. log.info("KeysTest @##@ move " + key + " to db" + dbIndex + ": "
31. + template.move(key, 1));
32.  
33. // template.delete(key);
34. template.delete(keys);
35. log.info("KeysTest @##@ delete keys: " + keys);
36.  
37. // template.exec();
38. // template.multi();
39. // template.discard();
40.  
41. // template.slaveOf(host, port);
42. // template.slaveOfNoOne();
43.  
44. // template.watch(key);
45. // template.watch(keys);
46. // template.unwatch();
47. log.info("-----------End Redis keys testing-----------");
48. }
49.  
50. public void initValue() {
51. String value = "hello,redis";
52. template.opsForValue().set(key, value);
53. Set<String> keys = new HashSet<String>() {
54. private static final long serialVersionUID = -4402948387930279259L;
55. {
56. this.add("key2");
57. this.add("key3");
58. this.add("key4");
59. }
60. };
61. try {
62. byte[] bytes = template.dump(key);
63. log.info("KeysTest # key dump:" + new String(bytes));
64. for (String k : keys) {
65. template.restore(k, bytes, 0, TimeUnit.SECONDS);
66. }
67. } catch (Exception e) {
68. e.printStackTrace();
69. }
70. }
71.  
72. public boolean expireKey(String key, long expiretime) {
73. log.info("KeysTest @##@ has " + key + " : " + template.hasKey(key));
74. log.info("KeysTest @##@ expire " + key + " for " + expiretime
75. + " seconds : "
76. + template.expire(key, expiretime, TimeUnit.SECONDS));
77. // template.expireAt(key, new Date());
78. try {
79. Thread.sleep((expiretime + 1) * 1000);
80. } catch (InterruptedException e) {
81. e.printStackTrace();
82. }
83. boolean result = template.hasKey(key);
84. log.info("KeysTest @##@ has " + key + " : " + result);
85. return result;
86. }
87.  
88. public boolean persistKey(String key, long expiretime) {
89. log.info("KeysTest @##@ has " + key + " : " + template.hasKey(key));
90. log.info("KeysTest @##@ expire " + key + " for " + expiretime
91. + " seconds : "
92. + template.expire(key, expiretime, TimeUnit.SECONDS));
93. log.info("KeysTest @##@ persist " + key + " : " + template.persist(key));
94. try {
95. Thread.sleep((expiretime + 1) * 1000);
96. } catch (InterruptedException e) {
97. e.printStackTrace();
98. }
99. return template.hasKey(key);
100. }
101.  
102. }

2.String（字符串）

1. public class StringsTest extends RedisCommon {
2. private static StringRedisTemplate template;
3. private static String key = "strKey";
4.  
5. public static void main(String[] args) throws InterruptedException {
6. log.info("-----------Starting Redis Strings testing-----------");
7. ApplicationContext ctx = SpringApplication.run(StringsTest.class, args);
8. template = ctx.getBean(StringRedisTemplate.class);
9. StringsTest stringsTest = ctx.getBean(StringsTest.class);
10.  
11. String value = "hello, redis";
12. template.opsForValue().set(key, value);
13. log.info("StringsTest @##@ " + key + "'s value: " + template.opsForValue().get(key));
14. log.info("StringsTest @##@ " + key + "'s size: " + template.opsForValue().size(key));
15.  
16. stringsTest.getRange(key, 0, 5);
17.  
18. template.opsForValue().getAndSet(key, "hello, redis world");
19. log.info("StringsTest @##@ " + key + "'s value after getAndSet: " + template.opsForValue().get(key));
20.  
21. stringsTest.multiOperation();
22.  
23. stringsTest.incrementDouble();
24.  
25. stringsTest.incrementLong();
26. }
27.  
28. public void getRange(String key, int start, int end){
29. log.info("StringsTest @##@ " + key + "'s value: " + template.opsForValue().get(key));
30. log.info("StringsTest @##@ " + key + " range from "+start +" to " + end +" value is: " + template.opsForValue().get(key, start, end));
31. }
32.  
33. public void multiOperation(){
34. Map<String, String> m = new HashMap<>();
35. Set<String> keys = new HashSet<>();
36. for(int i=0;i< 4;i++){
37. m.put("key" + i, "value" + i);
38. keys.add("key" + i);
39. }
40. template.opsForValue().multiSet(m);
41. log.info("StringsTest @##@ multiSet : done.");
42. log.info("StringsTest @##@ multiGet : " + template.opsForValue().multiGet(keys));
43. }
44.  
45. public void incrementDouble() {
46. String hashKey = UUID.randomUUID().toString();
47. Double value1 = template.opsForValue().increment(hashKey, 30.5d);
48. log.info(hashKey + " has value :" + value1);
49. double d = 30.2d;
50. Double value2 = template.opsForValue().increment(hashKey, d);
51. log.info(hashKey + " has value: " + value2 + ", after increment " + d);
52. }
53.  
54. public void incrementLong() {
55. String hashKey = UUID.randomUUID().toString();
56. long value1 = template.opsForValue().increment(hashKey, 30l);
57. log.info(hashKey + " has value :" + value1);
58. long l = 25l;
59. long value2 = template.opsForValue().increment(hashKey, l);
60. log.info(hashKey + " has value: " + value2 + ", after increment " + l);
61. }
62. }

3.Hash（哈希表）

1. public class HashTest extends RedisCommon {
2. private static RedisTemplate<String, Map<String, UserInfo>> userTemplate;
3. private static RedisTemplate<String, Map<String, Double>> doubleTemplate;
4. private static RedisTemplate<String, Map<String, Long>> longTemplate;
5. private static String key = "UserInfo";
6.  
7. public static void main(String[] args) throws InterruptedException {
8. log.info("-----------Starting Redis hash testing-----------");
9. ApplicationContext ctx = SpringApplication.run(HashTest.class, args);
10. RedisConnectionFactory connectionFactory = ctx
11. .getBean(RedisConnectionFactory.class);
12. userTemplate = new RedisTemplate<>();
13. userTemplate.setConnectionFactory(connectionFactory);
14. userTemplate.setKeySerializer(userTemplate.getStringSerializer());
15. userTemplate.setHashKeySerializer(userTemplate.getStringSerializer());
16. userTemplate
17. .setHashValueSerializer(new JacksonJsonRedisSerializer<UserInfo>(
18. UserInfo.class));
19. userTemplate.afterPropertiesSet();
20.  
21. doubleTemplate = new RedisTemplate<>();
22. doubleTemplate.setConnectionFactory(connectionFactory);
23. doubleTemplate.setKeySerializer(doubleTemplate.getStringSerializer());
24. doubleTemplate.setHashKeySerializer(doubleTemplate.getStringSerializer());
25. doubleTemplate.setHashValueSerializer(doubleTemplate.getDefaultSerializer());
26. doubleTemplate.afterPropertiesSet();
27.  
28. longTemplate = new RedisTemplate<>();
29. longTemplate.setConnectionFactory(connectionFactory);
30. longTemplate.setKeySerializer(longTemplate.getStringSerializer());
31. longTemplate.setHashKeySerializer(longTemplate.getStringSerializer());
32. longTemplate.setHashValueSerializer(new LongSerializer());
33. longTemplate.afterPropertiesSet();
34.  
35. HashTest hashTest = ctx.getBean(HashTest.class);
36. // hashTest.insert();
37. // hashTest.batchInsert();
38. // hashTest.insertIfAbsent();
39. // hashTest.findAll();
40. // hashTest.findOne();
41. // hashTest.findAllKeys();
42. // hashTest.incrementDouble();
43. hashTest.incrementLong();
44. }
45.  
46. public void insert() {
47. UserInfo info = new UserInfo();
48. info.setName("Tomy");
49. info.setAge(20);
50. info.setBirthday(new Date());
51. info.setId(UUID.randomUUID().toString());
52. userTemplate.opsForHash().put(key, info.getId(), info);
53. log.info("insert User[" + info + "] success!");
54. log.info("User Hash size is : " + userTemplate.opsForHash().size(key));
55. }
56.  
57. public void batchInsert() {
58. Map<String, UserInfo> users = new HashMap<>();
59. for (int i = 1; i <= 3; i++) {
60. UserInfo info = new UserInfo();
61. info.setName("Tomy" + i);
62. info.setAge(20 + i);
63. info.setBirthday(new Date());
64. info.setId(UUID.randomUUID().toString());
65. users.put(info.getId(), info);
66. }
67. userTemplate.opsForHash().putAll(key, users);
68. log.info("batchInsert Users[" + users + "] success!");
69. log.info("User Hash size is : " + userTemplate.opsForHash().size(key));
70. }
71.  
72. public void insertIfAbsent() {
73. UserInfo info = new UserInfo();
74. info.setName("Tomy4");
75. info.setAge(20);
76. info.setBirthday(new Date());
77. info.setId(UUID.randomUUID().toString());
78. userTemplate.opsForHash().putIfAbsent(key, info.getId(), info);
79. log.info("insertIfAbsent User[" + info + "] success!");
80. log.info("User Hash size is : " + userTemplate.opsForHash().size(key));
81. }
82.  
83. public void findAll() {
84. Map<Object, Object> users = userTemplate.opsForHash().entries(key);
85. log.info("All User[" + users + "]");
86. log.info("findAll User size is : " + users.size());
87. }
88.  
89. public UserInfo findOne() {
90. String hashKey = "2ca66275-88ab-49e5-8651-b987e55d9347";
91. Object userInfo = userTemplate.opsForHash().get(key, hashKey);
92. // boolean have = userTemplate.opsForHash().hasKey(hashKey, hashKey);
93. log.info("find one : " + userInfo);
94. return userInfo != null ? (UserInfo) userInfo : null;
95. }
96.  
97. public Set<Object> findAllKeys() {
98. Set<Object> users = userTemplate.opsForHash().keys(key);
99. log.info("find : " + users.size() + " users :" + users);
100. return users;
101. }
102.  
103. public void scan() {
104. userTemplate.opsForHash().scan(key, ScanOptions.NONE);
105. }
106.  
107. public void incrementDouble() {
108. String hashKey = UUID.randomUUID().toString();
109. Double value1 = doubleTemplate.opsForHash().increment(key, hashKey,
110. Double.valueOf("30"));
111. log.info(key + ":" + hashKey + " has value :" + value1);
112. Double delta = Double.valueOf("30.3");
113. Double value2 = doubleTemplate.opsForHash().increment(key, hashKey, delta);
114. log.info(key + ":" + hashKey + " has value: " + value2 + ", after increment " + delta);
115. }
116.  
117. public void incrementLong() {
118. String hashKey = UUID.randomUUID().toString();
119. long value1 = doubleTemplate.opsForHash().increment(key, hashKey, 30l);
120. log.info(key + ":" + hashKey + " has value :" + value1);
121. long delta = 20l;
122. long value2 = doubleTemplate.opsForHash().increment(key, hashKey, delta);
123. log.info(key + ":" + hashKey + " has value: " + value2 + ", after increment " + delta);
124. }
125.  
126. }

 

4.List（列表）

1. public class ListsTest extends RedisCommon {
2. private static RedisTemplate<String, UserInfo> userTemplate;
3.  
4. public static void main(String[] args) throws InterruptedException {
5. log.info("-----------Starting Redis Lists testing-----------");
6. ApplicationContext ctx = SpringApplication.run(ListsTest.class, args);
7. RedisConnectionFactory connectionFactory = ctx
8. .getBean(RedisConnectionFactory.class);
9. userTemplate = new RedisTemplate<>();
10. userTemplate.setConnectionFactory(connectionFactory);
11. userTemplate.setKeySerializer(userTemplate.getStringSerializer());
12. userTemplate.setValueSerializer(new JacksonJsonRedisSerializer<UserInfo>(
13. UserInfo.class));
14. userTemplate.afterPropertiesSet();
15.  
16. String key = "UserInfo";
17.  
18. ListsTest listsTest = ctx.getBean(ListsTest.class);
19. listsTest.leftpush(key);
20. listsTest.leftpushBatch(key);
21. listsTest.leftpop(key);
22. listsTest.rightPopAndLeftPush(key);
23. }
24.  
25. public void leftpush(String key) {
26. int size = 10;
27. for(int i = 0; i < size; i++){
28. UserInfo info = new UserInfo();
29. info.setName("Tomy" + i);
30. info.setAge(20 + i);
31. info.setBirthday(new Date());
32. info.setId(UUID.randomUUID().toString());
33. userTemplate.opsForList().leftPush(key, info);
34. //userTemplate.opsForList().leftPush(key, pivot, value)
35. //userTemplate.opsForList().leftPushIfPresent(key, value)
36. //userTemplate.opsForList().rightPush(key, pivot, value)
37. //userTemplate.opsForList().rightPushIfPresent(key, value)
38. }
39. log.info("insert [" + size + "] User success! " + key + "'s size is:" + userTemplate.opsForList().size(key));
40. }
41.  
42. public void leftpushBatch(String key){
43. int size = 20;
44. List<UserInfo> users = new ArrayList<>();
45. for(int i = 10; i < size; i++){
46. UserInfo info = new UserInfo();
47. info.setName("Tomy" + i);
48. info.setAge(20 + i);
49. info.setBirthday(new Date());
50. info.setId(UUID.randomUUID().toString());
51. users.add(info);
52. }
53. userTemplate.opsForList().leftPushAll(key, users.toArray(new UserInfo[users.size()]));
54. //userTemplate.opsForList().rightPushAll(key, (UserInfo[])users.toArray());
55. log.info("batchinsert [" + users.size() + "] User success! " + key + "'s size is:" + userTemplate.opsForList().size(key));
56. }
57.  
58. public void leftpop(String key){
59. UserInfo userInfo = userTemplate.opsForList().leftPop(key, 2, TimeUnit.SECONDS);
60. //userTemplate.opsForList().leftPop(key);
61. AtomicInteger ai = new AtomicInteger(0);
62. while(userInfo != null){
63. ai.incrementAndGet();
64. userInfo = userTemplate.opsForList().leftPop(key, 2, TimeUnit.SECONDS);
65. }
66. log.info("pop [" + ai.get() + "] Users from " + key);
67. }
68.  
69. public void rightPopAndLeftPush(String srcKey){
70. String destinationKey = "destinationKey";
71. log.info("srcKey [" + srcKey + "]'s size : " + userTemplate.opsForList().size(srcKey));
72. log.info("destKey [" + destinationKey + "]'s size : " + userTemplate.opsForList().size(destinationKey));
73. UserInfo userInfo = userTemplate.opsForList().rightPopAndLeftPush(srcKey, destinationKey);
74. while(userInfo != null){
75. userInfo = userTemplate.opsForList().rightPopAndLeftPush(srcKey, destinationKey, 2, TimeUnit.SECONDS);
76. }
77. log.info("After rightPopAndLeftPush destKey [" + destinationKey + "]'s size : " + userTemplate.opsForList().size(destinationKey));
78. }
79.  
80. }

 

5.Set（集合）

1. public class SetTest extends RedisCommon {
2.  
3. public static void main(String[] args) throws InterruptedException {
4. log.info("-----------Starting Redis Set testing-----------");
5. ApplicationContext ctx = SpringApplication.run(SetTest.class, args);
6. StringRedisTemplate st = ctx.getBean(StringRedisTemplate.class);
7. String key = "SetKey";
8. String destKey = "DestKey";
9. String[] values = new String[]{"value1","value2","value3","value4","value5","value6","value7"};
10. log.info("SetKey add [" + st.opsForSet().add(key, values ) + "] values ");
11. log.info("SetKey's member " + st.opsForSet().members(key));
12. String value5 = "value5";
13. log.info(value5 + " is member of SetKey's : " + st.opsForSet().isMember(key, value5));
14. log.info("SetKey's randomMember [" + st.opsForSet().randomMember(key) + "]");
15. log.info("SetKey's size: " + st.opsForSet().size(key));
16.  
17. String[] subValues = new String[]{"value1","value2","value3"};
18. log.info("SetKey remove " + st.opsForSet().remove(key, subValues) + " members");
19. log.info("SetKey's size: " + st.opsForSet().size(key));
20.  
21. log.info("SetKey move to DestKey: " + st.opsForSet().move(key, value5, destKey));
22. log.info("SetKey's size: " + st.opsForSet().size(key));
23. log.info("DestKey size: " + st.opsForSet().size(destKey));
24.  
25. String popValue = st.opsForSet().pop(key);
26. log.info("SetKey move to DestKey: " + st.opsForSet().move(key, popValue, destKey));
27. log.info("SetKey's size: " + st.opsForSet().size(key));
28. log.info("DestKey size: " + st.opsForSet().size(destKey));
29.  
30. //st.opsForSet().difference(key, destKey);
31. //st.opsForSet().differenceAndStore(key, otherKeys, destKey);
32.  
33. //st.opsForSet().intersect(key, destKey);
34. //st.opsForSet().intersectAndStore(key, otherKey, destKey);
35. }
36.  
37. }

6.SortedSet（有序集合）

1. public class ZSetTest extends RedisCommon {
2.  
3. public static void main(String[] args) throws InterruptedException {
4. log.info("-----------Starting Redis ZSet testing-----------");
5. ApplicationContext ctx = SpringApplication.run(ZSetTest.class, args);
6. StringRedisTemplate st = ctx.getBean(StringRedisTemplate.class);
7. String key = "ZSetKey";
8. Set<TypedTuple<String>> values = new HashSet<>();
9. for (int i = 0; i < 10; i++) {
10. TypedTuple<String> tuple = new DefaultTypedTuple<String>("value-"
11. + i, 12d + i);
12. values.add(tuple);
13. }
14. // log.info("SetKey add [" + st.opsForZSet().add(key, values) + "] values");
15. //st.opsForZSet().add(key, value, score)
16. //st.opsForZSet().incrementScore(key, value, delta)
17. log.info("SetKey has [" + st.opsForZSet().size(key) + "] values");
18.  
19. double start = 15d;
20. double end = 18d;
21. log.info("SetKey between " + start + " and " + end + " have " + st.opsForZSet().count(key, start, end));
22.  
23. long s = 1;
24. long e = 5;
25. log.info("SetKey range from " + s + " to " + e + " have " + st.opsForZSet().range(key, s, e));
26. //st.opsForZSet().rangeByScore(key, min, max, offset, count)
27. //st.opsForZSet().rangeByScoreWithScores(key, min, max)
28. //st.opsForZSet().rangeByScoreWithScores(key, min, max, offset, count)
29. //st.opsForZSet()
30.  
31. String member = "value-5";
32. log.info(member + "'s rank is " + st.opsForZSet().rank(key, member) + " in SetKey.");
33.  
34. log.info("Remove " + member + " from SetKey : " + st.opsForZSet().remove(key, member));
35.  
36. // st.opsForZSet().removeRange(key, start, end)
37. // st.opsForZSet().removeRangeByScore(key, min, max)
38. // st.opsForZSet().reverseRange(key, start, end)
39. // st.opsForZSet().reverseRangeByScore(key, min, max)
40. // st.opsForZSet().reverseRangeByScoreWithScores(key, min, max)
41. // st.opsForZSet().reverseRank(key, o)
42. // st.opsForZSet().unionAndStore(key, otherKeys, destKey)
43. // st.opsForZSet().unionAndStore(key, otherKey, destKey)
44. }
45.  
46. }

7.Pub/Sub（发布/订阅）

1. public class TopicTest extends RedisCommon {
2. private static String topicName = "Topic:chat";
3.  
4. @Bean
5. RedisMessageListenerContainer container(
6. RedisConnectionFactory connectionFactory,
7. MessageListenerAdapter listenerAdapter) {
8. RedisMessageListenerContainer container = new RedisMessageListenerContainer();
9. container.setConnectionFactory(connectionFactory);
10. container.addMessageListener(listenerAdapter, new PatternTopic(topicName));
11. //container.addMessageListener(listenerAdapter, new ChannelTopic(topicName));
12. return container;
13. }
14.  
15. @Bean
16. MessageListenerAdapter listenerAdapter(Receiver receiver) {
17. return new MessageListenerAdapter(receiver, "receiveMessage");
18. }
19.  
20. @Bean
21. Receiver receiver(@Value("Receiver-1") String name) {
22. return new Receiver(name);
23. }
24.  
25. public static void main(String[] args) throws InterruptedException {
26. log.info("-----------Starting Redis Topic testing-----------");
27. ApplicationContext ctx = SpringApplication.run(TopicTest.class, args);
28. StringRedisTemplate template = ctx.getBean(StringRedisTemplate.class);
29. template.convertAndSend(topicName, "Hello from Redis!");
30. }
31.  
32. static class Receiver {
33. private String name;
34.  
35. @Autowired
36. public Receiver(String name) {
37. this.name = name;
38. }
39.  
40. public void receiveMessage(String message) {
41. log.info(name + " received <" + message + ">");
42. }
43. }
44.  
45. }

 

源码请戳这里。