springmvc+mybatis+redis（转）

最近在学习redis的使用方法，它的本地使用方法比较简单，只需要先启动Redis服务器，然后运行测试代码即可。但是现在我想要在网站上访问数据库的时候采用Redis缓存，问题就出来了。要么是缓存直接失效，每次都是直接访问数据库，要么就是出错。在网上看了很久发现一个靠谱的方法，和大家分享一下。

redis相关类是采用注解的形式，因此首先扫描注解类

1. <!-- class annotation related... start -->
2. <context:component-scan base-package="com.defonds.bdp.*.service" />
3. <context:component-scan base-package="com.defonds.bdp.cache.redis" />
4. <!-- class annotation related... end -->
5. <context:annotation-config />

缓存工具类如下：

1. /**
2. * File Name：RedisCacheConfig.java
3. *
4. * Copyright Defonds Corporation 2015
5. * All Rights Reserved
6. *
7. */
8. package com.defonds.bdp.cache.redis;
9. import org.springframework.cache.CacheManager;
10. import org.springframework.cache.annotation.CachingConfigurerSupport;
11. import org.springframework.cache.annotation.EnableCaching;
12. import org.springframework.cache.interceptor.KeyGenerator;
13. import org.springframework.context.annotation.Bean;
14. import org.springframework.context.annotation.Configuration;
15. import org.springframework.data.redis.cache.RedisCacheManager;
16. import org.springframework.data.redis.connection.RedisConnectionFactory;
17. import org.springframework.data.redis.connection.jedis.JedisConnectionFactory;
18. import org.springframework.data.redis.core.RedisTemplate;
19. import java.lang.reflect.Method;
20. /**
21. *
22. * Project Name：bdp
23. * Type Name：RedisCacheConfig
24. * Type Description：
25. *  Author：Defonds
26. * Create Date：2015-09-21
27. *
28. * @version
29. *
30. */
31. @Configuration
32. @EnableCaching
33. public class RedisCacheConfig extends CachingConfigurerSupport {
34. @Bean
35. public JedisConnectionFactory redisConnectionFactory() {
36. JedisConnectionFactory redisConnectionFactory = new JedisConnectionFactory();
37. // Defaults
38. redisConnectionFactory.setHostName("127.0.0.1");
39. redisConnectionFactory.setPort(6379);
40. return redisConnectionFactory;
41. }
42. @Bean
43. public RedisTemplate<String, String> redisTemplate(RedisConnectionFactory cf) {
44. RedisTemplate<String, String> redisTemplate = new RedisTemplate<String, String>();
45. redisTemplate.setConnectionFactory(cf);
46. return redisTemplate;
47. }
48. @Bean
49. public CacheManager cacheManager(RedisTemplate redisTemplate) {
50. RedisCacheManager cacheManager = new RedisCacheManager(redisTemplate);
51. // Number of seconds before expiration. Defaults to unlimited (0)
52. cacheManager.setDefaultExpiration(3000); // Sets the default expire time (in seconds)
53. return cacheManager;
54. }
55. @Bean
56. public KeyGenerator customKeyGenerator() {
57. return new KeyGenerator() {
58. public Object generate(Object o, Method method, Object... objects) {
59. StringBuilder sb = new StringBuilder();
60. sb.append(o.getClass().getName());
61. sb.append(method.getName());
62. for (Object obj : objects) {
63. sb.append(obj.toString());
64. }
65. return sb.toString();
66. }
67. };
68. }
69. }

缓存的使用是在service层，在方法上使用注解，调用缓存

1. /**
2. * File Name：CityService.java
3. *
4. * Copyright Defonds Corporation 2015
5. * All Rights Reserved
6. *
7. */
8. package com.defonds.bdp.city.service;
9. import java.util.List;
10. import org.apache.commons.logging.Log;
11. import org.apache.commons.logging.LogFactory;
12. import org.springframework.beans.factory.annotation.Autowired;
13. import org.springframework.cache.annotation.CacheEvict;
14. import org.springframework.cache.annotation.Cacheable;
15. import org.springframework.stereotype.Service;
16. import org.springframework.transaction.annotation.Propagation;
17. import org.springframework.transaction.annotation.Transactional;
18. import com.defonds.bdp.city.bean.City;
19. import com.defonds.bdp.city.mapper.CityMapper;
20. /**
21. *
22. * Project Name：bdp
23. * Type Name：CityService
24. * Type Description：
25. * Author：Defonds
26. * Create Date：2015-08-31
27. * @version
28. *
29. */
30. @Service
31. @Transactional(propagation=Propagation.REQUIRED, rollbackFor=Exception.class)
32. public class CityService {
33. private final Log logger = LogFactory.getLog(this.getClass());
34. @Autowired
35. private CityMapper cityMapper;
36. // C
37. @CacheEvict(value = { "provinceCities"}, allEntries = true)
38. public void insertCity(String city_code, String city_jb,
39. String province_code, String city_name,
40. String city, String province) {
41. City cityBean = new City();
42. cityBean.setCityCode(city_code);
43. cityBean.setCityJb(city_jb);
44. cityBean.setProvinceCode(province_code);
45. cityBean.setCityName(city_name);
46. cityBean.setCity(city);
47. cityBean.setProvince(province);
48. this.cityMapper.insertCity(cityBean);
49. }
50. // R
51. @Cacheable("provinceCities")
52. public List<City> provinceCities(String province) {
53. logger.debug("province=" + province);
54. return this.cityMapper.provinceCities(province);
55. }
56. // R
57. @Cacheable("searchCity")
58. public City searchCity(String city_code){
59. logger.debug("city_code=" + city_code);
60. return this.cityMapper.searchCity(city_code);
61. }
62. // U
63. @CacheEvict(value = { "provinceCities", "searchCity" }, allEntries = true)
64. public int renameCity(String city_code, String city_name) {
65. City city = new City();
66. city.setCityCode(city_code);
67. city.setCityName(city_name);
68. this.cityMapper.renameCity(city);
69. return 1;
70. }
71. // D
72. @CacheEvict(value = { "provinceCities", "searchCity" }, allEntries = true)
73. public int deleteCity(String city_code) {
74. this.cityMapper.deleteCity(city_code);
75. return 1;
76. }
77. }

maven项目，增加redis的jar包

1. <project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
2. xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/maven-v4_0_0.xsd">
3. <modelVersion>4.0.0</modelVersion>
4. <groupId>com</groupId>
5. <artifactId>redisdemo01</artifactId>
6. <packaging>war</packaging>
7. <version>0.0.1-SNAPSHOT</version>
8. <name>redisdemo01 Maven Webapp</name>
9. <url>http://maven.apache.org</url>
10. <properties>
11. <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
12. <spring.version>4.1.4.RELEASE</spring.version>
13. <jackson.version>2.5.0</jackson.version>
14. </properties>
15. <dependencies>
16. <dependency>
17. <groupId>junit</groupId>
18. <artifactId>junit</artifactId>
19. <version>4.12</version>
20. <scope>test</scope>
21. </dependency>
22. <!-- spring -->
23. <dependency>
24. <groupId>org.springframework</groupId>
25. <artifactId>spring-core</artifactId>
26. <version>${spring.version}</version>
27. </dependency>
28. <dependency>
29. <groupId>org.springframework</groupId>
30. <artifactId>spring-beans</artifactId>
31. <version>${spring.version}</version>
32. </dependency>
33. <dependency>
34. <groupId>org.springframework</groupId>
35. <artifactId>spring-context</artifactId>
36. <version>${spring.version}</version>
37. </dependency>
38. <dependency>
39. <groupId>org.springframework</groupId>
40. <artifactId>spring-tx</artifactId>
41. <version>${spring.version}</version>
42. </dependency>
43. <dependency>
44. <groupId>org.springframework</groupId>
45. <artifactId>spring-web</artifactId>
46. <version>${spring.version}</version>
47. </dependency>
48. <dependency>
49. <groupId>org.springframework</groupId>
50. <artifactId>spring-webmvc</artifactId>
51. <version>${spring.version}</version>
52. </dependency>
53. <dependency>
54. <groupId>org.springframework</groupId>
55. <artifactId>spring-jdbc</artifactId>
56. <version>${spring.version}</version>
57. </dependency>
58. <dependency>
59. <groupId>org.springframework</groupId>
60. <artifactId>spring-test</artifactId>
61. <version>${spring.version}</version>
62. <scope>test</scope>
63. </dependency>
64. <!-- mybatis 包 -->
65. <dependency>
66. <groupId>org.mybatis</groupId>
67. <artifactId>mybatis</artifactId>
68. <version>3.2.8</version>
69. </dependency>
70. <!--mybatis spring 插件 -->
71. <dependency>
72. <groupId>org.mybatis</groupId>
73. <artifactId>mybatis-spring</artifactId>
74. <version>1.2.2</version>
75. </dependency>
76. <!-- mysql连接 -->
77. <dependency>
78. <groupId>mysql</groupId>
79. <artifactId>mysql-connector-java</artifactId>
80. <version>5.1.34</version>
81. </dependency>
82. <!-- 数据源 -->
83. <dependency>
84. <groupId>com.alibaba</groupId>
85. <artifactId>druid</artifactId>
86. <version>1.0.12</version>
87. </dependency>
88. <dependency>
89. <groupId>c3p0</groupId>
90. <artifactId>c3p0</artifactId>
91. <version>0.9.1.2</version>
92. </dependency>
93. <dependency>
94. <groupId>org.aspectj</groupId>
95. <artifactId>aspectjweaver</artifactId>
96. <version>1.8.4</version>
97. </dependency>
98. <!-- log4j -->
99. <dependency>
100. <groupId>log4j</groupId>
101. <artifactId>log4j</artifactId>
102. <version>1.2.17</version>
103. </dependency>
104. <!-- servlet -->
105. <dependency>
106. <groupId>javax.servlet</groupId>
107. <artifactId>servlet-api</artifactId>
108. <version>3.0-alpha-1</version>
109. </dependency>
110. <dependency>
111. <groupId>javax.servlet</groupId>
112. <artifactId>jstl</artifactId>
113. <version>1.2</version>
114. </dependency>
115. <!-- json -->
116. <dependency>
117. <groupId>org.codehaus.jackson</groupId>
118. <artifactId>jackson-mapper-asl</artifactId>
119. <version>1.9.13</version>
120. </dependency>
121. <dependency>
122. <groupId>com.alibaba</groupId>
123. <artifactId>fastjson</artifactId>
124. <version>1.2.3</version>
125. </dependency>
126. <dependency>
127. <groupId>com.fasterxml.jackson.core</groupId>
128. <artifactId>jackson-annotations</artifactId>
129. <version>${jackson.version}</version>
130. </dependency>
131. <dependency>
132. <groupId>com.fasterxml.jackson.core</groupId>
133. <artifactId>jackson-core</artifactId>
134. <version>${jackson.version}</version>
135. </dependency>
136. <dependency>
137. <groupId>com.fasterxml.jackson.core</groupId>
138. <artifactId>jackson-databind</artifactId>
139. <version>${jackson.version}</version>
140. </dependency>
141. <!-- 文件上传 -->
142. <dependency>
143. <groupId>commons-io</groupId>
144. <artifactId>commons-io</artifactId>
145. <version>2.4</version>
146. </dependency>
147. <dependency>
148. <groupId>commons-fileupload</groupId>
149. <artifactId>commons-fileupload</artifactId>
150. <version>1.2.2</version>
151. </dependency>
152. <!-- 队列 -->
153. <dependency>
154. <groupId>com.rabbitmq</groupId>
155. <artifactId>amqp-client</artifactId>
156. <version>3.4.1</version>
157. </dependency>
158. <dependency>
159. <groupId>org.slf4j</groupId>
160. <artifactId>slf4j-log4j12</artifactId>
161. <version>1.7.7</version>
162. </dependency>
163. <dependency>
164. <groupId>org.apache.commons</groupId>
165. <artifactId>commons-lang3</artifactId>
166. <version>3.3.2</version>
167. </dependency>
168. <dependency>
169. <groupId>org.springframework.amqp</groupId>
170. <artifactId>spring-rabbit</artifactId>
171. <version>1.4.0.RELEASE</version>
172. </dependency>
173. <!-- 缓存 -->
174. <dependency>
175. <groupId>redis.clients</groupId>
176. <artifactId>jedis</artifactId>
177. <version>2.6.0</version>
178. </dependency>
179. <dependency>
180. <groupId>org.springframework.data</groupId>
181. <artifactId>spring-data-redis</artifactId>
182. <version>1.6.0.RELEASE</version>
183. </dependency>
184. </dependencies>
185. <build>
186. <finalName>redisdemo01</finalName>
187. </build>
188. </project>

web.xml不变

1. <!DOCTYPE web-app PUBLIC
2. "-//Sun Microsystems, Inc.//DTD Web Application 2.3//EN"
3. "http://java.sun.com/dtd/web-app_2_3.dtd" >
4. <web-app>
5. <display-name>Archetype Created Web Application</display-name>
6. <filter>
7. <filter-name>encodingFilter</filter-name>
8. <filter-class>
9. org.springframework.web.filter.CharacterEncodingFilter
10. </filter-class>
11. <init-param>
12. <param-name>encoding</param-name>
13. <param-value>UTF-8</param-value>
14. </init-param>
15. <init-param>
16. <param-name>forceEncoding</param-name>
17. <param-value>true</param-value>
18. </init-param>
19. </filter>
20. <filter-mapping>
21. <filter-name>encodingFilter</filter-name>
22. <url-pattern>/*</url-pattern>
23. </filter-mapping>
24. <!-- 除了加过滤器，由于tomcat默认编码ISO-8859-1，还需要修改 %tomcat%/conf/server.xml Connector 标签加属性 URIEncoding="UTF-8" -->
25. <!-- character encoding related.....end -->
26. <context-param>
27. <param-name>contextConfigLocation</param-name>
28. <param-value>/WEB-INF/classes/*-applicationContext.xml</param-value>
29. </context-param>
30. <listener>
31. <listener-class>org.springframework.web.context.ContextLoaderListener</listener-class>
32. </listener>
33. <servlet>
34. <servlet-name>bdpmvc</servlet-name>
35. <servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>
36. <init-param>
37. <param-name>contextConfigLocation</param-name>
38. <param-value>/WEB-INF/classes/*-servlet.xml</param-value>
39. </init-param>
40. <load-on-startup>1</load-on-startup>
41. </servlet>
42. <servlet-mapping>
43. <servlet-name>bdpmvc</servlet-name>
44. <url-pattern>/</url-pattern>
45. <!-- <url-pattern>*.json</url-pattern>
46. <url-pattern>*.html</url-pattern> -->
47. </servlet-mapping>
48. </web-app>

http://blog.csdn.net/u010627840/article/details/50593659