SpringMVC集成redis教程
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SpringMVC集成redis教程
强调内容:本教程已默认你的idea已配置好tomcat,jdk和maven等,如果没有配置或者不会,请自行先百度,配置好环境
强调内容:未避免配置文件出错,尽量文件名,包名都用我例子文件的名字,待你熟悉以后,在自行修改
1.使用开发工具
- 开发工具IDAE 2016.3.4
- spring.version–4.1.4.RELEASE
- maven–apache-maven-3.3.9
- tomcat–apache-tomcat-8.0.26
- redis版本–Redis 2.6.13
完成之后的项目目录结构截图:(图片不清楚可以选中图片,鼠标右键菜单,在新标签页中打开图片,即可查看大图。)
项目源代码打包:百度网盘 链接:http://pan.baidu.com/s/1c2xhAPa 密码:l4x9
或者移步这里下载:http://download.csdn.net/detail/u012775558/9804191?web=web
2.集成步骤
打开idea,新建工程,选择maven项目,选择sdk,勾选create from archetype,选择如图 maven-archetype-webapp,点击next:
输入GroupId和ArtifactID,点击next
勾选override,选择你的maven的settings.xml文件地址以及本地仓库地址,点击next。
输入项目名称和项目保存路径,其他默认,finish。
- 此时开始创建maven项目,等待右下角进度条走完,会自动帮我们创建一些包。
创建完毕,注意包结构(如果没有完成,观察控制台输出,看看卡在了哪个步奏,百度解决)
6. 编辑pom.xml文件。
文件内容如下,集成了Spring、log4j、jedis(java操作redis的包)、spring-data-redis(spring和redis集成的包)
<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/maven-v4_0_0.xsd"> <modelVersion>4.0.0</modelVersion> <groupId>redisTest</groupId> <artifactId>redisTest</artifactId> <packaging>war</packaging> <version>1.0-SNAPSHOT</version> <name>redisTest Maven Webapp</name> <url>http://maven.apache.org</url> <properties> <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding> <!-- spring版本号 --> <spring.version>4.1.4.RELEASE</spring.version> <!-- mybatis版本号 --> <mybatis.version>3.2.8</mybatis.version> <!-- log4j日志文件管理包版本 --> <slf4j.version>1.7.7</slf4j.version> <log4j.version>1.2.17</log4j.version> <!-- jackson包版本 --> <jackson.version>2.5.0</jackson.version> </properties> <dependencies> <!--单元测试依赖 --> <dependency> <groupId>junit</groupId> <artifactId>junit</artifactId> <version>4.11</version> <!-- 表示开发的时候引入,发布的时候不会加载此包 --> <scope>test</scope> </dependency> <!--spring单元测试依赖 --> <dependency> <groupId>org.springframework</groupId> <artifactId>spring-test</artifactId> <version>${spring.version}</version> <scope>test</scope> </dependency> <!-- springMVC核心包 --> <dependency> <groupId>org.springframework</groupId> <artifactId>spring-webmvc</artifactId> <version>${spring.version}</version> </dependency> <!-- spring核心包 --> <dependency> <groupId>org.springframework</groupId> <artifactId>spring-core</artifactId> <version>${spring.version}</version> </dependency> <dependency> <groupId>org.springframework</groupId> <artifactId>spring-beans</artifactId> <version>${spring.version}</version> </dependency> <dependency> <groupId>org.springframework</groupId> <artifactId>spring-context</artifactId> <version>${spring.version}</version> </dependency> <dependency> <groupId>org.springframework</groupId> <artifactId>spring-context-support</artifactId> <version>${spring.version}</version> </dependency> <dependency> <groupId>org.springframework</groupId> <artifactId>spring-tx</artifactId> <version>${spring.version}</version> </dependency> <dependency> <groupId>org.springframework</groupId> <artifactId>spring-web</artifactId> <version>${spring.version}</version> </dependency> <dependency> <groupId>org.springframework</groupId> <artifactId>spring-jdbc</artifactId> <version>${spring.version}</version> </dependency> <dependency> <groupId>javax.servlet</groupId> <artifactId>javax.servlet-api</artifactId> <version>3.0.1</version> <scope>provided</scope> </dependency> <dependency> <groupId>javax.servlet.jsp</groupId> <artifactId>jsp-api</artifactId> <version>2.2</version> <scope>provided</scope> </dependency> <dependency> <groupId>log4j</groupId> <artifactId>log4j</artifactId> <version>${log4j.version}</version> </dependency> <dependency> <groupId>org.springframework.data</groupId> <artifactId>spring-data-redis</artifactId> <version>1.0.2.RELEASE</version> </dependency> <dependency> <groupId>redis.clients</groupId> <artifactId>jedis</artifactId> <version>2.1.0</version> </dependency> </dependencies> <build> <finalName>redisTest</finalName> </build></project>
之后点击maven projects窗口刷新按钮,自动下载jar包,等到jar包加载完毕。这一步时间根据你的网络状况和本地仓库决定,可能时间会很久
7. 配置项目jdk。点击菜单栏file–project structure,依次选择project和modules,根据图示配置,我这里都选择了jdk1.8。
同时,在file-settings–build,Execution,Deployment–Compiler–java Compiler里也要设置为jdk1.8,如下图所示:
8. 此时包结构如图所示。手动在src/main下创建java文件夹,并将其设置为sources文件夹,此时该文件夹变为蓝色。
9. 编写java代码。先手动在java文件夹创建如图所示的包,并根据图片以及下文示例代码创建相应代码。
ViewController.java
package com.springmvc.controller;import com.springmvc.service.RedisCacheService;import org.apache.log4j.Logger;import org.springframework.beans.factory.annotation.Autowired;import org.springframework.stereotype.Controller;import org.springframework.web.bind.annotation.RequestMapping;@Controllerpublic class ViewController { private static final Logger logger = Logger.getLogger(ViewController.class); @Autowired private RedisCacheService redisCacheService; @RequestMapping("/view") public String view() { logger.info("你已通过springMVC进入controller方法"); logger.info("-------存储数据---------"); redisCacheService.putSessionObject("123","wwwwwww"); logger.info("-------读取数据---------"); redisCacheService.getsessionObject("123"); logger.info("-------删除数据---------"); redisCacheService.clearSessionObject("123"); logger.info("-------删除后再次读取数据---------"); redisCacheService.getsessionObject("123"); return "index"; }}
RedisCacheService.java
package com.springmvc.service;public interface RedisCacheService { /** * 根据id缓存数据。 参数说明:id和sessionObject不允许为null或空值。 数据库若已存在同名键,则会覆盖掉 ***/ public boolean putSessionObject(String id, Object sessionObject); /** * 根据id删除已缓存的数据。 参数说明:id不允许为null和空值 ***/ public boolean clearSessionObject(String id); /** * 根据id获取已缓存的缓存数据。 参数说明:id不允许为null和空值 ***/ public Object getsessionObject(String id);}
RedisCacheServiceImpl.java
package com.springmvc.service.impl;import org.apache.log4j.Logger;import org.springframework.beans.factory.annotation.Autowired;import org.springframework.stereotype.Service;import com.springmvc.dao.RedisCacheDao;import com.springmvc.service.RedisCacheService;@Servicepublic class RedisCacheServiceImpl implements RedisCacheService { private static final Logger logger = Logger .getLogger(RedisCacheServiceImpl.class); @Autowired private RedisCacheDao redisCacheDao; @Override public boolean putSessionObject(String id, Object sessionObject) { boolean flag = false; if (sessionObject != null && id != null && id.trim().length() > 0) { flag = redisCacheDao.saveObject(id, sessionObject); logger.info("数据缓存标志:" + flag); } else { logger.info("参数含空值或null,缓存失败" + flag); } return flag; } @Override public boolean clearSessionObject(String id) { boolean flag = false; if (id != null && id.trim().length() > 0) { flag = redisCacheDao.deleteKey(id); logger.info("缓存清空标志:" + flag); } else { logger.info("参数含空值或null,清空缓存失败"); } return flag; } @Override public Object getsessionObject(String id) { Object sessionObject = new Object(); if (id != null && id.trim().length() > 0) { sessionObject = redisCacheDao.getObject(id); } else { logger.info("参数含空值或null,获取缓存失败"); } return sessionObject; }}
RedisCacheDao.java
package com.springmvc.dao;/** * redis的dao层接口 * * @author Juveniless * * ***/public interface RedisCacheDao{ /** * 根据key存储object * * @param key 键 * @param value 要存储的对象Object * @return boolean 存储成功或失败的标志 * ***/ public abstract boolean saveObject(String key, Object value); /** * 根据key获取object * * @param key 键 * @return Object 与key对应的object * ***/ public abstract Object getObject(String key); /** * 根据key删除数据 * * @param key 键 * @return boolean 删除成功或失败的标志 * ***/ public abstract boolean deleteKey(String key);}
RedisCacheDaoImpl.java
package com.springmvc.dao.impl;import com.springmvc.dao.RedisCacheDao;import com.springmvc.utils.SerializeUtil;import org.apache.log4j.Logger;import org.springframework.dao.DataAccessException;import org.springframework.data.redis.connection.RedisConnection;import org.springframework.data.redis.core.RedisCallback;import org.springframework.data.redis.core.RedisTemplate;import org.springframework.stereotype.Repository;import javax.annotation.Resource;import java.io.Serializable;/** * redis的dao层实现 * * @author Juveniless * ***/@Repository("RedisCacheDao")public class RedisCacheDaoImpl implements RedisCacheDao { private static final Logger logger = Logger .getLogger(RedisCacheDaoImpl.class.getName()); static final byte[] ngHisByte = SerializeUtil.serialize("WANDA_NGHIS"); @Resource protected RedisTemplate<Serializable, Serializable> redisTemplate; /** * 根据key删除数据 * * @param key * 键 * @return boolean 删除成功或失败的标志 ***/ @Override public boolean deleteKey(final String key) { boolean result = redisTemplate.execute(new RedisCallback<Boolean>() { @Override public Boolean doInRedis(RedisConnection connection) throws DataAccessException { byte[] keyByte = SerializeUtil.serialize(key); Boolean flag = false; if (connection.hExists(ngHisByte, keyByte)) { logger.info("存在该键,执行删除"); flag = connection.hDel(ngHisByte, keyByte); } return flag; } }); return result; } /** * 根据key存储object * * @param key * 键 * @param value * 要存储的对象Object * @return boolean 存储成功或失败的标志 ***/ @Override public boolean saveObject(final String key, final Object value) { boolean result = redisTemplate.execute(new RedisCallback<Boolean>() { @Override public Boolean doInRedis(RedisConnection connection) throws DataAccessException { byte[] keyByte = SerializeUtil.serialize(key); byte[] valueByte = SerializeUtil.serialize(value); Boolean flag = false; if (connection.hExists(ngHisByte, keyByte)) { logger.info("数据已存在,先删除旧数据"); connection.hDel(ngHisByte, keyByte); } flag = connection.hSet(ngHisByte, keyByte, valueByte); return flag; } }); return result; } /** * 根据key获取object * * @param key * 键 * @return Object 与key对应的object ***/ @Override public Object getObject(final String key) { Object result = redisTemplate.execute(new RedisCallback<Object>() { @Override public Object doInRedis(RedisConnection connection) throws DataAccessException { Object returnObject = null; byte[] keyByte = SerializeUtil.serialize(key); if (connection.hExists(ngHisByte, keyByte)) { logger.info("数据存在--开始读取"); returnObject = SerializeUtil .unserialize(connection.hGet(ngHisByte, keyByte)); } else { logger.info("数据不存在"); } return returnObject; } }); return result; }}
SerializeUtil.java
package com.springmvc.utils;import org.apache.log4j.Logger;import java.io.*;/*** * 序列化和反序列化工具 * * @author Juveniless * ***/public class SerializeUtil{ private static final Logger logger = Logger.getLogger(SerializeUtil.class); /** * 序列化 * * @param object * @return */ public static byte[] serialize(Object object) { byte[] bytes = null; if (object != null) { ObjectOutputStream oos = null; ByteArrayOutputStream baos = null; try { // 序列化 baos = new ByteArrayOutputStream(); oos = new ObjectOutputStream(baos); oos.writeObject(object); bytes = baos.toByteArray(); } catch (Exception e) { e.printStackTrace(); logger.error("序列化出现异常:", e); } finally { close(oos); close(baos); } } return bytes; } /** * 反序列化 * * @param bytes * @return Object */ public static Object unserialize(byte[] bytes) { Object returnObject = new Object(); if (bytes != null) { ByteArrayInputStream bais = null; ObjectInputStream ois = null; try { // 反序列化 bais = new ByteArrayInputStream(bytes); ois = new ObjectInputStream(bais); returnObject = ois.readObject(); } catch (Exception e) { e.printStackTrace(); logger.error("反序列化出现异常:", e); } finally { close(bais); close(ois); } } else { returnObject = null; } return returnObject; } /** * 关闭io流对象 * * @param closeable */ public static void close(Closeable closeable) { if (closeable != null) { try { closeable.close(); } catch (Exception e) { e.printStackTrace(); logger.error("关闭io流对象出现异常:", e); } } }}
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10. 编写相关配置文件。application.properties、applicationContext.xml、log4j.properties、spring-servlet.xml、web.xml。
重点内容:注意相关配置文件的路径,前几个配置文件在resources文件夹,web.xml文件在webapp——WEB-INF文件夹
application.properties
# Redis settingsredis.host=127.0.0.1redis.port=6379redis.pass=redis.maxIdle=300redis.maxActive=600redis.maxWait=1000redis.testOnBorrow=true
applicationContext.xml
<?xml version="1.0" encoding="UTF-8"?><beans xmlns="http://www.springframework.org/schema/beans" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:aop="http://www.springframework.org/schema/aop" xmlns:context="http://www.springframework.org/schema/context" xmlns:tx="http://www.springframework.org/schema/tx" xmlns:util="http://www.springframework.org/schema/util" xmlns:p="http://www.springframework.org/schema/p" xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd http://www.springframework.org/schema/aop http://www.springframework.org/schema/aop/spring-aop-4.0.xsd http://www.springframework.org/schema/tx http://www.springframework.org/schema/tx/spring-tx-4.0.xsd http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context-4.0.xsd http://www.springframework.org/schema/util http://www.springframework.org/schema/util/spring-util-4.0.xsd "> <context:property-placeholder ignore-resource-not-found="true" location="classpath*:application.properties" /> <!-- redis缓存数据库的相关配置 --> <bean id="poolConfig" class="redis.clients.jedis.JedisPoolConfig"> <property name="maxIdle" value="${redis.maxIdle}" /> <property name="maxActive" value="${redis.maxActive}" /> <property name="maxWait" value="${redis.maxWait}" /> <property name="testOnBorrow" value="${redis.testOnBorrow}" /> </bean> <bean id="connectionFactory" class="org.springframework.data.redis.connection.jedis.JedisConnectionFactory" p:host-name="${redis.host}" p:port="${redis.port}" p:password="${redis.pass}" p:pool-config-ref="poolConfig" /> <bean id="redisTemplate" class="org.springframework.data.redis.core.StringRedisTemplate"> <property name="connectionFactory" ref="connectionFactory" /> </bean></beans>
log4j.properties
### direct log messages to stdout ###log4j.appender.stdout=org.apache.log4j.ConsoleAppenderlog4j.appender.stdout.Target=System.outlog4j.appender.stdout.layout=org.apache.log4j.PatternLayoutlog4j.appender.stdout.layout.ConversionPattern=%d{ABSOLUTE} %5p %c{1}:%L - %m%nlog4j.appender.ROLLING_FILE=org.apache.log4j.RollingFileAppenderlog4j.appender.ROLLING_FILE.Threshold=DEBUGlog4j.appender.ROLLING_FILE.File=patientView.loglog4j.appender.ROLLING_FILE.Append=truelog4j.appender.ROLLING_FILE.MaxFileSize=10240KBlog4j.appender.ROLLING_FILE.MaxBackupIndex=20log4j.appender.ROLLING_FILE.layout=org.apache.log4j.PatternLayoutlog4j.appender.ROLLING_FILE.layout.ConversionPattern=%d{ABSOLUTE} %5p %c{1}:%L - %m%nlog4j.rootLogger=info, stdout, ROLLING_FILE
spring-servlet.xml
<?xml version="1.0" encoding="UTF-8"?><beans xmlns="http://www.springframework.org/schema/beans" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:context="http://www.springframework.org/schema/context" xmlns:mvc="http://www.springframework.org/schema/mvc" xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-4.1.xsd http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context-4.1.xsd http://www.springframework.org/schema/mvc http://www.springframework.org/schema/mvc/spring-mvc-4.1.xsd"> <!-- 开启注解模式驱动 --> <mvc:annotation-driven></mvc:annotation-driven> <!-- 扫包 --> <context:component-scan base-package="com.springmvc.*"></context:component-scan> <!-- 静态资源过滤 --> <mvc:resources location="/resources/" mapping="/resources/**"/> <!-- 视图渲染 jsp/freemaker/velocity--> <bean class="org.springframework.web.servlet.view.InternalResourceViewResolver"> <!-- 制定页面存放的路径 --> <property name="prefix" value="/WEB-INF/page/"></property> <!-- 文件的后缀 --> <property name="suffix" value=".jsp"></property> </bean></beans>
web.xml
<?xml version="1.0" encoding="utf-8"?><web-app xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns="http://java.sun.com/xml/ns/javaee" xsi:schemaLocation="http://java.sun.com/xml/ns/javaee http://java.sun.com/xml/ns/javaee/web-app_3_0.xsd" version="3.0"> <display-name>Demo</display-name> <!-- Spring MVC 核心配置开始 --> <servlet> <servlet-name>SpringMvcDemo</servlet-name> <servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class> <!-- 可以通过contextConfigLocation来自定义SpringMVC配置文件的位置,如不指定,则默认在WEB-INF目录下,名称为[<servlet-name>]-servlet.xml, 此时文件名必须为[<servlet-name>]-servlet.xml,否则会出错--> <!--以下init-param是自定义SpringMVC的配置文件的位置 --> <init-param> <param-name>contextConfigLocation</param-name> <param-value>classpath:spring-servlet.xml</param-value> </init-param> <load-on-startup>1</load-on-startup> </servlet> <!-- 拦截设置 --> <servlet-mapping> <servlet-name>SpringMvcDemo</servlet-name> <!-- 此处可以可以配置成*.do,对应struts的后缀习惯 --> <url-pattern>/</url-pattern> </servlet-mapping> <!-- Spring MVC 核心配置结束 --> <!--配置监听器--> <!-- 读取Spring配置文件;applicationContext.xml --> <context-param> <param-name>contextConfigLocation</param-name> <!-- 如果是监听多个文件,可用‘,’隔开 --> <param-value>classpath:applicationContext.xml</param-value> </context-param> <!--Spring监听器 ApplicationContext 载入 --> <listener> <listener-class>org.springframework.web.context.ContextLoaderListener</listener-class> </listener> <!-- 读取LOG4J配置文件;log4j.properties --> <context-param> <param-name>log4jConfigLocation</param-name> <param-value>classpath:log4j.properties</param-value> </context-param> <!-- 定义LOG4J监听器 --> <listener> <listener-class> org.springframework.web.util.Log4jConfigListener </listener-class> </listener> <!-- Spring字符集过滤器 --> <filter> <filter-name>encoding</filter-name> <filter-class>org.springframework.web.filter.CharacterEncodingFilter</filter-class> <init-param> <param-name>encoding</param-name> <param-value>UTF-8</param-value> </init-param> </filter> <filter-mapping> <filter-name>encoding</filter-name> <url-pattern>/*</url-pattern> </filter-mapping></web-app>
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11. 在webapp–WEB-INF文件夹下创建page文件夹,用来存储jsp页面。在page文件夹下创建一个简单的jsp页面做测试用。如下图所示:
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12. 打开redis服务,我使用本机测试,因此ip为127.0.0.1。
在测试时,记得修改application.properties配置文件,修改redis数据库地址。
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13. 配置tomcat,运行项目。
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14. 浏览器地址栏输入:http://localhost:8080/view
控制台输出:
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