玩转spring boot——结合redis
一、准备工作
下载redis的windows版zip包：https://github.com/MSOpenTech/redis/releases
运行redis-server.exe程序
出现黑色窗口表示redis服务已启动。
二、与spring boot结合
参考官方例子：http://spring.io/guides/gs/messaging-redis/
修改pom.xml：
<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/xsd/maven-4.0.0.xsd"> <modelVersion>4.0.0</modelVersion> <groupId>com.github.carter659</groupId> <artifactId>spring08</artifactId> <version>0.0.1-SNAPSHOT</version> <packaging>jar</packaging> <parent> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter-parent</artifactId> <version>1.4.2.RELEASE</version> </parent> <name>spring08</name> <url>http://maven.apache.org</url> <properties> <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding> <java.version>1.8</java.version> </properties> <dependencies> <dependency> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter</artifactId> </dependency> <dependency> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter-redis</artifactId> </dependency> <dependency> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter-thymeleaf</artifactId> </dependency> <dependency> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-devtools</artifactId> <optional>true</optional> </dependency> </dependencies> <build> <plugins> <plugin> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-maven-plugin</artifactId> </plugin> </plugins> </build> </project>
修改入口类文件“App.java”：
package com.github.carter659.spring08; import org.springframework.boot.SpringApplication; import org.springframework.boot.autoconfigure.SpringBootApplication; import org.springframework.context.annotation.Bean; import org.springframework.data.redis.connection.RedisConnectionFactory; import org.springframework.data.redis.core.StringRedisTemplate; /** * 博客出处：http://www.cnblogs.com/GoodHelper/ * @author 刘冬 * */ @SpringBootApplication public class App { public static void main(String[] args) { SpringApplication.run(App.class, args); } @Bean StringRedisTemplate template(RedisConnectionFactory connectionFactory) { return new StringRedisTemplate(connectionFactory); } }
添加控制器“MainController.java”文件：
package com.github.carter659.spring08; import java.util.HashMap; import java.util.Map; import org.springframework.beans.factory.annotation.Autowired; import org.springframework.data.redis.core.StringRedisTemplate; import org.springframework.stereotype.Controller; import org.springframework.web.bind.annotation.GetMapping; import org.springframework.web.bind.annotation.PostMapping; import org.springframework.web.bind.annotation.ResponseBody; /** * 博客出处：http://www.cnblogs.com/GoodHelper/ * * @author 刘冬 * */ @Controller public class MainController { private static final String STR_REDIS_KEY = "key:name"; @Autowired private StringRedisTemplate redisTemplate; @GetMapping("/") public String index() { return "index"; } @PostMapping("/setString") public @ResponseBody Map<String, Object> setString(String value) { redisTemplate.opsForValue().set(STR_REDIS_KEY, value); Map<String, Object> map = new HashMap<>(); map.put("msg", "ok"); return map; } @PostMapping("/getString") public @ResponseBody Map<String, Object> getString() { String value = redisTemplate.opsForValue().get(STR_REDIS_KEY); Map<String, Object> map = new HashMap<>(); map.put("value", value); map.put("msg", "ok"); return map; } }
新建模板src/main/resources/templates/index.html：
<!DOCTYPE html> <html xmlns:th="http://www.thymeleaf.org"> <head> <meta http-equiv="Content-Type" content="text/html; charset=UTF-8" /> <title>玩转spring boot——结合redis</title> <script src="//cdn.bootcss.com/angular.js/1.5.6/angular.min.js"></script> <script type="text/javascript"> /*<![CDATA[*/ var app = angular.module('app', []); app.controller('MainController', function($rootScope, $scope, $http) { $scope.value = '刘冬'; //保存 $scope.setString = function() { $http({ url : '/setString?value=' + $scope.value, method : 'POST' }); } $scope.getString = function() { $http({ url : '/getString', method : 'POST' }).success(function(r) { $scope.result = JSON.stringify(r) }); } }); /*]]>*/ </script> </head> <body ng-app="app" ng-controller="MainController"> <h1>玩转spring boot——结合redis</h1> <h4> <a href="http://www.cnblogs.com/GoodHelper/">from 刘冬的博客</a> </h4> <input type="text" ng-model="value" /> <input type="button" value="设置" ng-click="setString()" /> <br /> <br /> <input type="button" value="获取" ng-click="getString()" /> <br /> <h3>结果：</h3> <p>{{result}}</p> <br /> <a href="http://www.cnblogs.com/GoodHelper/">点击访问原版博客</a> </body> </html>
运行效果：
点击获取，提示未空，再设置：
与redis的简单结合就实现了。
三、redis缓存集成
添加“Order.java”类文件：
package com.github.carter659.spring08;
import java.io.Serializable;
import java.util.Date;
/**
* 博客出处：http://www.cnblogs.com/GoodHelper/
*
* @author 刘冬
*
*/
public class Order implements Serializable {
/**
*
*/
private static final long serialVersionUID = 1L;
public String id;
public String no;
public Date date;
public int quantity;
/**
* 省略 get set
*/
}
注意，一定要实现“Serializable”接口。
新建“OrderDao.java”类文件：
package com.github.carter659.spring08; import java.util.Date; import org.springframework.cache.annotation.Cacheable; import org.springframework.stereotype.Component; /** * 博客出处：http://www.cnblogs.com/GoodHelper/ * * @author 刘冬 * */ @Component public class OrderDao { /** * 假设从数据库获取的订单数据 * * @param id * @return */ @Cacheable(value = "order", key = "'.id.'+#id") public Order get(String id) { Order order = new Order(); order.id = id; order.no = "No.00001"; order.date = new Date(); order.quantity = 100; return order; } }
在方法“public Order get(String id)”上加“@Cacheable”注解
此方法模拟数据库的查询，如果是第一次查询，返回当前时间（new Date()）。如果在缓存中查询，则时间是之前的。
控制器“MainController.java”增加“orderDao”字段和“get”方法：
@Autowired private OrderDao orderDao;
@PostMapping("/get")
public @ResponseBody Order get(@RequestParam String id) {
return orderDao.get(id);
}
在App类中加入启动缓存的注解“@EnableCaching”：
package com.github.carter659.spring08; import org.springframework.boot.SpringApplication; import org.springframework.boot.autoconfigure.SpringBootApplication; import org.springframework.cache.annotation.EnableCaching; import org.springframework.context.annotation.Bean; import org.springframework.data.redis.connection.RedisConnectionFactory; import org.springframework.data.redis.core.StringRedisTemplate; /** * 博客出处：http://www.cnblogs.com/GoodHelper/ * * @author 刘冬 * */ @SpringBootApplication @EnableCaching public class App { public static void main(String[] args) { SpringApplication.run(App.class, args); } @Bean StringRedisTemplate template(RedisConnectionFactory connectionFactory) { return new StringRedisTemplate(connectionFactory); } }
修改之前的index.html文件
<!DOCTYPE html> <html xmlns:th="http://www.thymeleaf.org"> <head> <meta http-equiv="Content-Type" content="text/html; charset=UTF-8" /> <title>玩转spring boot——结合redis</title> <script src="//cdn.bootcss.com/angular.js/1.5.6/angular.min.js"></script> <script type="text/javascript"> /*<![CDATA[*/ var app = angular.module('app', []); app.controller('MainController', function($rootScope, $scope, $http) { $scope.value = '刘冬'; $scope.id = '123456'; //保存 $scope.setString = function() { $http({ url : '/setString?value=' + $scope.value, method : 'POST' }); } $scope.getString = function() { $http({ url : '/getString', method : 'POST' }).success(function(r) { $scope.result = JSON.stringify(r) }); } $scope.getOrder = function() { $http({ url : '/get?id=' + $scope.id, method : 'POST' }).success(function(r) { $scope.result = JSON.stringify(r) }); } }); /*]]>*/ </script> </head> <body ng-app="app" ng-controller="MainController"> <h1>玩转spring boot——结合redis</h1> <h4> <a href="http://www.cnblogs.com/GoodHelper/">from 刘冬的博客</a> </h4> <input type="text" ng-model="value" /> <input type="button" value="设置" ng-click="setString()" /> <br /> <br /> <input type="button" value="获取" ng-click="getString()" /> <br /> <br /> <input type="text" ng-model="id" /> <br /> <input type="button" value="获取订单" ng-click="getOrder()" /> <br /> <br /> <h3>结果：</h3> <p>{{result}}</p> <br /> <a href="http://www.cnblogs.com/GoodHelper/">点击访问原版博客</a> </body> </html>
运行效果：
第一遍查询生成当前时间，之后再查询则时间不变
代码：https://github.com/carter659/spring-boot-08.git
如果你觉得我的博客对你有帮助，可以给我点儿打赏，左侧微信，右侧支付宝。
有可能就是你的一点打赏会让我的博客写的更好:)
玩转spring boot系列目录