缓存支持：注解配置与EhCache使用

Chapter4-4-1/pom.xml

@@ -0,0 +1,70 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<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.didispace</groupId>
+	<artifactId>Chapter4-4-1</artifactId>
+	<version>1.0.0</version>
+	<packaging>jar</packaging>
+
+	<name>Chapter4-4-1</name>
+	<description>Spring Boot project</description>
+
+	<parent>
+		<groupId>org.springframework.boot</groupId>
+		<artifactId>spring-boot-starter-parent</artifactId>
+		<version>1.3.2.RELEASE</version>
+		<relativePath/> <!-- lookup parent from repository -->
+	</parent>
+
+	<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-test</artifactId>
+			<scope>test</scope>
+		</dependency>
+
+		<dependency>
+			<groupId>mysql</groupId>
+			<artifactId>mysql-connector-java</artifactId>
+			<version>5.1.21</version>
+		</dependency>
+
+		<dependency>
+			<groupId>org.springframework.boot</groupId>
+			<artifactId>spring-boot-starter-data-jpa</artifactId>
+		</dependency>
+
+		<dependency>
+			<groupId>org.springframework.boot</groupId>
+			<artifactId>spring-boot-starter-cache</artifactId>
+		</dependency>
+
+		<dependency>
+			<groupId>net.sf.ehcache</groupId>
+			<artifactId>ehcache</artifactId>
+		</dependency>
+
+	</dependencies>
+	
+	<build>
+		<plugins>
+			<plugin>
+				<groupId>org.springframework.boot</groupId>
+				<artifactId>spring-boot-maven-plugin</artifactId>
+			</plugin>
+		</plugins>
+	</build>
+
+</project>

Chapter4-4-1/src/main/java/com/didispace/Application.java

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+package com.didispace;
+
+import org.springframework.boot.SpringApplication;
+import org.springframework.boot.autoconfigure.SpringBootApplication;
+import org.springframework.cache.annotation.EnableCaching;
+
+/**
+ * @author 程序猿DD
+ * @version 1.0.0
+ * @date 16/3/23 下午2:34.
+ * @blog http://blog.didispace.com
+ */
+@SpringBootApplication
+@EnableCaching
+public class Application {
+
+	public static void main(String[] args) {
+		SpringApplication.run(Application.class, args);
+	}
+
+}

Chapter4-4-1/src/main/java/com/didispace/domain/User.java

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+package com.didispace.domain;
+
+import javax.persistence.Column;
+import javax.persistence.Entity;
+import javax.persistence.GeneratedValue;
+import javax.persistence.Id;
+
+/**
+ * @author 程序猿DD
+ * @version 1.0.0
+ * @date 16/3/21 下午3:35.
+ * @blog http://blog.didispace.com
+ */
+@Entity
+public class User {
+
+    @Id
+    @GeneratedValue
+    private Long id;
+
+    @Column(nullable = false)
+    private String name;
+
+    @Column(nullable = false)
+    private Integer age;
+
+    public User(){}
+
+    public User(String name, Integer age) {
+        this.name = name;
+        this.age = age;
+    }
+
+    public Long getId() {
+        return id;
+    }
+
+    public void setId(Long id) {
+        this.id = id;
+    }
+
+    public String getName() {
+        return name;
+    }
+
+    public void setName(String name) {
+        this.name = name;
+    }
+
+    public Integer getAge() {
+        return age;
+    }
+
+    public void setAge(Integer age) {
+        this.age = age;
+    }
+
+}

Chapter4-4-1/src/main/java/com/didispace/domain/UserRepository.java

@@ -0,0 +1,22 @@
+package com.didispace.domain;
+
+import org.springframework.cache.annotation.CacheConfig;
+import org.springframework.cache.annotation.CacheEvict;
+import org.springframework.cache.annotation.CachePut;
+import org.springframework.cache.annotation.Cacheable;
+import org.springframework.data.jpa.repository.JpaRepository;
+
+
+/**
+ * @author 程序猿DD
+ * @version 1.0.0
+ * @date 16/3/23 下午2:34.
+ * @blog http://blog.didispace.com
+ */
+@CacheConfig(cacheNames = "users")
+public interface UserRepository extends JpaRepository<User, Long> {
+
+    @Cacheable(key = "#p0", condition = "#p0.length() < 10")
+    User findByName(String name);
+
+}

Chapter4-4-1/src/main/resources/application.properties

@@ -0,0 +1,7 @@
+spring.datasource.url=jdbc:mysql://localhost:3306/test
+spring.datasource.username=root
+spring.datasource.password=123456
+spring.datasource.driver-class-name=com.mysql.jdbc.Driver
+
+spring.jpa.properties.hibernate.hbm2ddl.auto=create-drop
+spring.jpa.properties.hibernate.show_sql=true

Chapter4-4-1/src/main/resources/ehcache.xml

@@ -0,0 +1,9 @@
+<ehcache xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
+         xsi:noNamespaceSchemaLocation="ehcache.xsd">
+
+    <cache name="users"
+           maxEntriesLocalHeap="200"
+           timeToLiveSeconds="600">
+    </cache>
+
+</ehcache>

Chapter4-4-1/src/test/java/com/didispace/ApplicationTests.java

@@ -0,0 +1,51 @@
+package com.didispace;
+
+import com.didispace.domain.User;
+import com.didispace.domain.UserRepository;
+import org.junit.Before;
+import org.junit.Test;
+import org.junit.runner.RunWith;
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.boot.test.SpringApplicationConfiguration;
+import org.springframework.cache.CacheManager;
+import org.springframework.cache.ehcache.EhCacheCacheManager;
+import org.springframework.test.context.junit4.SpringJUnit4ClassRunner;
+
+/**
+ * @author 程序猿DD
+ * @version 1.0.0
+ * @date 16/3/23 下午2:34.
+ * @blog http://blog.didispace.com
+ */
+@RunWith(SpringJUnit4ClassRunner.class)
+@SpringApplicationConfiguration(Application.class)
+public class ApplicationTests {
+
+	@Autowired
+	private UserRepository userRepository;
+
+	@Autowired
+	private CacheManager cacheManager;
+
+	@Before
+	public void before() {
+		userRepository.save(new User("AAA", 10));
+	}
+
+	@Test
+	public void test() throws Exception {
+
+		User u1 = userRepository.findByName("AAA");
+		System.out.println("第一次查询：" + u1.getAge());
+
+		User u2 = userRepository.findByName("AAA");
+		System.out.println("第二次查询：" + u2.getAge());
+
+		u1.setAge(20);
+		userRepository.save(u1);
+		User u3 = userRepository.findByName("AAA");
+		System.out.println("第三次查询：" + u3.getAge());
+
+	}
+
+}