使用Flyway来管理数据库版本

Chapter3-4-1/pom.xml

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+<?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>Chapter3-4-1</artifactId>
+	<version>1.0.0</version>
+	<packaging>jar</packaging>
+
+	<name>Chapter3-4-1</name>
+	<description>Spring Boot with JDBCTemplate</description>
+
+	<parent>
+		<groupId>org.springframework.boot</groupId>
+		<artifactId>spring-boot-starter-parent</artifactId>
+		<version>1.5.9.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-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-jdbc</artifactId>
+		</dependency>
+
+		<dependency>
+			<groupId>org.flywaydb</groupId>
+			<artifactId>flyway-core</artifactId>
+			<version>5.0.3</version>
+		</dependency>
+	</dependencies>
+	
+	<build>
+		<plugins>
+			<plugin>
+				<groupId>org.springframework.boot</groupId>
+				<artifactId>spring-boot-maven-plugin</artifactId>
+			</plugin>
+		</plugins>
+	</build>
+
+</project>

Chapter3-4-1/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;
+
+@SpringBootApplication
+public class Application {
+
+	public static void main(String[] args) {
+		SpringApplication.run(Application.class, args);
+	}
+
+}

Chapter3-4-1/src/main/java/com/didispace/service/UserService.java

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+package com.didispace.service;
+
+/**
+ * @author 程序猿DD
+ * @version 1.0.0
+ * @date 16/3/17 下午7:04.
+ * @blog http://blog.didispace.com
+ */
+public interface UserService {
+
+    /**
+     * 新增一个用户
+     * @param name
+     * @param age
+     */
+    void create(String name, Integer age);
+
+    /**
+     * 根据name删除一个用户高
+     * @param name
+     */
+    void deleteByName(String name);
+
+    /**
+     * 获取用户总量
+     */
+    Integer getAllUsers();
+
+    /**
+     * 删除所有用户
+     */
+    void deleteAllUsers();
+
+
+}

Chapter3-4-1/src/main/java/com/didispace/service/UserServiceImpl.java

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+package com.didispace.service;
+
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.jdbc.core.JdbcTemplate;
+import org.springframework.stereotype.Service;
+
+/**
+ * @author 程序猿DD
+ * @version 1.0.0
+ * @date 16/3/17 下午6:44.
+ * @blog http://blog.didispace.com
+ */
+@Service
+public class UserServiceImpl implements UserService {
+
+    @Autowired
+    private JdbcTemplate jdbcTemplate;
+
+    @Override
+    public void create(String name, Integer age) {
+        jdbcTemplate.update("insert into t_user(NAME, AGE) values(?, ?)", name, age);
+    }
+
+    @Override
+    public void deleteByName(String name) {
+        jdbcTemplate.update("delete from t_user where NAME = ?", name);
+    }
+
+    @Override
+    public Integer getAllUsers() {
+        return jdbcTemplate.queryForObject("select count(1) from t_user", Integer.class);
+    }
+
+    @Override
+    public void deleteAllUsers() {
+        jdbcTemplate.update("delete from t_user");
+    }
+}

Chapter3-4-1/src/main/resources/application.properties

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+spring.datasource.url=jdbc:mysql://localhost:3306/test
+spring.datasource.username=root
+spring.datasource.password=
+spring.datasource.driver-class-name=com.mysql.jdbc.Driver
+
+flyway.locations=classpath:/db

Chapter3-4-1/src/main/resources/db/V1__Base_version.sql

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+DROP TABLE IF EXISTS t_user ;
+
+
+CREATE TABLE `t_user` (
+  `id` bigint(20) NOT NULL AUTO_INCREMENT COMMENT '主键',
+  `name` varchar(20) NOT NULL COMMENT '姓名',
+  `age` int(5) DEFAULT NULL COMMENT '年龄',
+  PRIMARY KEY (`id`)
+) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4;

Chapter3-4-1/src/test/java/com/didispace/ApplicationTests.java

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+package com.didispace;
+
+import com.didispace.service.UserService;
+import org.junit.Assert;
+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.context.SpringBootTest;
+import org.springframework.test.context.junit4.SpringJUnit4ClassRunner;
+
+
+@RunWith(SpringJUnit4ClassRunner.class)
+@SpringBootTest
+public class ApplicationTests {
+
+	@Autowired
+	private UserService userSerivce;
+
+	@Before
+	public void setUp() {
+		// 准备，清空user表
+		userSerivce.deleteAllUsers();
+	}
+
+	@Test
+	public void test() throws Exception {
+		// 插入5个用户
+		userSerivce.create("a", 1);
+		userSerivce.create("b", 2);
+		userSerivce.create("c", 3);
+		userSerivce.create("d", 4);
+		userSerivce.create("e", 5);
+
+		// 查数据库，应该有5个用户
+		Assert.assertEquals(5, userSerivce.getAllUsers().intValue());
+
+		// 删除两个用户
+		userSerivce.deleteByName("a");
+		userSerivce.deleteByName("e");
+
+		// 查数据库，应该有5个用户
+		Assert.assertEquals(3, userSerivce.getAllUsers().intValue());
+
+	}
+
+
+}