springCloud分布式事务实战（六）编写第二个微服务

（1）创建工程

（2）添加 jar pom.xml 添加:springboot 父， mysql连接，(mybatis， spring-mybatis springboot ,阿里连接池) , 服务中心客户端。

<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.jh</groupId>
	<artifactId>BlockMicroService</artifactId>
	<version>0.0.1-SNAPSHOT</version>
	<packaging>jar</packaging>

	<name>BlockMicroService</name>
	<url>http://maven.apache.org</url>
	<!-- 1 spring boot parent -->
	<parent>
		<groupId>org.springframework.boot</groupId>
		<artifactId>spring-boot-starter-parent</artifactId>
		<version>1.4.3.RELEASE</version>
		<relativePath />
	</parent>

	<!--1 属性 -->
	<properties>
		<project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
		<project.reporting.outputEncoding>UTF-8</project.reporting.outputEncoding>
		<java.version>1.7</java.version>
		<maven.compile.source>1.7</maven.compile.source>
		<maven.compile.target>1.7</maven.compile.target>
		<spring-cloud.version>Dalston.SR1</spring-cloud.version>
		<lcn.last.version>4.1.0</lcn.last.version>
	</properties>

	<dependencies>
		<!--2 mysql -->
		<dependency>
			<groupId>mysql</groupId>
			<artifactId>mysql-connector-java</artifactId>
			<version>5.1.43</version>
		</dependency>

		<!-- 3 包括mybatis,mybatis-spring,spring boot,spring 等 -->
		<dependency>
			<groupId>org.mybatis.spring.boot</groupId>
			<artifactId>mybatis-spring-boot-starter</artifactId>
			<version>1.1.1</version>
		</dependency>

		<!--4  注册中心 -->
	
		<dependency>
			<groupId>org.springframework.cloud</groupId>
			<artifactId>spring-cloud-starter-eureka</artifactId>
		</dependency>
		
		<!-- 5 连接池 -->
		<dependency>
			<groupId>com.alibaba</groupId>
			<artifactId>druid</artifactId>
			<version>1.0.19</version>
		</dependency>
		</dependencies>

	<!-- spring cloud 依赖版本 -->
	<dependencyManagement>
		<dependencies>
			<dependency>
				<groupId>org.springframework.cloud</groupId>
				<artifactId>spring-cloud-dependencies</artifactId>
				<version>Dalston.SR3</version>
				<type>pom</type>
				<scope>import</scope>
			</dependency>
		</dependencies>
	</dependencyManagement>
</project>

（3）编写配置文件Application.properties

配置发布服务名，端口；配置中心地址；连接mysql 参数

#1 register server 
#服务名
spring.application.name =themeMicroService
#服务端口
server.port =8021
#注册中心地址
eureka.client.service-url.defaultZone=http://127.0.0.1:8001/eureka

spring.datasource.driver-class-name =com.mysql.jdbc.Driver
spring.datasource.url=jdbc:mysql://localhost:3306/forum2?useUnicode=true&characterEncoding=utf8&autoReconnect=true&failOverReadOnly=false
spring.datasource.username= root
spring.datasource.password=
spring.datasource.initialize =true
init-db= true
logging.level.com.codingapi=debug

（4）编写实体，dao和映射。 实体：

public class Theme {
private  Integer id;
private  String  tName;
private  String  tDescription;
get set 
}

Dao 和映射

@Mapper
public interface ThemeDao {

	/**
	 * 查询
	 * 
	 * @return
	 */
	@Select(value = "select *  from theme")
	public List<Theme> getThemeList();

	/**
	 * 插入
	 * 
	 * @param bname
	 * @param bDescription
	 * @return
	 */

	@Insert(value = "insert  into theme(tName,tDescription,blockId)" + " values(#{tName},#{tDescription},"
			+ "#{blockId})")
	public int saveTheme(@Param("tName") String tName, @Param("tDescription") String tDescription,  @Param("blockId")  Integer blockId);
	
}

（5）编写服务层

服务接口

public interface ThemeService {

List<Theme> getThemeList();
int saveTheme(String tName, String  tDescription , Integer blockId);

} 服务实现：

package com.jh.service.impl;


@Service
public class ThemeServiceImpl implements ThemeService {
	@Autowired
	private ThemeDao themeDao;

	@Override
	public List<Theme> getThemeList() {
		return themeDao.getThemeList();
	}
	@Override
	public int saveTheme(String tName, String tDescription, Integer blockId) {
		// TODO Auto-generated method stub
		int rs1 = themeDao.saveTheme(tName, tDescription, blockId);// 保存1
		return rs1;

	}

}

（6）编写控制层

@RestController
public class ThemeController {

	@Autowired
	private ThemeService themeService;// 块服务，第一个服务

	// 1接受请求
	@RequestMapping(value = "/getThemeList", method = RequestMethod.GET)
	public List<Theme> getThemeList() {
		List<Theme> ThemeList = themeService.getThemeList();
		return ThemeList;
	}

	@RequestMapping(value = "/saveTheme", method = RequestMethod.GET)
	public  int saveTheme() {
		Integer result = themeService.saveTheme("jwg2", "jwg2", 1);	
	return   result 
	}
}

（7） 编写主程序 开启springboot应用程序，注册中心客户端，mybatis扫描和定义一个数据源 package com.jh;

@SpringBootApplication  //spring boot应用程序
@EnableEurekaClient
@MapperScan("com.jh.dao")
public class ThemeMicroService {
	public static void main(String[] args) {
		
		SpringApplication.run(ThemeMicroService.class, args);
	}

	//1环境
    @Autowired
	private Environment env;

	@Bean
	public DataSource dataSource() {
		DruidDataSource dataSource = new DruidDataSource();
		
		dataSource.setUrl(env.getProperty("spring.datasource.url"));
		dataSource.setUsername(env.getProperty("spring.datasource.username"));//用户名
		dataSource.setPassword(env.getProperty("spring.datasource.password"));//密码
		dataSource.setInitialSize(10);
		dataSource.setMaxActive(50);
		dataSource.setMinIdle(1);
		dataSource.setMaxWait(60000);
		dataSource.setValidationQuery("SELECT 1");
		dataSource.setTestOnBorrow(false);
		dataSource.setTestWhileIdle(true);
		dataSource.setPoolPreparedStatements(false);
		return dataSource;		
	}
}

（8）测试 启动注册中心，启动微服务 然后启动浏览器