springCloud分布式事务实战编写第二个微服务

Posted 2021-01-16

（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br/>@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 {br/>@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 br/>@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br/>@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