SpringCloud入门 - 业务模块搭建（二）
SpringCloud入门 - 业务模块搭建
1. 需求
搭建业务模块，实现Emp员工信息操作
2. 工程结构示意
模块总览
3. 父工程
3.1 创建maven项目
3.2 pom配置
<parent>
<groupId>org.springframework.bootgroupId>
<artifactId>spring-boot-starter-parentartifactId>
<version>2.0.8.RELEASEversion>
<relativePath />
parent>
<properties>
<project.build.sourceEncoding>UTF-8project.build.sourceEncoding>
<project.reporting.outputEncoding>UTF-8project.reporting.outputEncoding>
<java.version>1.8java.version>
properties>
<dependencyManagement>
<dependencies>
<dependency>
<groupId>org.springframework.cloudgroupId>
<artifactId>spring-cloud-dependenciesartifactId>
<version>Finchley.SR2version>
<type>pomtype>
<scope>importscope>
dependency>
dependencies>
dependencyManagement>
<dependencies>
<dependency>
<groupId>org.springframework.bootgroupId>
<artifactId>spring-boot-starterartifactId>
dependency>
<dependency>
<groupId>org.springframework.cloudgroupId>
<artifactId>spring-cloud-starter-configartifactId>
dependency>
<dependency>
<groupId>org.springframework.bootgroupId>
<artifactId>spring-boot-starter-testartifactId>
<scope>testscope>
dependency>
<dependency>
<groupId>org.springframeworkgroupId>
<artifactId>springloadedartifactId>
<version>1.2.8.RELEASEversion>
dependency>
<dependency>
<groupId>org.springframework.bootgroupId>
<artifactId>spring-boot-devtoolsartifactId>
dependency>
dependencies>
4. 公共模块构建
4.1 New Maven Project
创建maven项目emall-api，该项目无需继承刚刚创建的父项目
4.2 pom配置
<dependencies>
<dependency>
<groupId>org.projectlombokgroupId>
<artifactId>lombokartifactId>
dependency>
dependencies>
4.3 创建员工Entity
@SuppressWarnings("serial")
@NoArgsConstructor
@Data
@Accessors(chain=true)//开启链式风格
public class Emp implements Serializable{
private Integer empNo;
private String name;
private String sex;
private Integer age;
private Double sal;
private String dbSource;
}
5. 员工模块服务提供者构建
5.1 New Maven Module
创建后观察下父工程的pom内容。
5.2 pom配置
<dependencies>
<dependency>
<groupId>com.kgcgroupId>
<artifactId>emall-apiartifactId>
<version>0.0.1-SNAPSHOTversion>
dependency>
<dependency>
<groupId>com.alibabagroupId>
<artifactId>druidartifactId>
<version>1.1.10version>
dependency>
<dependency>
<groupId>mysqlgroupId>
<artifactId>mysql-connector-javaartifactId>
<scope>runtimescope>
dependency>
<dependency>
<groupId>org.mybatis.spring.bootgroupId>
<artifactId>mybatis-spring-boot-starterartifactId>
<version>1.3.0version>
dependency>
<dependency>
<groupId>org.springframework.bootgroupId>
<artifactId>spring-boot-starter-jettyartifactId>
dependency>
<dependency>
<groupId>org.springframework.bootgroupId>
<artifactId>spring-boot-starter-webartifactId>
<exclusions>
<exclusion>
<groupId>org.springframework.bootgroupId>
<artifactId>spring-boot-starter-tomcatartifactId>
exclusion>
exclusions>
dependency>
dependencies>
（可以把依赖的版本号放到父项目中的dependencyManagement统一管理）
5.3 application.yml配置
在resource目录下新建application.yml并编辑yml内容
server:
port: 8001 #服务端口
spring:
application:
name: emall-emp-provider #服务名
datasource:
type: com.alibaba.druid.pool.DruidDataSource #数据源操作类型
driver-class-name: com.mysql.jdbc.Driver #mysql驱动类
url: jdbc:mysql://localhost:3306/empdb01 #数据库名称
username: root #数据库连接用户
password: 123456 #数据库连接密码
dbcp2:
initial-size: 5 #连接池初始化连接数
min-idle: 5 #连接池最少连接数
max-idle: 5 #连接池最大连接数
max-wait-millis: 300 #连接最大等待超时时间
# mybatis整合
mybatis:
config-location: classpath:mybatis/mybatis.cfg.xml #mybatis配置文件的位置
type-aliases-package: com.emall.entities #为Entity包配置别名
mapper-locations:
- classpath:mybatis/mapper/**/*.xml #mapper映射文件的位置
5.4 mybatis.cfg.xml配置
- 新建mybatis.cfg.xml，注意路径和文件名和上面yml中定义保持一致
- 编辑内容，主要是配置二级缓存（如果不开启二级缓存，这个文件可以省略）
<configuration>
<settings>
<setting name="cacheEnabled" value="true" />
settings>
configuration>
5.5 建库建表
DROP DATABASE IF EXISTS empdb01;
CREATE DATABASE empdb01 CHARACTER SET UTF8;
USE empdb01;
CREATE TABLE emp
(
emp_no BIGINT NOT NULL PRIMARY KEY AUTO_INCREMENT,
NAME VARCHAR(60),
sex VARCHAR(2),
age INT(3),
sal DECIMAL(17),
db_source VARCHAR(60)
);
INSERT INTO emp(NAME,sex,age,sal,db_source) VALUES('张三疯','M',99,9999,DATABASE());
INSERT INTO emp(NAME,sex,age,sal,db_source) VALUES('李四疯','F',18,2800,DATABASE());
INSERT INTO emp(NAME,sex,age,sal,db_source) VALUES('王五疯','M',23,3500,DATABASE());
INSERT INTO emp(NAME,sex,age,sal,db_source) VALUES('赵六疯','M',30,6500,DATABASE());
5.6 DAO编码
- 新建DAO
@Mapper
public interface EmpDao {
public List<Emp> getAll();
public boolean addEmp(Emp emp);
public Emp getEmpById(Integer id);
public boolean delEmp(Integer id);
}
- 新建EmpMapper.xml，文件路径需和yml的配置保持一致
<mapper namespace="com.emall.dao.EmpDao">
<select id="getAll" resultType="Emp">
SELECT
emp_no empNo,
NAME,
sex,
age,
sal,
db_source dbSource
FROM emp
select>
<insert id="addEmp" parameterType="Emp">
INSERT INTO emp(name,sex,age,sal,db_source)
VALUES(#{name},#{sex},#{age},#{dbSource},DATABASE());
insert>
<select id="getEmpById" resultType="Emp" parameterType="Integer">
SELECT
emp_no empNo,
NAME,
sex,
age,
sal,
db_source dbSource
FROM emp
WHERE emp_no = #{empNo}
select>
<delete id="delEmp" parameterType="Integer">
DELETE FROM emp
WHERE emp_no = #{empNo}
delete>
mapper>
5.7 Service编码
public interface EmpService {
public List<Emp> getAll();
public boolean addEmp(Emp emp);
public Emp getEmpById(Integer id);
public boolean delEmp(Integer id);
}
@Service
public class EmpServiceImpl implements EmpService{
@Autowired
private EmpDao dao;
@Override
public List<Emp> getAll() {
return dao.getAll();
}
@Override
public boolean addEmp(Emp emp) {
return dao.addEmp(emp);
}
@Override
public Emp getEmpById(Integer id) {
return dao.getEmpById(id);
}
@Override
public boolean delEmp(Integer id) {
return dao.delEmp(id);
}
}
5.8 Controller编码
@RestController
public class EmpController {
@Autowired
private EmpService service;
@PostMapping("/emp/add")
public boolean add(@RequestBody Emp emp){
return service.addEmp(emp);
}
@GetMapping("/emp/get/{id}")
public Emp get(@PathVariable Integer id){
return service.getEmpById(id);
}
@GetMapping("/emp/get/list")
public List<Emp> list(){
return service.getAll();
}
@DeleteMapping("/emp/delete/{id}")
public boolean delete(@PathVariable Integer id){
return service.delEmp(id);
}
}
5.9 启动类
注意：该类必须放在所有类的上级包中
@SpringBootApplication
public class EmpProviderApplication_8001 {
public static void main(String[] args) {
SpringApplication.run(EmpProviderApplication_8001.class, args);
}
}
运行启动类程序并测试。
6. 员工模块服务消费者构建
6.1 New Maven Module
6.2 pom配置
<dependencies>
<dependency>
<groupId>com.kgcgroupId>
<artifactId>emall-apiartifactId>
<version>0.0.1-SNAPSHOTversion>
dependency>
<dependency>
<groupId>org.springframework.bootgroupId>
<artifactId>spring-boot-starter-webartifactId>
<exclusions>
<exclusion>
<groupId>org.springframework.bootgroupId>
<artifactId>spring-boot-starter-tomcatartifactId>
exclusion>
exclusions>
dependency>
dependencies>
6.3 application.yml配置
server:
port: 80
80端口如果被System进程占用，可以修改注册表解决，参考下图
6.4 配置RestTemplate
暂时的目的是配置一个RestTemplate Bean，利用该对象远程调用服务提供者
@Configuration
public class ConfigBean {
@Bean
public RestTemplate getRestTemplate(){
return new RestTemplate();
}
}
6.5 Controller编码
@RestController
public class EmpController {
@Autowired
//RestTemplate是一种简单的访问restful服务模板类
private RestTemplate rt;
private static final String URL_PREFIX = "http://localhost:8001";//远程服务
@RequestMapping(value="/consumer/emp/add")
public boolean add(Emp emp){
return rt.postForObject(URL_PREFIX + "/emp/add", emp, Boolean.class);
}
@RequestMapping(value="/consumer/emp/get/{id}")
public Emp get(@PathVariable("id") Integer id){
return rt.getForObject(URL_PREFIX + "/emp/get/" + id, Emp.class);
}
@SuppressWarnings("unchecked")
@RequestMapping(value="/consumer/emp/get/list")
public List<Emp> list(){
return rt.getForObject(URL_PREFIX + "/emp/get/list" , List.class);
}
@RequestMapping(value="/consumer/emp/delete/{id}")
public void delete(@PathVariable("id") Integer id){
rt.delete(URL_PREFIX + "/emp/delete/" + id, Boolean.class);
}
}
6.6 启动类
@SpringBootApplication
public class EmpConsumerApplication_80 {
public static void main(String[] args) {
SpringApplication.run(EmpConsumerApplication_80.class, args);
}
}
6.7 测试
分别启动员工服务提供者和员工服务消费者两个服务，然后在浏览器中发请求，
测试成功则基础模块搭建成功！！！