SpringCloud與微服務Ⅳ --- Rest微服務構建案例工程模塊

時間 2019-12-02

標籤 springcloud 微服 rest 構建案例工程模塊简体版

原文原文鏈接

一.父工程搭建java

父工程pom:mysql

<?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.wang.springcloud</groupId>
    <artifactId>microservice</artifactId>
    <version>1.0-SNAPSHOT</version>
    <packaging>pom</packaging>

    <properties>
        <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
        <maven.compiler.source>1.8</maven.compiler.source>
        <maven.compiler.target>1.8</maven.compiler.target>
        <junit.version>4.12</junit.version>
        <log4j.version>1.2.17</log4j.version>
        <lombok.version>1.16.18</lombok.version>
    </properties>

    <dependencyManagement>
        <dependencies>
            <dependency>
                <groupId>org.springframework.cloud</groupId>
                <artifactId>spring-cloud-dependencies</artifactId>
                <version>Dalston.SR1</version>
                <type>pom</type>
                <scope>import</scope>
            </dependency>
            <dependency>
                <groupId>org.springframework.boot</groupId>
                <artifactId>spring-boot-dependencies</artifactId>
                <version>1.5.9.RELEASE</version>
                <type>pom</type>
                <scope>import</scope>
            </dependency>
            <dependency>
                <groupId>mysql</groupId>
                <artifactId>mysql-connector-java</artifactId>
                <version>5.0.4</version>
            </dependency>
            <dependency>
                <groupId>com.alibaba</groupId>
                <artifactId>druid</artifactId>
                <version>1.0.31</version>
            </dependency>
            <dependency>
                <groupId>org.mybatis.spring.boot</groupId>
                <artifactId>mybatis-spring-boot-starter</artifactId>
                <version>1.3.0</version>
            </dependency>
            <dependency>
                <groupId>ch.qos.logback</groupId>
                <artifactId>logback-core</artifactId>
                <version>1.2.3</version>
            </dependency>
            <dependency>
                <groupId>junit</groupId>
                <artifactId>junit</artifactId>
                <version>${junit.version}</version>
                <scope>test</scope>
            </dependency>
            <dependency>
                <groupId>log4j</groupId>
                <artifactId>log4j</artifactId>
                <version>${log4j.version}</version>
            </dependency>
        </dependencies>
    </dependencyManagement>

    <build>
        <finalName>microservice</finalName>
        <resources>
            <resource>
                <directory>src/main/resources</directory>
                <filtering>true</filtering>
            </resource>
        </resources>
        <plugins>
            <plugin>
                <groupId>org.apache.maven.plugins</groupId>
                <artifactId>maven-resources-plugin</artifactId>
                <configuration>
                    <delimiters>
                        <delimit>$</delimit>
                    </delimiters>
                </configuration>
            </plugin>
        </plugins>
    </build>

</project>

二.Entity子工程搭建web

將實體類抽離出來獨立一個工程，方便多個工程調用，使用時只須要導入該工程的maven依賴就能夠引用了。spring

2.1 pom依賴
sql

<?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">
    <parent>
        <artifactId>microservice</artifactId>
        <groupId>com.wang.springcloud</groupId>
        <version>1.0-SNAPSHOT</version>
    </parent>
    <modelVersion>4.0.0</modelVersion>
    <artifactId>microservice-api</artifactId>
    <packaging>jar</packaging>

    <dependencies>
        <dependency>
            <groupId>org.projectlombok</groupId>
            <artifactId>lombok</artifactId>
        </dependency>
    </dependencies>
</project>

2.2 實體類(這裏用了lombok)數據庫

package com.wang.springcloud.entities;

import lombok.AllArgsConstructor;
import lombok.Data;
import lombok.NoArgsConstructor;
import lombok.experimental.Accessors;

import java.io.Serializable;
@AllArgsConstructor //全參構造
@NoArgsConstructor //無參構造
@Data //生產getter和setter方法
@Accessors(chain = true) //鏈式風格訪問
public class Dept implements Serializable { //Entity
    private Long deptno;
    private String dname;
    private String db_source;//來自哪一個數據庫，由於微服務架構能夠一個服務對應一個數據庫，同一個信息被存儲到不一樣數據庫

    public Dept(String dname) {
        this.dname = dname;
    }

}

三.服務提供者apache

3.1 pom依賴
api

<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>

    <parent>
        <groupId>com.wang.springcloud</groupId>
        <artifactId>microservice</artifactId>
        <version>1.0-SNAPSHOT</version>
    </parent>

    <artifactId>microservicecloud-provider-dept-8001</artifactId>

    <dependencies>
        <!-- 引入本身定義的api通用包，能夠使用Dept部門Entity -->
        <dependency>
            <groupId>com.wang.springcloud</groupId>
            <artifactId>microservice-api</artifactId>
            <version>${project.version}</version>
        </dependency>
        <!-- actuator監控信息完善 -->
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-actuator</artifactId>
        </dependency>
        <!-- 將微服務provider側註冊進eureka -->
        <dependency>
            <groupId>org.springframework.cloud</groupId>
            <artifactId>spring-cloud-starter-eureka</artifactId>
        </dependency>
        <dependency>
            <groupId>org.springframework.cloud</groupId>
            <artifactId>spring-cloud-starter-config</artifactId>
        </dependency>
        <dependency>
            <groupId>junit</groupId>
            <artifactId>junit</artifactId>
        </dependency>
        <dependency>
            <groupId>mysql</groupId>
            <artifactId>mysql-connector-java</artifactId>
        </dependency>
        <dependency>
            <groupId>com.alibaba</groupId>
            <artifactId>druid</artifactId>
        </dependency>
        <dependency>
            <groupId>ch.qos.logback</groupId>
            <artifactId>logback-core</artifactId>
        </dependency>
        <dependency>
            <groupId>org.mybatis.spring.boot</groupId>
            <artifactId>mybatis-spring-boot-starter</artifactId>
        </dependency>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-jetty</artifactId>
        </dependency>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-web</artifactId>
        </dependency>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-test</artifactId>
        </dependency>
        <!-- 修改後當即生效，熱部署 -->
        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>springloaded</artifactId>
        </dependency>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-devtools</artifactId>
        </dependency>
    </dependencies>

</project>

3.2 系統配置文件
緩存

server:
  port: 8001
mybatis:
  config-location: classpath:mybatis/mybatis.cfg.xml #mybatis配置文件所在路徑
  type-aliases-package: com.wang.springcloud.entities #全部entity別名類所在包
  mapper-locations: classpath:mybatis/mapper/**/*.xml #mapper映射文件

spring:
  application:
    name: microservice-dept
  datasource:
    type: com.alibaba.druid.pool.DruidDataSource  #數據源類型
    driver-class-name: org.gjt.mm.mysql.Driver  #數據庫驅動
    url: jdbc:mysql://localhost:3306/cloudDB01  #數據庫url
    username: root
    password: 123456
    dbcp2:
      min-idle: 5 #數據庫鏈接池的最小維持鏈接數
      initial-size: 5 #初始化鏈接數
      max-total: 5  #最大鏈接數
      max-wait-millis: 200  #等待鏈接獲取的最大超時時間

3.3 mybatis的xml配置文件
restful

<?xml version="1.0" encoding="UTF-8" ?>
<!DOCTYPE configuration
        PUBLIC "-//mybatis.org//DTD Config 3.0//EN"
        "http://mybatis.org/dtd/mybatis-3-config.dtd">

<configuration>
    <settings>
        <setting name="cacheEnabled" value="true" /><!-- 二級緩存開啓 -->
    </settings>
</configuration>

3.4 mapper接口

@Mapper
public interface DeptMapper {
    public boolean addDept(Dept dept);

    public Dept findById(Long id);

    public List<Dept> findAll();
}

3.5 mapper的xml映射

<?xml version="1.0" encoding="UTF-8" ?>
<!DOCTYPE mapper PUBLIC "-//mybatis.org//DTD Mapper 3.0//EN"
        "http://mybatis.org/dtd/mybatis-3-mapper.dtd">

<mapper namespace="com.wang.springcloud.mapper.DeptMapper">

    <select id="findById" resultType="Dept" parameterType="Long">
        select deptno,dname,db_source from dept where deptno=#{deptno};
    </select>
    <select id="findAll" resultType="Dept">
        select deptno,dname,db_source from dept;
    </select>
    <insert id="addDept" parameterType="Dept">
        INSERT INTO dept(dname,db_source) VALUES(#{dname},DATABASE());
    </insert>
</mapper>

3.6 啓動類

package com.wang.springcloud;

import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;

@SpringBootApplication
public class DeptProvider8001 {
    public static void main(String[] args) {
        SpringApplication.run(DeptProvider8001.class,args);
    }
}

四.服務消費者

4.1 pom依賴

<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>

    <parent>
        <groupId>com.wang.springcloud</groupId>
        <artifactId>microservice</artifactId>
        <version>1.0-SNAPSHOT</version>
    </parent>

    <artifactId>microservicecloud-consumer-dept-80</artifactId>
    <description>部門微服務消費者</description>

    <dependencies>
        <dependency><!-- 本身定義的api -->
            <groupId>com.wang.springcloud</groupId>
            <artifactId>microservice-api</artifactId>
            <version>${project.version}</version>
        </dependency>
        <!-- Ribbon相關 -->
        <dependency>
            <groupId>org.springframework.cloud</groupId>
            <artifactId>spring-cloud-starter-eureka</artifactId>
        </dependency>
        <dependency>
            <groupId>org.springframework.cloud</groupId>
            <artifactId>spring-cloud-starter-ribbon</artifactId>
        </dependency>
        <dependency>
            <groupId>org.springframework.cloud</groupId>
            <artifactId>spring-cloud-starter-config</artifactId>
        </dependency>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-web</artifactId>
        </dependency>
        <!-- 修改後當即生效，熱部署 -->
        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>springloaded</artifactId>
        </dependency>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-devtools</artifactId>
        </dependency>
    </dependencies>
</project>

4.2 系統配置文件

server:
  port: 80

4.3 配置類注入RestTemplate

package com.wang.springcloud.config;

import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import org.springframework.web.client.RestTemplate;


@Configuration
public class MyApplicationConfig {
    @Bean
    public RestTemplate getRestTemplate(){
        return new RestTemplate();
    }
}

4.4 Controller消費服務

RestTemplate提供了多種便捷訪問遠程Http服務的方法,是一種簡單便捷的訪問restful服務的模板類，是Spring提供的用於訪問Rest服務的客戶端模板工具類。

postForObject(url,requestMap,ResponseBean.class)參數分別表明Rest請求地址，請求參數，HTTP響應被轉換成的對象類型

package com.wang.springcloud.controller;

import com.wang.springcloud.entities.Dept;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.web.bind.annotation.PathVariable;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestMethod;
import org.springframework.web.bind.annotation.RestController;
import org.springframework.web.client.RestTemplate;

import java.util.List;

@RestController
public class DeptController {
    private static final String REST_URL_PREFIX = "http://localhost:8001";
    @Autowired
    private RestTemplate restTemplate;

    @RequestMapping(value = "/consumer/dept/add",method = RequestMethod.POST)
    public boolean add(Dept dept){
        return restTemplate.postForObject(REST_URL_PREFIX+"/dept/add",dept,Boolean.class);
    }

    @RequestMapping(value = "/consumer/dept/get/{id}",method = RequestMethod.GET)
    public Dept get(@PathVariable("id") Long id){
        return restTemplate.getForObject(REST_URL_PREFIX+"/dept/get/"+id,Dept.class);
    }

    @SuppressWarnings("unchecked")
    @RequestMapping(value = "/consumer/dept/list",method = RequestMethod.GET)
    public List<Dept> list(){
        return restTemplate.getForObject(REST_URL_PREFIX+"/dept/list",List.class);
    }
}

相關標籤/搜索

每日一句

每一个你不满意的现在，都有一个你没有努力的曾经。