发布日期: 2021-01-07

更新日期: 2021-01-10

文章字数: 2.2k

阅读时长: 12 分

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Rest环境搭建

1、导入依赖

父工程pom.xml

<?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.allen</groupId>
    <artifactId>springcloud</artifactId>
    <version>1.0-SNAPSHOT</version>
    <modules>
        <module>springcloud-api</module>
        <module>springcloud-provider-dept-8001</module>
    </modules>

    <!--    打包方式  pom -->
    <packaging>pom</packaging>

    <properties>
        <junit.version>4.13.1</junit.version>
        <lombok.version>1.18.16</lombok.version>
    </properties>

    <dependencyManagement>
        <dependencies>
        <!--springcloud的依赖-->
            <!-- https://mvnrepository.com/artifact/org.springframework.cloud/spring-cloud-dependencies -->
            <dependency>
                <groupId>org.springframework.cloud</groupId>
                <artifactId>spring-cloud-dependencies</artifactId>
                <version>Greenwich.SR3</version>
                <type>pom</type>
                <scope>import</scope>
            </dependency>
        <!--            springboot-->
            <!-- https://mvnrepository.com/artifact/org.springframework.boot/spring-boot-dependencies -->
            <dependency>
                <groupId>org.springframework.boot</groupId>
                <artifactId>spring-boot-dependencies</artifactId>
                <version>2.4.1</version>
                <type>pom</type>
                <scope>import</scope>
            </dependency>

            <!-- https://mvnrepository.com/artifact/mysql/mysql-connector-java -->
            <dependency>
                <groupId>mysql</groupId>
                <artifactId>mysql-connector-java</artifactId>
                <version>5.1.47</version>
            </dependency>
            <!-- https://mvnrepository.com/artifact/com.alibaba/druid -->
            <dependency>
                <groupId>com.alibaba</groupId>
                <artifactId>druid</artifactId>
                <version>1.2.4</version>
            </dependency>

            <!-- https://mvnrepository.com/artifact/org.mybatis.spring.boot/mybatis-spring-boot-starter -->
            <dependency>
                <groupId>org.mybatis.spring.boot</groupId>
                <artifactId>mybatis-spring-boot-starter</artifactId>
                <version>2.1.4</version>
            </dependency>

            <!-- https://mvnrepository.com/artifact/log4j/log4j -->
            <dependency>
                <groupId>log4j</groupId>
                <artifactId>log4j</artifactId>
                <version>1.2.17</version>
            </dependency>

            <!-- https://mvnrepository.com/artifact/junit/junit -->
            <dependency>
                <groupId>junit</groupId>
                <artifactId>junit</artifactId>
                <version>${junit.version}</version>
                <scope>test</scope>
            </dependency>

            <!-- https://mvnrepository.com/artifact/org.projectlombok/lombok -->
            <dependency>
                <groupId>org.projectlombok</groupId>
                <artifactId>lombok</artifactId>
                <version>${lombok.version}</version>
                <scope>provided</scope>
            </dependency>


        </dependencies>
    </dependencyManagement>
</project>

子模块pom.xml（无需指定版本，与父依赖一致）

<?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>springcloud</artifactId>
        <groupId>com.allen</groupId>
        <version>1.0-SNAPSHOT</version>
    </parent>
    <modelVersion>4.0.0</modelVersion>

    <artifactId>springcloud-api</artifactId>
    <dependencies>
        <dependency>
            <groupId>org.projectlombok</groupId>
            <artifactId>lombok</artifactId>
        </dependency>
    </dependencies>

</project>

2、新建数据库db_01

新建表 dept

字段：

deptno
deptname
db_source

3、新建 springcloud-api 模块

在 springcloud-api 模块下新建 com.allen.springcloud.pojo 目录，然后创建

Dept 实体类

注意：属性名与数据库字段名要一致，否则查询不到！

package com.allen.springcloud.pojo;

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

import java.io.Serializable;

/**
 * @author Allen
 * @date 2021/1/7 16:24
 */

@Data
@NoArgsConstructor
@Accessors(chain = true)    //链式写法
public class Dept implements Serializable {     //实体类，ORM（对象关系映射）

    private long deptno;
    private String deptname;
    private String db_source;

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

    /*
    链式写法：
    Dept dept = new Dept();
    dept.setDeptno(11).setDname("allen").setDb_source("001");
     */
}

4、新建 springcloud-provider-dept-8001 提供者模块

4.1、导入依赖

<?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>springcloud</artifactId>
        <groupId>com.allen</groupId>
        <version>1.0-SNAPSHOT</version>
    </parent>
    <modelVersion>4.0.0</modelVersion>

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

    <dependencies>
        <!--我们需要在此模块用到另一个模块的实体类，需要导入-->
        <dependency>
            <groupId>com.allen</groupId>
            <artifactId>springcloud-api</artifactId>
            <version>1.0-SNAPSHOT</version>
        </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>log4j</groupId>
            <artifactId>log4j</artifactId>
        </dependency>

        <dependency>
            <groupId>org.mybatis.spring.boot</groupId>
            <artifactId>mybatis-spring-boot-starter</artifactId>
        </dependency>

        <!--        test-->
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-test</artifactId>
        </dependency>

        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-web</artifactId>
        </dependency>

<!--        jetty-->
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-jetty</artifactId>
        </dependency>

<!--        热部署-->
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-devtools</artifactId>
        </dependency>

    </dependencies>

</project>

4.2、编写配置文件

application.yml

server:
  port: 8001

# mybatis配置
mybatis:
  type-aliases-package: com.allen.springcloud.pojo
  config-location: classpath:mybatis/mybatis-config.xml
  mapper-locations: classpath:mybatis/mapper/*.xml

# spring配置
spring:
  application:
    name: springcloud-provider-dept
  datasource:
    type: com.alibaba.druid.pool.DruidDataSource  #数据源
    driver-class-name: com.mysql.jdbc.Driver
    url: jdbc:mysql://localhost:3306/db01?useUnicode=true&characterEncoding=utf-8&useSSL=false
    username: root
    password: 1005

4.3、编写mybatis配置

mybatis-config.xml

<?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>
<!--    开启二级缓存-->
    <settings>
        <setting name="cacheEnabled" value="true"/>
    </settings>
</configuration>

4.4、编写dao层

新建 dao 目录，编写

DeptDao，注意注解

package com.allen.springcloud.dao;

import com.allen.springcloud.pojo.Dept;
import org.apache.ibatis.annotations.Mapper;
import org.springframework.stereotype.Repository;

import java.util.List;

/**
 * @author Allen
 * @date 2021/1/7 17:16
 */

@Mapper
@Repository
public interface DeptDao {

    public boolean addDept(Dept dept);

    public Dept queryDeptById(Long id);

    public List<Dept> queryAll();
}

4.5、编写 mapper.xml

deptMapper.xml, 位于resource/mybatis/mapper/deptMapper.xml

<?xml version="1.0" encoding="UTF-8" ?>
<!DOCTYPE mapper
        PUBLIC "-//mybatis.org//DTD Config 3.0//EN"
        "http://mybatis.org/dtd/mybatis-3-mapper.dtd">
<mapper namespace="com.allen.springcloud.dao.DeptDao">
    <insert id="addDept" parameterType="dept">
        insert into db01.dept(deptname, db_source) VALUES (#{dname},DATABASE())
    </insert>

    <select id="queryDeptById" resultType="dept" parameterType="Long">
        select * from db01.dept where deptno=#{id}
    </select>

    <select id="queryAll" resultType="dept">
        select * from db01.dept
    </select>
</mapper>

4.6、编写service层

接口 DeptService

package com.allen.springcloud.service;

import com.allen.springcloud.pojo.Dept;

import java.util.List;

/**
 * @author Allen
 * @date 2021/1/7 19:10
 */
public interface DeptService {

    public boolean addDept(Dept dept);

    public Dept queryDeptById(Long id);

    public List<Dept> queryAll();
}

实现类 DeptServiceImpl

package com.allen.springcloud.service;

import com.allen.springcloud.dao.DeptDao;
import com.allen.springcloud.pojo.Dept;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;

import java.util.List;

/**
 * @author Allen
 * @date 2021/1/7 19:10
 */

@Service
public class DeptServiceImpl implements DeptService {

    @Autowired
    private DeptDao deptDao;

    @Override
    public boolean addDept(Dept dept) {
        return deptDao.addDept(dept);
    }

    @Override
    public Dept queryDeptById(Long id) {
        return deptDao.queryDeptById(id);
    }

    @Override
    public List<Dept> queryAll() {
        return deptDao.queryAll();
    }
}

4.7、编写controller层

DeptController

package com.allen.springcloud.deptController;

import com.allen.springcloud.pojo.Dept;
import com.allen.springcloud.service.DeptService;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.web.bind.annotation.*;

import java.util.List;

/**
 * @author Allen
 * @date 2021/1/7 19:30
 */

//提供Restful服务
@RestController
public class DeptController  {

    @Autowired
    private DeptService deptService;

    @PostMapping("/dept/add")
    public boolean addDept(Dept dept){
        return deptService.addDept(dept);
    }

    @GetMapping("/dept/get/{id}")
    public Dept queryDeptById(@PathVariable("id") Long id){
        return deptService.queryDeptById(id);
    }

    @GetMapping("/dept/list")
    public List<Dept> queryAll(){
        return deptService.queryAll();
    }
}

4.8、编写启动类

DeptProvider_8001，
位于\src\main\java\com\allen\springcloud\DeptProvider_8001.java

package com.allen.springcloud;

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

/**
 * @author Allen
 * @date 2021/1/7 19:39
 */
//启动类
@SpringBootApplication
public class DeptProvider_8001 {

    public static void main(String[] args) {
        SpringApplication.run(DeptProvider_8001.class,args);
    }
}

5、新建 springcloud-consumer-dept-80 消费者模块

5.1、导入依赖

pom.xml

<?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>springcloud</artifactId>
        <groupId>com.allen</groupId>
        <version>1.0-SNAPSHOT</version>
    </parent>
    <modelVersion>4.0.0</modelVersion>

    <artifactId>springcloud-consumer-dept-80</artifactId>
    <dependencies>
        <dependency>
            <groupId>com.allen</groupId>
            <artifactId>springcloud-api</artifactId>
            <version>1.0-SNAPSHOT</version>
        </dependency>

        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-web</artifactId>
        </dependency>

        <!--        热部署-->
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-devtools</artifactId>
        </dependency>
    </dependencies>

</project>

5.2、配置端口

application.yml

server:
  port: 80

5.3、注册 RestTemplate 模版

新建 ConfigBean 类，将 RestTemplate 模版注册到容器中

ConfigBean

package com.allen.springcloud.config;

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

/**
 * @author Allen
 * @date 2021/1/7 22:01
 */

@Configuration      //等价于  spring applicationContext.xml
public class ConfigBean {

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

5.4、编写消费者控制器

DeptConsumerController

package com.allen.springcloud.controller;

import com.allen.springcloud.pojo.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.RestController;
import org.springframework.web.client.RestTemplate;

import java.util.List;

/**
 * @author Allen
 * @date 2021/1/7 21:57
 */

@RestController
public class DeptConsumerController {

    //消费者，不应该有service层
    //RestTemplate，直接调用，注册到spring容器中
    @Autowired
    private RestTemplate restTemplate;  //提供多种便捷访问远程http服务的方法，便捷的Restful服务模版

    private static final String REST_URL_PREFIX = "http://localhost:8001";


    @RequestMapping("/consumer/dept/add")
    public boolean add(Dept dept){
        return restTemplate.postForObject(REST_URL_PREFIX+"/dept/add",dept,boolean.class);
    }

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

    @RequestMapping("/consumer/dept/list")
    public List<Dept> getAll(){
        return restTemplate.getForObject(REST_URL_PREFIX+"/dept/list",List.class);
    }
}

5.5、编写消费者启动类

DeptConsumer_80

package com.allen.springcloud;

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

/**
 * @author Allen
 * @date 2021/1/7 22:15
 */

@SpringBootApplication
public class DeptConsumer_80 {

    public static void main(String[] args) {
        SpringApplication.run(DeptConsumer_80.class,args);
    }
}

6、测试

测试时，先开启提供者服务类，再开启消费者服务类。

可直接通过消费者访问提供者的服务，restTemplate：提供多种便捷访问远程http服务的方法，便捷的Restful服务模版。

Hailong Gao

https://hlgao666.github.io/2021/01/07/springcloud/Rest环境搭建/

本博客所有文章除特別声明外，均采用 CC BY 4.0 许可协议。转载请注明来源 Hailong Gao !

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springcloud

Rest环境搭建

Rest环境搭建

1、导入依赖

2、新建数据库db_01

3、新建 springcloud-api 模块

4、新建 springcloud-provider-dept-8001 提供者模块

4.1、导入依赖

4.2、编写配置文件

4.3、编写mybatis配置

4.4、编写dao层

4.5、编写 mapper.xml

4.6、编写service层

4.7、编写controller层

4.8、编写启动类

5、新建 springcloud-consumer-dept-80 消费者模块

5.1、导入依赖

5.2、配置端口

5.3、注册 RestTemplate 模版

5.4、编写消费者控制器

5.5、编写消费者启动类

6、测试

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