Rest环境搭建

Rest环境搭建

父工程：pom文件，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">
    <modelVersion>4.0.0</modelVersion>

    <groupId>org.example</groupId>
    <artifactId>springcloud</artifactId>
    <version>1.0-SNAPSHOT</version>
    <modules>
        <module>springcloud-api</module>
        <module>springcloud-provider-dept-8001</module>
        <module>springcloud-consumer-dept-80</module>
    </modules>


    <packaging>pom</packaging>

    <properties>
        <junit.version>4.13.1</junit.version>
        <mysql.version>8.0.26</mysql.version>
        <druid.version>1.2.4</druid.version>
        <lombok.version>1.18.20</lombok.version>
        <logback-core.version>1.2.5</logback-core.version>
        <mybatis-spring-boot-starter.version>2.1.4</mybatis-spring-boot-starter.version>
        <spring-boot-dependencies.version>2.5.4</spring-boot-dependencies.version>
        <spring-cloud-dependencies.version>Hoxton.SR9</spring-cloud-dependencies.version>
    </properties>
    >

    <dependencyManagement>
        <dependencies>
            <dependency>
                <groupId>org.springframework.cloud</groupId>
                <artifactId>spring-cloud-dependencies</artifactId>
                <version>${spring-cloud-dependencies.version}</version>
                <type>pom</type>
                <scope>import</scope>
            </dependency>


            <dependency>
                <groupId>org.springframework.boot</groupId>
                <artifactId>spring-boot-dependencies</artifactId>
                <version>${spring-boot-dependencies.version}</version>
                <type>pom</type>
                <scope>import</scope>
            </dependency>

            <dependency>
                <groupId>mysql</groupId>
                <artifactId>mysql-connector-java</artifactId>
                <version>${mysql.version}</version>
            </dependency>
            <dependency>
                <groupId>com.alibaba</groupId>
                <artifactId>druid</artifactId>
                <version>${druid.version}</version>
            </dependency>
            <dependency>
                <groupId>org.mybatis.spring.boot</groupId>
                <artifactId>mybatis-spring-boot-starter</artifactId>
                <version>${mybatis-spring-boot-starter.version}</version>
            </dependency>
            <dependency>
                <groupId>junit</groupId>
                <artifactId>junit</artifactId>
                <version>${junit.version}</version>
                <scope>test</scope>
            </dependency>
            <dependency>
                <groupId>ch.qos.logback</groupId>
                <artifactId>logback-core</artifactId>
                <version>${logback-core.version}</version>
            </dependency>
            <dependency>
                <groupId>org.projectlombok</groupId>
                <artifactId>lombok</artifactId>
                <version>${lombok.version}</version>
            </dependency>
        </dependencies>
    </dependencyManagement>


</project>

数据库表

deptno dname db_source
1 开发部 db01
2 人事部 db01
3 财务部 db01
4 市场部 db01
5 运维部 db01

生产者模块：

provider-dept-8001

1.编写配置文件application.yaml,在pom文件导入需要的包

server:
  port: 8001

#mybatis配置
mybatis:
  type-aliases-package: com.yhc.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
    driver-class-name: com.mysql.cj.jdbc.Driver
    url: jdbc:mysql://localhost:3306/db01?useUnicode=true&characterEncoding=utf-8
    username: root
    password: 123456

2.编写dao层:

DeptDao

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

import java.util.List;

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

    public Dept queryById(Long id);

    public List<Dept> queryAll();
}

3.编写service层

DeptService

import com.yhc.pojo.Dept;

import java.util.List;

public interface DeptService {

    public boolean addDept(Dept dept);

    public Dept queryById(Long id);

    public List<Dept> queryAll();
}

DeptServiceImpl

import com.yhc.dao.DeptDao;
import com.yhc.pojo.Dept;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import org.yaml.snakeyaml.events.Event;

import java.util.List;


@Service
public class DeptServiceImpl implements DeptService{

    @Autowired
    DeptDao deptDao;

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

    public Dept queryById(Long id) {
        return deptDao.queryById(id);
    }

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

4.编写mapper.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.yhc.dao.DeptDao">

    <insert id="addDept" parameterType="Dept">
        insert into dept(dname,db_source)
        values(#{dname},DATABASE())
    </insert>

    <select id="queryById" resultType="Dept" parameterType="Long" >
        select * from dept where deptno=#{deptno};
    </select>

    <select id="queryAll" resultType="Dept" >
        select * from dept;
    </select>

</mapper>

5.编写controller层

import com.yhc.pojo.Dept;
import com.yhc.service.DeptService;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.PathVariable;
import org.springframework.web.bind.annotation.PostMapping;
import org.springframework.web.bind.annotation.RestController;

import java.util.List;


@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 get(@PathVariable("id")Long id ){
        return deptService.queryById(id);
    }

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

6.编写主程序类

DeptProvider_8001

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

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

消费者模块

consumer_dept_80

1.在application.yml中配置端口80

server:
  port: 80

2.利用rsetTemplate提供便捷访问远程http服务的方法，简单的restful模块

• 编写配置文件，将rsetTemplate注入bean

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

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

3.Controller层使用RestTemplate

import com.yhc.pojo.Dept;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.web.bind.annotation.*;
import org.springframework.web.client.RestTemplate;

import java.util.List;


@RestController
public class DeptConsumerController {

    @Autowired
    private RestTemplate restTemplate;//提供便捷访问远程http服务的方法，简单的restful服务模板

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

    @PostMapping("/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> list() {
        return restTemplate.getForObject(REST_URL_PREFIX + "/dept/list", List.class);
    }
}

4.编写主程序

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


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

测试运行