SpringCloud-Netflix-03-服务远程调用_spring cloud netflix 服务之间调用

作者vip1024c交流
51 阅读3分钟 
    <artifactId>spring-boot-starter-parent</artifactId>
    <version>2.3.8.RELEASE</version>
    <relativePath/>
</parent>

<groupId>com.cloud</groupId>
<artifactId>parent</artifactId>
<version>1.0-SNAPSHOT</version>

<properties>
    <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
    <project.reporting.outputEncoding>UTF-8</project.reporting.outputEncoding>
    <java.version>1.8</java.version>
</properties>

<dependencies>
    <dependency>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-web</artifactId>
    </dependency>
    <dependency>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-logging</artifactId>
    </dependency>
    <dependency>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-test</artifactId>
        <scope>test</scope>
    </dependency>
    <dependency>
        <groupId>org.projectlombok</groupId>
        <artifactId>lombok</artifactId>
        <version>1.18.4</version>
        <scope>provided</scope>
    </dependency>
</dependencies>

<dependencyManagement>
    <dependencies>
        <dependency>
            <groupId>org.springframework.cloud</groupId>
            <artifactId>spring-cloud-dependencies</artifactId>
            <version>Hoxton.SR10</version>
            <type>pom</type>
            <scope>import</scope>
        </dependency>
    </dependencies>
</dependencyManagement>


#### 3.1.2 搭建商品微服务



##### 3.1.2.1 maven依赖：

01_SpringCloud_RestTemplate com.cloud 1.0-SNAPSHOT 4.0.0

<artifactId>item_server</artifactId>


##### 3.1.2.2 application.yml

server: port: 9000


##### 3.1.2.3 ItemApplication

package com.cloud.item;

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

/** * @author lscl * @version 1.0 * @intro: */ @SpringBootApplication public class ItemApplication { public static void main(String[] args) { SpringApplication.run(ItemApplication.class); } }


##### 3.1.2.4 ItemController

package com.cloud.item.controller;

import org.springframework.web.bind.annotation.RequestMapping; import org.springframework.web.bind.annotation.RestController;

/** * @author lscl * @version 1.0 * @intro: */ @RestController @RequestMapping("/item") public class ItemController {

}


##### 3.1.2.5 Order实体类




> 

> 实际开发应该搭建一个common公共模块，实体类编写在公共模块中，我们为了简单起见，在各个微服务中编写同样的实体类；

> 

> 

>

package com.cloud.item.entity;

import lombok.Getter; import lombok.Setter; import lombok.ToString;

/** * @author lscl * @version 1.0 * @intro: 订单实体类 */ @Data // get/set/toString @NoArgsConstructor // 无参构造 @AllArgsConstructor // 有参构造 public class Order {

private Integer id;
private String itemName;
private Double price;
private Integer num;

}


#### 3.1.3 搭建订单微服务



##### 3.1.3.1 maven依赖

01_SpringCloud_RestTemplate com.cloud 1.0-SNAPSHOT 4.0.0

<artifactId>order_server</artifactId>


##### 3.1.3.2 application.yml

server: port: 9001


##### 3.1.3.3 OrderApplication

package com.cloud.order;

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

/** * @author lscl * @version 1.0 * @intro: */ @SpringBootApplication public class OrderApplication { public static void main(String[] args) { SpringApplication.run(OrderApplication.class); } }


##### 3.1.3.4 Order实体类

package com.cloud.order.entity;

import lombok.Getter; import lombok.Setter; import lombok.ToString;

/** * @author lscl * @version 1.0 * @intro: 订单实体类 */ @Data // get/set/toString @NoArgsConstructor // 无参构造 @AllArgsConstructor // 有参构造 public class Order {

private Integer id;
private String itemName;
private Double price;
private Integer num;

}


##### 3.1.3.5 OrderController

package com.cloud.order.controller;

import com.cloud.order.entity.Order; import org.springframework.web.bind.annotation.*;

import java.util.HashMap; import java.util.Map;

/** * @author lscl * @version 1.0 * @intro: */ @RestController @RequestMapping("/order") public class OrderController {

/\*\*

* 新增订单 * @param order * @return */ @PostMapping public Map save(@RequestBody Order order){

    return new HashMap(){{
        put("flag",true);
        put("message","新增成功");
        put("statusCode","200");
        put("order",order);
    }};
}

/\*\*

* 删除订单 * @param id * @return */ @DeleteMapping("{id}") public Map delete(@PathVariable Integer id){

    return new HashMap(){{
        put("flag",true);
        put("message","删除成功");
        put("statusCode","200");
        put("id",id);
    }};
}

/\*\*

* * @param id * @param order * @return */ @PutMapping("{id}") public Map update(@PathVariable Integer id,@RequestBody Order order){

    order.setId(id);
    return new HashMap(){{
        put("flag",true);
        put("message","修改");
        put("statusCode","200");
        put("order",order);
    }};
}

@GetMapping("{id}")
public Map findById(@PathVariable Integer id){

    return new HashMap(){{
        put("flag",true);
        put("message","查询成功");
        put("statusCode","200");
        put("id",id);
    }};
}

}


工程搭建如下：


![在这里插入图片描述](https://p6-xtjj-sign.byteimg.com/tos-cn-i-73owjymdk6/6aeeb55d55004c2fbab2ec201a66095b~tplv-73owjymdk6-jj-mark-v1:0:0:0:0:5o6Y6YeR5oqA5pyv56S-5Yy6IEAg5L2c6ICFdmlwMTAyNGPkuqTmtYE=:q75.awebp?rk3s=f64ab15b&x-expires=1771032688&x-signature=20c9R9dVyQPFd9ZAK79J09J0VNU%3D)


### 3.2 RestTemplate


RestTemplate 是从 Spring3.0 开始支持的一个 HTTP 请求工具，它提供了常见的REST请求方案的模版，例如 GET 请求、POST 请求、PUT 请求、DELETE 请求以及一些通用的请求执行方法 exchange 以及 execute。RestTemplate 继承自 InterceptingHttpAccessor 并且实现了 RestOperations 接口，其中 RestOperations 接口定义了基本的 RESTful 操作，这些操作在 RestTemplate 中都得到了实现。接下来我们就来看看这些操作方法的使用。


#### 3.2.1 RestTemplate方法介绍




| 请求方式 | 方法 | 返回值 |
| --- | --- | --- |
| GET | getForObject(String,Class,Object…) |  |
| GET | getForEntity(String,Class,Object…) | ResponseEntity |
| POST | postForLocation(String,Object,Object…) | URI |
| POST | postForObject(String,Object,Class,Object…) |  |
| POST | postForEntity(String,Class,Object…) | ResponseEntity |
| PUT | put(String,Object,Object…) | void |
| DELETE | delete(String,Object…) | void |
| 自定义 | exchange(String,HttpMethod,HttpEntity,Class,Object…) | ResponseEntity |


#### 3.2.2 配置 RestTemplate

package com.cloud.item;

import org.springframework.boot.SpringApplication; import org.springframework.boot.autoconfigure.SpringBootApplication; import org.springframework.cloud.netflix.eureka.EnableEurekaClient; import org.springframework.context.annotation.Bean; import org.springframework.web.client.RestTemplate;

/** * @author lscl * @version 1.0 * @intro: */ @SpringBootApplication public class ItemApplication { public static void main(String[] args) { SpringApplication.run(ItemApplication.class); }

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

}


#### 3.2.3 测试类

package com.cloud.demo;

import com.cloud.item.ItemApplication; import com.cloud.item.entity.Order; import org.junit.Test; import org.junit.runner.RunWith; import org.springframework.beans.factory.annotation.Autowired; import org.springframework.boot.test.context.SpringBootTest; import org.springframework.http.HttpEntity; import org.springframework.http.HttpMethod; import org.springframework.http.ResponseEntity; import org.springframework.test.context.junit4.SpringRunner; import org.springframework.web.client.RestTemplate;

import java.util.Map;

/** * @author lscl * @version 1.0 * @intro: */ @SpringBootTest(classes = ItemApplication.class) @RunWith(SpringRunner.class) public class Demo01 {

@Autowired
private RestTemplate restTemplate;

/\*\*

* get请求 */ @Test public void test1() {

    // 直接获取响应体

// Map resultMap = restTemplate.getForObject("http://localhost:9001/order/1", Map.class);

    // 获取响应实体
    ResponseEntity<Map> entity = restTemplate.getForEntity("http://localhost:9001/order/1", Map.class);

    // 响应码
    System.out.println(entity.getStatusCodeValue());

    // 响应头
    System.out.println(entity.getHeaders());

    // 响应体
    Map resultMap = entity.getBody();
    System.out.println(resultMap);
}

/\*\*

* post请求 */ @Test public void test2() { Map resultMap = restTemplate.postForObject( "http://localhost:9001/order", new Order(1, "赣南脐橙", 48.8, 10), Map.class);

    // 响应码
    System.out.println(resultMap);
}

/\*\*

* put请求

avatar
文章
阅读
粉丝