RestTemplate系统间的调用

项目结构

配置文件

1. 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.xiaoge.demo</groupId>
   	<artifactId>http-demo</artifactId>
   	<version>0.0.1-SNAPSHOT</version>
   	<packaging>jar</packaging>
   
   	<name>http-demo</name>
   	<description>Demo project for Spring Boot</description>
   
   	<parent>
   		<groupId>org.springframework.boot</groupId>
   		<artifactId>spring-boot-starter-parent</artifactId>
   		<version>2.0.4.RELEASE</version>
   		<relativePath/> <!-- lookup parent from repository -->
   	</parent>
   
   	<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</artifactId>
   		</dependency>
   
   		<dependency>
   			<groupId>org.springframework.boot</groupId>
   			<artifactId>spring-boot-starter-test</artifactId>
   			<scope>test</scope>
   		</dependency>
   
   		<dependency>
   			<groupId>org.apache.httpcomponents</groupId>
   			<artifactId>httpclient</artifactId>
   			<version>4.5.2</version>
   		</dependency>
   
   		<dependency>
   			<groupId>org.springframework.boot</groupId>
   			<artifactId>spring-boot-starter-web</artifactId>
   		</dependency>
   	</dependencies>
   
   	<build>
   		<plugins>
   			<plugin>
   				<groupId>org.springframework.boot</groupId>
   				<artifactId>spring-boot-maven-plugin</artifactId>
   			</plugin>
   		</plugins>
   	</build>
   
   
   </project>
   

实体类

1. User

   package com.xiaoge.httpdemo.pojo;
   
   import java.io.Serializable;
   import java.util.Date;
   
   public class User implements Serializable {
   
       private static final long serialVersionUID = 1L;
   
       private Long id;
   
       // 用户名
       private String userName;
   
       // 密码
       private String password;
   
       // 姓名
       private String name;
   
       // 年龄
       private Integer age;
   
       // 性别，1男性，2女性
       private Integer sex;
   
       // 出生日期
       private Date birthday;
   
       // 创建时间
       private Date created;
   
       // 更新时间
       private Date updated;
   
       // 备注
       private String note;
   
       public Long getId() {
           return id;
       }
   
       public void setId(Long id) {
           this.id = id;
       }
   
       public String getUserName() {
           return userName;
       }
   
       public void setUserName(String userName) {
           this.userName = userName;
       }
   
       public String getPassword() {
           return password;
       }
   
       public void setPassword(String password) {
           this.password = password;
       }
   
       public String getName() {
           return name;
       }
   
       public void setName(String name) {
           this.name = name;
       }
   
       public Integer getAge() {
           return age;
       }
   
       public void setAge(Integer age) {
           this.age = age;
       }
   
       public Integer getSex() {
           return sex;
       }
   
       public void setSex(Integer sex) {
           this.sex = sex;
       }
   
       public Date getBirthday() {
           return birthday;
       }
   
       public void setBirthday(Date birthday) {
           this.birthday = birthday;
       }
   
       public Date getCreated() {
           return created;
       }
   
       public void setCreated(Date created) {
           this.created = created;
       }
   
       public Date getUpdated() {
           return updated;
       }
   
       public void setUpdated(Date updated) {
           this.updated = updated;
       }
   
       public String getNote() {
           return note;
       }
   
       public void setNote(String note) {
           this.note = note;
       }
   
       @Override
       public String toString() {
           return "User [id=" + id + ", userName=" + userName + ", password="
                   + password + ", name=" + name + ", age=" + age + ", sex=" + sex
                   + ", birthday=" + birthday + ", created=" + created
                   + ", updated=" + updated + ", note=" + note + "]";
       }
   }
   
   

引导类(重点)

1. HttpDemoApplication

   package com.xiaoge.httpdemo;
   
   import org.springframework.boot.SpringApplication;
   import org.springframework.boot.autoconfigure.SpringBootApplication;
   import org.springframework.context.annotation.Bean;
   import org.springframework.web.client.RestTemplate;
   
   @SpringBootApplication
   public class HttpDemoApplication {
   
   	public static void main(String[] args) {
   		SpringApplication.run(HttpDemoApplication.class, args);
   	}
   
   	@Bean
   	public RestTemplate restTemplate() {
   		return new RestTemplate(); // 空参数, 默认是HttpUrlConnection
   	}
   }
   
   

测试(重点)

1. HttpDemoApplicationTests

   package com.xiaoge.httpdemo;
   
   import com.xiaoge.httpdemo.pojo.User;
   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.test.context.junit4.SpringRunner;
   import org.springframework.web.client.RestTemplate;
   
   @RunWith(SpringRunner.class)
   @SpringBootTest(classes = HttpDemoApplication.class)
   public class HttpDemoApplicationTests {
   
   	@Autowired
   	private RestTemplate restTemplate;
   
   	@Test
   	public void httpGet() {
   		// 第一个参数是访问地址, 第二个参数是你要拿的对象字节码
   		User user = restTemplate.getForObject("http://localhost:8088/user/1", User.class);
   		System.out.println(user);
   	}
   
   }