spring RestTemplate 工程导入

spring 提供了RestTemplate的工具类对 httpclient，okhttp，Jdk UrlConnection 三中http 客户端封装。

RestTemplate 使用：

@RunWith(SpringRunner.class)
@SpringBootTest
public class DemoRestTemplateTests {

    @Autowired
    private RestTemplate restTemplate;

    @Test
    public void test(){
        String url = "http://localhost/user/8";
        //对json 反序列化
        User user = restTemplate.getForObject(url, User.class);
        System.out.println(user.toString());
    }

}

相应的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 https://maven.apache.org/xsd/maven-4.0.0.xsd">
    <modelVersion>4.0.0</modelVersion>
    <groupId>com.spring.cloud</groupId>
    <artifactId>demo</artifactId>
    <version>0.0.1-SNAPSHOT</version>
    <name>RestTemplateDemo</name>
    <description>Demo project for Spring Boot</description>

    <parent>
        <artifactId>spring-boot-starter-parent</artifactId>
        <groupId>org.springframework.boot</groupId>
        <version>2.3.5.RELEASE</version>
    </parent>

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

    <dependencies>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter</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>
<!--            <scope>test</scope>-->
<!--            <exclusions>-->
<!--                <exclusion>-->
<!--                    <groupId>org.junit.vintage</groupId>-->
<!--                    <artifactId>junit-vintage-engine</artifactId>-->
<!--                </exclusion>-->
<!--            </exclusions>-->
        </dependency>

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