springboot炖restTemplate

1. 先睹为快

2. 实现原理

2.1 新建项目

2.2 创建maven目录结构，以及pom.xml文件

2.3 pom.xml文件中加入依赖

<parent>
    <groupId>org.springframework.boot</groupId>
    <artifactId>spring-boot-starter-parent</artifactId>
    <version>2.0.5.RELEASE</version>
    <relativePath/>
</parent>

2.4 pom.xml文件中加入springboot-starter依赖

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

2.5 pom.xml文件中加入maven-springboot打包插件

<build>
    <plugins>
        <plugin>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-maven-plugin</artifactId>
        </plugin>
    </plugins>
</build>

2.6 开发启动类

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

@SpringBootApplication
public class Application {

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

}

2.7 开发restTemplate配置类

import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import org.springframework.http.client.ClientHttpRequestFactory;
import org.springframework.http.client.SimpleClientHttpRequestFactory;
import org.springframework.http.converter.StringHttpMessageConverter;
import org.springframework.web.client.RestTemplate;

import java.nio.charset.StandardCharsets;

@Configuration
public class RestTemplateConfig {

    @Bean
    public RestTemplate restTemplate(ClientHttpRequestFactory factory) {
        RestTemplate restTemplate = new RestTemplate(factory);
        restTemplate.getMessageConverters().set(1, new StringHttpMessageConverter(StandardCharsets.UTF_8));
        return restTemplate;
    }

    @Bean
    public ClientHttpRequestFactory simpleClientHttpRequestFactory() {
        SimpleClientHttpRequestFactory factory = new SimpleClientHttpRequestFactory();
        factory.setReadTimeout(5000); // 单位为ms
        factory.setConnectTimeout(5000); // 单位为ms
        return factory;
    }

}

2.8 开发测出控制器

import org.springframework.util.LinkedMultiValueMap;
import org.springframework.util.MultiValueMap;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RestController;
import org.springframework.web.client.RestTemplate;

import javax.annotation.Resource;

@RestController
public class DemoController {

    @Resource
    private RestTemplate restTemplate;

    @RequestMapping("/get")
    public String get() {
        String url = "http://localhost:8080/get?id={id}&uname={uname}&pwd={pwd}&age={age}";
        return restTemplate.getForObject(url, String.class, 1, "Oven", "123456", 18);
    }

    @RequestMapping("/post")
    public String post() {
        MultiValueMap<String, String> params = new LinkedMultiValueMap<>();
        params.add("id", "1");
        params.add("uname", "Oven");
        params.add("pwd", "123456");
        params.add("age", "18");
        return restTemplate.postForObject("http://localhost:8080/post", params, String.class);
    }

}

2.9 编译打包运行

3. 应用场景