Springboot3.x - RestTemplate和HttpClient结合,和解决RestTemplate乱码问题

一、RestTemplate与HttpClient

1. jar包

<!-- https://mvnrepository.com/artifact/org.apache.httpcomponents.client5/httpclient5 -->
<dependency>
	<groupId>org.apache.httpcomponents.client5</groupId>
	<artifactId>httpclient5</artifactId>
	<version>5.2.1</version>
</dependency>

<dependency>
	<groupId>org.springframework.boot</groupId>
	<artifactId>spring-boot-starter-web</artifactId>
	<version>3.0.0</version>
</dependency>

2. code

package com.hmy.azure.config;

import org.apache.hc.client5.http.impl.classic.CloseableHttpClient;
import org.apache.hc.client5.http.impl.classic.HttpClients;
import org.apache.hc.client5.http.impl.io.PoolingHttpClientConnectionManagerBuilder;
import org.apache.hc.client5.http.ssl.SSLConnectionSocketFactory;
import org.apache.hc.core5.ssl.SSLContexts;
import org.apache.hc.core5.ssl.TrustStrategy;
import org.springframework.context.annotation.Configuration;
import org.springframework.http.client.HttpComponentsClientHttpRequestFactory;
import org.springframework.http.converter.HttpMessageConverter;
import org.springframework.http.converter.StringHttpMessageConverter;
import org.springframework.web.client.RestTemplate;

import javax.net.ssl.SSLContext;
import java.nio.charset.StandardCharsets;
import java.security.KeyManagementException;
import java.security.KeyStoreException;
import java.security.NoSuchAlgorithmException;
import java.util.List;

@Configuration
public class RestTemplateConfig{

    private CloseableHttpClient httpClient;

    public RestTemplate getRestTemplate(){
        RestTemplate restTemplate = new RestTemplate(getRequestFactory());
        //设置字符集
        setCharset(restTemplate);
        return restTemplate;
    }

	//设置字符集为UTF-8, 解决乱码问题
    private void setCharset(RestTemplate restTemplate) {
        List<HttpMessageConverter<?>> messageConverters = restTemplate.getMessageConverters();
        for(HttpMessageConverter messageConverter:messageConverters){
            if(messageConverter instanceof StringHttpMessageConverter){
                ((StringHttpMessageConverter) messageConverter).setDefaultCharset(StandardCharsets.UTF_8);
            }
        }
    }

	//配置SSL, 使用RestTemplate访问https
    public HttpComponentsClientHttpRequestFactory getRequestFactory(){
        TrustStrategy trustStrategy = (x509Certificates, s) -> true;
        try {
            SSLContext sslContext = SSLContexts.custom().loadTrustMaterial(null,trustStrategy).build();
            SSLConnectionSocketFactory socketFactory = new SSLConnectionSocketFactory(sslContext);
            this.httpClient = HttpClients.custom().setConnectionManager(PoolingHttpClientConnectionManagerBuilder
                    .create().setSSLSocketFactory(socketFactory).build()).build();
            HttpComponentsClientHttpRequestFactory requestFactory = new HttpComponentsClientHttpRequestFactory();
            requestFactory.setHttpClient(this.httpClient);
            requestFactory.setConnectionRequestTimeout(5000);
            requestFactory.setConnectTimeout(10000);
            return requestFactory;
        } catch (NoSuchAlgorithmException | KeyManagementException | KeyStoreException e) {
            throw new RuntimeException(e);
        }
    }
}

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