\"Package org.apache.hc.httpclient5.conn.ssl does not exist\" Spring Boot 升级答案

【问题标题】："Package org.apache.hc.httpclient5.conn.ssl does not exist" on Spring Boot upgrade\"Package org.apache.hc.httpclient5.conn.ssl does not exist\" Spring Boot 升级
【发布时间】：2023-02-23 04:18:43
【问题描述】：

我不得不升级 Spring Boot 依赖项2.7.5 --> 3.0.2:

<parent>
    <groupId>org.springframework.boot</groupId>
    <artifactId>spring-boot-starter-parent</artifactId>
    <version>3.0.2</version>
    <relativePath />
</parent>

pom.xml 目前引用了一个相对较新的版本 HttpClient，4.5.3:

    <dependency>
        <groupId>org.apache.httpcomponents</groupId>
        <artifactId>httpclient</artifactId>
        <version>4.5.3</version>
    </dependency>

该代码使用 org.apache.http 类，现在在 Maven Build 上产生以下错误：

import org.apache.http.conn.ssl.SSLConnectionSocketFactory;
import org.apache.http.conn.ssl.TrustSelfSignedStrategy;
import org.apache.http.impl.client.CloseableHttpClient;
import org.apache.http.impl.client.HttpClients;
import org.apache.http.ssl.SSLContextBuilder;

-->不兼容的类型：org.apache.http.impl.client.CloseableHttpClient 无法转换为 org.apache.hc.client5.http.classic.HttpClient

为了解决这个错误，我将所有出现的 org.apache.http 替换为 org.apache.hc.httpclient5 per https://hc.apache.org/httpcomponents-client-5.2.x/migration-guide/migration-to-classic.html ：

import org.apache.hc.httpclient5.conn.ssl.SSLConnectionSocketFactory;
import org.apache.hc.httpclient5.conn.ssl.TrustSelfSignedStrategy;
import org.apache.hc.httpclient5.impl.client.CloseableHttpClient;
import org.apache.hc.httpclient5.impl.client.HttpClients;
import org.apache.hc.httpclient5.ssl.SSLContextBuilder;

但是现在错误是包 org.apache.hc.httpclient5.conn.ssl 不存在.它无法解析 HC5 包。有小费吗？

注意：我还尝试用新的替换 HttpClient 依赖项httpclient5依赖，但它是相同的错误：

<dependency>
    <groupId>org.apache.httpcomponents.client5</groupId>
    <artifactId>httpclient5</artifactId>
    <version>5.2.1</version>
</dependency>

【问题讨论】：

标签： java spring-boot apache-httpclient-4.x apache-httpclient-5.x

【解决方案1】：

org.apache.hc.httpclient5. 导入必须略有不同，如下所示：

import org.apache.hc.client5.http.ssl.SSLConnectionSocketFactory;
import org.apache.hc.client5.http.ssl.TrustSelfSignedStrategy;
import org.apache.hc.core5.ssl.SSLContextBuilder;
import org.apache.hc.client5.http.impl.classic.CloseableHttpClient;
import org.apache.hc.client5.http.impl.classic.HttpClients;

而不是

import org.apache.http.conn.ssl.SSLConnectionSocketFactory;
import org.apache.http.conn.ssl.TrustSelfSignedStrategy;
import org.apache.http.impl.client.CloseableHttpClient;
import org.apache.http.impl.client.HttpClients;
import org.apache.http.ssl.SSLContextBuilder;

【讨论】：