SunCertPathBuilderException: unable to find valid certification path

超、凢脫俗 2023-06-06 07:53 5阅读 0赞

# 问题1 #

> Project build error: Non-resolvable parent POM for com.example:test:0.0.1-SNAPSHOT: Failure to transfer org.springframework.boot:spring-  
> boot-starter-parent:pom:2.1.9.RELEASE from https://repo.maven.apache.org/maven2 was cached in the local repository, resolution will not be  
> reattempted until the update interval of central has elapsed or updates are forced. Original error: Could not transfer artifact  
> org.springframework.boot:spring-boot-starter-parent:pom:2.1.9.RELEASE from/to central (https://repo.maven.apache.org/maven2):  
> sun.security.validator.ValidatorException: PKIX path building failed: sun.security.provider.certpath.SunCertPathBuilderException: unable to find  
> valid certification path to requested target and ‘parent.relativePath’ points at no local POM

![在这里插入图片描述][20191010120641936.png]

## 解决方案1 ##

访问 [https://repo.maven.apache.org/maven2][https_repo.maven.apache.org_maven2] ，由于 https的地址左侧都会有个锁标记（绿色代表有该证书合法，红色代表不合法），点击小锁，弹出对话框。在 “连接”栏，单击右侧箭头，显示连接细节  
![在这里插入图片描述][20191010122416268.png]  
单击“更多信息”，弹出“页面信息”对话框  
!\[在这里插入图片描述\](https://img-blog.csdnimg.cn/20191010122640396.png)切换到“安全”选项卡，点击"查看证书"，弹出"证书查看器"对话框  
![在这里插入图片描述][20191010122713702.png]切换到“详细信息”选项卡，单击“导出”按钮导出证书。  
![在这里插入图片描述][20191010122856497.png]导出的是 crt 后缀的证书文件  
![在这里插入图片描述][20191010134435804.png]  
以管理员身份打开cmd，进入到 C:\\Program Files\\Java\\jdk1.8.0\_201\\jre\\lib\\security 目录下，执行命令 `keytool -keystore cacerts -importcert -alias 【证书文件名】 -file 【crt文件路径】`，这里会要求你输入口令，默认的口令是 changeit。

口令也可以通过 `-storepass changeit` 直接指定  
证书文件别名按照原文件名即可， 我这里重命名了，导致导入不成功

![在这里插入图片描述][20191010142337232.png]  
最后会询问是否信任，直接回车即可。  
![在这里插入图片描述][20191010142755749.png]

## 解决方案2 ##

创建一个 InstallCert.java类，添加如下代码

package javaDemo;
    
    /*
     * Copyright 2006 Sun Microsystems, Inc.  All Rights Reserved.
     *
     * Redistribution and use in source and binary forms, with or without
     * modification, are permitted provided that the following conditions
     * are met:
     *
     *   - Redistributions of source code must retain the above copyright
     *     notice, this list of conditions and the following disclaimer.
     *
     *   - Redistributions in binary form must reproduce the above copyright
     *     notice, this list of conditions and the following disclaimer in the
     *     documentation and/or other materials provided with the distribution.
     *
     *   - Neither the name of Sun Microsystems nor the names of its
     *     contributors may be used to endorse or promote products derived
     *     from this software without specific prior written permission.
     *
     * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS
     * IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
     * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
     * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE COPYRIGHT OWNER OR
     * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
     * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
     * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
     * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
     * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
     * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
     * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
     */
     
    import java.io.BufferedReader;
    import java.io.File;
    import java.io.FileInputStream;
    import java.io.FileOutputStream;
    import java.io.InputStream;
    import java.io.InputStreamReader;
    import java.io.OutputStream;
    import java.security.KeyStore;
    import java.security.MessageDigest;
    import java.security.cert.CertificateException;
    import java.security.cert.X509Certificate;
     
    import javax.net.ssl.SSLContext;
    import javax.net.ssl.SSLException;
    import javax.net.ssl.SSLSocket;
    import javax.net.ssl.SSLSocketFactory;
    import javax.net.ssl.TrustManager;
    import javax.net.ssl.TrustManagerFactory;
    import javax.net.ssl.X509TrustManager;
     
    public class InstallCert {
     
        public static void main(String[] args) throws Exception {
            String host;
            int port;
            char[] passphrase;
            if ((args.length == 1) || (args.length == 2)) {
                String[] c = args[0].split(":");
                host = c[0];
                port = (c.length == 1) ? 443 : Integer.parseInt(c[1]);
                String p = (args.length == 1) ? "changeit" : args[1];
                passphrase = p.toCharArray();
            } else {
                System.out.println("Usage: java InstallCert <host>[:port] [passphrase]");
                return;
            }
     
            File file = new File("jssecacerts");
            if (file.isFile() == false) {
                char SEP = File.separatorChar;
                File dir = new File(System.getProperty("java.home") + SEP + "lib"
                        + SEP + "security");
                file = new File(dir, "jssecacerts");
                if (file.isFile() == false) {
                    file = new File(dir, "cacerts");
                }
            }
            System.out.println("Loading KeyStore " + file + "...");
            InputStream in = new FileInputStream(file);
            KeyStore ks = KeyStore.getInstance(KeyStore.getDefaultType());
            ks.load(in, passphrase);
            in.close();
     
            SSLContext context = SSLContext.getInstance("TLS");
            TrustManagerFactory tmf = TrustManagerFactory
                    .getInstance(TrustManagerFactory.getDefaultAlgorithm());
            tmf.init(ks);
            X509TrustManager defaultTrustManager = (X509TrustManager) tmf
                    .getTrustManagers()[0];
            SavingTrustManager tm = new SavingTrustManager(defaultTrustManager);
            context.init(null, new TrustManager[] { tm }, null);
            SSLSocketFactory factory = context.getSocketFactory();
     
            System.out
                    .println("Opening connection to " + host + ":" + port + "...");
            SSLSocket socket = (SSLSocket) factory.createSocket(host, port);
            socket.setSoTimeout(10000);
            try {
                System.out.println("Starting SSL handshake...");
                socket.startHandshake();
                socket.close();
                System.out.println();
                System.out.println("No errors, certificate is already trusted");
            } catch (SSLException e) {
                System.out.println();
                e.printStackTrace(System.out);
            }
     
            X509Certificate[] chain = tm.chain;
            if (chain == null) {
                System.out.println("Could not obtain server certificate chain");
                return;
            }
     
            BufferedReader reader = new BufferedReader(new InputStreamReader(
                    System.in));
     
            System.out.println();
            System.out.println("Server sent " + chain.length + " certificate(s):");
            System.out.println();
            MessageDigest sha1 = MessageDigest.getInstance("SHA1");
            MessageDigest md5 = MessageDigest.getInstance("MD5");
            for (int i = 0; i < chain.length; i++) {
                X509Certificate cert = chain[i];
                System.out.println(" " + (i + 1) + " Subject "
                        + cert.getSubjectDN());
                System.out.println("   Issuer  " + cert.getIssuerDN());
                sha1.update(cert.getEncoded());
                System.out.println("   sha1    " + toHexString(sha1.digest()));
                md5.update(cert.getEncoded());
                System.out.println("   md5     " + toHexString(md5.digest()));
                System.out.println();
            }
     
            System.out
                    .println("Enter certificate to add to trusted keystore or 'q' to quit: [1]");
            String line = reader.readLine().trim();
            int k;
            try {
                k = (line.length() == 0) ? 0 : Integer.parseInt(line) - 1;
            } catch (NumberFormatException e) {
                System.out.println("KeyStore not changed");
                return;
            }
     
            X509Certificate cert = chain[k];
            String alias = host + "-" + (k + 1);
            ks.setCertificateEntry(alias, cert);
     
            OutputStream out = new FileOutputStream("jssecacerts");
            ks.store(out, passphrase);
            out.close();
     
            System.out.println();
            System.out.println(cert);
            System.out.println();
            System.out
                    .println("Added certificate to keystore 'jssecacerts' using alias '"
                            + alias + "'");
        }
     
        private static final char[] HEXDIGITS = "0123456789abcdef".toCharArray();
     
        private static String toHexString(byte[] bytes) {
            StringBuilder sb = new StringBuilder(bytes.length * 3);
            for (int b : bytes) {
                b &= 0xff;
                sb.append(HEXDIGITS[b >> 4]);
                sb.append(HEXDIGITS[b & 15]);
                sb.append(' ');
            }
            return sb.toString();
        }
     
        private static class SavingTrustManager implements X509TrustManager {
     
            private final X509TrustManager tm;
            private X509Certificate[] chain;
     
            SavingTrustManager(X509TrustManager tm) {
                this.tm = tm;
            }
     
            public X509Certificate[] getAcceptedIssuers() {
                throw new UnsupportedOperationException();
            }
     
            public void checkClientTrusted(X509Certificate[] chain, String authType)
                    throws CertificateException {
                throw new UnsupportedOperationException();
            }
     
            public void checkServerTrusted(X509Certificate[] chain, String authType)
                    throws CertificateException {
                this.chain = chain;
                tm.checkServerTrusted(chain, authType);
            }
        }
    }

在 run configurations 对话框中添加如下配置  
![在这里插入图片描述][20191011095122584.png]运行程序，会打印如下  
![在这里插入图片描述][2019101109522211.png]  
直接回车即可  
![在这里插入图片描述][2019101109595924.png]  
将证书拷贝到$JAVA\_HOME/jre/lib/security目录下，重新编译即可

## 解决方案3 ##

换一个 workspace，新建项目

# 问题2 #

> Failure to transfer org.springframework.boot:spring-boot-maven-plugin:pom:2.1.6.RELEASE from https://repo.maven.apache.org/maven2 was cached in the  
> local repository, resolution will not be reattempted until the update interval of central has elapsed or updates are forced. Original error: Could not transfer  
> artifact org.springframework.boot:spring-boot-maven-plugin:pom:2.1.6.RELEASE from/to central (https://repo.maven.apache.org/maven2):  
> repo.maven.apache.org

# 解决方案 #

上面说明使用的是本地仓库缓存下来的包，但缓存的包有问题，因此只能删除 repository 目录下的所有的包，然后 clean 项目，让其重新构建了。

# 补充 #

如果不是公司装的代理服务器把证书换了导致不能访问。可能是当前版本的JDK太旧了，已不再支持，可以卸载，然后装一个新版的，装完之后重启电脑试试。

jre11 开始，安装 jdk 之后，虽然jdk自带 jre，但目录下却没有原本的 jre 文件夹，这导致很多依赖于 jre 的软件都无法正常运行。可以使用命令 `bin\jlink.exe --module-path jmods --add-modules java.desktop --output jre` 在 jdk 目录下生成 jre 文件夹

[20191010120641936.png]: /images/20230601/e2fcb3804c094613a95808411668c040.png
[https_repo.maven.apache.org_maven2]: https://repo.maven.apache.org/maven2
[20191010122416268.png]: /images/20230601/52ea335f29234ab9b0845957323bbd1d.png
[20191010122713702.png]: /images/20230601/ae065db3b1464711b2809c9710e4d618.png
[20191010122856497.png]: /images/20230601/5807fe655c2f4ff896103705e3a835f8.png
[20191010134435804.png]: /images/20230601/fe95f76c023c4511b22787a19b3aea89.png
[20191010142337232.png]: /images/20230601/2b895d1b837b4098b1db701be9dec80f.png
[20191010142755749.png]: /images/20230601/20d61b6c3714492bb5bac3de027a0d3f.png
[20191011095122584.png]: /images/20230601/4e6bacbfdcb3405ea14fe4b6ecdbbe0b.png
[2019101109522211.png]: /images/20230601/364bcac6aa144b51af58cf714120fcec.png
[2019101109595924.png]: /images/20230601/57c03abb99c84c6cbd78a1b461e4ff22.png