1配置Java環(huán)境
將你電腦的Java環(huán)境變量配置成AndroidStudio的所使用的Java環(huán)境备徐，為什么要配置版姑？這方便等會(huì)添加證書的時(shí)候是針對(duì)AndroidStudio所使用的Java環(huán)境（注意：如果你電腦已經(jīng)配置好了JAVA_HOME摸屠，我仍然建議你暫時(shí)先配置成AndroidStudio的Java環(huán)境帆吻，因?yàn)椴煌腏ava版本證書可能是不一致的展运，截止發(fā)教程前最新的AndroidStudio3.5.5版本您访，使用的仍是Java8铅忿，但我看到有些人的電腦已經(jīng)配置到Java11了，如果你已經(jīng)配置了灵汪，請(qǐng)暫時(shí)先記錄下檀训，然后刪除，等你修復(fù)好AndroidStudio之后享言，再配置回來）
（1）將AndroidStudio里的jre配置成JAVA_HOME變量
打開環(huán)境變量：此電腦->屬性->高級(jí)系統(tǒng)設(shè)置->高級(jí)->環(huán)境變量
配置環(huán)境變量：系統(tǒng)變量新建JAVA_HOME峻凫，輸入AndroidStudio目錄下Java的環(huán)境變量，然后確定保存（如圖所示）
然后編輯一下Path環(huán)境變量览露，在Path環(huán)境變量分別加入%JAVA_HOME%\bin和%JAVA_HOME%\lib（如圖所示）
（2）使用cmd檢查當(dāng)前的java環(huán)境荧琼，輸入where java可查到j(luò)ava.exe所在位置
C:\Users\Administrator>where java
D:\AndroidStudio\jre\bin\java.exe
C:\Users\Administrator>
2.安裝證書
2.1桌面新建一個(gè)文件夾cert，在里面新建一個(gè)文件InstallCert.java代碼如下
/*
* 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.*;
import java.security.*;
import java.security.cert.*;
import javax.net.ssl.*;
public class InstallCert {
public static void main(String[] args) throws Exception {
String host = "10.0.31.32"; //輸入服務(wù)端地址
int port = 443; //輸入服務(wù)端端口 一般默認(rèn)443
String p = "changeit"; //一般默認(rèn)changeit
char[] passphrase = p.toCharArray();
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);
}
}
}
2.2修改代碼
- 在本例中差牛，我在桌面新建了一個(gè)Cert文件夾命锄，我把InstallCert.java放到了Cert文件夾中，便于修改和管理
- 修改InstallCert.java代碼中"10.0.31.32"為你在AndroidStudio中無法驗(yàn)證證書的域名偏化，改完后應(yīng)該是下面這樣的
String host = "jcenter.bintray.com"; //輸入服務(wù)端地址
int port = 443; //輸入服務(wù)端端口 一般默認(rèn)443
（注意脐恩，你的可能是"dl.google.com"或者是"d29vzk4ow07wi7.cloudfront.net"，具體的需要看它報(bào)錯(cuò)的域名夹孔，如果你是第一次安裝，請(qǐng)一次性加完三個(gè)域名再進(jìn)行后面的操作析孽，也就是你需要進(jìn)行三次javac和三次java命令搭伤，這樣出錯(cuò)的概率會(huì)非常低）
2.3獲取證書
-
當(dāng)你修改好并保存文件之后，使用cmd進(jìn)入到桌面的Cert目錄袜瞬，輸入命令javac InstallCert.java怜俐，然后按回車來編譯它
2.4替換證書文件
<meta charset="utf-8">
打開AndroidStudio的安裝目錄痹扇，進(jìn)入到j(luò)re->jre->lib->security里铛漓，將cacerts重命名成cacerts1溯香，然后把jssecacerts拷貝到當(dāng)前目錄，并命名成cacerts
3.刷新AndroidStudio緩存浓恶，使配置生效
回到AndroidStudio玫坛，選擇“File -> Invalidate Caches / Restart”，這個(gè)時(shí)候包晰，AndroidStudio會(huì)自動(dòng)重啟湿镀，如果你的Gradle進(jìn)程沒有再運(yùn)行，并且運(yùn)行按鈕是灰色的杜窄，請(qǐng)點(diǎn)擊“File -> Sync Project with Gradle Files”
到這一步肠骆，問題基本已經(jīng)解決【請(qǐng)注意，如果你Invalidate Caches / Restart之后塞耕，還遇到這個(gè)問題蚀腿，你應(yīng)該查看錯(cuò)誤的域名是不是變了，一般是變成你沒添加過的域名扫外，例如：你添加了jcenter.bintrary.com莉钙，但你做完以上操作之后，錯(cuò)誤的域名變成dl.google.com或者d29vzk4ow07wi7.cloudfront.net筛谚，那么你需要再次添加其它域名的證書磁玉，一般出現(xiàn)這個(gè)錯(cuò)誤，那么你通常是要進(jìn)行三次添加證書操作驾讲，然后三次Invalidate Caches / Restart才能解決蚊伞，如果依舊錯(cuò)誤，可能是操作有誤吮铭，可以加我Q群?jiǎn)枂柟逼龋缬卸鄠€(gè)java環(huán)境，可能會(huì)導(dǎo)致你卡在無法使用java InstallCert命令】（完）
作者：Analyas
鏈接：http://www.reibang.com/p/89ca5b635d3f
來源：簡(jiǎn)書
著作權(quán)歸作者所有谓晌。商業(yè)轉(zhuǎn)載請(qǐng)聯(lián)系作者獲得授權(quán)掠拳，非商業(yè)轉(zhuǎn)載請(qǐng)注明出處。
