java.lang.ClassNotFoundException: 在路径上未找到类 “com.sun.mail.util.MailLogger”。

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英文:

java.lang.ClassNotFoundException: Didn't find class "com.sun.mail.util.MailLogger" on path:

问题

以下是翻译好的内容：

ForgotPasswordAcivity.java

  1. public class ForgotPasswordActivity extends AppCompatActivity {
  3.     EditText getNumberEditText;
  5.     int generatedNumber;
  7.     protected void sendEmail() {
  8.         
  9.         Random random = new Random();
  10.         generatedNumber = random.nextInt(10000 - 1001) + 1001;
  12.         new Thread(new Runnable() {
  14.             @Override
  15.             public void run() {
  16.                 try {
  17.                     GMailSender sender = new GMailSender("sample@gmail.com",
  18.                             "1234");
  19.                     sender.sendMail("更改密码的代码 - Stairways to Solutions", "您的代码是 " + generatedNumber,
  20.                             "sample@gmail.com", "user@gmail.com");
  21.                 } catch (Exception e) {
  22.                     Log.e("SendMail", e.getMessage(), e);
  23.                 }
  24.             }
  26.         }).start();
  27.     }
  29.     public void send(View view){
  31.         sendEmail();
  33.     }
  35.     public void check(View view){
  37.         if (getNumberEditText.getText().toString().equals(Integer.toString(generatedNumber))){
  39.             Toast.makeText(this, "给出了正确的代码！", Toast.LENGTH_SHORT).show();
  41.         } else {
  43.             Toast.makeText(this, "请检查代码", Toast.LENGTH_SHORT).show();
  45.         }
  47.     }
  49.     @Override
  50.     protected void onCreate(Bundle savedInstanceState) {
  51.         super.onCreate(savedInstanceState);
  52.         setContentView(R.layout.activity_forgot_password);
  54.         getNumberEditText = findViewById(R.id.getNumberEditText);
  55.     }
  56. }

GMailSender.java

  1. class GMailSender extends javax.mail.Authenticator {
  2.     private String mailhost = "smtp.gmail.com"; // 邮件服务器的主机名，用于连接发送邮件的SMTP服务器。
  3.     private String user;
  4.     private String password;
  5.     private Session session;
  7.     static {
  8.         Security.addProvider(new JSSEProvider());
  9.     }
  11.     public GMailSender(String user, String password) {
  12.         this.user = user; // 您的SMTP用户名。对于GMail SMTP，这将是您的GMail电子邮件地址。
  13.         this.password = password; // 您的SMTP密码。对于GMail SMTP，这将是您的GMail密码。
  15.         Properties props = new Properties();
  16.         props.setProperty("mail.transport.protocol", "smtp");
  17.         props.setProperty("mail.host", mailhost);
  18.         props.put("mail.smtp.auth", "true");
  19.         props.put("mail.smtp.port", "465");
  20.         props.put("mail.smtp.socketFactory.port", "465");
  21.         props.put("mail.smtp.socketFactory.class", "javax.net.ssl.SSLSocketFactory");
  22.         props.put("mail.smtp.socketFactory.fallback", "false");
  23.         props.setProperty("mail.smtp.quitwait", "false");
  25.         session = Session.getDefaultInstance(props, this);
  26.     }
  28.     protected PasswordAuthentication getPasswordAuthentication() {
  29.         return new PasswordAuthentication(user, password);
  30.     }
  32.     public synchronized void sendMail(String subject, String body,
  33.                                       String sender, String recipients) throws Exception {
  34.         MimeMessage message = new MimeMessage(session);
  35.         DataHandler handler = new DataHandler(new ByteArrayDataSource(body.getBytes(), "text/plain"));
  36.         message.setSender(new InternetAddress(sender));
  37.         message.setSubject(subject);
  38.         message.setDataHandler(handler);
  40.         if (recipients.indexOf(',') > 0)
  41.             message.setRecipients(Message.RecipientType.TO, InternetAddress.parse(recipients));
  42.         else
  43.             message.setRecipient(Message.RecipientType.TO, new InternetAddress(recipients));
  45.         Transport.send(message);
  46.     }
  47. }

JSSEProvider.java

  1. /*
  2.  *  Licensed to the Apache Software Foundation (ASF) under one or more
  3.  *  contributor license agreements.  See the NOTICE file distributed with
  4.  *  this work for additional information regarding copyright ownership.
  5.  *  The ASF licenses this file to You under the Apache License, Version 2.0
  6.  *  (the "License"); you may not use this file except in compliance with
  7.  *  the License.  You may obtain a copy of the License at
  8.  *
  9.  *     http://www.apache.org/licenses/LICENSE-2.0
  10.  *
  11.  *  Unless required by applicable law or agreed to in writing, software
  12.  *  distributed under the License is distributed on an "AS IS" BASIS,
  13.  *  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  14.  *  See the License for the specific language governing permissions and
  15.  *  limitations under the License.
  16.  */
  18. /*
  19.  * @author Alexander Y. Kleymenov
  20.  * @version $Revision$
  21.  */
  22. import java.security.AccessController;
  23. import java.security.Provider;
  25. public final class JSSEProvider extends Provider {
  27.     public JSSEProvider() {
  28.         super("HarmonyJSSE", 1.0, "Harmony JSSE Provider");
  29.         AccessController.doPrivileged(new java.security.PrivilegedAction<Void>() {
  30.             public Void run() {
  31.                 put("SSLContext.TLS",
  32.                         "org.apache.harmony.xnet.provider.jsse.SSLContextImpl");
  33.                 put("Alg.Alias.SSLContext.TLSv1", "TLS");
  34.                 put("KeyManagerFactory.X509",
  35.                         "org.apache.harmony.xnet.provider.jsse.KeyManagerFactoryImpl");
  36.                 put("TrustManagerFactory.X509",
  37.                         "org.apache.harmony.xnet.provider.jsse.TrustManagerFactoryImpl");
  38.                 return null;
  39.             }
  40.         });
  41.     }
  42. }

build.gradle:Project

  1. apply plugin: 'com.android.application'
  3. android {
  4.     compileSdkVersion 29
  5.     buildToolsVersion '28.0.3'
  7.     defaultConfig {
  8.         applicationId "com.luv.stairwaystosolutions"
  9.         minSdkVersion 23
  10.         targetSdkVersion 29
  11.         versionCode 1
  12.         versionName "1.0"
  13.         testInstrumentationRunner "androidx.test.runner.AndroidJUnitRunner"
  14.         multiDexEnabled true
  15.     }
  16.     dexOptions {
  17.         javaMaxHeapSize "4g"
  18.     }
  19.     buildTypes {
  20.         release {
  21.             minifyEnabled true
  23.             proguardFiles getDefaultProguardFile('proguard-android.txt'), 'proguard-rules.pro'
  24.         }
  25.     }
  26. }
  28. dependencies {
  29.     implementation 'androidx.appcompat:appcompat:1.0.0'
  30.     implementation 'com.parse.bolts:bolts-tasks:1.4.0'
  31.     implementation 'com.parse:parse-android:1.17.3'
  32.     implementation 'androidx.multidex:multidex:2.0.0'
  33.     implementation 'androidx.constraintlayout:constraintlayout:1.1.3'
  34.     implementation 'com.google.android.material:material:1.0.0-beta01'
  35.     implementation 'javax.mail:javax.mail-api:1.5.3'
  36. }
  37. configurations.all {
  38.     resolutionStrategy.eachDependency { DependencyResolveDetails details ->
  39.         def requested = details.requested
  40.         if (requested.group == 'com.android.support') {
  41.             if (!requested.name.startsWith("multidex")) {
  42.                 details.useVersion '25.3.1'
  43.             }
  44.         }
  45.     }
  46. }

build.gradle:Module

  1. // Top-level build file where you can add configuration options common to all sub-projects/modules.
  2. buildscript {
  3.     repositories {
  4.         mavenCentral()
  5.         jcenter()
  6.         google()
  7.         maven {
  8.             url 'https://maven.google.com/'
  9.             name 'Google'
  10.         }
  11.     }
  12.     dependencies {
  13.         classpath '
  15. <details>
  16. <summary>英文:</summary>
  18. I am making an app in which an email will be sent to user&#39;s gmail id when a button is clicked. This is the following code of needed classes.
  20. **ForgotPasswordAcivity.java**
  22.         public class ForgotPasswordActivity extends AppCompatActivity {
  23.     
  24.         EditText getNumberEditText;
  25.     
  26.         int generatedNumber;
  27.     
  28.         protected void sendEmail() {
  29.             
  30.             Random random = new Random();
  31.             generatedNumber = random.nextInt(10000 - 1001) + 1001;
  32.     
  33.             new Thread(new Runnable() {
  34.     
  35.                 @Override
  36.                 public void run() {
  37.                     try {
  38.                         GMailSender sender = new GMailSender(&quot;sample@gmail.com&quot;,
  39.                                 &quot;1234&quot;);
  40.                         sender.sendMail(&quot;Code for Changing Password in Stairways to Solutions&quot;, &quot;Your Code is &quot; + generatedNumber,
  41.                                 &quot;sample@gmail.com&quot;, &quot;user@gmail.com&quot;);
  42.                     } catch (Exception e) {
  43.                         Log.e(&quot;SendMail&quot;, e.getMessage(), e);
  44.                     }
  45.                 }
  46.     
  47.             }).start();
  48.         }
  49.     
  50.         public void send(View view){
  51.     
  52.             sendEmail();
  53.     
  54.         }
  55.     
  56.         public void check(View view){
  57.     
  58.             if (getNumberEditText.getText().toString().equals(Integer.toString(generatedNumber))){
  59.     
  60.                 Toast.makeText(this, &quot;Correct Number given!&quot;, Toast.LENGTH_SHORT).show();
  61.     
  62.             } else {
  63.     
  64.                 Toast.makeText(this, &quot;Check the Number&quot;, Toast.LENGTH_SHORT).show();
  65.     
  66.             }
  67.     
  68.         }
  69.     
  70.         @Override
  71.         protected void onCreate(Bundle savedInstanceState) {
  72.             super.onCreate(savedInstanceState);
  73.             setContentView(R.layout.activity_forgot_password);
  74.     
  75.             getNumberEditText = findViewById(R.id.getNumberEditText);
  76.         }
  77.     }
  79. **GMailSender.java**
  81.         class GMailSender extends javax.mail.Authenticator {
  82.         private String mailhost = &quot;smtp.gmail.com&quot;; //Hostname of the SMTP mail server which you want to connect for sending emails.
  83.         private String user;
  84.         private String password;
  85.         private Session session;
  86.     
  87.         static {
  88.             Security.addProvider(new JSSEProvider());
  89.         }
  90.     
  91.         public GMailSender(String user, String password) {
  92.             this.user = user; //Your SMTP username. In case of GMail SMTP this is going to be your GMail email address.
  93.             this.password = password; //Your SMTP password. In case of GMail SMTP this is going to be your GMail password.
  94.     
  95.             Properties props = new Properties();
  96.             props.setProperty(&quot;mail.transport.protocol&quot;, &quot;smtp&quot;);
  97.             props.setProperty(&quot;mail.host&quot;, mailhost);
  98.             props.put(&quot;mail.smtp.auth&quot;, &quot;true&quot;);
  99.             props.put(&quot;mail.smtp.port&quot;, &quot;465&quot;);
  100.             props.put(&quot;mail.smtp.socketFactory.port&quot;, &quot;465&quot;);
  101.             props.put(&quot;mail.smtp.socketFactory.class&quot;, &quot;javax.net.ssl.SSLSocketFactory&quot;);
  102.             props.put(&quot;mail.smtp.socketFactory.fallback&quot;, &quot;false&quot;);
  103.             props.setProperty(&quot;mail.smtp.quitwait&quot;, &quot;false&quot;);
  104.     
  105.             session = Session.getDefaultInstance(props, this);
  106.         }
  107.     
  108.         protected PasswordAuthentication getPasswordAuthentication() {
  109.             return new PasswordAuthentication(user, password);
  110.         }
  111.     
  112.         public synchronized void sendMail(String subject, String body,
  113.                                           String sender, String recipients) throws Exception {
  114.             MimeMessage message = new MimeMessage(session);
  115.             DataHandler handler = new DataHandler(new ByteArrayDataSource(body.getBytes(), &quot;text/plain&quot;));
  116.             message.setSender(new InternetAddress(sender));
  117.             message.setSubject(subject);
  118.             message.setDataHandler(handler);
  119.     
  120.             if (recipients.indexOf(&#39;,&#39;) &gt; 0)
  121.                 message.setRecipients(Message.RecipientType.TO, InternetAddress.parse(recipients));
  122.             else
  123.                 message.setRecipient(Message.RecipientType.TO, new InternetAddress(recipients));
  124.     
  125.             Transport.send(message);
  126.         }
  127.     }
  129. **JSSEProvider.java**
  131.         /*
  132.      *  Licensed to the Apache Software Foundation (ASF) under one or more
  133.      *  contributor license agreements.  See the NOTICE file distributed with
  134.      *  this work for additional information regarding copyright ownership.
  135.      *  The ASF licenses this file to You under the Apache License, Version 2.0
  136.      *  (the &quot;License&quot;); you may not use this file except in compliance with
  137.      *  the License.  You may obtain a copy of the License at
  138.      *
  139.      *     http://www.apache.org/licenses/LICENSE-2.0
  140.      *
  141.      *  Unless required by applicable law or agreed to in writing, software
  142.      *  distributed under the License is distributed on an &quot;AS IS&quot; BASIS,
  143.      *  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  144.      *  See the License for the specific language governing permissions and
  145.      *  limitations under the License.
  146.      */
  147.     
  148.     /*
  149.      * @author Alexander Y. Kleymenov
  150.      * @version $Revision$
  151.      */
  152.     import java.security.AccessController;
  153.     import java.security.Provider;
  154.     
  155.     public final class JSSEProvider extends Provider {
  156.     
  157.         public JSSEProvider() {
  158.             super(&quot;HarmonyJSSE&quot;, 1.0, &quot;Harmony JSSE Provider&quot;);
  159.             AccessController.doPrivileged(new java.security.PrivilegedAction&lt;Void&gt;() {
  160.                 public Void run() {
  161.                     put(&quot;SSLContext.TLS&quot;,
  162.                             &quot;org.apache.harmony.xnet.provider.jsse.SSLContextImpl&quot;);
  163.                     put(&quot;Alg.Alias.SSLContext.TLSv1&quot;, &quot;TLS&quot;);
  164.                     put(&quot;KeyManagerFactory.X509&quot;,
  165.                             &quot;org.apache.harmony.xnet.provider.jsse.KeyManagerFactoryImpl&quot;);
  166.                     put(&quot;TrustManagerFactory.X509&quot;,
  167.                             &quot;org.apache.harmony.xnet.provider.jsse.TrustManagerFactoryImpl&quot;);
  168.                     return null;
  169.                 }
  170.             });
  171.         }
  172.     }
  174. build.gradle:Project
  176.    
  178.      apply plugin: &#39;com.android.application&#39;
  179.     
  180.     android {
  181.         compileSdkVersion 29
  182.         buildToolsVersion &#39;28.0.3&#39;
  183.     
  184.         defaultConfig {
  185.             applicationId &quot;com.luv.stairwaystosolutions&quot;
  186.             minSdkVersion 23
  187.             targetSdkVersion 29
  188.             versionCode 1
  189.             versionName &quot;1.0&quot;
  190.             testInstrumentationRunner &quot;androidx.test.runner.AndroidJUnitRunner&quot;
  191.             multiDexEnabled true
  192.         }
  193.         dexOptions {
  194.             javaMaxHeapSize &quot;4g&quot;
  195.         }
  196.         buildTypes {
  197.             release {
  198.                 minifyEnabled true
  199.     
  200.                 proguardFiles getDefaultProguardFile(&#39;proguard-android.txt&#39;), &#39;proguard-rules.pro&#39;
  201.             }
  202.         }
  203.     }
  204.     
  205.     dependencies {
  206.         implementation &#39;androidx.appcompat:appcompat:1.0.0&#39;
  207.         implementation &#39;com.parse.bolts:bolts-tasks:1.4.0&#39;
  208.         implementation &#39;com.parse:parse-android:1.17.3&#39;
  209.         implementation &#39;androidx.multidex:multidex:2.0.0&#39;
  210.         implementation &#39;androidx.constraintlayout:constraintlayout:1.1.3&#39;
  211.         implementation &#39;com.google.android.material:material:1.0.0-beta01&#39;
  212.         implementation &#39;javax.mail:javax.mail-api:1.5.3&#39;
  213.     }
  214.     configurations.all {
  215.         resolutionStrategy.eachDependency { DependencyResolveDetails details -&gt;
  216.             def requested = details.requested
  217.             if (requested.group == &#39;com.android.support&#39;) {
  218.                 if (!requested.name.startsWith(&quot;multidex&quot;)) {
  219.                     details.useVersion &#39;25.3.1&#39;
  220.                 }
  221.             }
  222.         }
  223.     }
  225. build.gradle:Module
  227.    
  229.      // Top-level build file where you can add configuration options common to all sub-projects/modules.
  230.     buildscript {
  231.         repositories {
  232.             mavenCentral()
  233.             jcenter()
  234.             google()
  235.             maven {
  236.                 url &#39;https://maven.google.com/&#39;
  237.                 name &#39;Google&#39;
  238.             }
  239.         }
  240.         dependencies {
  241.             classpath &#39;com.android.tools.build:gradle:3.5.4&#39;
  242.         }
  243.     }
  244.     
  245.     allprojects {
  246.         repositories {
  247.             mavenCentral()
  248.             maven {
  249.                 url &#39;https://maven.google.com/&#39;
  250.                 name &#39;Google&#39;
  251.             }
  252.         }
  253.     }
  254.     
  255.     ext {
  256.         compileSdkVersion = 27
  257.         buildToolsVersion = &quot;27.0.3&quot;
  258.     
  259.         minSdkVersion = 14
  260.         targetSdkVersion = 23
  261.     }
  263. I have added the activation.jar, additional.jar and mail.jar in libs folder.
  265. [![libs Folder][1]][1]
  267. Error :
  269.     2020-09-21 19:13:36.868 16758-16809/com.luv.stairwaystosolutions E/AndroidRuntime: FATAL EXCEPTION: Thread-2
  270.     Process: com.luv.stairwaystosolutions, PID: 16758
  271.     java.lang.NoClassDefFoundError: Failed resolution of: Lcom/sun/mail/util/MailLogger;
  272.         at javax.mail.Session.initLogger(Session.java:226)
  273.         at javax.mail.Session.&lt;init&gt;(Session.java:210)
  274.         at javax.mail.Session.getDefaultInstance(Session.java:321)
  275.         at com.luv.stairwaystosolutions.GMailSender.&lt;init&gt;(GMailSender.java:38)
  276.         at com.luv.stairwaystosolutions.ForgotPasswordActivity$1.run(ForgotPasswordActivity.java:33)
  277.         at java.lang.Thread.run(Thread.java:761)
  278.      Caused by: java.lang.ClassNotFoundException: Didn&#39;t find class &quot;com.sun.mail.util.MailLogger&quot; on path: DexPathList[[zip file &quot;/data/app/com.luv.stairwaystosolutions-1/base.apk&quot;],nativeLibraryDirectories=[/data/app/com.luv.stairwaystosolutions-1/lib/x86_64, /system/lib64, /vendor/lib64]]
  279.         at dalvik.system.BaseDexClassLoader.findClass(BaseDexClassLoader.java:56)
  280.         at java.lang.ClassLoader.loadClass(ClassLoader.java:380)
  281.         at java.lang.ClassLoader.loadClass(ClassLoader.java:312)
  282.         at javax.mail.Session.initLogger(Session.java:226)&#160;
  283.         at javax.mail.Session.&lt;init&gt;(Session.java:210)&#160;
  284.         at javax.mail.Session.getDefaultInstance(Session.java:321)&#160;
  285.         at com.luv.stairwaystosolutions.GMailSender.&lt;init&gt;(GMailSender.java:38)&#160;
  286.         at com.luv.stairwaystosolutions.ForgotPasswordActivity$1.run(ForgotPasswordActivity.java:33)&#160;
  287.         at java.lang.Thread.run(Thread.java:761)&#160;
  289. This is the error line :
  291.     session = Session.getDefaultInstance(props, this);
  294. Thank you in advance for help.
  297.   [1]: https://i.stack.imgur.com/Gf5Jd.png
  299. </details>
  302. # 答案1
  303. **得分**: 1
  305. **build.gradle:Project**
  307. ```gradle
  308. apply plugin: 'com.android.application'
  310. android {
  311.     compileSdkVersion 29
  312.     buildToolsVersion '28.0.3'
  314.     defaultConfig {
  315.         applicationId "com.luv.stairwaystosolutions"
  316.         minSdkVersion 23
  317.         targetSdkVersion 29
  318.         versionCode 1
  319.         versionName "1.0"
  320.         testInstrumentationRunner "androidx.test.runner.AndroidJUnitRunner"
  321.         multiDexEnabled true
  322.     }
  323.     dexOptions {
  324.         javaMaxHeapSize "4g"
  325.     }
  326.     buildTypes {
  327.         release {
  328.             minifyEnabled true
  330.             proguardFiles getDefaultProguardFile('proguard-android.txt'), 'proguard-rules.pro'
  331.         }
  332.     }
  333. }
  335. dependencies {
  336.     implementation 'androidx.appcompat:appcompat:1.0.0'
  337.     implementation 'com.parse.bolts:bolts-tasks:1.4.0'
  338.     implementation 'com.parse:parse-android:1.17.3'
  339.     implementation 'androidx.multidex:multidex:2.0.0'
  340.     implementation 'androidx.constraintlayout:constraintlayout:1.1.3'
  341.     implementation 'com.google.android.material:material:1.0.0-beta01'
  342.     implementation 'javax.mail:javax.mail-api:1.5.3'
  343.     implementation group: 'com.sun.mail', name: 'javax.mail', version: '1.6.2' 
  344. }
  345. configurations.all {
  346.     resolutionStrategy.eachDependency { DependencyResolveDetails details ->
  347.         def requested = details.requested
  348.         if (requested.group == 'com.android.support') {
  349.             if (!requested.name.startsWith("multidex")) {
  350.                 details.useVersion '25.3.1'
  351.             }
  352.         }
  353.     }
  354. }
英文:

build.gradle:Project

  1. apply plugin: &#39;com.android.application&#39;
  2. android {
  3. compileSdkVersion 29
  4. buildToolsVersion &#39;28.0.3&#39;
  5. defaultConfig {
  6. applicationId &quot;com.luv.stairwaystosolutions&quot;
  7. minSdkVersion 23
  8. targetSdkVersion 29
  9. versionCode 1
  10. versionName &quot;1.0&quot;
  11. testInstrumentationRunner &quot;androidx.test.runner.AndroidJUnitRunner&quot;
  12. multiDexEnabled true
  13. }
  14. dexOptions {
  15. javaMaxHeapSize &quot;4g&quot;
  16. }
  17. buildTypes {
  18. release {
  19. minifyEnabled true
  20. proguardFiles getDefaultProguardFile(&#39;proguard-android.txt&#39;), &#39;proguard-rules.pro&#39;
  21. }
  22. }
  23. }
  24. dependencies {
  25. implementation &#39;androidx.appcompat:appcompat:1.0.0&#39;
  26. implementation &#39;com.parse.bolts:bolts-tasks:1.4.0&#39;
  27. implementation &#39;com.parse:parse-android:1.17.3&#39;
  28. implementation &#39;androidx.multidex:multidex:2.0.0&#39;
  29. implementation &#39;androidx.constraintlayout:constraintlayout:1.1.3&#39;
  30. implementation &#39;com.google.android.material:material:1.0.0-beta01&#39;
  31. implementation &#39;javax.mail:javax.mail-api:1.5.3&#39;
  32. implementation group: &#39;com.sun.mail&#39;, name: &#39;javax.mail&#39;, version: &#39;1.6.2&#39; 
  33. }
  34. configurations.all {
  35. resolutionStrategy.eachDependency { DependencyResolveDetails details -&gt;
  36. def requested = details.requested
  37. if (requested.group == &#39;com.android.support&#39;) {
  38. if (!requested.name.startsWith(&quot;multidex&quot;)) {
  39. details.useVersion &#39;25.3.1&#39;
  40. }
  41. }
  42. }
  43. }

huangapple
  • 本文由 发表于 2020年9月21日 21:47:31
  • 转载请务必保留本文链接：https://go.coder-hub.com/63993643.html
  • android
  • java
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