Question

我有这个方法：

public static boolean isValidEmailAddress(String email) {
       boolean result = true;
       try {
          InternetAddress emailAddr = new InternetAddress(email);
          emailAddr.validate();
       } catch (AddressException ex) {
          result = false;
       }
       return result;
}

但是这给了我这个例外：

java.lang.NullPointerException at javax.mail.internet.AddressParser.tokenizeAddress（AddressParser.java:645）在 javax.mail.internet.AddressParser.parseAddress（AddressParser.java:113）在 javax.mail.internet.InternetAddress。（InternetAddress.java:70）在 javax.mail.internet.InternetAddress。（InternetAddress.java:61）在controller.CtrlUser.isValidEmailAddress（CtrlUser.java:166）at controller.CtrlSeller.register（CtrlSeller.java：41）at testController.CtrlSellerUnitTestCase.testRegister（CtrlSellerUnitTestCase.java:41） at sun.reflect.NativeMethodAccessorImpl.invoke0（Native Method）at sun.reflect.NativeMethodAccessorImpl.invoke（NativeMethodAccessorImpl.java:39）在 sun.reflect.DelegatingMethodAccessorImpl.invoke（DelegatingMethodAccessorImpl.java:25）在java.lang.reflect.Method.invoke（Method.java:597）at org.junit.runners.model.FrameworkMethod $ 1.runReflectiveCall（FrameworkMethod.java:45）在 org.junit.internal.runners.model.ReflectiveCallable.run（ReflectiveCallable.java:15）在 org.junit.runners.model.FrameworkMethod.invokeExplosively（FrameworkMethod.java:42）在 org.junit.internal.runners.statements.InvokeMethod.evaluate（InvokeMethod.java:20）在 org.junit.internal.runners.statements.RunBefores.evaluate（RunBefores.java:28）在 org.junit.internal.runners.statements.RunAfters.evaluate（RunAfters.java:30）在org.junit.runners.ParentRunner.runLeaf（ParentRunner.java:263）at org.junit.runners.BlockJUnit4ClassRunner.runChild（BlockJUnit4ClassRunner.java:68）在 org.junit.runners.BlockJUnit4ClassRunner.runChild（BlockJUnit4ClassRunner.java:47）在org.junit.runners.ParentRunner $ 3.run（ParentRunner.java:231）at org.junit.runners.ParentRunner $ 1.schedule（ParentRunner.java:60）at org.junit.runners.ParentRunner.runChildren（ParentRunner.java:229）....

Answer 1

它适用于我 - 检查你是否实际传递了一个有效的字符串。您似乎发送了null作为电子邮件参数

Answer 2

确保您传递的电子邮件参数不为空

Answer 3

请尝试以下代码：

java.net.IDN.toASCII    

public static boolean isValidEmail(String email) {
    boolean result = true;
    try {
        InternetAddress emailAddr = new InternetAddress(java.net.IDN.toASCII(email));
        emailAddr.validate();
    } catch (AddressException ex) {
        result = false;
    }
    System.out.println("==> "+result+" : "+email);
    return result;
}

Java - 使用InternetAddress验证电子邮件

3 个答案: