Java - 使用 InternetAddress 验证电子邮件
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Java - validate email with InternetAddress
提问by Jerome Ansia
I got this method:
我得到了这个方法：
public static boolean isValidEmailAddress(String email) {
boolean result = true;
try {
InternetAddress emailAddr = new InternetAddress(email);
emailAddr.validate();
} catch (AddressException ex) {
result = false;
}
return result;
}
but that give me this exception:
但这给了我这个例外：
java.lang.NullPointerException at javax.mail.internet.AddressParser.tokenizeAddress(AddressParser.java:645) at javax.mail.internet.AddressParser.parseAddress(AddressParser.java:113) at javax.mail.internet.InternetAddress.(InternetAddress.java:70) at javax.mail.internet.InternetAddress.(InternetAddress.java:61) at 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) at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25) at java.lang.reflect.Method.invoke(Method.java:597) at org.junit.runners.model.FrameworkMethod$1.runReflectiveCall(FrameworkMethod.java:45) at org.junit.internal.runners.model.ReflectiveCallable.run(ReflectiveCallable.java:15) at org.junit.runners.model.FrameworkMethod.invokeExplosively(FrameworkMethod.java:42) at org.junit.internal.runners.statements.InvokeMethod.evaluate(InvokeMethod.java:20) at org.junit.internal.runners.statements.RunBefores.evaluate(RunBefores.java:28) at org.junit.internal.runners.statements.RunAfters.evaluate(RunAfters.java:30) at org.junit.runners.ParentRunner.runLeaf(ParentRunner.java:263) at org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:68) at org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:47) at 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) ....
java.lang.NullPointerException at javax.mail.internet.AddressParser.tokenizeAddress(AddressParser.java:645) at javax.mail.internet.AddressParser.parseAddress(AddressParser.java:113) at javax.mail.internet.InternetAddress.(InternetAddress) .java:70) at javax.mail.internet.InternetAddress.(InternetAddress.java:61) at 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) at sun.reflect.DelegatingMethodAccessorImplatingMethod:AccessorImplatingMethod:Invoke0(Native Method) 25) 在 java.lang.reflect.Method.invoke(Method.java:597) 在 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) at org.junit.internal.runners.statements.InvokeMethod.evaluate(InvokeMethod.java:20) at 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) 在 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) 在 org.junit.runners.ParentRunner$1.schedule(ParentRunner.java:60) 在 org.junit.runners.ParentRunner.runChildren(ParentRunner.java:229) ....
回答by Tom G
It works for me- check to see if you are actually passing a valid string. It appears you are sending null as your email parameter
它对我有用 - 检查你是否真的传递了一个有效的字符串。看来您正在发送 null 作为您的电子邮件参数
回答by Dungeon Hunter
make sure that the email parameter you are passing is not null
确保您传递的电子邮件参数不为空
回答by fdurmus77
Try following code:
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;
}
