                        課程
                    
                        /后端開發(fā)
                        
                            /Java
                        
                        /Spring Boot 發(fā)送郵件

啟動(dòng)之后，一直報(bào)空指針異常

sendMessageTest(com.neo.helloWord.service.ServiceTest)? Time elapsed: 0.026 sec? <<< ERROR!

java.lang.NullPointerException: null

at com.neo.helloWord.hello.MailService.sendSimpleMail(MailService.java:34)

at com.neo.helloWord.service.ServiceTest.sendMessageTest(ServiceTest.java:26)

2019-04-03 16:06:14.461? INFO 5236 --- [? ? ? ?Thread-2] o.s.w.c.s.GenericWebApplicationContext? ?: Closing org.springframework.web.context.support.GenericWebApplicationContext@26275bef: startup date [Wed Apr 03 16:06:10 CST 2019]; root of context hierarchy

Results :

Tests in error:?

? ServiceTest.sendMessageTest:26 ? NullPointer

lhw901013

2019-04-03

源自：Spring Boot 發(fā)送郵件 2-4

關(guān)注問(wèn)題我要回答

1589

操作

收起

3 回答

qq_虛偽的宋痞子_0
2019-06-03

請(qǐng)問(wèn)這個(gè)問(wèn)題解決了嗎

java.lang.NullPointerException

報(bào)的是這個(gè)錯(cuò)誤，下面是代碼內(nèi)容

try{
????Hello?h?=?new?Hello();
????h.SimpleEmail("shizengs@aliyun.com",?"This?is?Subject",?"This?is?Content");
}catch?(Exception?e){
????System.out.println(e);
}

@RestController
public?class?Hello?{
????@Value("${spring.mail.username}")
????private?String?from;

????@Autowired
????private?JavaMailSender?mailSender;

????@RequestMapping(value="/sendEmail",?method?=?RequestMethod.GET)
????public?void?SimpleEmail(String?to,?String?subject,?String?content){
????????SimpleMailMessage?simpleMailMessage?=?new?SimpleMailMessage();
????????simpleMailMessage.setTo(to);
????????simpleMailMessage.setSubject(subject);
????????simpleMailMessage.setText(content);
????????simpleMailMessage.setFrom(from);
????????mailSender.send(simpleMailMessage);
????}

}