如何解决Spring Boot-使用Java List向多个收件人发送电子邮件不起作用
我正在尝试使用Spring Boot向多个用户发送邮件。尽管未使用Java list
,但是mailRequest.getTo().toString()
中的send
仅适用于一个用户。但是,当我尝试使用Java List
将其发送给多个收件人时,显示错误。我使用的是SMTP
服务器,并且授权连接为true
。
我从swagger用户界面输入的json是:
"fromEmail": "******@Webmail.abc","fullName": "Your Name","message": "Hello,this is a test email sending from Our App","subject": "Greetings","to": [
"XXXXXXX@gmail.com","XXXXXXX@gmail.com"
]
错误日志:
org.springframework.mail.MailParseException: Could not parse mail; nested exception is javax.mail.internet.AddressException: Missing ']' in string ``[Ljava.lang.String;@6d38bf8'' at position 27
at org.springframework.mail.javamail.JavaMailSenderImpl.send(JavaMailSenderImpl.java:384) ~[spring-context-support-5.2.8.RELEASE.jar:5.2.8.RELEASE]
at org.springframework.mail.javamail.JavaMailSenderImpl.send(JavaMailSenderImpl.java:366) ~[spring-context-support-5.2.8.RELEASE.jar:5.2.8.RELEASE]
at com.mail.app.service.impl.MailerServiceImpl.send(MailerServiceImpl.java:51) ~[main/:na]
at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke0(Native Method) ~[na:na]
at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62) ~[na:na]
at java.base/jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) ~[na:na]
at java.base/java.lang.reflect.Method.invoke(Method.java:566) ~[na:na]
at org.springframework.aop.support.AopUtils.invokeJoinpointUsingReflection(AopUtils.java:344) ~[spring-aop-5.2.8.RELEASE.jar:5.2.8.RELEASE]
at org.springframework.aop.framework.ReflectiveMethodInvocation.invokeJoinpoint(ReflectiveMethodInvocation.java:198) ~[spring-aop-5.2.8.RELEASE.jar:5.2.8.RELEASE]
at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:163) ~[spring-aop-5.2.8.RELEASE.jar:5.2.8.RELEASE]
at org.springframework.aop.interceptor.AsyncExecutionInterceptor.lambda$invoke$0(AsyncExecutionInterceptor.java:115) ~[spring-aop-5.2.8.RELEASE.jar:5.2.8.RELEASE]
at org.springframework.aop.interceptor.AsyncExecutionAspectSupport.lambda$doSubmit$3(AsyncExecutionAspectSupport.java:276) ~[spring-aop-5.2.8.RELEASE.jar:5.2.8.RELEASE]
at java.base/java.util.concurrent.CompletableFuture$AsyncSupply.run(CompletableFuture.java:1700) ~[na:na]
at java.base/java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1128) ~[na:na]
at java.base/java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:628) ~[na:na]
at java.base/java.lang.Thread.run(Thread.java:834) ~[na:na]
Caused by: javax.mail.internet.AddressException: Missing ']'
Caused by: javax.mail.internet.AddressException: Missing ']'
at javax.mail.internet.InternetAddress.parse(InternetAddress.java:984) ~[jakarta.mail-1.6.5.jar:1.6.5]
at javax.mail.internet.InternetAddress.parse(InternetAddress.java:728) ~[jakarta.mail-1.6.5.jar:1.6.5]
at javax.mail.internet.InternetAddress.parse(InternetAddress.java:705) ~[jakarta.mail-1.6.5.jar:1.6.5]
at org.springframework.mail.javamail.MimeMessageHelper.parseAddress(MimeMessageHelper.java:711) ~[spring-context-support-5.2.8.RELEASE.jar:5.2.8.RELEASE]
at org.springframework.mail.javamail.MimeMessageHelper.setTo(MimeMessageHelper.java:597) ~[spring-context-support-5.2.8.RELEASE.jar:5.2.8.RELEASE]
at com.mail.app.service.impl.MailerServiceImpl.lambda$send$1(MailerServiceImpl.java:45) ~[main/:na]
at org.springframework.mail.javamail.JavaMailSenderImpl.send(JavaMailSenderImpl.java:375) ~[spring-context-support-5.2.8.RELEASE.jar:5.2.8.RELEASE]
... 15 common frames omitted
MailController 类:
@RestController
@RequestMapping("/email")
public class MailController {
@Autowired
private MailService mailService;
public MailController(MailService mailService){
this.mailService = mailService;
}
@PostMapping("/send")
@ResponseStatus(HttpStatus.CREATED)
public void send(@RequestBody MailRequest mailRequest){
mailService.send(mailRequest);
}
}
MailRequest类 :(哪一个是从swagger UI中获取json值)
@Data
@FieldDefaults(level = AccessLevel.PRIVATE)
public class MailRequest {
private String fullName;
private List<String> to; // private String to; works
private String fromEmail;
private String subject;
private String message;
//Map<String,String> parameters;
}
MailBuilder 类:
public class MailBuilder {
private Mail mail = new Mail();
public Mail build() {
return mail;
}
public MailBuilder to(String newTo) {
if (mail.getTo() == null) mail.setTo(new ArrayList<>());
mail.getTo().add(newTo);
return this;
}
public MailBuilder from(String newfrom) {
if(mail.getFrom() == null) mail.setFrom(newfrom);
return this;
}
// other codes go here
}
MailService 类:
@Component
public class MailServiceImpl implements MailService {
@Autowired private MailerService mailerService;
@Autowired private MailerConfig mailerConfig;
@Autowired private TemplateEngine templateEngine;
private final String MAIL_TEMPLATE = "mail";
@Override
public void send(MailRequest mailRequest) {
Map<String,Object> body = new HashMap<>();
body.put("fromEmail",mailRequest.getFromEmail());
body.put("message",mailRequest.getMessage());
mailerService.send(new MailBuilder()
.to(mailRequest.getTo().toString())
.from(mailRequest.getFromEmail())
.subject(mailRequest.getSubject())
.body(templateEngine,MAIL_TEMPLATE,body)
.build());
}
}
解决方法
尝试更改to
中的MailBuilder
方法以接受列表。
public MailBuilder to(List<String> emails) {
if (mail.getTo() == null) mail.setTo(new ArrayList<>());
mail.getTo().addAll(emails);
return this;
}
,然后仅将电子邮件列表传递给构建者.to(mailRequest.getTo())
而不是toString()
。
List.toString()
将不会提供可解析的出色输出。可能需要用逗号分隔的电子邮件列表。
尝试做这样的事情
mailerService.send(new MailBuilder()
.to(mailRequest.getTo().stream().collect(Collectors.joining(",")))
.from(mailRequest.getFromEmail())
.subject(mailRequest.getSubject())
.body(templateEngine,MAIL_TEMPLATE,body)
.build());
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