Wie man automatische Antwort gmail unter Verwendung des Frühlinges

Question

anmelde, wenn ich den Angestellten speichere, der crud Operation verwendet, funktioniert sein gut, aber sobald ich diese Methode rufe mailSender.send (Mitteilung); Ich habe 500 error.i sollte sein, wenn ich den Mitarbeiter mit Crud-Operation zu speichern und sobald es gespeichert ist dann automatisch Antwort Mail gesendet wird, um Mitarbeiter zu entsprechen?

/*Employee.class*/ @Entity 
@Table(name = "EMP_TBL") 
public class Employee implements Serializable { 


private static final long serialVersionUID = -3465813074586302847L; 

@Id 
@GeneratedValue(strategy = GenerationType.AUTO) 
private int id; 



@Column 
private String username; 

@Column 
private String firstname; 

@Column 
private String lastname; 

@Lob 
private Blob content; 
public Blob getContent() { 
    return content; 
} 

public void setContent(Blob content) { 
    this.content = content; 
} 

@Column 
private String mobile; 

public String getMobile() { 
    return mobile; 
} 

public void setMobile(String mobile) { 
    this.mobile = mobile; 
} 

@Column 
private String email; 

@Column 
private String payable_amount; 

@Column 
private String plans; 

@Column 
private String id_proof; 



public String getUsername() { 
    return username; 
} 

public void setUsername(String username) { 
    this.username = username; 
} 

public String getFirstname() { 
    return firstname; 
} 

public void setFirstname(String firstname) { 
    this.firstname = firstname; 
} 

public String getLastname() { 
    return lastname; 
} 

public void setLastname(String lastname) { 
    this.lastname = lastname; 
} 

public String getPayable_amount() { 
    return payable_amount; 
} 

public void setPayable_amount(String payable_amount) { 
    this.payable_amount = payable_amount; 
} 

public String getPlans() { 
    return plans; 
} 

public void setPlans(String plans) { 
    this.plans = plans; 
} 

public String getId_proof() { 
    return id_proof; 
} 

public void setId_proof(String id_proof) { 
    this.id_proof = id_proof; 
} 

public int getId() { 
    return id; 
} 

public void setId(int id) { 
    this.id = id; 
} 



public String getEmail() { 
    return email; 
} 

public void setEmail(String email) { 
    this.email = email; 
} 


} 

/*EmployeeService.class*/ 
public interface EmployeeService { 

public void addEmployee(Employee employee); 

public List<Employee> getAllEmployees(); 

public void deleteEmployee(Integer employeeId); 

public Employee getEmployee(int employeeid); 

public Employee updateEmployee(Employee employee); 

public void sendMail(String dear, String content); 

} 
/*EmployeeServiceImpl.class*/ 
@Service 
@Transactional 
public class EmployeeServiceImpl implements EmployeeService { 

@Autowired 
private EmployeeDao employeeDAOImpl; 
Employee Employee; 
private JavaMailSender mailSender; 
private SimpleMailMessage simpleMailMessage; 

@Transactional 
public void setSimpleMailMessage(SimpleMailMessage simpleMailMessage) { 
    this.simpleMailMessage = simpleMailMessage; 
} 

@Transactional 
public void setMailSender(JavaMailSender mailSender) { 
    this.mailSender = mailSender; 
} 
@Transactional 
public void addEmployee(Employee employee) { 
    employeeDAOImpl.addEmployee(employee); 
} 

@Transactional 
public List<Employee> getAllEmployees() { 
    return employeeDAOImpl.getAllEmployees(); 
} 

@Transactional 
public void deleteEmployee(Integer employeeId) { 
    employeeDAOImpl.deleteEmployee(employeeId); 
} 
@Transactional 
public Employee getEmployee(int empid) { 
    return employeeDAOImpl.getEmployee(empid); 
} 
@Transactional 
public Employee updateEmployee(Employee employee) { 

    return employeeDAOImpl.updateEmployee(employee); 
} 
@Transactional 
public void setEmployeeDAO(EmployeeDao employeeDAO) { 
    this.employeeDAOImpl = employeeDAO; 
} 
@Transactional 
public void sendMail(String dear, String content) { 
MimeMessage message = mailSender.createMimeMessage(); 

    try{ 
     MimeMessageHelper helper = new MimeMessageHelper(message, true); 

     helper.setFrom(simpleMailMessage.getFrom()); 
     helper.setTo(Employee.getEmail()); 
     helper.setSubject(simpleMailMessage.getSubject()); 
     helper.setText(String.format(
       simpleMailMessage.getText(), dear, content)); 

     FileSystemResource file = new FileSystemResource("D:\\log.pdf"); 

     helper.addAttachment(file.getFilename(), file); 


    }catch (MessagingException e) { 
     throw new MailParseException(e); 
    } 
    mailSender.send(message); 


    } 

    } 
    /*EmployeeController.class*/ 

    @Controller 
    @RequestMapping("/") 
    public class EmployeeController { 

private static final Logger logger = Logger 
     .getLogger(EmployeeController.class); 

public EmployeeController() { 
    System.out.println("EmployeeController()"); 
} 

@Autowired 
private EmployeeService employeeServiceImpl; 
private JavaMailSender mailSender; 
private MimeMessage message; 

@RequestMapping(value = "/list") 
public ModelAndView listEmployee(ModelAndView model) throws IOException { 
    List<Employee> listEmployee = employeeServiceImpl.getAllEmployees(); 
    model.addObject("listEmployee", listEmployee); 
    model.setViewName("home"); 
    return model; 
} 

**@RequestMapping(value = "/newEmployee", method = RequestMethod.GET) 
public ModelAndView newContact(ModelAndView model) { 
    Employee employee = new Employee(); 

    model.addObject("employee", employee); 
    model.setViewName("EmployeeForm"); 
    mailSender.send(message); 
    return model; 
} 

@RequestMapping(value = "/saveEmployee", method = RequestMethod.POST) 
public ModelAndView saveEmployee(@ModelAttribute Employee employee) { 
    mailSender.send(message); 
    if (employee.getId() == 0) { // if employee id is 0 then creating the 
     // employee other updating the employee 

     employeeServiceImpl.addEmployee(employee); 
    } else { 
     employeeServiceImpl.updateEmployee(employee); 
    } 

    return new ModelAndView("redirect:/list");`enter code here` 
}** 

@RequestMapping(value = "/deleteEmployee", method = RequestMethod.GET) 
public ModelAndView deleteEmployee(HttpServletRequest request) { 
    int employeeId = Integer.parseInt(request.getParameter("id")); 
    employeeServiceImpl.deleteEmployee(employeeId); 
    return new ModelAndView("redirect:/list"); 
} 

@RequestMapping(value = "/editEmployee", method = RequestMethod.GET) 
public ModelAndView editContact(HttpServletRequest request) { 
    int employeeId = Integer.parseInt(request.getParameter("id")); 
    Employee employee = employeeServiceImpl.getEmployee(employeeId); 
    ModelAndView model = new ModelAndView("EmployeeForm"); 

    model.addObject("employee", employee); 

    return model; 
} 
@RequestMapping(value = "/start") 
public String showPdf(Map model) { 


    return "start"; 
} 

@RequestMapping(value = "/contact") 
public String showcontact(Map model) { 


    return "contact"; 
} 
@RequestMapping(value = "/about") 
public String showabout(Map model) { 


    return "about"; 
} 
} 
[I am getting this error while i am save the employee][1] 

Jun 15, 2017 11:25:58 AM org.apache.catalina.core.StandardWrapperValve invoke SEVERE: Servlet.service() for servlet [springmvc-dispatcher] in context with path [/SpringSecurityPasswordEncodingWithBcryptXMLExample] threw exception [Request processing failed; nested exception is java.lang.NullPointerException] with root cause java.lang.NullPointerException at com.websystique.springsecurity.controller.EmployeeController.saveEmployee(EmployeeController.java:56) at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62) at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) at java.lang.reflect.Method.invoke(Method.java:498) at org.springframework.web.method.support.InvocableHandlerMethod.doInvoke(InvocableHandlerMethod.java:221) at org.springframework.web.method.support.InvocableHandlerMethod.invokeForRequest(InvocableHandlerMethod.java:137) at org.springframework.web.servlet.mvc.method.annotation.ServletInvocableHandlerMethod.invokeAndHandle(ServletInvocableHandlerMethod.java:111) at org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter.invokeHandlerMethod(RequestMappingHandlerAdapter.java:806) at org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter.handleInternal(RequestMappingHandlerAdapter.java:729) at org.springframework.web.servlet.mvc.method.AbstractHandlerMethodAdapter.handle(AbstractHandlerMethodAdapter.java:85) at org.springframework.web.servlet.DispatcherServlet.doDispatch(DispatcherServlet.java:959) at org.springframework.web.servlet.DispatcherServlet.doService(DispatcherServlet.java:893) at org.springframework.web.servlet.FrameworkServlet.processRequest(FrameworkServlet.java:970) at org.springframework.web.servlet.FrameworkServlet.doPost(FrameworkServlet.java:872) at javax.servlet.http.HttpServlet.service(HttpServlet.java:648) at org.springframework.web.servlet.FrameworkServlet.service(FrameworkServlet.java:846) at javax.servlet.http.HttpServlet.service(HttpServlet.java:729) at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:292) at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:207) at org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:52) at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:240) at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:207) at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:316) at org.springframework.security.web.access.intercept.FilterSecurityInterceptor.invoke(FilterSecurityInterceptor.java:126) at org.springframework.security.web.access.intercept.FilterSecurityInterceptor.doFilter(FilterSecurityInterceptor.java:90) at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:330) at org.springframework.security.web.access.ExceptionTranslationFilter.doFilter(ExceptionTranslationFilter.java:114) at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:330) at org.springframework.security.web.session.SessionManagementFilter.doFilter(SessionManagementFilter.java:122) at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:330) at org.springframework.security.web.authentication.AnonymousAuthenticationFilter.doFilter(AnonymousAuthenticationFilter.java:111) at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:330) at org.springframework.security.web.servletapi.SecurityContextHolderAwareRequestFilter.doFilter(SecurityContextHolderAwareRequestFilter.java:168) at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:330) at org.springframework.security.web.savedrequest.RequestCacheAwareFilter.doFilter(RequestCacheAwareFilter.java:48) at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:330) at org.springframework.security.web.authentication.www.BasicAuthenticationFilter.doFilterInternal(BasicAuthenticationFilter.java:158) at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:107) at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:330) at org.springframework.security.web.authentication.AbstractAuthenticationProcessingFilter.doFilter(AbstractAuthenticationProcessingFilter.java:205) at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:330) at org.springframework.security.web.authentication.logout.LogoutFilter.doFilter(LogoutFilter.java:120) at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:330) at org.springframework.security.web.csrf.CsrfFilter.doFilterInternal(CsrfFilter.java:120) at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:107) at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:330) at org.springframework.security.web.header.HeaderWriterFilter.doFilterInternal(HeaderWriterFilter.java:64) at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:107) at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:330) at org.springframework.security.web.context.request.async.WebAsyncManagerIntegrationFilter.doFilterInternal(WebAsyncManagerIntegrationFilter.java:53) at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:107) at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:330) at org.springframework.security.web.context.SecurityContextPersistenceFilter.doFilter(SecurityContextPersistenceFilter.java:91) at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:330) at org.springframework.security.web.FilterChainProxy.doFilterInternal(FilterChainProxy.java:213) at org.springframework.security.web.FilterChainProxy.doFilter(FilterChainProxy.java:176) at org.springframework.web.filter.DelegatingFilterProxy.invokeDelegate(DelegatingFilterProxy.java:346) at org.springframework.web.filter.DelegatingFilterProxy.doFilter(DelegatingFilterProxy.java:262) at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:240) at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:207) at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:212) at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:94) at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:504) at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:141) at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:79) at org.apache.catalina.valves.AbstractAccessLogValve.invoke(AbstractAccessLogValve.java:620) at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:88) at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:502) at org.apache.coyote.http11.AbstractHttp11Processor.process(AbstractHttp11Processor.java:1132) at org.apache.coyote.AbstractProtocol$AbstractConnectionHandler.process(AbstractProtocol.java:684) at org.apache.tomcat.util.net.NioEndpoint$SocketProcessor.doRun(NioEndpoint.java:1533) at org.apache.tomcat.util.net.NioEndpoint$SocketProcessor.run(NioEndpoint.java:1489) at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142) at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617) at org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskThread.java:61) at java.lang.Thread.run(Thread.java:745)

[1]: https://i.stack.imgur.com/d27yt.png 

Answer 1

Du fehlt@Autowired für Mailsender.

sollte es

sein

@Autowired 
private JavaMailSender mailSender;