当我使用crud操作保存员工时，它工作正常，但是一旦我调用此方法： mailSender.send（消息）; 我收到500错误。
我应该在使用crud操作保存员工时，一旦保存，然后将自动回复邮件发送给对应的员工？
/*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
答案 0 :(得分：0)
对于mailSender，您缺少 ADD INDEX test_table_composite_idx (foo, bar)。
应该是
@Autowired