Question

addEmployee.jsp

<form:form id="bookForm" modelAttribute="employee" method="post" action="${baseURL}employee/saveemployee" class="form-horizontal" enctype="multipart/form-data">


  <div class="form-group">
    <label for="publishedOn" class="col-xs-4 control-label">Birth Date
    </label>
    <div class="col-xs-8">
      <form:input path="personalInformation.dateOfBirth" placeholder="yyyy-MM-dd" class="datepicker form-control" />
      <form:errors path="personalInformation.dateOfBirth"></form:errors>
    </div>
  </div>
  <div class="form-group">
    <label for="dateOfJoining" class="col-xs-4 control-label">Date Of Joining</label>
    <div class="col-xs-8">
      <form:input path="dateOfJoining" placeholder="dateOfJoining" class="form-control" />
      <form:errors path="dateOfJoining"></form:errors>

    </div>
  </div>
</form:form>

这是jsp表单，我必须验证日期字段每当我点击保存按钮时，它都会给出空指针异常。

2）EmployeeAddController.java

@RequestMapping(value="/saveemployee",method = RequestMethod.POST)
public String saveEmployee(@ModelAttribute("employee")Employee employee,BindingResult result,Errors e,ModelMap map){ 


        employeeValidatorobj.validate(employee,e);
        if(e.hasErrors())
        {
            map.addAttribute("employee",employee);
            return "addEmployee";
        }

        else{
    System.out.println("inside save");
      System.out.println(employee.getPersonalInformation().getFirstName());
         map.addAttribute("employee",new Employee());    

       iEmployeeService.saveEmployee(employee);
        map.addAttribute("message", "EmployeeAdded sucessfully");
       return "employeeList";   
    }
    }

这是控制器，我正在检查表单是否有错误。

3）emolyeeValidator.java

public class EmployeeValidator implements Validator {

private Pattern pattern;
private Matcher matcher;


private static final String DATE_PATTERN="((?:19|20)\\d\\d)/(0?[1-9]|1[012])/([12][0-9]|3[01]|0?[1-9])";
@Override
public boolean supports(Class<?> arg0) {

    return Employee.class.equals(arg0);
}

@Override
public void validate(Object obj, Errors errors) {

        // Employee employee=new Employee();
    Employee employee = (Employee) obj;


       String date=employee.getDateOfJoining().toString();
       if (!date.matches(DATE_PATTERN)) {

           pattern=pattern.compile(DATE_PATTERN);
           matcher=pattern.matcher(date);
           if(matcher.matches()){
               errors.rejectValue("dateOfJoining", "dateOfJoining.incorrect","enter correct dateOfJoining");
           }

    }

这是employeeValidator类，用于日期的客户验证，但是当我尝试保存记录时，它会给出空指针exception.i还映射了bean中的employeevalidator。每当我尝试使用.equals（）字符串方法进行验证时，它会给出jsp页面字符串上的异常无法转换为java.util.Date.please检查代码并建议我如何在employeeValidator中检查日期格式的条件（YYYY-MM-DD）

如何在不使用Annotation的情况下以spring形式验证日期格式？

0 个答案: