我正在使用spring form验证来验证我的表单输入字段。我遇到了BindingResult的问题，即使我的输入字段为null / empty，我仍然返回false.i管理所有导入和一切都看起来很好。但正如我所说，我的验证不起作用，需要帮助解决这个问题......
形式：
<%@include file="././Header.jsp"%>
<%@ taglib prefix="spring" uri="http://www.springframework.org/tags"%>
<%@ taglib prefix="c" uri="http://java.sun.com/jsp/jstl/core"%>
<%@ taglib prefix="form" uri="http://www.springframework.org/tags/form"%>
<script src="<c:url value="/js/smlibray/emailCommunicate.js"/>"></script>
<link href="<c:url value="/js/jquery-ui.css"/>" rel="stylesheet" />
<script src="<c:url value="/js/jquery-ui.js"/>"></script>
<input type="hidden" name="applicationUrl" id="applicationUrl"
value="${pageContext.request.contextPath}">
<div class="container sec-container middle-sec">
<div class="form-fields row">
<div class="col-md-12 col-sm-12 col-xs-12">
<form:form class="form-horizontal policy-form" id="emailCommu-form" method="POST" action="sendEmailMessage" commandName="emailForm">
<div class="form-group">
<h1 class="email-header">SiteMidner Email Notification</h1>
<c:choose>
<c:when test="${not empty sMsg}">
<div class="email-Commu-SMsg">* ${sMsg}</div>
</c:when>
<c:otherwise>
<c:if test="${not empty eMsg}">
<div class="email-Commu-EMsg">* ${eMsg}</div>
</c:if>
</c:otherwise>
</c:choose>
<div class="form-emailCommu">
<label for="emailSub-txtArea" class="email-ContentHead">Enter
the Subject Line for the Email : </label>
<div class="email-sm-textDiv">
<form:textarea path="emailSubject" name="emailSubject" id="emailSubTxtArea"
placeholder="Email Subject"/>
</div>
<span><form:errors path="emailSubject" cssClass="error" /></span>
</div>
<div class="form-emailCommu">
<label for="emailBod-txtArea" class="email-ContentHead">Enter
the Message Body for the Email : </label>
<div class="email-sm-textDiv">
<form:textarea path="emailMsg" name="emailMsg" id="emailBodyTxtArea"
placeholder="Email Body"/>
</div>
<span><form:errors path="emailMsg" cssClass="error" /></span>
</div>
<div class="email-sendButton">
<input type="submit" class="styled-button" value="Send Email"></input>
</div>
</div>
</form:form>
</div>
<!--form-fields close -->
</div>
</div>
控制器代码：
@RequestMapping(value="/sendEmailMessage",method=RequestMethod.POST)
public ModelAndView sendEmailCommunication(@Valid @ModelAttribute("emailForm") EmailReqInfo emailInfo,BindingResult result,HttpServletRequest request){
ModelAndView view = null;
StringBuffer sMsg = new StringBuffer();
StringBuffer eMsg = new StringBuffer();
boolean isAdmin = false;
try{
String loggedInUser = request.getHeader("sm_user").trim();
isAdmin = getUserAdminRights(request);
if(result.hasErrors()){
view = new ModelAndView("EmailCommunication");
view.addObject("isAdmin", isAdmin);
return view;
}
else{
String emailSubject = emailInfo.getEmailSubject();
String emailMsg = emailInfo.getEmailMsg().replace("\n", "<br />\n");
boolean status = emailService.sendEmailCommuncation(emailSubject,emailMsg);
if(status){
sMsg.append(" Sending SiteMinder Notification Email was Success.");
}
else{
eMsg.append(" Oops! Something went wrong while sending Email Notification. Pls check logs");
}
}
}
catch(Exception ex){
ex.printStackTrace();
eMsg.append("Oops! Something went wrong while sending Email Notification. Pls check logs");
}
view = new ModelAndView("EmailCommunication");
view.addObject("emailForm", new EmailReqInfo());
view.addObject("isAdmin", isAdmin);
view.addObject("sMsg", sMsg.toString());
view.addObject("eMsg", eMsg.toString());
return view;
}
电子邮件型号：
import javax.validation.constraints.NotNull;
import javax.validation.constraints.Size;
import org.hibernate.validator.constraints.NotEmpty;
public class EmailReqInfo
{
@NotNull @NotEmpty
@Size(min=1)
private String emailSubject;
@NotNull @NotEmpty
private String emailMsg;
public String getEmailSubject() {
return emailSubject;
}
public void setEmailSubject(String emailSubject) {
this.emailSubject = emailSubject;
}
public String getEmailMsg() {
return emailMsg;
}
public void setEmailMsg(String emailMsg) {
this.emailMsg = emailMsg;
}
}
我在spring-mvc.xml中有必要的注释
<mvc:annotation-driven>
<mvc:message-converters register-defaults="false">
<bean id="jacksonMessageConverter"
class="org.springframework.http.converter.json.MappingJackson2HttpMessageConverter"/>
</mvc:message-converters>
</mvc:annotation-driven>
修复验证所需的帮助。谢谢
答案 0 :(得分：2)
@NotNull ：检查该值是否为空，忽略内容。
@NotEmpty ：检查该值是否为空，也不为空。如果它只有空格，则允许它不为空。
@NotBlank ：检查值是否为空还是空，首先修剪该值。这意味着，它不会只允许空格
因此，如果您想验证某个字段不是null，而且它不只有空格而是文本，那么您应该使用@NotBlank。
这个例子正在运行，尝试做同样的事情：
<强>实体：
@Entity
@Table(name="EMPLOYEE")
public class Employee {
@Id
@GeneratedValue(strategy = GenerationType.IDENTITY)
private int id;
@Size(min=3, max=50)
@Column(name = "NAME", nullable = false)
private String name;
@NotNull
@DateTimeFormat(pattern="dd/MM/yyyy")
@Column(name = "JOINING_DATE", nullable = false)
@Type(type="org.jadira.usertype.dateandtime.joda.PersistentLocalDate")
private LocalDate joiningDate;
@NotNull
@Digits(integer=8, fraction=2)
@Column(name = "SALARY", nullable = false)
private BigDecimal salary;
@NotEmpty
@Column(name = "SSN", unique=true, nullable = false)
private String ssn;
//getter & setter
}
<强>控制器：
@RequestMapping(value = { "/new" }, method = RequestMethod.POST)
public String saveEmployee(@Valid Employee employee, BindingResult result,
ModelMap model) {
if (result.hasErrors()) {
return "registration";
}
service.saveEmployee(employee);
model.addAttribute("success", "Employee " + employee.getName() + " registered successfully");
return "success";
}
<强> registation.jsp
<h2>Registration Form</h2>
<form:form method="POST" modelAttribute="employee">
<form:input type="hidden" path="id" id="id"/>
<table>
<tr>
<td><label for="name">Name: </label> </td>
<td><form:input path="name" id="name"/></td>
<td><form:errors path="name" cssClass="error"/></td>
</tr>
<tr>
<td><label for="joiningDate">Joining Date: </label> </td>
<td><form:input path="joiningDate" id="joiningDate"/></td>
<td><form:errors path="joiningDate" cssClass="error"/></td>
</tr>
<tr>
<td><label for="salary">Salary: </label> </td>
<td><form:input path="salary" id="salary"/></td>
<td><form:errors path="salary" cssClass="error"/></td>
</tr>
<tr>
<td><label for="ssn">SSN: </label> </td>
<td><form:input path="ssn" id="ssn"/></td>
<td><form:errors path="ssn" cssClass="error"/></td>
</tr>
<tr>
<td colspan="3">
<c:choose>
<c:when test="${edit}">
<input type="submit" value="Update"/>
</c:when>
<c:otherwise>
<input type="submit" value="Register"/>
</c:otherwise>
</c:choose>
</td>
</tr>
</table>
</form:form>
答案 1 :(得分：0)
我看到Hibernate Validators的问题。 @NotEmpty无论如何都在@NotNull之上。
尝试从表单中删除@NotEmpty验证限制，然后再次执行。