以下包含我的控制器类中的代码，我使用方法 public String getRegistrationForm(Map model) 返回一个带有弹簧表单的 jsp 页面，在这个方法中我设置 userTab.setIsMfaEnabled(new Boolean(true)) ，在提交表单时，方法： public String registerUser(@ModelAttribute("user") UserTab user , BindingResult results , Map model) 被调用作为处理程序方法，但在此方法中，用户属性的属性“isMfaEnabled”设置在以前的方法是 null 并且行：System.out.println("user.getIsMfaEnabled() is nul"); 正在日志中打印。请告诉我这里有什么问题。
@Controller
@RequestMapping("/register")
public class RegisterUserController {
@Autowired
RegisterUserService registerUserService;
@RequestMapping(value = "/registeruser.action" , method = RequestMethod.POST)
public String registerUser(@ModelAttribute("user") UserTab user , BindingResult results , Map<String,Object> model){
System.out.println("executing regsiterUser ");
if(user == null)
System.out.println(", user is null");
if(results == null)
System.out.println("results is null");
UserTabValiator userTabValidator = new UserTabValiator();
if(user.getIsMfaEnabled() == null)
System.out.println("user.getIsMfaEnabled() is nul");
userTabValidator.validate(user, results);
if(results.hasErrors()){
return "registeruser";
}
try {
boolean val = registerUserService.isExistingUsername(user.getLoginName());
if(val){
System.out.println("username already exists");
model.put("message", "username already exists");
return "registeruser";
}
if(!val){
model.put("username", user.getLoginName());
model.put("message", "registration success ... ");
return "registrationsuccess";
}
} catch (Exception e) {
System.out.println("exception thrown");
e.printStackTrace();
return "errorpage";
}
return "errorpage";
}
@RequestMapping(value="/registeruser.view", method=RequestMethod.GET)
public String getRegistrationForm(Map<String,Object> model){
System.out.println("executing getRegistrationForm");
if(registerUserService == null)
System.out.println("register user service is null");
try{
ArrayList<MfaQuestion> allMfaQuestions = (ArrayList<MfaQuestion>) registerUserService.getAllMfaQuestions();
UserTab userTab = new UserTab();
userTab.setIsMfaEnabled(true);
model.put("user", userTab);
model.put("message", "register new user");
model.put("allMfaQuestions", allMfaQuestions);
return "registeruser";
}
catch(Exception e){
e.printStackTrace();
model.put("user", new UserTab());
model.put("message", "unable to get MFA questions");
return "registeruser";
}
}
}
UserTab 模型类：包 com.persistance.beans；
import java.util.Date;
public class UserTab {
private Integer userTabID;
private String loginName;
private String password;
private Date created;
private Date lastUpdated;
private Date lastLoginAttempt;
private Boolean isAccountLocked;
private Integer loginFailsNumber;
private Boolean isMfaEnabled;
private UserMfaMap userMfaMap;
public String toString(){
String str ="";
System.out.println("[userTabID , loginName , password");
return str;
}
public UserMfaMap getUserMfaMap() {
return userMfaMap;
}
public void setUserMfaMap(UserMfaMap userMfaMap) {
this.userMfaMap = userMfaMap;
}
public UserTab() {
super();
}
public String getLoginName() {
return loginName;
}
public void setLoginName(String loginName) {
this.loginName = loginName;
}
public String getPassword() {
return password;
}
public void setPassword(String password) {
this.password = password;
}
public Date getCreated() {
return created;
}
public void setCreated(Date created) {
this.created = created;
}
public Date getLastUpdated() {
return this.lastUpdated;
}
public void setLastUpdated(Date lastUpdated) {
this.lastUpdated = lastUpdated;
}
public Date getLastLoginAttempt() {
return lastLoginAttempt;
}
public void setLastLoginAttempt(Date lastLoginAttempt) {
this.lastLoginAttempt = lastLoginAttempt;
}
public Boolean getIsAccountLocked() {
return isAccountLocked;
}
public void setIsAccountLocked(Boolean isAccountLocked) {
this.isAccountLocked = isAccountLocked;
}
public Integer getLoginFailsNumber() {
return loginFailsNumber;
}
public void setLoginFailsNumber(Integer loginFailsNumber) {
this.loginFailsNumber = loginFailsNumber;
}
public Boolean getIsMfaEnabled() {
return isMfaEnabled;
}
public void setIsMfaEnabled(Boolean isMfaEnabled) {
this.isMfaEnabled = isMfaEnabled;
}
public Integer getUserTabID() {
return userTabID;
}
public void setUserTabID(Integer userTabID) {
this.userTabID = userTabID;
}
}
RegisterUser JSP 页面：
<form:form method="POST" action="${pageContext.request.contextPath}/register/registeruser.action" commandName ="user">
<table>
<tr>
<td><form:label path="loginName">UserName</form:label></td>
<td><form:input path="loginName" /></td>
<form:errors path="loginName" cssClass="error"/>
</tr>
<tr>
<td><form:label path="password">Password</form:label></td>
<td><form:input path="password" /></td>
<form:errors path="password" cssClass="error"/>
</tr>
<div id="question1" class="questionblock">
<tr>
<form:select path="userMfaMap.question1" >
<c:forEach items="${allMfaQuestions}" var="mfaQuestion">
<form:option value="${mfaQuestion.mfaQuestionId}">
<c:out value="${mfaQuestion.mfaQuestion}" />
</form:option>
</c:forEach>
</form:select>
</tr>
<tr>
<td><form:label path="userMfaMap.answer1">Answer:</form:label></td>
<td><form:input path="userMfaMap.answer1" /></td>
<form:errors path="userMfaMap.answer1" cssClass="error"/>
</tr>
</div>
<div id="question2" class="questionblock">
<tr>
<form:select path="userMfaMap.question2">
<c:forEach items="${allMfaQuestions}" var="mfaQuestion">
<form:option value="${mfaQuestion.mfaQuestionId}">
<c:out value="${mfaQuestion.mfaQuestion}" />
</form:option>
</c:forEach>
</form:select>
</tr>
<tr>
<td><form:label path="userMfaMap.answer2">Answer:</form:label></td>
<td><form:input path="userMfaMap.answer2" /></td>
<form:errors path="userMfaMap.answer2" cssClass="error"/>
</tr>
</div>
<div id="question3" class="questionblock">
<tr>
<form:select path="userMfaMap.question3">
<c:forEach items="${allMfaQuestions}" var="mfaQuestion">
<form:option value="${mfaQuestion.mfaQuestionId}">
<c:out value="${mfaQuestion.mfaQuestion}" />
</form:option>
</c:forEach>
</form:select>
</tr>
<tr>
<td><form:label path="userMfaMap.answer3">Answer:</form:label></td>
<td><form:input path="userMfaMap.answer3" /></td>
<form:errors path="userMfaMap.answer3" cssClass="error"/>
</tr>
</div>
<tr>
<td><input type="submit" name="submit" value="Submit"></td>
</tr>
</table>
</form:form>