我有一个jsp页面,如下所示:
<form:form action="userRegistration" name="userRegistrationForm" commandName="userRegistration">
<form:input path="userName"/>
<form:input path="houseNo"/>
</form:form>
以及所有必填字段。
在 Controller 中我这样使用:
@RequestMapping(method=RequestMethod.GET)
public String registration(ModelMap model,HttpSession session) {
UserRegistration userRegistration = service.createUserRegistration();
model.addAttribute("userRegistration",userRegistration);
return "registrationview";
}
@RequestMapping(method=RequestMethod.POST)
public String getRegistration(UserRegistration userRegistration, HttpSession session, ModelMap model) {
boolean result = validateAndSaveData(userRegistration);
if (result){
}
}
当用户提交表单时,它会转到帖子,然后验证输入并保存。 如何向 View 发送成功消息和错误消息。现有的实现是否需要进行任何更改?
最佳答案
@RequestMapping(method=RequestMethod.POST)
public String getRegistration(UserRegistration userRegistration, HttpSession session, ModelMap model) {
boolean result = validateAndSaveData(userRegistration);
if (result){
model.addAttribute("successMsg", "Form successfully submitted");
return "successPage";
}
else {
model.addAttribute("errorMsg", "Your form submission contains errors.");
return "formPage";
}
}
我同意 Shagaan 的观点,您应该考虑使用 Spring 对 JSR-303 验证的内置支持来验证表单。以下是有关如何执行此操作的一些信息。首先,使用 JSR-303 (javax.validation) 注释来注释您的表单:
public class UserRegistration {
@NotNull
@Size(max=7)
private String name;
@Min(0)
private int houseNo;
...
}
然后在 Controller 方法中使用“@Valid”注释您的模型:
@RequestMapping(method=RequestMethod.POST)
public String getRegistration(@Valid UserRegistration userRegistration, BindingResult result, HttpSession session, ModelMap model) {
if (result.hasErrors()){
model.addAttribute("errorMsg", "Your form submission contains errors.");
return "formPage";
}
model.addAttribute("successMsg", "Form successfully submitted");
return "successPage";
}
Spring 的 BindingResult 自动将错误绑定(bind)到您的表单对象,因此在您的 jsp 中,您可以执行以下操作:
<form:form action="userRegistration" name="userRegistrationForm" commandName="userRegistration">
<form:input path="userName"/> <form:errors path="userName" cssClass="error"/>
<form:input path="houseNo"/> <form:errors path="houseNo" cssClass="error"/>
</form:form>
要使用 Spring 验证,您需要在类路径中添加 Validation-api(JSR-303 规范)和实现(Hibernate-Validator)。请参阅 Spring validation docs 的第 6.7 节
关于java - 使用 spring 3 注释发送成功或错误消息以查看,我们在Stack Overflow上找到一个类似的问题: https://stackoverflow.com/questions/10090262/