我正在尝试构建我的第一个 Spring mvc 应用程序并致力于 Spring Mvc 表单验证。我正在尝试检查空字段。但是当使用 @NotNull 注释验证“long”类型变量时，它会给出上述错误。
不知道怎么解决
这是我的学生 Bean
public class Student {
@NotNull
@Pattern(regexp="[A-Za-z]+")
private String name;
@Size(min=2, max=10)
private String father;
private String cnic;
@NotBlank
private String email;
@NotNull
private long phone;
public long getPhone() {
return phone;
}
public void setPhone(long phone) {
this.phone = phone;
}
public String getName() {
return name;
}
public void setName(String name) {
this.name = name;
}
public String getCnic() {
return cnic;
}
public void setCnic(String cnic) {
this.cnic = cnic;
}
public String getFather() {
return father;
}
public void setFather(String father) {
this.father = father;
}
public String getEmail() {
return email;
}
public void setEmail(String email) {
this.email = email;
}
}
还有我的 Studentmessage.properties 文件
Pattern.student1.name=The should not contain any Digits
Size.student1.father=please give the {0} between {2} and {1} characters
NotBlank.student1.email=please the email are requried
NotNull.student1.phone=sPlease provide integer data
Controller 类
@Controller
@RequestMapping(value="/student")
public class StudentController {
@RequestMapping(value="/Student",method=RequestMethod.GET)
public String std(Model m){
m.addAttribute("message", "Welcome To Registration ");
return "studentreg";
}
public ModelAndView insert(@Valid @ModelAttribute("student1") Student student1,BindingResult result) //ModelAttribute is used to directly connect the form data to the bean class
{
if(result.hasErrors()){
ModelAndView model=new ModelAndView("studentreg");
return model;
}
ModelAndView mo=new ModelAndView("success");
mo.addObject("message","user detail");
mo.addObject("stu", student1);
return mo;
}
}
Jsp文件是
<%@ page language="java" contentType="text/html; charset=ISO-8859-1"
pageEncoding="ISO-8859-1"%>
<%@taglib uri="http://www.springframework.org/tags/form" prefix="form" %>
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=ISO-8859-1">
<title>Insert title here</title>
</head>
<body>
<h2 align="center">${ message}</h2>
<form:errors path="student1.phone" style="color:red"/><br>
<form:form name="form" method="post" action="stu" >
<div align="center">
<table>
${ error}
<tr>
<td>Name :</td><td><input type="text" name="name" placeholder="EnterName"></td>
</tr>
<tr>
<td>Father Name</td>
<td><input type="text" name="father" placeholder="EnterFatherName"/></td>
</tr>
<tr>
<td>CNIC</td>
<td><input type="text" name="cnic" placeholder="Enter CNIC"/></td>
</tr>
<tr>
<td>Email</td>
<td><input type="text" name="email" placeholder="Enter Email"/></td>
</tr>
<tr>
<td>Phone:</td>
<td><input type="text" name="phone" placeholder="Enter Phone"/></td>
<form:errors path="phone"/>
</tr>
<tr>
<td><input type="submit" name="submite" value="Send"/></td>
</tr>
</table>
</table>
</table>
</div>
</table>
</form:form>
</body>
</html>
最佳答案
尝试使用 Long 而不是 long。
因为 long 永远不能为 null，所以它不是原始类型。
所以你应该使用 Long。
关于java - 无法将 java.lang.String 类型的属性值转换为属性 Phone 所需的 long 类型；嵌套的异常，我们在Stack Overflow上找到一个类似的问题： https://stackoverflow.com/questions/46321428/