Question

在获取bindFromRequest（）。get（）形式的值时，它只返回null值。我得到的所有String类型都是null，并且整数为zer0。这是我的控制器和模型包的代码以及如何解决此错误：

enter code here

 In controller:

  public static Result getShow(){
  Register register=Form.form(Register.class).bindFromRequest().get();
  register.save();
  System.out.println(register);
  return ok("@Required annotation kicked in.."+register);
}
 In Models:

 package models;

 import javax.persistence.Entity;
 import javax.persistence.Id;
 import javax.persistence.Table;

  @Entity
  @Table(name="register")
  public class Register {
//private static final long serialVersionUID = 1L;

 private String firstname;

 private String lastname;
 @Id
 private String displayname;

 private String date;

 private String email; 

 private String password;

 private String confirm_password;

 private String gender;

 private int phone_no;

 private String address;

 private int zipcode;


    public String getFirstname() {
return firstname;

    }
   public void setFirstname(String firstname) {
    this.firstname = firstname;
   }

   public String getLastname() {
    return lastname;
   }

   public void setLastname(String lastname) {
    this.lastname = lastname;
   }
   public String getDisplayname() {
    return displayname;
   }
   public void setDisplayname(String displayname) {
    this.displayname = displayname;
   }
   public String getDate() {
    return date;
   }
   public void setDate(String date) {
    this.date = date;
   }
   public String getEmail() {
return email;
    }
   public void setEmail(String email) {
this.email = email;
     }
   public String getPassword() {
return password;
   }
   public void setPassword(String password) {
this.password = password;
   }
  public String getConfirm_password() {
return confirm_password;
   }
public void setConfirm_password(String confirm_password) {
    this.confirm_password = confirm_password;
}
public String getGender() {
    return gender;
}
public void setGender(String gender) {
    this.gender = gender;
}
public int getPhone_no() {
    return phone_no;
}
public void setPhone__no(int phone_no) {
    this.phone_no = phone_no;
}
public String getAddress() {
    return address;
}
public void setAddress(String address) {
    this.address = address;
}
public int getZipcode() {
    return zipcode;
}
public void setZipcode(int zipcode) {
    this.zipcode = zipcode;
}

}

Answer 1

如果bindFromRequest().get()返回null，则Form无法验证。要对此进行调试，请记录Form.form(Register.class).bindFromRequest().errors()，以查看Form中的验证错误。除此之外，如果没有看到Register类，以及您尝试绑定到它的数据，没有人可以告诉您错误。

你不应该盲目地呼叫get() Form并尝试保存它，因为这显然会失败。在尝试保存之前，至少检查它hasErrors()。如果确实存在验证错误，则应将Form传递回视图以向用户显示这些错误。

请参阅文档中的Handling Binding Failure。

在获取表单中的值时，它返回null值

1 个答案: