ComboBox 的 Hibernate 验证器
Hibernate validator for ComboBox
如何验证用户的 jComboBox select 除默认项以外的任何项?
我需要检查用户是否没有 select 任何项目。所以 jComboBox 值将是 "Please select a scurity question"
在我的模型中 class,
@NotEmpty(message="Please fill the username field!")
public String getUsername() {
return this.username;
}
public void setUsername(String username) {
this.username = username;
}
@NotEmpty(message="Please fill the password field!")
public String getPassword() {
return this.password;
}
public void setPassword(String password) {
this.password = password;
}
public String getSeqQue() {
return this.seqQue;
}
public void setSeqQue(String seqQue) {
this.seqQue = seqQue;
}
添加到 getSeqQue() 中以验证我的 jComboBox 的休眠验证器注释是什么?
To validate your JComboBox with custom message simply you can make custom constraint validator.
参见以下示例:
MyModel.java
public class MyModel {
@ValidComboBox //this is the annotation which validates your combo box
private String question;
//getter and setter
}
ValidComboBox.java //注解
import java.lang.annotation.*;
import javax.validation.*;
@Target({ ElementType.METHOD, ElementType.FIELD, ElementType.ANNOTATION_TYPE })
@Retention(RetentionPolicy.RUNTIME)
@Constraint(validatedBy = ComboBoxValidator.class)
@Documented
public @interface ValidComboBox {
String value = "Please select a security question";
String message() default "Please select a security question.";
Class<?>[]groups() default {};
Class<? extends Payload>[]payload() default {};
}
ComboBoxValidator.java
import javax.validation.*;
public class ComboBoxValidator implements ConstraintValidator<ValidComboBox, String> {
private String value;
@Override
public void initialize(ValidComboBox arg0) {
this.value = arg0.value;
}
@Override
public boolean isValid(String question, ConstraintValidatorContext arg1) {
if(question.equalsIgnoreCase(value)){
return false;
}
return true;
}
}
像这样将项目添加到您的 jComboBox:
JComboBox<String> jComboBox = new JComboBox<>();
jComboBox.addItem("Please select a scurity question");
jComboBox.addItem("Question 1");
jComboBox.addItem("Question 2");
执行验证操作时需要添加以下行:
ValidatorFactory validatorFactory = Validation.buildDefaultValidatorFactory();
Validator validator = validatorFactory.getValidator();
String question = jComboBox.getSelectedItem().toString();
MyModel model = new MyModel();
model.setQuestion(model);
Set<ConstraintViolation<MyModel>> constraintViolations = validator.validate(model);
if (!constraintViolations.isEmpty()) {
String error = "";
for (ConstraintViolation<MyModel> constraintViolation : constraintViolations) {
error += constraintViolation.getMessage();
JOptionPane.showMessageDialog(null, error);
}
}
It will display Please select a security question message if you try to send request without choosing question.
如何验证用户的 jComboBox select 除默认项以外的任何项?
我需要检查用户是否没有 select 任何项目。所以 jComboBox 值将是 "Please select a scurity question"
在我的模型中 class,
@NotEmpty(message="Please fill the username field!")
public String getUsername() {
return this.username;
}
public void setUsername(String username) {
this.username = username;
}
@NotEmpty(message="Please fill the password field!")
public String getPassword() {
return this.password;
}
public void setPassword(String password) {
this.password = password;
}
public String getSeqQue() {
return this.seqQue;
}
public void setSeqQue(String seqQue) {
this.seqQue = seqQue;
}
添加到 getSeqQue() 中以验证我的 jComboBox 的休眠验证器注释是什么?
To validate your JComboBox with custom message simply you can make custom constraint validator.
参见以下示例:
MyModel.java
public class MyModel {
@ValidComboBox //this is the annotation which validates your combo box
private String question;
//getter and setter
}
ValidComboBox.java //注解
import java.lang.annotation.*;
import javax.validation.*;
@Target({ ElementType.METHOD, ElementType.FIELD, ElementType.ANNOTATION_TYPE })
@Retention(RetentionPolicy.RUNTIME)
@Constraint(validatedBy = ComboBoxValidator.class)
@Documented
public @interface ValidComboBox {
String value = "Please select a security question";
String message() default "Please select a security question.";
Class<?>[]groups() default {};
Class<? extends Payload>[]payload() default {};
}
ComboBoxValidator.java
import javax.validation.*;
public class ComboBoxValidator implements ConstraintValidator<ValidComboBox, String> {
private String value;
@Override
public void initialize(ValidComboBox arg0) {
this.value = arg0.value;
}
@Override
public boolean isValid(String question, ConstraintValidatorContext arg1) {
if(question.equalsIgnoreCase(value)){
return false;
}
return true;
}
}
像这样将项目添加到您的 jComboBox:
JComboBox<String> jComboBox = new JComboBox<>();
jComboBox.addItem("Please select a scurity question");
jComboBox.addItem("Question 1");
jComboBox.addItem("Question 2");
执行验证操作时需要添加以下行:
ValidatorFactory validatorFactory = Validation.buildDefaultValidatorFactory();
Validator validator = validatorFactory.getValidator();
String question = jComboBox.getSelectedItem().toString();
MyModel model = new MyModel();
model.setQuestion(model);
Set<ConstraintViolation<MyModel>> constraintViolations = validator.validate(model);
if (!constraintViolations.isEmpty()) {
String error = "";
for (ConstraintViolation<MyModel> constraintViolation : constraintViolations) {
error += constraintViolation.getMessage();
JOptionPane.showMessageDialog(null, error);
}
}
It will display Please select a security question message if you try to send request without choosing question.