java后端对象属性验证，Hibernate-Validation
Hibernate-Validation
一．依赖架包：
validation-api-1.0.0.GA.jar
hibernate-validator-4.3.1.final-1.0.0.jar
二．校验工具类
public class ValidationUtils {
privatestatic Validator validator = Validation.buildDefaultValidatorFactory().getValidator();
publicstatic
ValidationResultresult = new ValidationResult();
Set
if(CollectionUtils.isNotEmpty(set)){
result.setHasErrors(true);
Map
for(ConstraintViolation
errorMsg.put(cv.getPropertyPath().toString(),cv.getMessage());
}
result.setErrorMsg(errorMsg);
}
returnresult;
}
publicstatic
ValidationResultresult = new ValidationResult();
Set
if(CollectionUtils.isNotEmpty(set)){
result.setHasErrors(true);
Map
for(ConstraintViolation
errorMsg.put(propertyName,cv.getMessage());
}
result.setErrorMsg(errorMsg);
}
returnresult;
}
}
三、校验返回对象
public class ValidationResult{
//校验结果是否有错
private boolean hasErrors;
//校验错误信息
private Map
public boolean getHasErrors(){
return hasErrors;
}
public void setHasErrors(boolean hasErrors){
this.hasErrors = hasErrors;
}
public Map
return errorMsg;
}
public void setErrorMsg(Map
this.errorMsg = errorMsg;
}
@Override
public String toString(){
return "ValidationResult[hasErrors=" + hasErrors + ", errorMsg=" + errorMsg + "]";
}
}
四．实体类
public class SimpleEntity {
@NotBlank(message="名字不能为空或者空串")
@Length(min=2, max=10, message="名字必须由2~10个字组成")
private String name;
@Past(message="时间不能晚于当前时间")
private Date date;
@Email(message="邮箱格式不正确")
private String email;
@Pattern(regexp="(?![0-9]+$)(?![a-zA-Z]+$)[0-9A-Za-z]{5,10}",message="密码必须是5~10位数字和字母的组合")
private String password;
@AssertTrue(message="字段必须为真")
private boolean valid;
//get set方法省略，自己添加
}
五．校验
public void validateSimpleEntity() {
SimpleEntity se = new SimpleEntity();
se.setDate(new Date());
se.setEmail("123");
se.setName("123");
se.setPassword("123");
se.setValid(false);
ValidationResult result = ValidationUtils.validateEntity(se);
System.out.println("--------------------------");
System.out.println(result);
Assert.assertTrue(result.isHasErrors());
}
返回结果：
ValidationResult [hasErrors=true, errorMsg={name=名字不能为空或者空串}]
ValidationResult [hasErrors=false, errorMsg=null]
六．自定义注解
若hibernate提供注解不够使用可自定义
@Target( { METHOD, FIELD, ANNOTATION_TYPE })
@Retention(RUNTIME)
@Constraint(validatedBy = PasswordValidator.class)
@Documented
public @interface Password {
String message() default"{密码必须是5~10位数字和字母组合}";
Class[] groups() default {};
Class[] payload() default {};
}
七、密码校验类
/**
* 自定义密码校验类
*/
public class PasswordValidator implements ConstraintValidator{
//5~10位的数字与字母组合
privatestatic Pattern pattern = Pattern.compile("(?![0-9]+$)(?![a-zA-Z]+$)[0-9A-Za-z]{5,10}");
public void initialize(Password constraintAnnotation){
//do nothing
}
public boolean isValid(String value, ConstraintValidatorContext context){
if( value==null ){
returnfalse;
}
Matcher m = pattern.matcher(value);
return m.matches();
}
}