我要评论场景
我在开发修改密码功能，通过原密码和新密码及确认新密码，希望通过constraintvalidator这个方式来校验新密码和确认新密码，规则是这两个密码需要是相同的。
参考文档
- https://github.com/micronaut-projects/micronaut-core/issues/3243
- https://stackoverflow.com/questions/37750656/how-to-access-a-field-which-is-described-in-annotation-property
- https://discourse.hibernate.org/t/how-can-i-retrieve-current-validation-contexts-groups-in-a-validator/414/4
实现
定义matches注解
@constraint(validatedby = samecontentmatchesvalidator.class)
@target({ elementtype.field })
@retention(retentionpolicy.runtime)
public @interface samecontentmatches {
string message() default "内容不一致";
class<?>[] groups() default {};
class<? extends payload>[] payload() default {};
string field(); // 新增属性，指定要比较的字段
}定义dto对象
@data
public class usermodifypassworddto implements userdto {
@notnull
private string username;
@notnull
private string password;
private string newpassword;
@samecontentmatches(field = "newpassword")
private string confirmpassword;
}定义matchesvalidator对象，实现验证的代码逻辑
public class samecontentmatchesvalidator implements constraintvalidator<samecontentmatches, string> {
private string field;
@override
public void initialize(samecontentmatches constraintannotation) {
this.field = constraintannotation.field();
}
@override
public boolean isvalid(string object, final constraintvalidatorcontext context) {
return true;
}
}遇到的问题
- 在matchesvalidator类中，无法获取到当前对象，除非把samecontentmatches注解作用到当前类上面，而非字段上面。
- 这个问题应该主是无法解决的，因为你拦截的是字段，在这个constraintvalidatorcontext处理的都是和当前字段有关的信息
应用到类上，代码调整，问题解决
@constraint(validatedby = samecontentmatchesvalidator.class)
@target({ elementtype.type })
@retention(retentionpolicy.runtime)
public @interface samecontentmatches {
string message() default "内容不一致";
class<?>[] groups() default {};
class<? extends payload>[] payload() default {};
/**
* 源字段名
* @return
*/
string sourcefield();
/**
* 目标字段名
* @return
*/
string destinationfield();
}
public class samecontentmatchesvalidator implements constraintvalidator<samecontentmatches, object> {
private string sourcefield;
private string destinationfield;
@override
public void initialize(samecontentmatches constraintannotation) {
this.sourcefield = constraintannotation.sourcefield();
this.destinationfield = constraintannotation.destinationfield();
}
@override
public boolean isvalid(object o, final constraintvalidatorcontext context) {
final object sourcefieldval = beanutil.getproperty(o, this.sourcefield);
final object destinationfieldval = beanutil.getproperty(o, this.destinationfield);
return sourcefieldval.equals(destinationfieldval);
}
}
@data
@samecontentmatches(sourcefield = "confirmpassword", destinationfield = "newpassword")
public class usermodifypassworddto implements userdto {
@notnull
private string username;
@notnull
private string password;
private string newpassword;
private string confirmpassword;
}上面的代码samecontentmatches注解出现了弱编码，这块需要再进行优化。
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