身份證字號驗證的 Annotation 寫法

文章來源 : http://www.javaworld.com.tw/jute/post/view?bid=35&id=245715&sty=1&tpg=1&age=0

需要在WEB驗證身份證字號的話，可以試試看用下列的程式喔!
如果我也寫錯的地方也請不吝指教，謝謝。

PersonId.java

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import java.lang.annotation.Documented; import java.lang.annotation.ElementType; import java.lang.annotation.Retention; import java.lang.annotation.RetentionPolicy; import java.lang.annotation.Target;   import org.hibernate.validator.ValidatorClass;   /** * 身份證字號 * @author pogi * @BuildTime 2008/11/27 下午 1:51:08 */ @Documented //可以在 JavaDoc 顯示 @Target({ElementType.FIELD, ElementType.METHOD}) //可以用在類別的屬性或方法上 @Retention(RetentionPolicy.RUNTIME) //runtime 期間都會一直保留其值 @ValidatorClass(PersonIdValidator.class) //驗證時要呼叫的類別 public @interface PersonId{   String message() default "請輸入正確的身份證字號"; }

PersonIdValidator.java

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import java.io.Serializable; import java.util.Arrays; import java.util.regex.Matcher; import java.util.regex.Pattern;   import org.hibernate.validator.Validator;   /** * 中華民國身份證字號驗證 * @author pogi * @BuildTime 2008/11/27 下午 1:58:20 */ public class PersonIdValidator implements Validator<PersonId>, Serializable{   private static final long serialVersionUID = 1;   private Pattern pattern;   private static final char[] FIRSTWORD = {'A','B','C','D','E','F','G','H','I','J','K','L','M','N','O','P','Q','R','S','T','U','V','W','X','Y','Z'};   private static final int[] FIRSTWORDNUMBER = {1,10,19,28,37,46,55,64,39,73,82,2,11,20,48,29,38,47,56,65,74,83,21,3,12,30};     /* (non-Javadoc)    * @see org.hibernate.validator.Validator#isValid(java.lang.Object)    */   public boolean isValid(Object arg0){     if(arg0 == null) return true;     if(!(arg0 instanceof String)) return false;     String personId = ((String)arg0).toUpperCase();     if(personId.length() == 0) return true;     Matcher matcher = pattern.matcher(personId);     if(matcher.matches()){       int verifyNumber = 0;       //英文字母的轉碼數字       verifyNumber = FIRSTWORDNUMBER[Arrays.binarySearch(FIRSTWORD, personId.charAt(0))];       //身份證字號第1～8個數字依次取出乘以8～1       for(int i = 0; i < 8; i++){         verifyNumber += Character.digit(personId.charAt(i + 1), 10) * (8 - i);       }       //10 - 上述總和除10之餘數       verifyNumber = 10 - (verifyNumber % 10);       //若驗證碼與身份證字號最後一個數字相同即為正確       if(verifyNumber == Character.digit(personId.charAt(9), 10) || verifyNumber == 10){         return true;       }     }     return false;   }     public void initialize(PersonId arg0){     pattern = Pattern.compile("^\\p{Upper}{1}\\d{9}", Pattern.CASE_INSENSITIVE);   } }

上面兩個程式可以放在相同 package，這樣比較好管理

使用範例如下(JavaEE)
Person.java

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@Entity public class Person inplements Serializable{ private int id; private String personId;   @Id @GeneratedValue public int getId(){ return this.id; } public void setId(int id){ this.id = id; }   @NotNull @PersonId(message="你偷渡喔!!") public String getPersonId(){ return this.personId; } public void setPersonId(String personId){ this.personId = personId; } }