{"id":137,"date":"2007-11-08T12:14:02","date_gmt":"2007-11-08T11:14:02","guid":{"rendered":"http:\/\/blog.sahits.ch\/?p=137"},"modified":"2008-12-17T16:42:06","modified_gmt":"2008-12-17T15:42:06","slug":"uberprufen-esr-referenz-nummer","status":"publish","type":"post","link":"http:\/\/sahits.ch\/blog\/blog\/2007\/11\/08\/uberprufen-esr-referenz-nummer\/","title":{"rendered":"\u00dcberpr\u00fcfen ESR Referenz-Nummer"},"content":{"rendered":"

Mir wurde die Aufgabe gestellt, eine Pr\u00fcfroutine f\u00fcr die ESR-Referenz zu implementieren – in Java. Nach einem Fehlstart duch das Verwenden des falschen Algorithmus (Luhn Algorithmus zur Modulo 10 Pr\u00fcfung) habe ich den Richtigen gefunden. Jedoch nur f\u00fcr C\/C++, Visual Basic<\/a> und PHP<\/a>. Auf dieser Basis war es mir dann m\u00f6glich eine Adaption f\u00fcr Java zu bilden:
\nMethode zum \u00dcberpr\u00fcfen der ESR Referenz. Als Eingabestring (Nummer) wird s2test verwendet. Dieser String wird forg\u00e4ngig \u00fcberpr\u00fcft, ob er in einem akzeptierbaren Format vorliegt.
\nDie Letzte Ziffer der Referenz stellt die Pr\u00fcfziffer dar.
\nDas Array tabelle geht auf Pr\u00fcfziffern-Matrix (definiert von der Post) zur\u00fcck und stellt daraus die erste Zeile dar: <\/p>\n\n\n\n\n\n\n\n\n\n\n\n\n\n
\u00dcber<\/td>\nPr\u00fcfziffern<\/td>\nPr\u00fcf<\/td>\n<\/tr>\n
0<\/td>\n1<\/td>\n2<\/td>\n3<\/td>\n4<\/td>\n5<\/td>\n6<\/td>\n7<\/td>\n8<\/td>\n9<\/td>\n<\/tr>\n
0<\/td>\n0<\/td>\n9<\/td>\n4<\/td>\n6<\/td>\n8<\/td>\n2<\/td>\n7<\/td>\n1<\/td>\n3<\/td>\n5<\/td>\n0<\/td>\n<\/tr>\n
1<\/td>\n9<\/td>\n4<\/td>\n6<\/td>\n8<\/td>\n2<\/td>\n7<\/td>\n1<\/td>\n3<\/td>\n5<\/td>\n0<\/td>\n9<\/td>\n<\/tr>\n
2<\/td>\n4<\/td>\n6<\/td>\n8<\/td>\n2<\/td>\n7<\/td>\n1<\/td>\n3<\/td>\n5<\/td>\n0<\/td>\n9<\/td>\n8<\/td>\n<\/tr>\n
3<\/td>\n6<\/td>\n8<\/td>\n2<\/td>\n7<\/td>\n1<\/td>\n3<\/td>\n5<\/td>\n0<\/td>\n9<\/td>\n4<\/td>\n7<\/td>\n<\/tr>\n
4<\/td>\n8<\/td>\n2<\/td>\n7<\/td>\n1<\/td>\n3<\/td>\n5<\/td>\n0<\/td>\n9<\/td>\n4<\/td>\n6<\/td>\n6<\/td>\n<\/tr>\n
5<\/td>\n2<\/td>\n7<\/td>\n1<\/td>\n3<\/td>\n5<\/td>\n0<\/td>\n9<\/td>\n4<\/td>\n6<\/td>\n8<\/td>\n5<\/td>\n<\/tr>\n
6<\/td>\n7<\/td>\n1<\/td>\n3<\/td>\n5<\/td>\n0<\/td>\n9<\/td>\n4<\/td>\n6<\/td>\n8<\/td>\n2<\/td>\n4<\/td>\n<\/tr>\n
7<\/td>\n1<\/td>\n3<\/td>\n5<\/td>\n0<\/td>\n9<\/td>\n4<\/td>\n6<\/td>\n8<\/td>\n2<\/td>\n7<\/td>\n3<\/td>\n<\/tr>\n
8<\/td>\n3<\/td>\n5<\/td>\n0<\/td>\n9<\/td>\n4<\/td>\n6<\/td>\n8<\/td>\n2<\/td>\n7<\/td>\n1<\/td>\n2<\/td>\n<\/tr>\n
9<\/td>\n5<\/td>\n0<\/td>\n9<\/td>\n4<\/td>\n6<\/td>\n8<\/td>\n2<\/td>\n7<\/td>\n1<\/td>\n3<\/td>\n1<\/td>\n<\/tr>\n<\/table>\n

public boolean checkModulo10Rekursiv(String number){
\n int[] tabelle = {0,9,4,6,8,2,7,1,3,5};
\n int next=0;
\n for (int i=0;i<number.length()-1;i++){
\n char ch = number.charAt(i);
\n int n = Character.digit(ch, 10);
\n int index = (next+n)%10;
\n next = tabelle[index];
\n }
\n int result = (10-next)%10;
\n char ch = number.charAt(26);
\n int n = Character.digit(ch, 10);
\n return result==n;
\n}<\/code><\/p>\n","protected":false},"excerpt":{"rendered":"

Mir wurde die Aufgabe gestellt, eine Pr\u00fcfroutine f\u00fcr die ESR-Referenz zu implementieren – in Java. Nach einem Fehlstart duch das Verwenden des falschen Algorithmus (Luhn Algorithmus zur Modulo 10 Pr\u00fcfung) habe ich den Richtigen gefunden. Jedoch nur f\u00fcr C\/C++, Visual Basic und PHP. Auf dieser Basis war es mir dann m\u00f6glich eine Adaption f\u00fcr Java … \u201e\u00dcberpr\u00fcfen ESR Referenz-Nummer\u201c <\/span>weiterlesen<\/a><\/p>\n","protected":false},"author":2,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[7,6],"tags":[99,68,301,69],"class_list":["post-137","post","type-post","status-publish","format-standard","hentry","category-java","category-programmieren","tag-de","tag-esr","tag-java","tag-plausibilisierung"],"_links":{"self":[{"href":"http:\/\/sahits.ch\/blog\/wp-json\/wp\/v2\/posts\/137","targetHints":{"allow":["GET"]}}],"collection":[{"href":"http:\/\/sahits.ch\/blog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"http:\/\/sahits.ch\/blog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"http:\/\/sahits.ch\/blog\/wp-json\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"http:\/\/sahits.ch\/blog\/wp-json\/wp\/v2\/comments?post=137"}],"version-history":[{"count":2,"href":"http:\/\/sahits.ch\/blog\/wp-json\/wp\/v2\/posts\/137\/revisions"}],"predecessor-version":[{"id":305,"href":"http:\/\/sahits.ch\/blog\/wp-json\/wp\/v2\/posts\/137\/revisions\/305"}],"wp:attachment":[{"href":"http:\/\/sahits.ch\/blog\/wp-json\/wp\/v2\/media?parent=137"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"http:\/\/sahits.ch\/blog\/wp-json\/wp\/v2\/categories?post=137"},{"taxonomy":"post_tag","embeddable":true,"href":"http:\/\/sahits.ch\/blog\/wp-json\/wp\/v2\/tags?post=137"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}