<script type="text/javascript"> var Book = function(newIsbn, newTitle, newAuthor) { // implements Publication // 私有属性 var isbn, title, author; // 私有方法 function checkIsbn(isbn) { if(isbn == undefined || typeof isbn != 'string') { return false; } return true; // All tests passed. } // 特权方法 this.getIsbn = function() { return isbn; }; this.setIsbn = function(newIsbn) { if(!checkIsbn(newIsbn)) throw new Error('Book: Invalid ISBN.'); isbn = newIsbn; }; this.getTitle = function() { return title; }; this.setTitle = function(newTitle) { title = newTitle || 'No title specified'; }; this.getAuthor = function() { return author; }; this.setAuthor = function(newAuthor) { author = newAuthor || 'No author specified'; }; // 构造代码 this.setIsbn(newIsbn); this.setTitle(newTitle); this.setAuthor(newAuthor); }; // Public, non-privileged methods. Book.prototype = { display: function() { alert("isbn:"+this.getIsbn()+" title:"+this.getTitle()+" author:"+this.getAuthor()); } }; //var theHobbit = new Book(123, '', 'J. R. R. Tolkein'); // 非字符串抛出异常 var theHobbit = new Book('1990-78sd-1092', '', 'J. R. R. Tolkein'); theHobbit.display(); // Outputs the data by creating and populating an HTML element. </script>
必须通过get方法来获取数据,因为数据是私有的。
js设计模式太牛逼了。
本文转自TBHacker博客园博客,原文链接:http://www.cnblogs.com/jiqing9006/p/5048948.html,如需转载请自行联系原作者