建造者模式

  • 建造者模式注重创建对象的细节，使用这种模式创建出的复杂对象或者复合对象结构会非常清晰
  • 举个例子：比如有一家招聘中介公司，现在有一批纸质简历或者简历数据信息，为了做成统一的电子版简历，我们需要将这些信息进行整理，我们该怎么去做
  1. var data = [
  2.     {
  3.         name: '张三',
  4.         age: 24,
  5.         work: 'engineer'
  6.     },
  7.     {
  8.         name: "李四",
  9.         age: 30,
  10.         work: 'teacher'
  11.     },
  12.     {
  13.         name: '王五',
  14.         age: 28,
  15.         work: 'xxx'
  16.     }
  17. ]
  18. //普通写法——不是建造者模式
  19. function Candidate(param){
  20.     var _candidate = {};
  21.     _candidate.name = param.name;
  22.     _candidate.age = param.age;
  24.     _candidate.firstName = _candidate.name.split("")[0];
  25.     _candidate.secondName = _candidate.name.substr(1);
  27.     _candidate.work = {};
  29.     switch(param.work) {
  30.         case 'engineer':
  31.             _candidate.work.name = '工程师';
  32.             _candidate.work.description = '容易秃头';
  33.             break;
  34.         case 'teacher':
  35.             _candidate.work.name = '老师';
  36.             _candidate.work.description = '乐于分享';
  37.             break;
  38.         default:
  39.             _candidate.work.name = param.work;
  40.             _candidate.work.description = '无';
  41.     }
  43.     _candidate.work.changeWork = function(work){
  44.         this.name = work;
  45.     }
  46.     _candidate.work.changeDes = function(des){
  47.         this.description = des;
  48.     }
  49.     return _candidate;
  50. }
  52. var candidateArr = [];
  54. for(var i = 0; i < data.length;i++) {
  55.     candidateArr[i] = Candidate(data[i]);
  56. }
  57. console.log(candidateArr);
  59. //使用建造者模式
  60. function Candidate(param){
  61.     var _candidate = new Person(param);
  63.     _candidate.name = new CreateName(param.name);
  64.     _candidate.work = new CreateWork(param.work);
  66.     return _candidate;
  67. }
  69. function Person(param){
  70.     this.name = param.name;
  71.     this.age = param.age;
  72. }
  74. function CreateName(name){
  75.     this.wholeName = name;
  76.     this.firstName = name.split("")[0];
  77.     this.secondName = name.substr(1);
  78. }
  80. function CreateWork(work){
  81.     switch(work) {
  82.         case 'engineer':
  83.             this.name = '工程师';
  84.             this.description = '容易秃头';
  85.             break;
  86.         case 'teacher':
  87.             this.name = '老师';
  88.             this.description = '乐于分享';
  89.             break;
  90.         default:
  91.             this.name = work;
  92.             this.description = '无';
  93.     }
  94. }
  95. CreateWork.prototype.changeWork = function(work){
  96.     this.name = work;
  97. }
  98. CreateWork.prototype.changeDes = function(des){
  99.     this.description = des;
  100. }
  102. var candidateArr = [];
  104. for(var i = 0; i < data.length;i++) {
  105.     candidateArr[i] = Candidate(data[i]);
  106. }
  107. console.log(candidateArr);