js排序 ：js冒泡排序的算法原理及代码实现

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冒泡排序可谓是最经典的排序算法了，它是基于比较的排序算法，其优点是实现简单，排序数量较小时性能较好。

算法原理

相邻的数据进行两两比较，小数放在前面，大数放在后面，如果前面的数据比后面的数据大，就交换这两个数的位置。也可以实现大数放在前面，小数放在后面，如果前面的数据比后面的小，就交换两个的位置。要实现上述规则需要用到两层for循环。

代码实现

• 冒泡实现数组从小到大排序

var arr=[2,7,1,8,6,4,3,5,9];
function mintomax(par){
  var length=par.length;
  for(var i=0; i<length-1; i++){
    for(var j=0; j<length-i-1; j++){
      if(par[j]>par[j+1]){
        var temp=par[j+1];
        par[j+1]=par[j];
        par[j]=temp;
      }
    }
  }
  return par;
}
console.log(mintomax(arr));

• 冒泡实现数组从大到小排序

var arr=[2,7,1,8,6,4,3,5,9];
function maxtomin(par){
      var length=par.length;
      for(var i=0; i<length-1; i++){
        for(var j=0; j<length-i-1; j++){
          if(par[j]<par[j+1]){
            var temp=par[j+1];
            par[j+1]=par[j];
            par[j]=temp;
          }
        }
      }
      return par;
    }
    console.log(maxtomin(arr));

• 用es6结构赋值的方式重写上面代码

var arr=[2,7,1,8,6,4,3,5,9];
function mintomax(par){
  var length=par.length;
  for(var i=0; i<length-1; i++){
    for(var j=0; j<length-i-1; j++){
      if(par[j]>par[j+1]){
        [par[j],par[j+1]]=[par[j+1],par[j]]
      }
    }
  }
  return par;
}
console.log(mintomax(arr));
function maxtomin(par){
  var length=par.length;
  for(var i=0; i<length-1; i++){
    for(var j=0; j<length-i-1; j++){
      if(par[j]<par[j+1]){
        [par[j],par[j+1]]=[par[j+1],par[j]]
      }
    }
  }
  return par;
}
console.log(maxtomin(arr));

• 按照父子平铺顺序排序

var data = [{
  ZDXM_STDCODE: '100101',
  ZDXM_STDNAME: '',
  FINA_YYSR: '',
  FINA_PGZHSY: '',
  FINA_SJZHSY: '',
  FINA_PGZHSYL: '',
  FINA_SJZHSYL: '',
  FINA_ZHSYLCE: '',
  FINA_SRJJL: '',
  FINA_JSSKL: '',
  FINA_HTE: '',
  GLZDXM: '1001',
},
{
  ZDXM_STDCODE: '1001',
  ZDXM_STDNAME: '',
  FINA_YYSR: '',
  FINA_PGZHSY: '',
  FINA_SJZHSY: '',
  FINA_PGZHSYL: '',
  FINA_SJZHSYL: '',
  FINA_ZHSYLCE: '',
  FINA_SRJJL: '',
  FINA_JSSKL: '',
  FINA_HTE: '',
  GLZDXM: '',
},
{
  ZDXM_STDCODE: '100102',
  ZDXM_STDNAME: '',
  FINA_YYSR: '',
  FINA_PGZHSY: '',
  FINA_SJZHSY: '',
  FINA_PGZHSYL: '',
  FINA_SJZHSYL: '',
  FINA_ZHSYLCE: '',
  FINA_SRJJL: '',
  FINA_JSSKL: '',
  FINA_HTE: '',
  GLZDXM: '1001',
},
{
  ZDXM_STDCODE: '100201',
  ZDXM_STDNAME: '',
  FINA_YYSR: '',
  FINA_PGZHSY: '',
  FINA_SJZHSY: '',
  FINA_PGZHSYL: '',
  FINA_SJZHSYL: '',
  FINA_ZHSYLCE: '',
  FINA_SRJJL: '',
  FINA_JSSKL: '',
  FINA_HTE: '',
  GLZDXM: '1002',
},
{
  ZDXM_STDCODE: '1002',
  ZDXM_STDNAME: '',
  FINA_YYSR: '',
  FINA_PGZHSY: '',
  FINA_SJZHSY: '',
  FINA_PGZHSYL: '',
  FINA_SJZHSYL: '',
  FINA_ZHSYLCE: '',
  FINA_SRJJL: '',
  FINA_JSSKL: '',
  FINA_HTE: '',
  GLZDXM: '',
},
{
  ZDXM_STDCODE: '100202',
  ZDXM_STDNAME: '',
  FINA_YYSR: '',
  FINA_PGZHSY: '',
  FINA_SJZHSY: '',
  FINA_PGZHSYL: '',
  FINA_SJZHSYL: '',
  FINA_ZHSYLCE: '',
  FINA_SRJJL: '',
  FINA_JSSKL: '',
  FINA_HTE: '',
  GLZDXM: '1002',
},
]
function datatotree(par) {
  var length = par.length;
  for (var i = 0; i < length-1; i++) {
    for (var j = 0; j < length - i - 1; j++) {
      var str1=par[j].GLZDXM+par[j].ZDXM_STDCODE;
      var str2=par[j+1].GLZDXM+par[j+1].ZDXM_STDCODE;
      if(par[j].GLZDXM==null){
        str1=par[j].ZDXM_STDCODE;
      }
      if(data[j+1].GLZDXM==null){
        str2=par[j+1].ZDXM_STDCODE;
      }
      if (str1 > str2) {
        var temp = par[j + 1];
        par[j + 1] = par[j]
        par[j] = temp;
      }
    }
  }
  return par;
}
var data = datatotree(data)
console.log(data);

• 按照es6结构赋值重写上面代码

var data = [{
  ZDXM_STDCODE: '100101',
  ZDXM_STDNAME: '',
  FINA_YYSR: '',
  FINA_PGZHSY: '',
  FINA_SJZHSY: '',
  FINA_PGZHSYL: '',
  FINA_SJZHSYL: '',
  FINA_ZHSYLCE: '',
  FINA_SRJJL: '',
  FINA_JSSKL: '',
  FINA_HTE: '',
  GLZDXM: '1001',
},
{
  ZDXM_STDCODE: '1001',
  ZDXM_STDNAME: '',
  FINA_YYSR: '',
  FINA_PGZHSY: '',
  FINA_SJZHSY: '',
  FINA_PGZHSYL: '',
  FINA_SJZHSYL: '',
  FINA_ZHSYLCE: '',
  FINA_SRJJL: '',
  FINA_JSSKL: '',
  FINA_HTE: '',
  GLZDXM: '',
},
{
  ZDXM_STDCODE: '100102',
  ZDXM_STDNAME: '',
  FINA_YYSR: '',
  FINA_PGZHSY: '',
  FINA_SJZHSY: '',
  FINA_PGZHSYL: '',
  FINA_SJZHSYL: '',
  FINA_ZHSYLCE: '',
  FINA_SRJJL: '',
  FINA_JSSKL: '',
  FINA_HTE: '',
  GLZDXM: '1001',
},
{
  ZDXM_STDCODE: '100201',
  ZDXM_STDNAME: '',
  FINA_YYSR: '',
  FINA_PGZHSY: '',
  FINA_SJZHSY: '',
  FINA_PGZHSYL: '',
  FINA_SJZHSYL: '',
  FINA_ZHSYLCE: '',
  FINA_SRJJL: '',
  FINA_JSSKL: '',
  FINA_HTE: '',
  GLZDXM: '1002',
},
{
  ZDXM_STDCODE: '1002',
  ZDXM_STDNAME: '',
  FINA_YYSR: '',
  FINA_PGZHSY: '',
  FINA_SJZHSY: '',
  FINA_PGZHSYL: '',
  FINA_SJZHSYL: '',
  FINA_ZHSYLCE: '',
  FINA_SRJJL: '',
  FINA_JSSKL: '',
  FINA_HTE: '',
  GLZDXM: '',
},
{
  ZDXM_STDCODE: '100202',
  ZDXM_STDNAME: '',
  FINA_YYSR: '',
  FINA_PGZHSY: '',
  FINA_SJZHSY: '',
  FINA_PGZHSYL: '',
  FINA_SJZHSYL: '',
  FINA_ZHSYLCE: '',
  FINA_SRJJL: '',
  FINA_JSSKL: '',
  FINA_HTE: '',
  GLZDXM: '1002',
},
]
function datatotree(par) {
  var length = par.length;
  for (var i = 0; i < length-1; i++) {
    for (var j = 0; j < length - i - 1; j++) {
      var str1=par[j].GLZDXM+par[j].ZDXM_STDCODE;
      var str2=par[j+1].GLZDXM+par[j+1].ZDXM_STDCODE;
      if(par[j].GLZDXM==null){
        str1=par[j].ZDXM_STDCODE;
      }
      if(data[j+1].GLZDXM==null){
        str2=par[j+1].ZDXM_STDCODE;
      }
      if (str1 > str2) {
        [par[j],par[j+1]]=[par[j+1],par[j]];
      }
    }
  }
  return par;
}
var data = datatotree(data)
console.log(data);

• 上面代码排序之后结果

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