[JAVA]用Java实现的各种排序

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0 发表于: 2007-03-15

用Java语言实现的各种排序，包括插入排序、冒泡排序、选择排序、Shell排序、快速排序、归并排序、堆排序、SortUtil等。
插入排序：

package org.rut.util.algorithm.support;

import org.rut.util.algorithm.SortUtil;
/**
* @author treeroot
* @since 2006-2-2
* @version 1.0
*/
public class InsertSort implements SortUtil.Sort{

/* (non-Javadoc)
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[])
*/
public void sort(int[] data) {
int temp;
for(int i=1;i for(int j=i;(j>0)%26amp;%26amp;(data[j] SortUtil.swap(data,j,j-1);
}
}
}

}

冒泡排序：

package org.rut.util.algorithm.support;

import org.rut.util.algorithm.SortUtil;

/**
* @author treeroot
* @since 2006-2-2
* @version 1.0
*/
public class BubbleSort implements SortUtil.Sort{

/* (non-Javadoc)
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[])
*/
public void sort(int[] data) {
int temp;
for(int i=0;i for(int j=data.length-1;j>i;j--){
if(data[j] SortUtil.swap(data,j,j-1);
}
}
}
}

}

选择排序：

package org.rut.util.algorithm.support;

import org.rut.util.algorithm.SortUtil;

/**
* @author treeroot
* @since 2006-2-2
* @version 1.0
*/
public class SelectionSort implements SortUtil.Sort {

/*
* (non-Javadoc)
*
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[])
*/
public void sort(int[] data) {
int temp;
for (int i = 0; i < data.length; i++) {
int lowIndex = i;
for (int j = data.length - 1; j > i; j--) {
if (data[j] < data[lowIndex]) {
lowIndex = j;
}
}
SortUtil.swap(data,i,lowIndex);
}
}

}

Shell排序：

package org.rut.util.algorithm.support;

import org.rut.util.algorithm.SortUtil;

/**
* @author treeroot
* @since 2006-2-2
* @version 1.0
*/
public class ShellSort implements SortUtil.Sort{

/* (non-Javadoc)
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[])
*/
public void sort(int[] data) {
for(int i=data.length/2;i>2;i/=2){
for(int j=0;j insertSort(data,j,i);
}
}
insertSort(data,0,1);
}

/**
* @param data
* @param j
* @param i
*/
private void insertSort(int[] data, int start, int inc) {
int temp;
for(int i=start+inc;i for(int j=i;(j>=inc)%26amp;%26amp;(data[j] SortUtil.swap(data,j,j-inc);
}
}
}

}

快速排序：

package org.rut.util.algorithm.support;

import org.rut.util.algorithm.SortUtil;

/**
* @author treeroot
* @since 2006-2-2
* @version 1.0
*/
public class QuickSort implements SortUtil.Sort{

/* (non-Javadoc)
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[])
*/
public void sort(int[] data) {
quickSort(data,0,data.length-1);
}
private void quickSort(int[] data,int i,int j){
int pivotIndex=(i+j)/2;
file://swap
SortUtil.swap(data,pivotIndex,j);

int k=partition(data,i-1,j,data[j]);
SortUtil.swap(data,k,j);
if((k-i)>1) quickSort(data,i,k-1);
if((j-k)>1) quickSort(data,k+1,j);

}
/**
* @param data
* @param i
* @param j
* @return
*/
private int partition(int[] data, int l, int r,int pivot) {
do{
while(data[++l] while((r!=0)%26amp;%26amp;data[--r]>pivot);
SortUtil.swap(data,l,r);
}
while(l SortUtil.swap(data,l,r);
return l;
}

}

改进后的快速排序：

package org.rut.util.algorithm.support;

import org.rut.util.algorithm.SortUtil;

/**
* @author treeroot
* @since 2006-2-2
* @version 1.0
*/
public class ImprovedQuickSort implements SortUtil.Sort {

private static int MAX_STACK_SIZE=4096;
private static int THRESHOLD=10;
/* (non-Javadoc)
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[])
*/
public void sort(int[] data) {
int[] stack=new int[MAX_STACK_SIZE];

int top=-1;
int pivot;
int pivotIndex,l,r;

stack[++top]=0;
stack[++top]=data.length-1;

while(top>0){
int j=stack[top--];
int i=stack[top--];

pivotIndex=(i+j)/2;
pivot=data[pivotIndex];

SortUtil.swap(data,pivotIndex,j);

file://partition
l=i-1;
r=j;
do{
while(data[++l] while((r!=0)%26amp;%26amp;(data[--r]>pivot));
SortUtil.swap(data,l,r);
}
while(l SortUtil.swap(data,l,r);
SortUtil.swap(data,l,j);

if((l-i)>THRESHOLD){
stack[++top]=i;
stack[++top]=l-1;
}
if((j-l)>THRESHOLD){
stack[++top]=l+1;
stack[++top]=j;
}

}
file://new InsertSort().sort(data);
insertSort(data);
}
/**
* @param data
*/
private void insertSort(int[] data) {
int temp;
for(int i=1;i for(int j=i;(j>0)%26amp;%26amp;(data[j] SortUtil.swap(data,j,j-1);
}
}
}

}

归并排序：

package org.rut.util.algorithm.support;

import org.rut.util.algorithm.SortUtil;

/**
* @author treeroot
* @since 2006-2-2
* @version 1.0
*/
public class MergeSort implements SortUtil.Sort{

/* (non-Javadoc)
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[])
*/
public void sort(int[] data) {
int[] temp=new int[data.length];
mergeSort(data,temp,0,data.length-1);
}

private void mergeSort(int[] data,int[] temp,int l,int r){
int mid=(l+r)/2;
if(l==r) return ;
mergeSort(data,temp,l,mid);
mergeSort(data,temp,mid+1,r);
for(int i=l;i<=r;i++){
temp=data; P*LcWrK
} rvG qUmSUs
int i1=l; &B.r&K&
int i2=mid+1; Y.73I83-j
for(int cur=l;cur<=r;cur++){ s R~&S))
if(i1==mid+1) B8nXWi
data[cur]=temp[i2++]; IM#+@vv
else if(i2>r) H}@|ucM"\
data[cur]=temp[i1++]; u)V*o
else if(temp[i1] data[cur]=temp[i1++]; f*I5m=
else q+DH2&E'
data[cur]=temp[i2++]; a=J?[qrx
} _+. t7q^
} z=xHk|+'
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} 55I>v3 w
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改进后的归并排序: 646yeQ1
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package org.rut.util.algorithm.support; <hea%6
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import org.rut.util.algorithm.SortUtil; 0{,zE
V?"^Ff3m!
/** GWW@8GNI
* @author treeroot YOY+z\Q
* @since 2006-2-2 m^=, RfUUd
* @version 1.0 )_=&)a1U
*/ \w:u&6,0O
public class ImprovedMergeSort implements SortUtil.Sort { Ao\Vh\rQkq
d;=,/a
private static final int THRESHOLD = 10; sH]AB=_
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/* ? vlGr5#
* (non-Javadoc) K c<z;
* w0IB8GdF
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) `%Ghtm*
*/ 1^;h:,e6
public void sort(int[] data) { {aL$vgYT1
int[] temp=new int[data.length]; Lr^xp,_n
mergeSort(data,temp,0,data.length-1); \XN5))
} |x4yPYBL
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private void mergeSort(int[] data, int[] temp, int l, int r) { qh'BrYu*
int i, j, k; K4yYNlY
int mid = (l + r) / 2; 2%8Y-o?
if (l == r) =, 0a3D6b
return; {q)B@#p
if ((mid - l) >= THRESHOLD) Z:hrrq9
mergeSort(data, temp, l, mid); kziBHis!
else z|<oxF.
insertSort(data, l, mid - l + 1); 5:d2q<x:{
if ((r - mid) > THRESHOLD) VB\6SG
mergeSort(data, temp, mid + 1, r); M;Rw]M
else of`]LU:
insertSort(data, mid + 1, r - mid); >FHsZKJ
=QfKDA
for (i = l; i <= mid; i++) { |BkY"F7m9
temp = data; t4*A+"~j
} UT~2}B9fc
for (j = 1; j <= r - mid; j++) { 48Lmy<}*
temp[r - j + 1] = data[j + mid]; `.W;ptZ6
} D.o|($S0
int a = temp[l]; `Cf en8
int b = temp[r]; f5%&
for (i = l, j = r, k = l; k <= r; k++) { 55LF
if (a < b) { ug,|'<G+
data[k] = temp[i++]; I0vnd7
a = temp; %m) h1/l
} else { sri#L+I
data[k] = temp[j--]; h3EDN:FQ
b = temp[j]; _ICDtG^
} PL$F;d
} mtQ{6u
} dO;vcgvb
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/** +fQL~0tA
* @param data ]~Vu-@ /}
* @param l SWsv,
* @param i 8{fz0H.<?
*/ [0ffOTy
private void insertSort(int[] data, int start, int len) { &[Zap6]
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); U<Y'.!
} qetP93N_*
} !TL}~D:J
} by]|O
} bM0[V5:jB
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堆排序： ~!-8l&C
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package org.rut.util.algorithm.support; ,."(Gp
% rY8
import org.rut.util.algorithm.SortUtil; d3G{0PX
`6N-MsP
/** P"uHtHK
* @author treeroot o-=d|dWG
* @since 2006-2-2 4_762Gu%
* @version 1.0 I,<54?vS
*/ Gz|%;
public class HeapSort implements SortUtil.Sort{ Wj j2J8B
3).o"AN
/* (non-Javadoc) uWB:"&!^
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) LbX6p
*/ EPe]-C`
public void sort(int[] data) { wz*A<iU
MaxHeap h=new MaxHeap(); >6[ X }
h.init(data); *Qg5Z
for(int i=0;i h.remove(); }K/}(zuy1Y
System.arraycopy(h.queue,1,data,0,data.length); n;kciTD%wK
} 4-+ozC{
45)ogg2
private static class MaxHeap{ V4eng "
#x5N{8
void init(int[] data){ qHR^0&
this.queue=new int[data.length+1]; Oh/b?|imG
for(int i=0;i queue[++size]=data; g|._n
fixUp(size); EID)o[<
} Z;fm;X%4
} 0^&(u:~
Rnj Jg?I=
private int size=0; d{2y/
-eR!qy:.]5
private int[] queue; UbY~xs7_
,qe]fo >
public int get() { GSGyF
return queue[1]; &Mhv XHI
} {b|3]_-/
c?.r"5#
public void remove() { h0F0d^W.
SortUtil.swap(queue,1,size--); M<A;IOpR+
fixDown(1); 0q[p{_t`
} d2C[wQF
file://fixdown jr,&=C(
private void fixDown(int k) { j<ABO")v
int j; GUu\dl9WA'
while ((j = k << 1) <= size) { YPha9M$AgU
if (j < size %26amp;%26amp; queue[j] j++; )IFl 0<d
if (queue[k]>queue[j]) file://不用交换 -E8ntY-
break; ?iPZsV
SortUtil.swap(queue,j,k); | V.S.'
k = j; YN,y0t/cQ
} s[G|q5n
} S'Z70 zJ
private void fixUp(int k) { mL:m;>JJ n
while (k > 1) { DKy>]Hca
int j = k >> 1; ~\IF9!
if (queue[j]>queue[k]) $ \Q<K@{
break; /h}PEu3y
SortUtil.swap(queue,j,k); I.^X2
k = j; 35Ai;mU'
} je&dioZ>
} I~\O
/d0Q>v.g
} f >mhFy
,f8}q]FTA
} /S:w&5e
MU_!&(X_
SortUtil： S}oG.r 9
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package org.rut.util.algorithm; e[x?6He,$
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import org.rut.util.algorithm.support.BubbleSort; 0+T*$=?
import org.rut.util.algorithm.support.HeapSort; ZYE' C
import org.rut.util.algorithm.support.ImprovedMergeSort; \%sPNw=e
import org.rut.util.algorithm.support.ImprovedQuickSort; &Ki>h
import org.rut.util.algorithm.support.InsertSort; m b%C}8D
import org.rut.util.algorithm.support.MergeSort; xS=_yO9-
import org.rut.util.algorithm.support.QuickSort; 0JmFQ^g(
import org.rut.util.algorithm.support.SelectionSort; R%>jJ[4\[
import org.rut.util.algorithm.support.ShellSort; b8rp8'M)
8[8|*8xqs
/** oN *SRaAp
* @author treeroot kQ@gO[hS
* @since 2006-2-2 UZzNVIXA%
* @version 1.0 ]i-P-9PA4
*/ ^I]LoG:
public class SortUtil { P@qMJ}<j
public final static int INSERT = 1; 7~_{.f
public final static int BUBBLE = 2; Yo>`h2C4
public final static int SELECTION = 3; `wNm%*g
public final static int SHELL = 4; ).pO2lLF4
public final static int QUICK = 5; /8f>':zUb
public final static int IMPROVED_QUICK = 6; an3~'g?
public final static int MERGE = 7; h/,R{A2mO
public final static int IMPROVED_MERGE = 8; u@<Pu@?xm
public final static int HEAP = 9; :lUX5j3
nN>J*02(
public static void sort(int[] data) { %b=Y <v
sort(data, IMPROVED_QUICK); `_|aeoK_
} h,^BC^VU9-
private static String[] name={ u3U4UK
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" ?nQ_w0j
}; >BBl7
10mK}HT>4B
private static Sort[] impl=new Sort[]{ }7K@e;YUg
new InsertSort(), \ jECSV|
new BubbleSort(), ToV6lS"
new SelectionSort(), BbFa=H.
new ShellSort(), Hal7 MP
new QuickSort(), }K2 /&kZ
new ImprovedQuickSort(), !_qskDc-
new MergeSort(), w#oGX
new ImprovedMergeSort(), :*^:T_U
new HeapSort() Vzpt(_><
}; 59.$ULQVMY
X4a^mw\"
public static String toString(int algorithm){ M)L/d_4ka
return name[algorithm-1]; Kl{-zX
} zG_p"Z7,
_}D%iJg#
public static void sort(int[] data, int algorithm) { KE<kj$
impl[algorithm-1].sort(data); .Y;b)]@f
} l09Fn>wa
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public static interface Sort { m+?N7
public void sort(int[] data); 5L F/5`
} 2gt+l?O<PS
^EF'TO$
public static void swap(int[] data, int i, int j) { yf!,4SUkU
int temp = data; zJ;Rt9<7-
data = data[j]; UVrQV$g!
data[j] = temp; xq2V0Jp1u
} Pg`JQC|
} 9CB\n