[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; n%!50E6*:
} %1)JRc
int i1=l; T#HF!GH]
int i2=mid+1; Fzz9BEw(i
for(int cur=l;cur<=r;cur++){ ^MVOaV65
if(i1==mid+1) S`vw<u4t
data[cur]=temp[i2++]; z2q!_ ~
else if(i2>r) ?\zyeWK0L
data[cur]=temp[i1++]; AG"iS<u
else if(temp[i1] data[cur]=temp[i1++]; r>G||/Z
else }TDq7-(g
data[cur]=temp[i2++]; bnV)f<
} 2FGCf} ,
} tZ:fOM
1/SB[[g
} y8]vl;88yY
EW/NH&{
改进后的归并排序: m~F ~9&
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package org.rut.util.algorithm.support; >"Zn# FY
ozA%u,\7k
import org.rut.util.algorithm.SortUtil; !ED,'d%J
4+4&}8FH
/** ]Nue1xV_
* @author treeroot nyOvB#f
* @since 2006-2-2 UN:cRH{?*
* @version 1.0 zoj w^%W
*/ _V` QvnT}
public class ImprovedMergeSort implements SortUtil.Sort { T%**:@}+
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private static final int THRESHOLD = 10; x(rl|o
.L^F4
/* s+v$sF
* (non-Javadoc) Z-aB[hE
* pWKI^S
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) ,fj~BkW{
*/ Vb?_RE_H
public void sort(int[] data) { ppO!v?
int[] temp=new int[data.length]; ,|w,
mergeSort(data,temp,0,data.length-1); Wr,pm#gl6
} Qk&6Z%
t<cWMx5ra
private void mergeSort(int[] data, int[] temp, int l, int r) { j0S[JpoF
int i, j, k; 7QaZ|\c
int mid = (l + r) / 2; 1c`Yn:H^
if (l == r) Ua+Us"M3}
return; v&`n}lS
if ((mid - l) >= THRESHOLD) ^{-Z3Yxd
mergeSort(data, temp, l, mid); &p=(0$0&-
else +lJD7=%K]Z
insertSort(data, l, mid - l + 1); DMT2~mh
if ((r - mid) > THRESHOLD) 5gwEr170
mergeSort(data, temp, mid + 1, r); u<HJFGLzI
else [LSs|f
insertSort(data, mid + 1, r - mid); qtp-w\#S$
C(}Kfi@6N
for (i = l; i <= mid; i++) { n'@XgUI,
temp = data; Ky{C;7X
} ~P9^4
for (j = 1; j <= r - mid; j++) { x8&~
temp[r - j + 1] = data[j + mid]; C3; d.KlV
} R#/0}+-M
int a = temp[l]; Qa1G0qMEIF
int b = temp[r]; Vje LPbk)
for (i = l, j = r, k = l; k <= r; k++) { &lW~ot1,
if (a < b) { D*8oFJub
data[k] = temp[i++]; ;(LC{jY
a = temp; lV?OYS|4i
} else { "-G&]YMl
data[k] = temp[j--]; Tg v]30F)
b = temp[j]; wA6<BujD
} weIlWxy
} )lVplAhZD
} smX&B,&@
7] 17?s]t,
/** |l,0bkY@&
* @param data wE_#b\$=b
* @param l 9bD ER
* @param i |LE*R@|3$
*/ ^2mCF
private void insertSort(int[] data, int start, int len) { hle@= e/n
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); %UCuI9
} !r+SE
} 3L;&MG=
} *)i+c{~
} Yk5Cyq
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堆排序： ~Yl%{1
3yM!BTlX
package org.rut.util.algorithm.support; xx,|n
yzz(<s:o/
import org.rut.util.algorithm.SortUtil; Yn-;+ 4 K
lLuAgds`
/** AO0aOX8_+D
* @author treeroot .T7S1C $HP
* @since 2006-2-2 !,;/JxfgVh
* @version 1.0 FdmoR;
*/ (%|L23
public class HeapSort implements SortUtil.Sort{ B6]M\4v
YXTd^M~@D
/* (non-Javadoc) (k>I!Z/&2
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) mV'^4by
*/ #jX%nqMxW
public void sort(int[] data) { ~@EBW3>~5
MaxHeap h=new MaxHeap(); ?L6ACi`9
h.init(data); nV?e(}D
for(int i=0;i h.remove(); $4]"g}_
System.arraycopy(h.queue,1,data,0,data.length); W$?Bsz)
} l|~SVk|
W8s/"
private static class MaxHeap{ 2W=am_\0e.
o`ijdg!5qG
void init(int[] data){ g+92}$_
this.queue=new int[data.length+1]; J l9w/T
for(int i=0;i queue[++size]=data; )x&OdFX
fixUp(size); e=EM07z
} 9/R<,
} @1G`d53N
rJ_fg$.<
private int size=0; O=wu0n
[[9XqD]
private int[] queue; _.$g?E/(
,[0rh%%j
public int get() { 'Gds?o8
return queue[1]; s9}VnNr
} 1r;.r|
vaUUesytt
public void remove() { i2+vUl|;Z
SortUtil.swap(queue,1,size--); MnymV;y"
fixDown(1); yW)X asn
} 4GTB82V$
file://fixdown / qo`vk A
private void fixDown(int k) { S)[$F}
int j; \Z%V)ZRi=
while ((j = k << 1) <= size) { p(]o#$ 6[
if (j < size %26amp;%26amp; queue[j] j++; h2]gA_T`
if (queue[k]>queue[j]) file://不用交换 $+.!(Js"K
break; {QRrAi
SortUtil.swap(queue,j,k); l\{{iAC]I
k = j; KF4}cM=.5
} 6t(I.>-
} O*zF` 9
private void fixUp(int k) { *ioVLt,:R
while (k > 1) { F-2&P:sjQ
int j = k >> 1; z?i{2Fz6
if (queue[j]>queue[k]) m6=Jp<
break; ~)&im.Q4
SortUtil.swap(queue,j,k); K<Qy1y~[
k = j; C7lBK<gQ
} 4?)-;Hx_X
} ($ l t@j
QL4BD93v
} =-U8^e_Y
t*'U|K4L/
} ~)\E&c
k^Q>
SortUtil： EsR$H2"
~9KxvQzt
package org.rut.util.algorithm; j\S}TaH0e
+`)4jx)r/
import org.rut.util.algorithm.support.BubbleSort; [C"[#7
import org.rut.util.algorithm.support.HeapSort; (ug^2WG Yq
import org.rut.util.algorithm.support.ImprovedMergeSort; >X"V
import org.rut.util.algorithm.support.ImprovedQuickSort; U1wsCH3+n
import org.rut.util.algorithm.support.InsertSort; O~WT$
import org.rut.util.algorithm.support.MergeSort; #I(Ho:b
import org.rut.util.algorithm.support.QuickSort; O$Z<R:vVA
import org.rut.util.algorithm.support.SelectionSort; yxt`
import org.rut.util.algorithm.support.ShellSort; BCK0fk~
_PR><L_
/** OAhCW*B
* @author treeroot @a{1vT9b
* @since 2006-2-2 7sci&!.2`
* @version 1.0 hD5G\TR.
*/ ,ruL7|T&
public class SortUtil { C/{tvY /o
public final static int INSERT = 1; jml 4YaGZ
public final static int BUBBLE = 2; e+t2F |xDh
public final static int SELECTION = 3; g}\Yl.
public final static int SHELL = 4; e(NpX_8
public final static int QUICK = 5; xxN=,p
public final static int IMPROVED_QUICK = 6; 8=#J:LeXj
public final static int MERGE = 7; C/w!Y)nB=
public final static int IMPROVED_MERGE = 8; 7fg +WZ
public final static int HEAP = 9; FB-_a
wSMP^kG
public static void sort(int[] data) { c9 UJ=
sort(data, IMPROVED_QUICK); C)r!;u)AZH
} +Xg]@IS-eg
private static String[] name={ Gg3cY{7
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" ?1z." &
}; Y GZX}-
zMUifMiAj
private static Sort[] impl=new Sort[]{ JY|f zL
new InsertSort(), JDyP..Dt
new BubbleSort(), nzdJ*C
new SelectionSort(), 0pSqk/
new ShellSort(), )4hb%U
new QuickSort(), xt%-<%s%f
new ImprovedQuickSort(), 0t-!6
new MergeSort(), o0nKgq'w|x
new ImprovedMergeSort(), ?~;8Y=O
new HeapSort() >^8=_i !
}; yJ(p-3O5
i U^tv_1
public static String toString(int algorithm){ `@acQs;0
return name[algorithm-1]; _oB!-#
} ov{
ZR~ *Yofy
public static void sort(int[] data, int algorithm) { OIuEC7XM^C
impl[algorithm-1].sort(data); h|_E>6d)
} 0$-N
M>pcG.6V
public static interface Sort { Xgge_`T9
public void sort(int[] data); &uh|!lD
} Ix;9D'^}
>i>%@
public static void swap(int[] data, int i, int j) { !+;'kI2
int temp = data; H5f>Q0jq
data = data[j]; .e $W(}
data[j] = temp; 6gLk?^.
} v'"0Ya
} O<&8gk~