[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; `(3/$%
} . Z%{'CC
int i1=l; 3K_A<j:
int i2=mid+1; PTEHP
for(int cur=l;cur<=r;cur++){ 7P9=)$(EH
if(i1==mid+1) 1Uqu>'
data[cur]=temp[i2++]; L@gWzC~?Q
else if(i2>r) LU9A#
data[cur]=temp[i1++]; 6qaulwV4t
else if(temp[i1] data[cur]=temp[i1++]; ndeebXw*
else W>O~-2
data[cur]=temp[i2++]; 39=1f6I1
} d$ ^ ,bL2p
} gmm|A9+tv
>Bgw}PI
} kSDZZx
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改进后的归并排序: =Jym%m
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package org.rut.util.algorithm.support; rs~wv('
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import org.rut.util.algorithm.SortUtil; Z"AQp _
rSJ9v:
/** ?|39u{
* @author treeroot M{*Lp6h
* @since 2006-2-2 |gU(s
* @version 1.0 p1|f<SF')
*/ o9H^?Rut
public class ImprovedMergeSort implements SortUtil.Sort { nG;8:f`
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private static final int THRESHOLD = 10; AU$Uxwz4
_~T!9
/* 'CN|'W)g7
* (non-Javadoc) *;fw%PW
* u5Ftu?t
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) EcCFbqS4W
*/ Et/&^&=\-
public void sort(int[] data) { !Uq^7Mw
int[] temp=new int[data.length]; @0SC"CqM
mergeSort(data,temp,0,data.length-1); TEaJG9RU>v
} uNHF'?X
?'<nx{!c
private void mergeSort(int[] data, int[] temp, int l, int r) { :at$HCaK
int i, j, k; Bn(W"=1
int mid = (l + r) / 2; H V;D?^F
if (l == r) `4~H/'%QB
return; l@ap]R
if ((mid - l) >= THRESHOLD) pb=cBZ$
mergeSort(data, temp, l, mid); ZAXN6h
else P`e!Z:
insertSort(data, l, mid - l + 1); -Q U^c2
if ((r - mid) > THRESHOLD) 4-[J@
mergeSort(data, temp, mid + 1, r); |\g5+fv9
else !ki.t
insertSort(data, mid + 1, r - mid); %C=]1Q=T)
?IGVErnJJC
for (i = l; i <= mid; i++) { }eRD|1
temp = data; (bh95X
} f`&dQ,;
for (j = 1; j <= r - mid; j++) { [ U wi
temp[r - j + 1] = data[j + mid]; R]i7 $}n
} x4/M}%h!;B
int a = temp[l]; 4X*>H
int b = temp[r]; U8G%YGMG.4
for (i = l, j = r, k = l; k <= r; k++) { txPIG/
if (a < b) { BouTcC
data[k] = temp[i++]; j7)Ao*WN
a = temp; b&5lYp"d
} else { UF@XK">
data[k] = temp[j--]; P'O#I}Dmw<
b = temp[j]; W[^qa5W<FB
} ^*fxR]Y
} lf!FTm7
} C(K; zo*S(
rQaxr!
/** W[}s o6
* @param data &CG*)bE
* @param l vVgg0Y2
* @param i R%c SJ8O#
*/ XB_B4X1R
private void insertSort(int[] data, int start, int len) { Jzp#bgq}|
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); Nq@+'<@p$
} ~O1&@xX
} &|`C)6[C
} kGN+rHo
} "&%#!2
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堆排序： !0dNQ[$82
A+UU~?3y
package org.rut.util.algorithm.support; Vo"RO$%ow*
^'ryNa;"
import org.rut.util.algorithm.SortUtil; zrU{@z$l
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/** wW%4d
* @author treeroot *tAg*$
* @since 2006-2-2 gc?#pP
* @version 1.0 3dDX8M?
*/ kn/Ao}J74z
public class HeapSort implements SortUtil.Sort{ ~wVd$%7`
9,^_<O@Q
/* (non-Javadoc) Y!T %cTK)a
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) }YHX-e<Yx]
*/ 25&J7\P*
public void sort(int[] data) { |eWjYGwJa
MaxHeap h=new MaxHeap(); mSo_} je(
h.init(data); SC- $B
for(int i=0;i h.remove(); UDL RCS8i
System.arraycopy(h.queue,1,data,0,data.length); fhCc! \
} KW7UUXL
cDI [PJ9
private static class MaxHeap{ c?%(DpE
LvEnXS
void init(int[] data){ ]]"jw{W}A
this.queue=new int[data.length+1]; Zx d~c]n
for(int i=0;i queue[++size]=data; Z?O*'#yn
fixUp(size); {b@KYR9K
} DSj(]U~r
} i>joT><B
z-c}NdW
private int size=0; N72Yq)(
L=8+_0
private int[] queue; }E7:ihy
Q3y;$"
public int get() { 3S&U!
return queue[1]; ymNnkFv
} 2"-S<zM
!L95^g
public void remove() { )nd\7|5#
SortUtil.swap(queue,1,size--); W'on$mB5<
fixDown(1); -D^}S"'
} 5IbJ
file://fixdown UQ.7>Ug+8s
private void fixDown(int k) { ZlojbL@|4
int j; EutP\K_Y
while ((j = k << 1) <= size) { \t|M-%&)4
if (j < size %26amp;%26amp; queue[j] j++; -!8(bjlJ&
if (queue[k]>queue[j]) file://不用交换 _A~4NW{U7
break; :(_+7N[KA
SortUtil.swap(queue,j,k); X@|&c]]
k = j; d O~O |Xsb
} 1lpwZ"
} -&e92g&n
private void fixUp(int k) { [JaS??ig
while (k > 1) { wlPx,UqZ
int j = k >> 1; @p|$/Z%R,
if (queue[j]>queue[k]) F]I=+T
break; $.:mai
SortUtil.swap(queue,j,k); $ F S_E
k = j; )=DGdIEt
} Z,X'-7YkU
} -`Y:~q1
w%zRHf8C
} O MX-_\")
nL?oTze*p
} H-p;6C<
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SortUtil： 1+7GUSIb
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package org.rut.util.algorithm; [>|FB'
>\!4Mk8
import org.rut.util.algorithm.support.BubbleSort; Bu]t*$
import org.rut.util.algorithm.support.HeapSort; LA[g(i 7
import org.rut.util.algorithm.support.ImprovedMergeSort; eVl'\aUd
import org.rut.util.algorithm.support.ImprovedQuickSort; J/6`oh?,Q
import org.rut.util.algorithm.support.InsertSort; |D.O6?v@
import org.rut.util.algorithm.support.MergeSort; ph2$oO 6,
import org.rut.util.algorithm.support.QuickSort; Oi} T2I
import org.rut.util.algorithm.support.SelectionSort; &Sp -w?kM
import org.rut.util.algorithm.support.ShellSort; ;;)`c/$
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/** ="d*E/##
* @author treeroot s[Ur~Wvn
* @since 2006-2-2 1J?dK|% b
* @version 1.0 "EV!>^Z
*/ dC<LDxlv
public class SortUtil { qSx(X!YS
public final static int INSERT = 1; dC1V-x10ju
public final static int BUBBLE = 2; Xq4|uuS-O
public final static int SELECTION = 3; T%Pp*1/m7
public final static int SHELL = 4; ]/cd;u
public final static int QUICK = 5; vOgC>_x7
public final static int IMPROVED_QUICK = 6; *x>3xQq&
public final static int MERGE = 7; j(#%tIv
public final static int IMPROVED_MERGE = 8; z* <y5
public final static int HEAP = 9; |p00j|k
X#w%>al
public static void sort(int[] data) { p#KW$OQ]8
sort(data, IMPROVED_QUICK); _P?\.W@
} x#C@8Bxq=
private static String[] name={ J`*iZvW#Bx
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" Q# ?wXX47
}; M=]5WZO~A
X_$a,"'~)
private static Sort[] impl=new Sort[]{ jw ,izxia
new InsertSort(), S.|FL%;
new BubbleSort(), nNmsr=y5
new SelectionSort(), =IKEb#R/
new ShellSort(), oK9'
new QuickSort(), Yct5V,X^
new ImprovedQuickSort(), st'D
new MergeSort(), gf)t)-E
new ImprovedMergeSort(), rx:z#"?I
new HeapSort() P;]F=m+*V
}; [hRU&z;W
xdy^^3"
public static String toString(int algorithm){ smQVWs>
return name[algorithm-1]; _;RVe"tR#
} {I{:GcS
$ex!!rqN|
public static void sort(int[] data, int algorithm) { {0YAzZ7
impl[algorithm-1].sort(data); N{d@^Yj
} Brd,Eg
Cz^Q5F`
public static interface Sort { fYrGpW(`
public void sort(int[] data); (ozb%a#B
} o5aLUWi-
c3 &m9zC
public static void swap(int[] data, int i, int j) { ;pRcVL_4
int temp = data; T{vR,
data = data[j]; iwY'4Z e
data[j] = temp; B ?%L
} cyd~2\Kv~
} !~-6wN"k