[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; Y.]$T8
} X_hDU~5{wC
int i1=l; 3u$1W@T(
int i2=mid+1; CssE8p>"F
for(int cur=l;cur<=r;cur++){ J:glJ'4E
if(i1==mid+1) ,r;xH}tbi
data[cur]=temp[i2++]; 6{HCF-cQd
else if(i2>r) XDPgl=~
data[cur]=temp[i1++]; (H !iK,R
else if(temp[i1] data[cur]=temp[i1++]; bNVeL$'
else w,FPL&{
data[cur]=temp[i2++]; HdI)Z<Krp
} BB(6[V"SV
} )j>U4a
;VAyH('~
} 79W^;\3
2*V[kmD/3
改进后的归并排序: ~r5S{&
!h7.xl OpN
package org.rut.util.algorithm.support; 5HV+7zU5
+|,4g_(j
import org.rut.util.algorithm.SortUtil; XgHJ Oqt
-"dt3$ju
/** DI{*E
* @author treeroot ;s/<wx-C
* @since 2006-2-2 ucx02^uA
* @version 1.0 }}QR'
*/ 3>@VPMi
public class ImprovedMergeSort implements SortUtil.Sort { }\?9Prsd
-;L'Jb>s76
private static final int THRESHOLD = 10; , i5_4
?}4,s7PR
/* ebQgk Y=
* (non-Javadoc) kt978qfk
* W H/.h$
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 7<] EH:9
*/ ;x/eb g
public void sort(int[] data) { <4q H0<
int[] temp=new int[data.length]; V9BW@G@9
mergeSort(data,temp,0,data.length-1); <SI|)M,, 3
} V+O,y9
x~!|F5JbM
private void mergeSort(int[] data, int[] temp, int l, int r) { %ERcFI]G
int i, j, k; &btI#
int mid = (l + r) / 2; "U-jZ5o"
if (l == r) 5z!$=SFz
return; XH$r(@Z\7
if ((mid - l) >= THRESHOLD) YiDOV)
mergeSort(data, temp, l, mid); ,dCEy+
else bT^dtEr[
insertSort(data, l, mid - l + 1); WqCC4R,-
if ((r - mid) > THRESHOLD) QH9t |l
mergeSort(data, temp, mid + 1, r); l\*9rs:!
else @5S'5)4pB
insertSort(data, mid + 1, r - mid); |j`73@6
K%? g6j
for (i = l; i <= mid; i++) { jfY7ich
temp = data; 1^}I?PbqV
} ^U*y*l$
for (j = 1; j <= r - mid; j++) { *(?Wzanh
temp[r - j + 1] = data[j + mid]; 3uqhYT;
} wwB3m&
int a = temp[l]; Lz'VQO1U=
int b = temp[r]; *7jz(iX
for (i = l, j = r, k = l; k <= r; k++) { 0B]q /G(
if (a < b) { +y?Ilkk;j
data[k] = temp[i++]; Z,.Hz\y1D
a = temp; Yg^ &4ZF
} else { Y#ZgrziYM
data[k] = temp[j--]; [7FG;}lB-
b = temp[j]; \:WWrY8&
} w#|L8VAh
} i.vH$
} R}M ;, G
IT_I.5*A2
/** E5bVCAz
* @param data ]]O( IC
* @param l |h\7Q1,1~2
* @param i ^es]jng`
*/ W-=6:y#A
private void insertSort(int[] data, int start, int len) { tNi>TkC}`
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); g4[VgmhJ
} !wfW0?eu
} 9Ux(
} _{Kmj,q
} ,_Z(!| rW
_F;v3|`D@<
堆排序： 'BjTo*TB]Z
,twx4r^
package org.rut.util.algorithm.support; XVYFyza;
@Nek;xJ
import org.rut.util.algorithm.SortUtil; /*mF:40M;
hw^&{x
/** uw}Rr7q
* @author treeroot aixX/se
* @since 2006-2-2 *9aJZWf>V
* @version 1.0 $v|W2k
*/ o8bdL<
public class HeapSort implements SortUtil.Sort{ >X*tMhcb
7MKX`S
/* (non-Javadoc) hzqJ!
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) U#` e~d t<
*/ ?nd: :O
public void sort(int[] data) { hy5[ L`B
MaxHeap h=new MaxHeap(); 5I622d
h.init(data); s<9g3Gh
for(int i=0;i h.remove(); 6l]X{A.
System.arraycopy(h.queue,1,data,0,data.length); AI-*5[w#A
} 2*|T)OA`m,
k {*QU(
private static class MaxHeap{ +WH\,E
&]nx^C8V;
void init(int[] data){ %;,fI'M
this.queue=new int[data.length+1]; hJb2y`,q
for(int i=0;i queue[++size]=data; z%82Vt!a5
fixUp(size); 7zb^Z]
} b dgkA
} H@Z_P p?
;)(g$r^_i
private int size=0; .-KI,IU
$5R2QNg n
private int[] queue; cMw<3u\
6>a6;[
public int get() { *GT=U(d
return queue[1]; 8h=t%zMSb
} m\L`$=eO8
m@td[^O-
public void remove() { mlnF,+s
SortUtil.swap(queue,1,size--); UerbNz|
fixDown(1); fZGY'o&5
} qs5>`skX
file://fixdown s,HbW%s
private void fixDown(int k) { XcVN{6-z
int j; gq7tSkH@
while ((j = k << 1) <= size) { u,sR2&Fe
if (j < size %26amp;%26amp; queue[j] j++; cgg6E O(
if (queue[k]>queue[j]) file://不用交换 vrnvv?HPrR
break; _%w680b'
SortUtil.swap(queue,j,k); j9p6rD
k = j; i9;
} x[(6V'
} ?b (iWq
private void fixUp(int k) { KGz Nj%
while (k > 1) { uoS:-v}/Y~
int j = k >> 1; A~?M`L>B
if (queue[j]>queue[k]) ,i2-
break; i\i%WiRl
SortUtil.swap(queue,j,k); U\KMeaF5e-
k = j; M.W X&;>
} qX\*lm/l
} 3U[O :
U"PcNQy
} (2g a:}K
;8sL
} 8dGsV5"*
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SortUtil： ,>;21\D
GWA"!~Hu
package org.rut.util.algorithm; IDohv[#
*WwM"NFHDd
import org.rut.util.algorithm.support.BubbleSort; W0qR?jc
import org.rut.util.algorithm.support.HeapSort; rq+_[!
import org.rut.util.algorithm.support.ImprovedMergeSort; xe@1H\7:
import org.rut.util.algorithm.support.ImprovedQuickSort; 5'AP:3Gf"
import org.rut.util.algorithm.support.InsertSort; nBh+UT}
import org.rut.util.algorithm.support.MergeSort; 2Ez<Iw
import org.rut.util.algorithm.support.QuickSort; E9:@H;Gc
import org.rut.util.algorithm.support.SelectionSort; #[+# bw_6
import org.rut.util.algorithm.support.ShellSort; ]I?.1X5d0
uO%0rKW
/** 2|nm> 4
* @author treeroot :gVUk\)
* @since 2006-2-2 Vao:9~
* @version 1.0 "-~7lY%
*/ |5&+VI
public class SortUtil { kwI``7g8*e
public final static int INSERT = 1; F B]Y~;(
public final static int BUBBLE = 2; Y|>dS8f;4
public final static int SELECTION = 3; VoU8I ~
public final static int SHELL = 4; U0x A~5B
public final static int QUICK = 5; YvR bM
public final static int IMPROVED_QUICK = 6; r/YJ,2!
public final static int MERGE = 7; ij"~]I
public final static int IMPROVED_MERGE = 8; ]PXM;w
public final static int HEAP = 9; GEBSUvM7
UcRP/LR%C
public static void sort(int[] data) { ['d9sEv.
sort(data, IMPROVED_QUICK); {v?Q9
} 'p@f5[t
private static String[] name={ g`Z=Y7jLH
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" RRL{a6(?
}; @!8aZB3odt
TEtmmp0OD
private static Sort[] impl=new Sort[]{ 8q2a8I9g
new InsertSort(), ++cS^ Lo
new BubbleSort(), HW@wia
new SelectionSort(), eg0_ <
new ShellSort(), iq#{*:1
new QuickSort(), "+HJ/8Dd1
new ImprovedQuickSort(), 70'OS:J=\
new MergeSort(), B*,6;lCjX
new ImprovedMergeSort(), AO#9XDEM
new HeapSort() 19!?oeOU
}; PX:#+bq1
;Qi:j^+P)
public static String toString(int algorithm){ =pH2V^<<#
return name[algorithm-1]; DIC*{aBf
} a<cwrDZ
amBg<P`'_
public static void sort(int[] data, int algorithm) { !/FRL<mp
impl[algorithm-1].sort(data); l_I)d7
} Gm~([Ln{
ohx[_}xN
public static interface Sort { /*0t_
public void sort(int[] data); 7^L
} ).~ "
Kk3+ ]W<
public static void swap(int[] data, int i, int j) { XT7m3M
int temp = data; <c+.%ka
data = data[j]; 1`cH EAa
data[j] = temp; 9LR=>@Z
} C6!F6Stn]g
} 9`in r.: