[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; (vf5qF^
} \\~4$Ai[
int i1=l; t]%!vXo
int i2=mid+1; kOuQR$9s
for(int cur=l;cur<=r;cur++){ ^l/$ 13=
if(i1==mid+1) }u7&SU
data[cur]=temp[i2++]; q&wXs/$a
else if(i2>r) \it<]BN
data[cur]=temp[i1++]; ,o j\=2
else if(temp[i1] data[cur]=temp[i1++]; u~d&<_Z
else DK;/eZe
data[cur]=temp[i2++]; 0CO6-&F9n
} TS<uBX
} IyA8+N y
9Fh(tzz
} @'!61'}f
S$I:rbc
改进后的归并排序: ETVT.R8
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package org.rut.util.algorithm.support; Jid:$T>
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import org.rut.util.algorithm.SortUtil; $pGk%8l%
wen6"
/** {n%U2LVL
* @author treeroot $yb8..+
* @since 2006-2-2 Q-N.23\1
* @version 1.0 JZ=a3)x"
*/ H{T)?J~
public class ImprovedMergeSort implements SortUtil.Sort { dfq5P!'
YR`Mi.,Sfm
private static final int THRESHOLD = 10; \ o&i63u
1P\_3.V{
/* Z;mDMvIu (
* (non-Javadoc) [0e]zyB+
* ]H|1quT
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) .*g;2.-qv&
*/ |Y1<P^
public void sort(int[] data) { ;3_Q7;y
int[] temp=new int[data.length]; <!|2Ru
mergeSort(data,temp,0,data.length-1); GS3ydN<v
} 2WOdTM{u
SwuadN
private void mergeSort(int[] data, int[] temp, int l, int r) { *lG$B@;rc|
int i, j, k; Cst>'g-yB
int mid = (l + r) / 2; ':w6{b
if (l == r) 2h6F j&
return; hTn }AsfLY
if ((mid - l) >= THRESHOLD) Z{n7z$s*
mergeSort(data, temp, l, mid); /bylA`IMW
else `"CF/X^
insertSort(data, l, mid - l + 1); uS|Zkuk[!
if ((r - mid) > THRESHOLD) u;:N 4d=f'
mergeSort(data, temp, mid + 1, r); \9/n~/{
else yK&)H+v
insertSort(data, mid + 1, r - mid); q+o(`N'~G
_H8)O2mJ
for (i = l; i <= mid; i++) { +o/;bm*U<K
temp = data; O'-lBf+<
} 1|cmmUM-'v
for (j = 1; j <= r - mid; j++) { u-k?ef
temp[r - j + 1] = data[j + mid]; CsR~qQ 5
} uYMW5k_,>
int a = temp[l]; {hRAR8
int b = temp[r]; Qg _?..%
for (i = l, j = r, k = l; k <= r; k++) { 1^Zx-p3J
if (a < b) { <$njU=YE&
data[k] = temp[i++]; ^?xXP=/
a = temp; ;|/7o@$n
} else { 3G8uXB_`}
data[k] = temp[j--]; 6]gs{zG
b = temp[j]; `u-VGd\
} J= |[G'
} Vq'&t<K#
} m9xu$z|e
}}(~'
/** \^-3)*r
* @param data XLbrE|0A?
* @param l bt&vik _
* @param i Hab9~v ]
*/ );|~4#
private void insertSort(int[] data, int start, int len) { [bT@Y:X@`
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); <qRw! 'S^
} `g :<$3}
} u%[*;@;9+
} jv|IV
} kxUGd)S
rjR
堆排序： {Ue6DK%
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package org.rut.util.algorithm.support; kb7\qH!n
KuI>:i;
import org.rut.util.algorithm.SortUtil; >PGm}s_
|_=jXf\TL
/** zPkg3H
* @author treeroot !s)$_tG
* @since 2006-2-2 Z*ZG5e
* @version 1.0 n`:l`n>N$
*/ \AK|~:\]
public class HeapSort implements SortUtil.Sort{ "?9fL#8f*!
&&<^wtznO
/* (non-Javadoc) !J6s^um
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) CWN=6(y
*/ =k/n
public void sort(int[] data) { Xs`:XATb/
MaxHeap h=new MaxHeap(); ev guw*u
h.init(data); 4rzioIk
for(int i=0;i h.remove(); 462ae` 6l
System.arraycopy(h.queue,1,data,0,data.length); *r%mqAx(
} <s7{6n')
g<dCUIbcQ
private static class MaxHeap{ ~!nd'{{9
#U_u~7?H$
void init(int[] data){ z~Pmh%b
this.queue=new int[data.length+1]; ``E;!r="v
for(int i=0;i queue[++size]=data; fVN}7PH7+
fixUp(size); <NAR'{f
} BA>0 +
} Q)}\4&4
n[WeN NU
private int size=0; 0F~9t!
:<v$vER,&
private int[] queue; q9!#S
D!sSe|sL^
public int get() { 8|tm`r`*Az
return queue[1]; JWn{nJ$]
} QJE-$ :
N^ET qg
public void remove() { '_&(Iwu
SortUtil.swap(queue,1,size--); SmLYxH3F
fixDown(1); y-X'eCUz
} uHIWbF<0oo
file://fixdown s+w<!`-
private void fixDown(int k) { Y'HF^jv]R
int j; N*MR6~z4
while ((j = k << 1) <= size) { 7cy~qg
if (j < size %26amp;%26amp; queue[j] j++; xXYens}
if (queue[k]>queue[j]) file://不用交换 B*AMo5
break; V$_0VN'+Z
SortUtil.swap(queue,j,k); @ixX?N)V
k = j; #<e7 Y0
} Rj&7|z
} Gehl/i-
private void fixUp(int k) { @/u`7FO$&
while (k > 1) { +UsR
int j = k >> 1; ,TtDCcjd%f
if (queue[j]>queue[k]) w+Z};C
break; :y %~9=
SortUtil.swap(queue,j,k); ^MW%&&,BL
k = j; )/AvWDKvO
} Iq=B]oE
} 8WGM%n#q
:V2Q n-N
} prs<ZxbQb
Xda<TX@-
} iHn]yv3 #
T> 'Vaxo
SortUtil： Iz8^?>X
!U!E_D.O
package org.rut.util.algorithm; 2"'8x?.V
Cr%r<*s
import org.rut.util.algorithm.support.BubbleSort; _Xv/S_yW
import org.rut.util.algorithm.support.HeapSort; i+Dgw
import org.rut.util.algorithm.support.ImprovedMergeSort; csM|VNE>
import org.rut.util.algorithm.support.ImprovedQuickSort; S}f<@-16P
import org.rut.util.algorithm.support.InsertSort; )89jP088V
import org.rut.util.algorithm.support.MergeSort; 11T\2&Q
import org.rut.util.algorithm.support.QuickSort; A(p
import org.rut.util.algorithm.support.SelectionSort; .Topg.7W
import org.rut.util.algorithm.support.ShellSort; mwCnP8:K
!dH&IEP~
/** ~ 7Nyi dV;
* @author treeroot v`w?QIB]
* @since 2006-2-2 L _y|l5
* @version 1.0 NETC{:j
*/ c):*R ]=
public class SortUtil { nQHd\/B
public final static int INSERT = 1; a0.3$
public final static int BUBBLE = 2; $?-o
public final static int SELECTION = 3; Kx+Bc&X
public final static int SHELL = 4; LD~'^+W
public final static int QUICK = 5; }gi'%e
public final static int IMPROVED_QUICK = 6; 5; [|k$ v
public final static int MERGE = 7; z{0;%E
public final static int IMPROVED_MERGE = 8; l,L=VDEz,
public final static int HEAP = 9; sr+mY;
an`(?6d
public static void sort(int[] data) { ncr-i!Jjk
sort(data, IMPROVED_QUICK); P/9J!.Cm
} L,pSdeq
private static String[] name={ <'_GQM`G
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" F\rSYjMyk
}; 7YjucPH#
f4T0Y["QA
private static Sort[] impl=new Sort[]{ %pkq ?9
new InsertSort(), %d J>8.jW@
new BubbleSort(), R<-C>D
new SelectionSort(), 15 11<,
new ShellSort(), "BfmX0&?
new QuickSort(), }2A1Yt:^P
new ImprovedQuickSort(), ==Mi1Q#5C
new MergeSort(), &:#8ol(n5b
new ImprovedMergeSort(), E}vO*ZZEw
new HeapSort() N>Y50
}; Z;'.pU~
/j/%wT2m
public static String toString(int algorithm){ 08?MS_
return name[algorithm-1]; SvP\JQ<c
} k1U8wdoT
$2CGRhC
public static void sort(int[] data, int algorithm) { 0_mvz%[J
impl[algorithm-1].sort(data); xt,L* B
} ~*c=
%*q0+_
public static interface Sort { 0P40K
public void sort(int[] data); ]"g >>N
} QU!'W&F6
I*S`I|{J
public static void swap(int[] data, int i, int j) { 3ZlGbP#3w
int temp = data; L{A-0Ffh
data = data[j]; ]</4#?_
data[j] = temp; +()t8,S,
} @H%=%ZwpO
} WTYFtZD[yH