[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; /mwr1GU
} un^IQMIh
int i1=l; _O;~ }N4u
int i2=mid+1; !;*2*WuO;
for(int cur=l;cur<=r;cur++){ ,*Z[P%<9
if(i1==mid+1) WJU NJN
data[cur]=temp[i2++]; *6D%mrK
else if(i2>r) !;aC9VhSU
data[cur]=temp[i1++]; ]2Fo.n
else if(temp[i1] data[cur]=temp[i1++]; FFeRE{,
else "$IwQ
data[cur]=temp[i2++]; j'*p
} x\hn;i<
} EjX'&"3.
!en F8a
} #KNq:@wp6
<Ihed|
改进后的归并排序: mjl!Nth:<
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package org.rut.util.algorithm.support; m=iov2K>
P>T*:!s;
import org.rut.util.algorithm.SortUtil; h!N&gZ[0
y]YS2^
/** wt.{Fqm
* @author treeroot Mr NOcx&
* @since 2006-2-2 lMzCDx!m
* @version 1.0 =@KYA(D
*/ Bb[0\Hs7
public class ImprovedMergeSort implements SortUtil.Sort { TnBGMI,g'
]<;i}n| <
private static final int THRESHOLD = 10; y]pN=<*h5
]6%%X+$7
/* u1|P'>;lF
* (non-Javadoc) e=]oh$]
* h NOYFH
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) r{!"%03H_
*/ 3Ra\2(bR
public void sort(int[] data) { S[hJ{0V
int[] temp=new int[data.length]; E"1;i
mergeSort(data,temp,0,data.length-1); ?tC}M;~
} YV3TxvXMR
S7NnC4)=-f
private void mergeSort(int[] data, int[] temp, int l, int r) { /yw\(|T
int i, j, k; 8@W/43K8-
int mid = (l + r) / 2; `^bvj]>l
if (l == r) d+m6-4[_k
return; VVQ74b
if ((mid - l) >= THRESHOLD) (_&V9vat=
mergeSort(data, temp, l, mid); (-'0g@0UA
else UGC|C F2K
insertSort(data, l, mid - l + 1); d[RWkk5
if ((r - mid) > THRESHOLD) n|mJE,N
mergeSort(data, temp, mid + 1, r); >H1|c%w
else .f !]@"\
insertSort(data, mid + 1, r - mid); 7z&adkG:
-90ZI1O`
for (i = l; i <= mid; i++) { F%_,]^ n[
temp = data; 3n84YX{
} zsMw5C
for (j = 1; j <= r - mid; j++) { Fy_<Ui
temp[r - j + 1] = data[j + mid]; p[@oF5M
} _KM$u>B8
int a = temp[l]; hKH$AEHEU}
int b = temp[r]; Ss<_K>wk
for (i = l, j = r, k = l; k <= r; k++) { d1uG[
if (a < b) { IGK_1@tq
data[k] = temp[i++]; Y0L5W;iM
a = temp; Z}K.^\S9
} else { ,+NE:_
data[k] = temp[j--]; ^Azt.\fMX
b = temp[j]; & GzhcW~
} @RoRNat
} 0(hv#C4
} orQV'
17n+4J]
/** *t?~)o7
* @param data J+cAS/MYX
* @param l {Ukc D+.Y
* @param i }[KDE{,V
*/ yYG3/Z3u5
private void insertSort(int[] data, int start, int len) { A1|7(Sow
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); A^4kYOe
} EBIa%,
} vNK`Y|u@
} ezg^5o;
} p'Y&Z?8
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堆排序： FD XWFJ
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package org.rut.util.algorithm.support; @tE&<[e
\C+*loLs
import org.rut.util.algorithm.SortUtil; aJy>
38w.sceaT
/** C)J_lI{^
* @author treeroot (?!(0Ywbg
* @since 2006-2-2 qlz9&w
* @version 1.0 ;e~{TkD
*/ Msv*}^>
public class HeapSort implements SortUtil.Sort{ o8};e
1Es*=zg
/* (non-Javadoc) Y0Hq+7x
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) C>Omng1>^
*/ 2xL!PR-
public void sort(int[] data) { :_o] F
MaxHeap h=new MaxHeap(); _uO!N(k.
h.init(data); Q{.{#G
for(int i=0;i h.remove(); -'O Q-5
System.arraycopy(h.queue,1,data,0,data.length); >/!7i3Ow-
} f%Z;05
L@1,7@
private static class MaxHeap{ J$6-c'8
8 l'bRyuS
void init(int[] data){ >bX-!<S
this.queue=new int[data.length+1]; b(.-~c('
for(int i=0;i queue[++size]=data; e(OwS?K
fixUp(size); D4=..;
} inr%XS/m
} (C-,ljY
DD12pL{QA
private int size=0; zz(!t eBC
;NiArcAS!
private int[] queue; W"b&M%y|
QMXD9H0{
public int get() { O8K@&V p
return queue[1]; `G=ztL!gq
} H4PbO/{xO
zuC58B
public void remove() { z+3<$Z
SortUtil.swap(queue,1,size--); LJRg>8
fixDown(1); ZNzR`6}
} _'!aj+{
file://fixdown &\;<t,3A~
private void fixDown(int k) { T[5gom
int j; 7ei>L]gm%
while ((j = k << 1) <= size) { Q!4i_)rM
if (j < size %26amp;%26amp; queue[j] j++; ${A5-
if (queue[k]>queue[j]) file://不用交换 G0_&gx`
break; ,{.zh&=4
SortUtil.swap(queue,j,k); U0NOU#
k = j; w)45SZ.
} [D*J[?yt
} +3M$3w{2
private void fixUp(int k) { eV[`P&j_C
while (k > 1) { P'a0CE%
int j = k >> 1; qn2o[x
if (queue[j]>queue[k]) E:uReT
break; t{/hkXq]
SortUtil.swap(queue,j,k); ,sO:$
k = j; (H&@u9K?a?
} qSFc=Wwc
} GY oZ$p"C
rPRrx-A
} 38[)[{G)Hv
cvZni#o2)
} bjPka{PBj
K^"w]ii=
SortUtil： I\}|Y+C$d/
YS]>_
package org.rut.util.algorithm; EKqi+T^=F
lp,\]]
import org.rut.util.algorithm.support.BubbleSort; RY9+ 9i
import org.rut.util.algorithm.support.HeapSort; ]vm\3=@}9
import org.rut.util.algorithm.support.ImprovedMergeSort; W[@i;f^g
import org.rut.util.algorithm.support.ImprovedQuickSort; ,/i_QgP
import org.rut.util.algorithm.support.InsertSort; @bY('gC,
import org.rut.util.algorithm.support.MergeSort; @O@fyAz
import org.rut.util.algorithm.support.QuickSort; {SF[I
import org.rut.util.algorithm.support.SelectionSort; J&A;#<qY
import org.rut.util.algorithm.support.ShellSort; M-{*92y& |
}X=87ud
/** w+q?T
* @author treeroot %oAL
* @since 2006-2-2 M6J/mOVx5
* @version 1.0 zL9VR;q
*/ ~}h^38
public class SortUtil { ,5/V@;i
public final static int INSERT = 1; q.-y)C) ;
public final static int BUBBLE = 2; _e6a8
public final static int SELECTION = 3; >R(8/#|E
public final static int SHELL = 4; \M7I&~V
public final static int QUICK = 5; }ppVR$7]0
public final static int IMPROVED_QUICK = 6; CV s8s
public final static int MERGE = 7; *i`v~>
public final static int IMPROVED_MERGE = 8; UE^D2u
public final static int HEAP = 9; +AB6lv
rFhW^fP/
public static void sort(int[] data) { 3AK(dC[ri
sort(data, IMPROVED_QUICK); ?$3r5sx
} w|=gSC-o
private static String[] name={ N6h1|_o
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" 6MuWlCKF8
}; (YIhTSL"]
Z)/6??/R
private static Sort[] impl=new Sort[]{ Kaf>
new InsertSort(), `8,w[o oC2
new BubbleSort(), =K:(&6f<t
new SelectionSort(), fCB:733H
new ShellSort(), JL.5QzA
new QuickSort(), NjbwGcH%\
new ImprovedQuickSort(), 7U,k 2LS
new MergeSort(), UV4u.7y
new ImprovedMergeSort(), kGm:VYf%
new HeapSort() R8tF/dx>7
}; Xtft*Z
5^>n5u/
public static String toString(int algorithm){ ^OF5F8Tf/
return name[algorithm-1]; |=\91fP68`
} Raefj(^V
Tj`yJ!0
public static void sort(int[] data, int algorithm) { ^\:yf.k
impl[algorithm-1].sort(data); a'uU,Eb}#w
} 6)ycmu;!$
jPnO@H1
public static interface Sort { z!:'V]
public void sort(int[] data); y?>#t^
} 27>a#vCT
va5FxF*%
public static void swap(int[] data, int i, int j) { _Fizgs
int temp = data; \83sSw
data = data[j]; k^^:;OR
data[j] = temp; R*yU<9Mm8
} Z v4<b
} !h>D;k6 e