[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; NP^kbF
} ]Wv\$JXI
int i1=l; P RX:*0
int i2=mid+1; o&LNtl;
for(int cur=l;cur<=r;cur++){ [>?B`1;@
if(i1==mid+1) 8 s:sMU:Q
data[cur]=temp[i2++]; )n|:9hc
else if(i2>r) {u46m
data[cur]=temp[i1++]; jPA?0h
else if(temp[i1] data[cur]=temp[i1++]; a50{gb#
else |n~,$
data[cur]=temp[i2++]; G*Z4~-E4*
} {?BxVDD07
} UO<%|{W+
Z10#6v
} <(@m913|
}L@!TWR-Qu
改进后的归并排序: uj;-HN)6
Y@^MU->+
package org.rut.util.algorithm.support; k9WihejS
gnB%/g[_
import org.rut.util.algorithm.SortUtil; /_woCLwQ#
zj`!ZY?fv
/** @;d(>_n
* @author treeroot C8@SuJ
* @since 2006-2-2 (?YTQ8QR
* @version 1.0 hMeE@Q0
*/ 0sk*A0HX-
public class ImprovedMergeSort implements SortUtil.Sort { i v&:X3iB
_i6G)u&N
private static final int THRESHOLD = 10; AVi w}Y J
^B> 4:+^
/* x@Z?DS$)
* (non-Javadoc) SAc}5.
* )5)S8~Oc
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) K )1K ]
*/ {&"rv<p
public void sort(int[] data) { ezCsbV;. [
int[] temp=new int[data.length]; W9{6?,]
mergeSort(data,temp,0,data.length-1); 6 }qNH29
} TpuN[Y
N6EH
private void mergeSort(int[] data, int[] temp, int l, int r) { X]tjT
int i, j, k; ;0P2nc:U~
int mid = (l + r) / 2; mn?< Zz
if (l == r) Qp!r_a&
return; ^zO%O653
if ((mid - l) >= THRESHOLD) kdITh9nx<r
mergeSort(data, temp, l, mid); [^P25K
else [9~Bau
insertSort(data, l, mid - l + 1); #ZRQVC;b;
if ((r - mid) > THRESHOLD) ?msx
mergeSort(data, temp, mid + 1, r); ,X)0+DNsq
else 7?qRY9Qu
insertSort(data, mid + 1, r - mid); /H^=`[Mr
;Q:^|Fw!F
for (i = l; i <= mid; i++) { J,_I$* _0
temp = data; uqnoE;57^
} }>6=(!
for (j = 1; j <= r - mid; j++) { uw&GXOzew9
temp[r - j + 1] = data[j + mid]; S`5^H~
} KaZ*HPe(
int a = temp[l]; 88$G14aXEk
int b = temp[r]; 8h78Zb&[
for (i = l, j = r, k = l; k <= r; k++) { H"tS33
if (a < b) { ` Cdk b5
data[k] = temp[i++]; ,i;kAy)
a = temp; ^GB9!d.
} else { Y]0oF_ :7
data[k] = temp[j--]; WXp=>P[
b = temp[j]; ;l[/<J
} 5-0
} O{,Uge2n,
} r3mB"("Z'
C=t:0.:PJ
/** $h`?l$jC(@
* @param data fJtJ2xi
* @param l { KE[8n
* @param i [9u/x%f(
*/ )**k3u t4
private void insertSort(int[] data, int start, int len) { 72GXgah
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); aEW Z*y
} 57'=Qz52
} .taJCE
} :W_S
} 4d)w2t?H%
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堆排序： Uq 2Uv
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package org.rut.util.algorithm.support; y,tA~
hV;Tm7I2
import org.rut.util.algorithm.SortUtil; r*C:)z.}
c@1C|
/** w6y?D<
* @author treeroot B08q/qi
* @since 2006-2-2 @I2m4Q{O
* @version 1.0 KW+ps16~
*/ S3PW[R@=
public class HeapSort implements SortUtil.Sort{ N+rLbK*
[-bL>8
/* (non-Javadoc) 12])``9
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) yL^1s\<ddW
*/ ={ c=8G8T
public void sort(int[] data) { pMM-LY7%{
MaxHeap h=new MaxHeap(); :!;BOCTYI
h.init(data); `W e M
for(int i=0;i h.remove(); e<dFvMO
System.arraycopy(h.queue,1,data,0,data.length); g-U'{I5F
} ~j" aJ /
=L{lt9qQz
private static class MaxHeap{ )fP,F(
J\b,rOIf
void init(int[] data){ 8)&yjY
this.queue=new int[data.length+1]; =\e}fyuK
for(int i=0;i queue[++size]=data; h ^g"FSzP
fixUp(size); &NZN_%
} 6*cm
} Qf0$Z.-
k$y(H;XA
private int size=0; N*$<Kjw
C(b"0>
private int[] queue; Bs =V-0
1*S It5?4
public int get() { @=h%;"
return queue[1]; l %=yT6
} E D*=8s2
P5*:r3>
public void remove() { 6_=qpP-?
SortUtil.swap(queue,1,size--); "B*a| 'n!
fixDown(1); 9*GwW&M%1_
} 5s8S;Pb]<
file://fixdown fc._*y#AS
private void fixDown(int k) { F8Z<JcOI
int j; w5gN8ZF3
while ((j = k << 1) <= size) { `* "u"7e
if (j < size %26amp;%26amp; queue[j] j++; VQU[5C
if (queue[k]>queue[j]) file://不用交换 ^_9 ^iL
break; h>sz@\{
SortUtil.swap(queue,j,k); 7Gnslp?[U
k = j; }oigZI(1
} ~fI&F|
} m8n!<_NFt(
private void fixUp(int k) { SKuZik_
while (k > 1) { G]E$U]=9r:
int j = k >> 1; Y'i0=w6G
if (queue[j]>queue[k]) !CtY.Lp
break; kFgN^v^t
SortUtil.swap(queue,j,k); *=ftg&
k = j; )MZ]c)JD^
} #bUWF|zfT
} .{k(4_Q?I
bW;0E%_
} Q-F'-@`(C
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} J_}&Btb)e
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SortUtil： *h1Zqb
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package org.rut.util.algorithm; 1B'i7
1,`-n5@J%n
import org.rut.util.algorithm.support.BubbleSort; cBmo#:>'
import org.rut.util.algorithm.support.HeapSort; $;>,
import org.rut.util.algorithm.support.ImprovedMergeSort; l~Kn-S{
import org.rut.util.algorithm.support.ImprovedQuickSort; k^Tu9}[W1
import org.rut.util.algorithm.support.InsertSort; AJ2Xq*fk
import org.rut.util.algorithm.support.MergeSort; ItDe_|!L
import org.rut.util.algorithm.support.QuickSort; vNLf)B
import org.rut.util.algorithm.support.SelectionSort; ~^lQ[x
import org.rut.util.algorithm.support.ShellSort; U(-9xp+
j$T2ff6
/** -le:0NUwI
* @author treeroot #I%< 1c%XA
* @since 2006-2-2 }1TfKS]m>
* @version 1.0 9r+`j
*/ }zRYT_:
public class SortUtil { 6NbIT[LvT
public final static int INSERT = 1; idGkX ?
public final static int BUBBLE = 2; f<xF+wE
public final static int SELECTION = 3; -}{\C]%
public final static int SHELL = 4; 7$x@;%xd
public final static int QUICK = 5; AS|gi!OVA
public final static int IMPROVED_QUICK = 6; [4kx59J3b
public final static int MERGE = 7; 9XT6Gf56
public final static int IMPROVED_MERGE = 8; 'gUHy1p
public final static int HEAP = 9; &w2.b:HF
WaWT 5|A
public static void sort(int[] data) { dmP*2
sort(data, IMPROVED_QUICK); fL83:<RK
} \b.2f+;3
private static String[] name={ @MtF^y
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" `C=!8q
}; hrZ~7 0r
b$PNZC8f
private static Sort[] impl=new Sort[]{ &BG^:4b
new InsertSort(), zY[6Ia{L
new BubbleSort(), J2aA"BhdC"
new SelectionSort(), 7*'_&0
new ShellSort(), QlJCdCSy
new QuickSort(), s=q\BmG
new ImprovedQuickSort(), ]_d(YHYf
new MergeSort(), wIxLr{
new ImprovedMergeSort(), rcxV ,<[B
new HeapSort() GaRL]w
}; p]!,BoZL
cJ!wZT`
public static String toString(int algorithm){ 3WPMS/
return name[algorithm-1]; |+!Jr_ By
} umrRlF4M;
L2{tof
public static void sort(int[] data, int algorithm) { YvBUx#\
impl[algorithm-1].sort(data); ><\mt
} &JfyXM[]
ywq{9)vq
public static interface Sort { hH"3Y}U@
public void sort(int[] data); 7dPA>5"XD
} >/e#Z h
O(&EnNm[2
public static void swap(int[] data, int i, int j) { ;-*4 (3lu
int temp = data; V_+3@C
data = data[j]; 'QCvN b6
data[j] = temp; . s? ''/(
} M?}2
} aEZl ICpU7