[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; wYS KtG~/S
} D+vl%(g
int i1=l; $M8>SLd
int i2=mid+1; -+S~1`0
for(int cur=l;cur<=r;cur++){ j8ohzX[Y
if(i1==mid+1) /9vMGef@
data[cur]=temp[i2++]; 59%f|.Z)
else if(i2>r) VQW)qOR9
data[cur]=temp[i1++]; \Kzt*C-ZH
else if(temp[i1] data[cur]=temp[i1++]; Al-%j- j@-
else ( _F
data[cur]=temp[i2++]; hvv>UC/
} $/U^/2)
} VlQwVe
f'?6D+Yw~
} 9 %.<V_$
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改进后的归并排序: %>*0.)wG
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package org.rut.util.algorithm.support; 5fDtSsW
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import org.rut.util.algorithm.SortUtil; HDae_.
.WPR}v,.Z
/** WU4vb
* @author treeroot kl{OO%jZ
* @since 2006-2-2 vS,G<V3B
* @version 1.0 />j+7ts
*/ BNKo6:wy
public class ImprovedMergeSort implements SortUtil.Sort { fKK-c9F
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private static final int THRESHOLD = 10; x2IU PM
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/* @W5hrei
* (non-Javadoc) JV6U0$g_S
* r :MaAT<
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) @xM!:
*/ x)qHeS
public void sort(int[] data) { :\= NH0M
int[] temp=new int[data.length]; ~9>[U%D
mergeSort(data,temp,0,data.length-1); ;g)Fhdy!
} ~[/c'3+4qn
.)pRB7O3
private void mergeSort(int[] data, int[] temp, int l, int r) { lIc9,|FL
int i, j, k; %Fm;LQa ]
int mid = (l + r) / 2; ~b<4>"7y.
if (l == r) X]^E:'E!
return; >b"z`{tE
if ((mid - l) >= THRESHOLD) <}'B-k9
mergeSort(data, temp, l, mid); VNEZBy"F
else Ru\Lr=9
insertSort(data, l, mid - l + 1); JX,#W!d
if ((r - mid) > THRESHOLD) 3ijI2Zy
mergeSort(data, temp, mid + 1, r); NCpn^m)Q}
else )Ai%wCzw*
insertSort(data, mid + 1, r - mid); "Ohpb!J9
x]01j4HJ
for (i = l; i <= mid; i++) { 48NXj\L[y
temp = data; 6!D
} H5MAN,`
for (j = 1; j <= r - mid; j++) { 58ZiCvqv
temp[r - j + 1] = data[j + mid]; i}{Q\#=#
} -3%)nV
int a = temp[l]; <|.! Px86
int b = temp[r]; +jZg%$Q!#
for (i = l, j = r, k = l; k <= r; k++) { N#!1@!2BN
if (a < b) { 9^*YYK}%
data[k] = temp[i++]; KGLhl;a
a = temp; GyM%vGl 3
} else { v.&*z48
data[k] = temp[j--]; }eRG$)'
b = temp[j]; kvVz-PJy
} |[7$) $
} l7y`$8Co
} )0V]G{QN
3S|;yOl#X
/** >{)#|pWU
* @param data r!gCh`PiK
* @param l <>/MKMq!
* @param i dC|#l?P
*/ #$rT 4Nc;
private void insertSort(int[] data, int start, int len) { $P9$ ,w4
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); `V2j[Fz
} 6i=wAkn_J
} pXEVI6 }
} ${,eQ\
} Z8n%=(He
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堆排序： 4zDAfi#0
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package org.rut.util.algorithm.support; 8VGXw;(Y,d
(mr`?LI}
import org.rut.util.algorithm.SortUtil; @[Qg}'i
l0 :xQV`
/** s-S"\zX\D
* @author treeroot BcO2* 3
* @since 2006-2-2 $5(%M8qmQ
* @version 1.0 `%I{l
*/ 2l4i-;
public class HeapSort implements SortUtil.Sort{ t|"d#5'
;9\0x
/* (non-Javadoc) Nmq5Tv
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) mzR @P$:36
*/ =zGz|YI*?
public void sort(int[] data) { Rk0rHC6[
MaxHeap h=new MaxHeap(); uy\+#:44d
h.init(data); :2d9ZDyD
for(int i=0;i h.remove(); 5F?g6?j{
System.arraycopy(h.queue,1,data,0,data.length); 9f[[%80
} hRcJ):Wyb
lq9h Dn[p
private static class MaxHeap{ }H^^v[4
^K[tO54
void init(int[] data){ +6-!o,(
this.queue=new int[data.length+1]; lhODNWi
for(int i=0;i queue[++size]=data; KA2B3\
fixUp(size); )yAPYC
} f TtMmz
} p{PYUW"?^
4 V*)0?oYE
private int size=0; n\DT0E]
na; ^/_U@
private int[] queue; :m)?+
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public int get() { NistW+{<
return queue[1]; FeRuZww._J
} 64s;6=
rqo<Xt`
public void remove() { $^ 3 f}IzA
SortUtil.swap(queue,1,size--); SkUP9
fixDown(1); +38P$Koz{r
} tqC#_[~7
file://fixdown "7/YhLq7
private void fixDown(int k) { U2u>A r
int j; oABPGyv
while ((j = k << 1) <= size) { o`Brr:
if (j < size %26amp;%26amp; queue[j] j++; !+l, m8Hly
if (queue[k]>queue[j]) file://不用交换 TC}u[kM
break; xq*yZ5:5Jo
SortUtil.swap(queue,j,k); B1.@K}
k = j; Y>~zt -
} cK@K\AE
} #<3\}*/
private void fixUp(int k) { l!'iLq"K(
while (k > 1) { "VCr^'
int j = k >> 1; Ry~LhU:
if (queue[j]>queue[k]) 7QFEQ}
break; ,FO|'l
SortUtil.swap(queue,j,k); je%12DM
k = j; =?aB@&
} __npX_4%S
} #O ]IXo(5z
(k45k/PAP
} -6>rR{z
2F{IDcJI\
} .[A S
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SortUtil： ~`.%n7
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package org.rut.util.algorithm; [%Xfl7;Wh
9$i`B>C~
import org.rut.util.algorithm.support.BubbleSort; $ 7!GA9Bn
import org.rut.util.algorithm.support.HeapSort; 5}ah%
import org.rut.util.algorithm.support.ImprovedMergeSort; Dh<e9s:
import org.rut.util.algorithm.support.ImprovedQuickSort; T]`" Xl8
import org.rut.util.algorithm.support.InsertSort; (5 hu W7v
import org.rut.util.algorithm.support.MergeSort; XPKcF I=
import org.rut.util.algorithm.support.QuickSort; ( PlNaasV
import org.rut.util.algorithm.support.SelectionSort; ;zODp+4@Q
import org.rut.util.algorithm.support.ShellSort; "(GeW286k
w ?aLWySYT
/** (H^o8J
* @author treeroot %4J?xhd
* @since 2006-2-2 UPF=X)!M
* @version 1.0 O:)@J b2
*/ _aYQ(FO
public class SortUtil { 2ra4t]f6
public final static int INSERT = 1; hI0l2OE
public final static int BUBBLE = 2; `Fr$q1qae{
public final static int SELECTION = 3; i=@*F$,
public final static int SHELL = 4; L4%LE/t|e
public final static int QUICK = 5; n9DFa3
public final static int IMPROVED_QUICK = 6; Tr)[q>
public final static int MERGE = 7; RqR X
public final static int IMPROVED_MERGE = 8; g-36Q~`9v
public final static int HEAP = 9; jT',+
g.Q ?Z{
public static void sort(int[] data) { |1R@Jz`
sort(data, IMPROVED_QUICK); >{Q2S
} 3&f{lsLAC
private static String[] name={ 8pk">"#s
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" ;p8xL)mUP
}; .rHO7c,P~
^gImb`<6-
private static Sort[] impl=new Sort[]{ *6DKUCA/
new InsertSort(), J%'|IwA
new BubbleSort(), +,,~<Vm
new SelectionSort(), SrIynO
new ShellSort(), F44")fY
new QuickSort(), #q%/~-Uk
new ImprovedQuickSort(), '1<QK
new MergeSort(), E:AXnnGKO
new ImprovedMergeSort(), >b0}X)Z+U
new HeapSort() RWYA`
}; ="4)!
KMa?2cJH#
public static String toString(int algorithm){ gC_U7aw
return name[algorithm-1]; LJ?7W,?
} I6+5mv\
"\ md
public static void sort(int[] data, int algorithm) { , {^g}d8
impl[algorithm-1].sort(data); $1YnQgpT
} 1ARIZ;H
QMP:}
public static interface Sort { W;7cF8fu4
public void sort(int[] data); a9%# J^!
} [/FIY!nC?
L-yC'C
public static void swap(int[] data, int i, int j) { E@p9vf->
int temp = data; y$rp1||lH
data = data[j]; ZC"p^~U_e[
data[j] = temp; wbTw\b=
} <#sK~G
} x\WKsc