[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; R9HS%O6b6
} p 8rAtz>=J
int i1=l; 6<O]_HZ&
int i2=mid+1; ?XrTZ{5'
for(int cur=l;cur<=r;cur++){ oMf h|B
if(i1==mid+1) `{;&Qcg6m
data[cur]=temp[i2++]; ,o6: V]a
else if(i2>r) f2XD^:Gc
data[cur]=temp[i1++]; 'v5gg2
else if(temp[i1] data[cur]=temp[i1++]; +#9 (T
else }e|]G,NZO
data[cur]=temp[i2++]; bm|8Jbsb&
} RGOwm~a
} x=+H@YO\
xrd^vE
} XAkl,Y
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改进后的归并排序: 2sq<"TlQXI
/d;l:
package org.rut.util.algorithm.support; >eI(M $
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import org.rut.util.algorithm.SortUtil; g_=ZcGC
YkbLf#2AE|
/** ;bmd<1
* @author treeroot L@uKE jR
* @since 2006-2-2 @[lr F7`o
* @version 1.0 v-@@>?W-
*/ M1\/ueOe
public class ImprovedMergeSort implements SortUtil.Sort { ->UrWW^
efm<bJB2
private static final int THRESHOLD = 10; <taW6=;c
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/* \U8Vsx1tl
* (non-Javadoc) ~CscctD{;
* L"0L_G
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) Vy VC#AK,
*/ [0emOS
public void sort(int[] data) { R8)"M(u=l
int[] temp=new int[data.length]; =XB)sC%
mergeSort(data,temp,0,data.length-1); 8X5XwFf}
} pe-d7Ou P
C_/oORvK
private void mergeSort(int[] data, int[] temp, int l, int r) { g*uO IF
int i, j, k; i)ctrdP-
int mid = (l + r) / 2; ,v+SD\7|
if (l == r) J0k~%
return; |iI`p-L9
if ((mid - l) >= THRESHOLD) %K4-V5f
mergeSort(data, temp, l, mid); D.~t#a A
else 9"e!0Q40
insertSort(data, l, mid - l + 1); [%pZM.jFO
if ((r - mid) > THRESHOLD) qJsEKuOs
mergeSort(data, temp, mid + 1, r); N C&1l]
else xN]bRr
insertSort(data, mid + 1, r - mid); _rv_-n]"o
SzDi=lY
for (i = l; i <= mid; i++) { j!l(ReGb
temp = data; 5sH ee,
} (~~=<0S
for (j = 1; j <= r - mid; j++) { >8##~ZuF+
temp[r - j + 1] = data[j + mid]; _cB~?c
} Ic*Q(X
int a = temp[l]; &}oDSD H^,
int b = temp[r]; /"U<0jot
for (i = l, j = r, k = l; k <= r; k++) { QB7<$Bp
if (a < b) { [3s~Z8 pP
data[k] = temp[i++]; <Aa%Uwpc
a = temp; b#F3,T__`Y
} else { F{[Q
data[k] = temp[j--]; "](~VF[J8
b = temp[j]; 0bor/FU-d
} A U](pXK;
} zK&`&("4C
} GZ1>]HB>r^
9Ah4N2nL-b
/** C-(&zwj?!
* @param data pJmn;XbME
* @param l B`vV[w?
* @param i 8ViDh
*/ '&`Zy pq
private void insertSort(int[] data, int start, int len) { (b(iL\B$D=
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); |Bjb
} uwbj`lpf
} pCq{F*;
} ZjzQv)gZ
} U@9n7F
]'"$qm:
堆排序： `0L!F"W
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package org.rut.util.algorithm.support; {h2D}F
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import org.rut.util.algorithm.SortUtil; aJub("
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/** z2r{AQ.&
* @author treeroot >Zr`9$i
* @since 2006-2-2 N(D_*% 96
* @version 1.0 ;&iQNXL
*/ k'm!|
public class HeapSort implements SortUtil.Sort{ wL:3RZB
-Z @cj
/* (non-Javadoc) uoF9&j5E@Z
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) U5" C"+ 3
*/ =|H/[",gg
public void sort(int[] data) { |W?x6]~.R
MaxHeap h=new MaxHeap(); Up8#Nz T
h.init(data); !bQ5CB
for(int i=0;i h.remove(); 0%v p'v
System.arraycopy(h.queue,1,data,0,data.length); 4\t9(_
} 9=:!XkT.
P>:"\I[
private static class MaxHeap{ @;pTQ 5 I
}E*#VA0/nY
void init(int[] data){ sq*sbdE
this.queue=new int[data.length+1]; s@0#w*N
for(int i=0;i queue[++size]=data; PX+$Us
fixUp(size); 9"&HxyOfX
} 7,Nd[ oL*7
} ^lf)9 `^U
\!`*F:7]-
private int size=0; ^ygN/a>rr
Y*J,9
private int[] queue; hmQD-E{Ab
Nn+leM
public int get() { iYR8sg[' #
return queue[1]; "J$vt`
} #TRPq>XzD
2UA h^i-^
public void remove() { BoXQBcG]w
SortUtil.swap(queue,1,size--); [/6IEt3}B
fixDown(1); [26"?};"%
} B]#0]-ua
file://fixdown y1B3F5
private void fixDown(int k) { 5_#wOz0u$
int j; .(ki(8Z N
while ((j = k << 1) <= size) { "2$C_aE
if (j < size %26amp;%26amp; queue[j] j++; slXk <
if (queue[k]>queue[j]) file://不用交换 )Yy`$`
break; ^dld\t:tV7
SortUtil.swap(queue,j,k); >^{}Hjt
k = j; vA*!82
} {O[a+r.n
} gM '_1zs U
private void fixUp(int k) { 8N'[)Jw
while (k > 1) { YOqGFi~`
int j = k >> 1; \IQf|
if (queue[j]>queue[k]) ?l &S:` L
break; .IE2d%]?
SortUtil.swap(queue,j,k); ML9ZS @
k = j; GFB(c
} jA?A)YNQb
} mR)Xq=
7LbBS:@3z_
} pHXslmrD
_8v8qT}O~4
} kl,I.2-
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SortUtil： w^6rgCl
KmG*`Es
package org.rut.util.algorithm; ^~'tQ}]!"
%}elh79H*
import org.rut.util.algorithm.support.BubbleSort; wuRQ H]N
import org.rut.util.algorithm.support.HeapSort; [+\=x[q
import org.rut.util.algorithm.support.ImprovedMergeSort; 9)9p<(b$
import org.rut.util.algorithm.support.ImprovedQuickSort; 5|z>_f.^pS
import org.rut.util.algorithm.support.InsertSort; .jA'BF.
import org.rut.util.algorithm.support.MergeSort; ^K. d|z
import org.rut.util.algorithm.support.QuickSort; Xn@\p5<
import org.rut.util.algorithm.support.SelectionSort; NCR4n_
import org.rut.util.algorithm.support.ShellSort; gG*]|>M JI
6[b'60CuZL
/** _IYd^c
* @author treeroot $a.fQ<,\X
* @since 2006-2-2 lQ(I/[qVd
* @version 1.0 xVw9_il2a
*/ -!V+>.Oh
public class SortUtil { ldk (zAB.
public final static int INSERT = 1; Zq1ZrwPF
public final static int BUBBLE = 2; O=m_P}K
public final static int SELECTION = 3; $23*:)&J4
public final static int SHELL = 4; rHYSS0*3
public final static int QUICK = 5; %:Mi6sR|
public final static int IMPROVED_QUICK = 6; M~/7thP{
public final static int MERGE = 7; wzX(]BG
public final static int IMPROVED_MERGE = 8; bvn%E H
public final static int HEAP = 9; KTLq~Ru
} V *
public static void sort(int[] data) { VgGMlDl
sort(data, IMPROVED_QUICK); 8k[=$Ro
} ZW+M<G
private static String[] name={ n92*:Y
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" }OZut!_
}; *ay&&S*
*~Y$8!ad
private static Sort[] impl=new Sort[]{ <e&88{jJ
new InsertSort(), Odn`q=
new BubbleSort(), 80m<OW1
new SelectionSort(), )WWqi,T}
new ShellSort(), ;@ <E
new QuickSort(), 0c}pg:XT
new ImprovedQuickSort(), ]F'o
new MergeSort(), |NMf'$
new ImprovedMergeSort(), |; [XZ ZZ
new HeapSort() :<}1as!eo
}; {4]sJT
~W/|RP7S
public static String toString(int algorithm){ ,]Gi942
return name[algorithm-1]; #!.26RM:P
} eeMeV>
_s{;9&qX]
public static void sort(int[] data, int algorithm) { pZxuV(QP`
impl[algorithm-1].sort(data); npCiqO
} 2K:Rrn/cR
C(Cuk4K
public static interface Sort { {)`tN&\
public void sort(int[] data); 1ze\ U>
} b}APD))*H!
/}\Uw
public static void swap(int[] data, int i, int j) { l/i7<q
int temp = data; a>H8,a
data = data[j]; F`Ld WA
data[j] = temp; xfzGixA
} XM#xxf* Y
} R3bHX%T