[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; "W~vSbn7
} R.cR:fA
int i1=l; >p'{!k
int i2=mid+1; K^ ALE
for(int cur=l;cur<=r;cur++){ ~1{ppc+
if(i1==mid+1) m%=*3gH]&
data[cur]=temp[i2++]; y,/i3^y#_
else if(i2>r) [+_>g4M~%
data[cur]=temp[i1++]; &$ud;r#
else if(temp[i1] data[cur]=temp[i1++]; .TCDv4?
else pD('6C;
data[cur]=temp[i2++]; !hFhw1
} 4xH/a1&p=
} FA+"t^q
7]9,J(:Ed
} c8T| o=`k6
Gt+rVJ=v
改进后的归并排序: 53 -Owjpx
)KEW`BC5T
package org.rut.util.algorithm.support; H'JU5nE
PW82 Vp.
import org.rut.util.algorithm.SortUtil; Au6Y]
.)SR3?
/** f!#+cM
* @author treeroot +w-J;GLSy
* @since 2006-2-2 a|jZg
* @version 1.0 oKCv$>Y
*/ K:^0*5Y-k
public class ImprovedMergeSort implements SortUtil.Sort { `2hg?(ul
w {"1V7|
private static final int THRESHOLD = 10; jwUX?`6jX
+H28F_#
/* T2 S fBs
* (non-Javadoc) VFzIBgJ3
* I]DD5l}\
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) g+5c"Yk+u~
*/ LM+d3|gSV
public void sort(int[] data) { C}(@cn `L
int[] temp=new int[data.length]; Y%eq2%
mergeSort(data,temp,0,data.length-1); C$0g2X
} ~d].<Be
tJ 2GSZ`
private void mergeSort(int[] data, int[] temp, int l, int r) { .`Q^8|$-K
int i, j, k; tbWfm5$
int mid = (l + r) / 2; {VKFw=$8
if (l == r) ]Axz}:
return; EY:IwDA.}
if ((mid - l) >= THRESHOLD) *AYq:n6
mergeSort(data, temp, l, mid); ""Da2Md
else ;1s+1G}_z
insertSort(data, l, mid - l + 1); #n}~u@,o_
if ((r - mid) > THRESHOLD) 6i2%EC9
mergeSort(data, temp, mid + 1, r); z DU=2c4W9
else loO"[8i.k
insertSort(data, mid + 1, r - mid); L SP p
'&'m#H*:
for (i = l; i <= mid; i++) { 9}u,`&
temp = data; Xjkg7p,HD@
} DY9]$h*y
for (j = 1; j <= r - mid; j++) { IvT><8<G
temp[r - j + 1] = data[j + mid]; +[<YE
} AYgXqmH~+
int a = temp[l]; fCwE1r*^
int b = temp[r]; DU0/if9.
for (i = l, j = r, k = l; k <= r; k++) { B6Eu."T
if (a < b) { 993f6
data[k] = temp[i++]; :aK?DtZ
a = temp; :8!RGtn
} else { 5nUJ9sqA
data[k] = temp[j--]; Ml7 (<J
b = temp[j]; ;8eKAh
} __2<v?\
} P RWb6
} Qr9;CVW
?oFd%|I
/** 6,aH[>W
* @param data *<\K-NSL
* @param l BMy3tyO
* @param i @phVfP"M
*/ fEX=csZ86
private void insertSort(int[] data, int start, int len) { X!p`|i
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); %VH,(}i
} nuXL{tg6
} =o~GLbsER
} #3QPcoxa
} b7Jxv7$e
v6s,lC5qR
堆排序： dF\#:[B
V`1,s~"q
package org.rut.util.algorithm.support; pL5cw=
1^4:l!0D
import org.rut.util.algorithm.SortUtil; )](ls@*
I5_HaC>
/** /\c'kMAW!
* @author treeroot %'yrIR
* @since 2006-2-2 <;6{R#Tuh
* @version 1.0 {]< G=]'
*/ 8o$rF7.-
public class HeapSort implements SortUtil.Sort{ eHuJFM
M'PZ{6;
/* (non-Javadoc) njF$1? )sq
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) Lr:Qc#2
*/ ?: yz/9(
public void sort(int[] data) { {aUnOyX_
MaxHeap h=new MaxHeap(); [mA-sl]
h.init(data); A^>@6d $2
for(int i=0;i h.remove(); 3R3H+W0{
System.arraycopy(h.queue,1,data,0,data.length); ~w+I2oS$
} G aV&y
<qwf"Ey
private static class MaxHeap{ N2v/<
(4T0U5jgT
void init(int[] data){ 5e/YEDP
this.queue=new int[data.length+1]; x,!Dd
for(int i=0;i queue[++size]=data; 1)56ec<c
fixUp(size); <X:JMj+
} }l|S]m!
} 6OAs%QZ
#$I@V4O;#
private int size=0; WVdV:vJ-
.|Huzk+
private int[] queue; UqOBr2UmG
;!MQ@Fi^
public int get() { %.Ma_4o Z
return queue[1]; -B *W^-;*
} C9!t&<\}
@-'a{hBR
public void remove() { q 84*5-
SortUtil.swap(queue,1,size--); FH+X<
fixDown(1); *M1GVhW(+
} Y~WdN<g
file://fixdown 0O9b 7F
private void fixDown(int k) { C#kE{Qw10r
int j; ^#HaH
while ((j = k << 1) <= size) { #ES[),+|mB
if (j < size %26amp;%26amp; queue[j] j++; "' JnFM
if (queue[k]>queue[j]) file://不用交换 /MGapmqV9
break; |9#q7kM
SortUtil.swap(queue,j,k); {A/r)
k = j; EtKq.<SJ
} +/~]fI
} Xp:A;i9
private void fixUp(int k) { {]k#=a4
while (k > 1) { +e>SK!kB7
int j = k >> 1; #ibwD:{
if (queue[j]>queue[k]) UK ':%LeL
break; ]n!V
SortUtil.swap(queue,j,k); U?*zb
k = j; 3~~X,ZL
} Mg;pNK\n
} ~_\Ra%
S6<o?X9,I
} ]pn U"
|U%NPw5
} 'J,UKK\5
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SortUtil： r#sg5aS7O|
~#r>@C
package org.rut.util.algorithm; aZN?V}^+
FDMQLxf
import org.rut.util.algorithm.support.BubbleSort; Zhfp>D
import org.rut.util.algorithm.support.HeapSort; Uwc%'=@
import org.rut.util.algorithm.support.ImprovedMergeSort; Lce,]z\_
import org.rut.util.algorithm.support.ImprovedQuickSort; g\q .
import org.rut.util.algorithm.support.InsertSort; xMJ-=
import org.rut.util.algorithm.support.MergeSort; j&8YE7
import org.rut.util.algorithm.support.QuickSort; 6}^x#9\
import org.rut.util.algorithm.support.SelectionSort; sL$sj|"S
import org.rut.util.algorithm.support.ShellSort; p&(0e,`z/
-9b=-K.y
/** 1bFZyD"
* @author treeroot \p4*Q}t
* @since 2006-2-2 .]v>LsbhF
* @version 1.0 OrkcY39"~a
*/ N]P~`)
public class SortUtil { gP%<<yl
public final static int INSERT = 1; 3:,%>#"
public final static int BUBBLE = 2; !>sA.L&=
public final static int SELECTION = 3; X-\$<DiJGv
public final static int SHELL = 4; suN6(p(.
public final static int QUICK = 5; 9xQ|Uad+%
public final static int IMPROVED_QUICK = 6; /5,6{R9
public final static int MERGE = 7; S7+>Mk
public final static int IMPROVED_MERGE = 8; y\FQt];z)
public final static int HEAP = 9; :'[?/<iTg
1=5"j]0hY
public static void sort(int[] data) { O*u
sort(data, IMPROVED_QUICK); %J*1F
} Q9bnOvKe|
private static String[] name={ xA3_W
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" K)'[^V Xh
}; )I%M]K]F
+~V%R{h
private static Sort[] impl=new Sort[]{ T<uX[BO-a
new InsertSort(), Ua}R3^_)a
new BubbleSort(), w7MRuAJ4
new SelectionSort(), rEa(1(I
new ShellSort(), jJ2rfdfj
new QuickSort(), O60T.MM`
new ImprovedQuickSort(), 59.$;Ip;g
new MergeSort(), z 0?MeH#
new ImprovedMergeSort(), 4Wl`hF
new HeapSort() Es[3Ppz
}; lMgguu~qg
CEj_{uf|
public static String toString(int algorithm){ Te+#
return name[algorithm-1]; #VhdYDbW
} y;az&T
q,[;AHb
public static void sort(int[] data, int algorithm) { }R*%q
impl[algorithm-1].sort(data); l"J#Pvi
} JAxzXAsAR
g3ukx$Q{>
public static interface Sort { C^$E#|E9N
public void sort(int[] data); Ku'a,\7z
} =ls+vH40&
JrBPx/?(,;
public static void swap(int[] data, int i, int j) { Yup#aeXY/
int temp = data; tar/no
data = data[j]; Bl>m`/\1i
data[j] = temp; ;1~n|IY
} nKE^km
} "/R?XCBZsb