[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; +;#z"m]
} B|I9Ex~L
int i1=l; =bKz$ _W
int i2=mid+1; XS#Jy n
for(int cur=l;cur<=r;cur++){ '0b!lVe
if(i1==mid+1) n<,:;0{
data[cur]=temp[i2++]; <DeC^[-P
else if(i2>r) 3bK.8
data[cur]=temp[i1++]; |NMf'$
else if(temp[i1] data[cur]=temp[i1++]; lKVV*RR}
else G.{)#cR
data[cur]=temp[i2++]; qe/dWJBa
} LOO<)XFJ
} {^8->V
o,NTIh
} , B90r7K:
s8:-*VR9
改进后的归并排序: P55QE+B
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package org.rut.util.algorithm.support; +jD*Jtb<
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import org.rut.util.algorithm.SortUtil; jK(]eiR$S
FH3^@@Y%
/** t GS>f>i
* @author treeroot o|en"?4
* @since 2006-2-2 VZz>)Kz:
* @version 1.0 2K:Rrn/cR
*/ 6[x6:{^J
public class ImprovedMergeSort implements SortUtil.Sort { ]&b>P ;j:
u=QG%O#B
private static final int THRESHOLD = 10; tRtoA5
XfZ^,'z
/* OUtXu7E$
* (non-Javadoc) D`4>Wh/H
* ?zpN09e
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 6lAHB*`
*/ BcaX:C?f
public void sort(int[] data) { 6%A_PP3Z
int[] temp=new int[data.length]; X,mqQ7+
mergeSort(data,temp,0,data.length-1); P1_ZGeom*
} S x0QPX
!Y,*Zc$R
private void mergeSort(int[] data, int[] temp, int l, int r) { &;2@*#,
int i, j, k; I.>SC
int mid = (l + r) / 2; 5Tg[-tl
if (l == r) ozOvpi:k3%
return; O<>cuW(l
if ((mid - l) >= THRESHOLD) &_dM2lj{
mergeSort(data, temp, l, mid); #I9hKS{
else #qDMUN*i
insertSort(data, l, mid - l + 1); (:r80:
if ((r - mid) > THRESHOLD) %~rXJrK
mergeSort(data, temp, mid + 1, r); MJ_]N+
else )|N_Q}
insertSort(data, mid + 1, r - mid); V`& O`
i"RBk%
for (i = l; i <= mid; i++) { Z=.$mFE\
temp = data; yt[vd8O'c
} 9#MY(Hr
for (j = 1; j <= r - mid; j++) { Hs`j6yuc9
temp[r - j + 1] = data[j + mid]; _O;2.M%@
} hdN[wC]
int a = temp[l]; p*C|kEqk
int b = temp[r]; ;7*R;/
for (i = l, j = r, k = l; k <= r; k++) { G?dxLRy.do
if (a < b) { nXJG4$G
data[k] = temp[i++]; We)l_>G
a = temp; a+=.(g
} else { 1+ib(MJ<:#
data[k] = temp[j--]; ~cH3RFV
b = temp[j]; 5DS'22GW`
} htu(R$GSM
} $d\>^Q
} 2H9;4>ss
)WH;G:$&"
/** *-`-P
* @param data [BZA1,
* @param l <x[CL,Zg7
* @param i ]9PQKC2&
*/ ?Rd{`5.D
private void insertSort(int[] data, int start, int len) { VdOcKP.
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); =-%10lOI
} fP8iz `n
} P}~nL
} &rfl(&\oUi
} N9cCfB\`
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堆排序： DkJ "#8Yl=
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package org.rut.util.algorithm.support; /8Ru O
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import org.rut.util.algorithm.SortUtil; $_f"NE}
.I%`yhCW
/** E+z"m|G
* @author treeroot <44A*ux
* @since 2006-2-2 kHbH{])
* @version 1.0 *bSxobn
*/ *?3c2Jg=E
public class HeapSort implements SortUtil.Sort{ Ku`u%5<
$(fhO
/* (non-Javadoc) .K`EflN
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) wCgi@\
*/ {'a|$u+
public void sort(int[] data) { {$QkerW3
MaxHeap h=new MaxHeap(); ~-f"&@){,
h.init(data); H&SoVi_V
for(int i=0;i h.remove(); o2rL&
System.arraycopy(h.queue,1,data,0,data.length); S!8gy,7<J
} G$A=Tu~
0sfb$3y
private static class MaxHeap{ zVvL!
*ry}T=
void init(int[] data){ -gB9476-
this.queue=new int[data.length+1]; :r4o:@N'
for(int i=0;i queue[++size]=data; -]Y@_T.C
fixUp(size); 3eERY[
} pD17r}%
} 6wq>&P5
.R]DT5
private int size=0; gP.PyYUV
Yfr4<;%
private int[] queue; ''Hx&
/Ref54
public int get() { N|e#&
return queue[1]; ?/q\S
} 4o|<zn
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public void remove() { mqK}yK^P]
SortUtil.swap(queue,1,size--); @!Rklhb
fixDown(1); Q.,2G7[ <
} 8Z!Mad
file://fixdown T#GTNk!v
private void fixDown(int k) { 5tl($j
int j; Q 6n!u;
while ((j = k << 1) <= size) { 3IG<Ot9
if (j < size %26amp;%26amp; queue[j] j++; "A]#KTP
if (queue[k]>queue[j]) file://不用交换 } 89-U
break; <DZ$"t
SortUtil.swap(queue,j,k); kRqe&N e
k = j; '81c>qA
} CUnBi?Mi
} GK=b
private void fixUp(int k) { fS$;~@p
while (k > 1) { Z;y(D_;_
int j = k >> 1; hgK 4;R
if (queue[j]>queue[k]) =Q*x=}NH
break; s#H_QOE
SortUtil.swap(queue,j,k); N6HeZB":
k = j; l[<U UEjZJ
} H/y,}z
} y96HTQ32
\Oxyc}&
} d:pGdr& .
H[RX~Xk2E
} -B& Nou
{fJCj152.
SortUtil： E[cH/Rm
r+k g$+%b
package org.rut.util.algorithm; jG{OLF6 !
~REfr}0
import org.rut.util.algorithm.support.BubbleSort; zGNmc7
import org.rut.util.algorithm.support.HeapSort; G#fF("Ndu`
import org.rut.util.algorithm.support.ImprovedMergeSort; i1ScXKO
import org.rut.util.algorithm.support.ImprovedQuickSort; sC A
import org.rut.util.algorithm.support.InsertSort; =Z ql6D
import org.rut.util.algorithm.support.MergeSort; H?rCIS0
import org.rut.util.algorithm.support.QuickSort; yy Y\g
import org.rut.util.algorithm.support.SelectionSort; O(6j:XD
import org.rut.util.algorithm.support.ShellSort; Y/sZPG}4
03c8VKp'p
/** ~owodc
* @author treeroot ^J;rW3#N8
* @since 2006-2-2 C TKeY
* @version 1.0 ]iMqIh"
*/ Z~].v._YV)
public class SortUtil { Zo,066'+[.
public final static int INSERT = 1; YmCu\+u
public final static int BUBBLE = 2; GT<!e]=6
public final static int SELECTION = 3; &?$mS'P
public final static int SHELL = 4; aS``fE;O
public final static int QUICK = 5; |`xM45
public final static int IMPROVED_QUICK = 6; RO@=&3s
public final static int MERGE = 7; hd]ts.
public final static int IMPROVED_MERGE = 8; R?IRE91 :
public final static int HEAP = 9; Y?3f Fg
[+_>g4M~%
public static void sort(int[] data) { b:cy(6G(
sort(data, IMPROVED_QUICK); <_c8F!K)T
} bjo}95
private static String[] name={ 9s1^hW2%Q
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" 7Ie=(x8):
}; LmytO$?2(
fm L8n<1
private static Sort[] impl=new Sort[]{ }|%1LL^pB
new InsertSort(), hI9q);g
new BubbleSort(), <PiO %w{
new SelectionSort(), ^qzH(~g{M
new ShellSort(), Qj'Ik`o
new QuickSort(), 9w~SzpJ%
new ImprovedQuickSort(), F0~<p[9Nx
new MergeSort(), &B]1 VZUp
new ImprovedMergeSort(), 9VanR ::XX
new HeapSort() `ZbFky{
}; !*f$*,=^
[2Zl '+
public static String toString(int algorithm){ skBD2V4
return name[algorithm-1]; oEX^U4/=
} 91]sO%3
k<5g
public static void sort(int[] data, int algorithm) { >ZW|wpO
impl[algorithm-1].sort(data); Z/dhp0k
} 4Us_Z{.
]x{.qTtw
public static interface Sort { r?IBmatK/
public void sort(int[] data); 0zE@?.
} k(M:#oA!
QZtQogNy#
public static void swap(int[] data, int i, int j) { rOz1tY)l0d
int temp = data; 4v`IAR?&K;
data = data[j]; .!Pg)|
data[j] = temp; uovv">Uw
} [h8s0
} %~y>9K