[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; "P`V|g
} MHmaut#
int i1=l; :Lqz`
int i2=mid+1; `|e?91@vEa
for(int cur=l;cur<=r;cur++){ Bh?K_{e
if(i1==mid+1) i6M_Gk}
data[cur]=temp[i2++]; Au,xIe!t
else if(i2>r) j@$p(P$
data[cur]=temp[i1++]; cx M=#Go
else if(temp[i1] data[cur]=temp[i1++]; $]EG|]"Ns
else 6f/>o$
data[cur]=temp[i2++]; |k3ZdM
} Q-fi(UP
} 8?!=/Sc
o%X@Bz
} :a#Mq9ph!
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改进后的归并排序: >u#c\s
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package org.rut.util.algorithm.support; 8xzEbRNJ)
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import org.rut.util.algorithm.SortUtil; YpMQY-n
&NiDv
/** Q]Q]kj2
* @author treeroot VqV6)6
* @since 2006-2-2 3\WLm4
* @version 1.0 ]+x;tPo
*/ 26un=
public class ImprovedMergeSort implements SortUtil.Sort { 0@z=0}0Z
w%;Z`Xn&u
private static final int THRESHOLD = 10; ORk8^0\
p>7!"RF:U
/* *#{[9d
* (non-Javadoc) CJ0j2e/
* ';4DUhp
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) '|Dm\cy
*/ VXlTA>a }
public void sort(int[] data) { bSsX)wHm
int[] temp=new int[data.length]; ;i?Ao:]
mergeSort(data,temp,0,data.length-1); ?XO$9J
} ~Q%C>
#?L%M
private void mergeSort(int[] data, int[] temp, int l, int r) { }8J77[>/
int i, j, k; N)G.^9
int mid = (l + r) / 2; 3D70`u
if (l == r) 94Mh/A9k
return; 6n37R#(
if ((mid - l) >= THRESHOLD) SFAh(+t
mergeSort(data, temp, l, mid); e 5U<nf
else ] )D\ws)a9
insertSort(data, l, mid - l + 1); M6U/. n
if ((r - mid) > THRESHOLD) :c%vl$
mergeSort(data, temp, mid + 1, r); 0p\R@{
else }2 zJ8A9-
insertSort(data, mid + 1, r - mid); .OA_)J7
(wLzkV/6
for (i = l; i <= mid; i++) { j;@7V4'
temp = data; yEL^Y'x?
} mwLp~z%OX
for (j = 1; j <= r - mid; j++) { #"% ]1={b
temp[r - j + 1] = data[j + mid]; +o})Cs`|=A
} Cc^`M9dP
int a = temp[l]; v{9< ATi
int b = temp[r]; .n]P6t
for (i = l, j = r, k = l; k <= r; k++) { J/Ki]T9
if (a < b) { )? WiO}"
data[k] = temp[i++]; v`8dRVN
a = temp; *fVs|
} else { =BO} hk
data[k] = temp[j--]; UV8,SSDTV
b = temp[j]; bAv>?Xqa
} 1!<k-vt
} bj^YB,iSM
} r J'm>&Ps
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/** +FiM?,G
* @param data |pk1pV |
* @param l RMU]GCa
* @param i [|<2BQX
*/ ':6!f
private void insertSort(int[] data, int start, int len) { g@]G [(
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); FaO=<jYi
} HVG9 C$
} ;\yY*
} > E;`;b
} Wi]Mp7b
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堆排序： sLh9=Kh`
BhC.#u/
package org.rut.util.algorithm.support; Enr8"+.(
vB >7W
import org.rut.util.algorithm.SortUtil; i_8q!CL@{
A9^t$Ii
/** bQc-ryC+.
* @author treeroot EJ&[I%jU
* @since 2006-2-2 X=]FVHV;
* @version 1.0 )+T\LU
*/ 'P(S*sr
public class HeapSort implements SortUtil.Sort{ 6c-y<J+&s
~*R"WiDtI
/* (non-Javadoc) $rFLhp}
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) GQ~wx1jj1
*/ L2:v#c()#)
public void sort(int[] data) { _IiTB
MaxHeap h=new MaxHeap(); {p&M(W]
h.init(data); *cn,[
for(int i=0;i h.remove(); ],{b&\
System.arraycopy(h.queue,1,data,0,data.length); !C>}j* 4
} =jZ}@L/+
Y(QLlJ*)/
private static class MaxHeap{ Ia-`x/r*m
E'qGKT
void init(int[] data){ >g8H
this.queue=new int[data.length+1]; D.?Rc'yD
for(int i=0;i queue[++size]=data; ~_^#/BnAl
fixUp(size); k fS44NV
} 0 =#)-n
} h6c0BmS{1
t3%[C;@wB
private int size=0; & yFS
meQ>mW
private int[] queue; }& ;49k
(izGF;N+
public int get() { RB7?T5G
return queue[1]; 92g#QZs&W
} ?g*#ld()
3B|?{U~
public void remove() { s"5f5Cn/Wh
SortUtil.swap(queue,1,size--); Xk=bb267
fixDown(1); ]A)`I
} kGbtZ} W
file://fixdown &c<0g`x
private void fixDown(int k) { a?#v,4t^
int j; !qe,&JL
while ((j = k << 1) <= size) { !.>TF+]
if (j < size %26amp;%26amp; queue[j] j++; QRbiO
if (queue[k]>queue[j]) file://不用交换 PYWp2V/
break; X1Vx6+[
SortUtil.swap(queue,j,k); \%Wu`SlDp9
k = j; 5&V0(LT]C
} R7YLI1ov
} (3kz(6S
private void fixUp(int k) { 3(D!]ku~m
while (k > 1) { KG:CVIW Y
int j = k >> 1; rXR=fj= 2
if (queue[j]>queue[k]) WN8XiV
break; ,m<t/@^]
SortUtil.swap(queue,j,k); yhF{ cK=
k = j; yu8xTh$:
} k@QU<cvI
} V2-fJ!
_?]E)i'RI
} w7d(|`
CMk0(sztU_
} 2xy &mNx
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SortUtil： V'[Lqe,y
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package org.rut.util.algorithm; Lo"w,p`n@
AWkXWl}
import org.rut.util.algorithm.support.BubbleSort; dN'2;X
import org.rut.util.algorithm.support.HeapSort; $#q:\yQsPC
import org.rut.util.algorithm.support.ImprovedMergeSort; \ZSZ(p#1
import org.rut.util.algorithm.support.ImprovedQuickSort; q1C) *8*g
import org.rut.util.algorithm.support.InsertSort; rybs9:_}
import org.rut.util.algorithm.support.MergeSort; cs0;:H*N*
import org.rut.util.algorithm.support.QuickSort; 09FHE/L
import org.rut.util.algorithm.support.SelectionSort; ,khB*h14;h
import org.rut.util.algorithm.support.ShellSort; t+C9QXY
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/** Y`$dtg {
* @author treeroot AUCk]
* @since 2006-2-2 !*Hgl\t6a
* @version 1.0 M=vRy|TL
*/ 70s.
public class SortUtil { t;?M#I\,{
public final static int INSERT = 1; ;+pS-Zb 6
public final static int BUBBLE = 2; N>8pA)
public final static int SELECTION = 3; Z4+S4cqnh
public final static int SHELL = 4; ce3w0UeV
public final static int QUICK = 5; Z/#l~.o[
public final static int IMPROVED_QUICK = 6; )a:j_jy
public final static int MERGE = 7; _ U/[n\oC
public final static int IMPROVED_MERGE = 8; Skm$:`u;
public final static int HEAP = 9; Ur^~fW1o
jSLC L'
public static void sort(int[] data) { y*i_Ec\h
sort(data, IMPROVED_QUICK); Ln~Z_!
} GTvp)^h
private static String[] name={ $"VgNynq
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" O3H~|R+^
}; *dB^B5
Wz}DC7
private static Sort[] impl=new Sort[]{ Dw\)!,,i7U
new InsertSort(), gWlv;oq
new BubbleSort(), mc{gcZIm
new SelectionSort(), cRt[{HE
new ShellSort(), )"Ef* /+
new QuickSort(), kJ^)7_3
new ImprovedQuickSort(), mM*jdm(!
new MergeSort(), cT8b$P5w
new ImprovedMergeSort(), R4xoc;b
new HeapSort() rLt`=bl&&U
}; ED9uKp<Wbv
r3~~4Q4XI>
public static String toString(int algorithm){ #9HQW:On
return name[algorithm-1]; s06tCwPp
} 3_%lN4sz
wW5:p]<Y
public static void sort(int[] data, int algorithm) { Jptzc:~B
impl[algorithm-1].sort(data); B.:DW3
} dy>iIc>
RL0#WBR
public static interface Sort { 8#NI`s*
public void sort(int[] data); qx#k()E.U
} oH;0_!
o: \&4z&=
public static void swap(int[] data, int i, int j) { al{;]>W
int temp = data; V1aWVLltj
data = data[j]; TDvUiJm
data[j] = temp; 41\r7 BS
} j/I^\Ms
} *hJ&7w ~