[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; $&KkZ
} |d*a~T0
int i1=l; lmD[Cn
int i2=mid+1; n9`]}bnX
for(int cur=l;cur<=r;cur++){ G43r85LO
if(i1==mid+1) {P_7AM
data[cur]=temp[i2++]; Fkq^2o ]
else if(i2>r) ;z N1Qb
data[cur]=temp[i1++]; +{I" e,Nk
else if(temp[i1] data[cur]=temp[i1++]; %%>nM'4<
else |\G^:V[.
data[cur]=temp[i2++]; 1+XM1(|c`
} cGdYfi
} (}.MB3`#C
p3{Ff5FZ
} DZ\K7-
N@}h
改进后的归并排序: ?2dI8bG
YhS_ ,3E
package org.rut.util.algorithm.support; ^m&P0
u#Jr_ze
import org.rut.util.algorithm.SortUtil; 32%Fdz1S
*h3iAcM8
/** K5BL4N
* @author treeroot #d-zH:uq
* @since 2006-2-2 &vn2u bauS
* @version 1.0 +`g&hO\W
*/ TB+k[UxB
public class ImprovedMergeSort implements SortUtil.Sort { NMf#0Nz-
g=@d!]Z~[
private static final int THRESHOLD = 10; ^+CHp(X
~!8j,Bqs+z
/* vlE]RB
* (non-Javadoc) 7}6CUo
* ms&1P
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 0H_uxkB~
*/ A1,q3<<D%
public void sort(int[] data) { 0BhcXHt
int[] temp=new int[data.length]; ]W`?0VwF
mergeSort(data,temp,0,data.length-1); ,$>l[G;Bm
} X:;x5'|
J@6j^U
private void mergeSort(int[] data, int[] temp, int l, int r) { tH.L_< N
int i, j, k; QeuM',6R
int mid = (l + r) / 2; =|ODa/2p
if (l == r) [3nWxFz$R
return; {B4qeG5
if ((mid - l) >= THRESHOLD) g3>>gu#0DC
mergeSort(data, temp, l, mid); hd~#I<8;2
else vO~Tx
insertSort(data, l, mid - l + 1); CEc(2q+%i
if ((r - mid) > THRESHOLD) ]77f`<q<}!
mergeSort(data, temp, mid + 1, r); [WG\wj.
else *qk7e[IP
insertSort(data, mid + 1, r - mid); liH#=C8l*%
Dm5 Uy^F}
for (i = l; i <= mid; i++) { Y7r;}^+WY
temp = data; }l[e@6r F
} U$& '>%#
for (j = 1; j <= r - mid; j++) { vIOGDI>
temp[r - j + 1] = data[j + mid]; K.Y`/<
} ,1N|lyV
int a = temp[l]; /o'lGvw
int b = temp[r]; :W1?t*z:[
for (i = l, j = r, k = l; k <= r; k++) { .'<K$:8@|
if (a < b) { H${LF.8
data[k] = temp[i++]; Y_+#|]=$B
a = temp; 'o#oRK{#
} else { 9*ZlNZ
data[k] = temp[j--]; F=1 #qo<?
b = temp[j]; 1(IZ,*i
} P@vUQ
} L-D4>+
} PDuBf&/e
% _E?3
/** ~o"=4q`>
* @param data 8{2
* @param l o9"?z
* @param i U{M3QOF
*/ @=dv[P"jn
private void insertSort(int[] data, int start, int len) { x0(bM g>7
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); 2(@2z[eKr
} xwof[BnEZ
} |`#fX(=
} E(|A"=\
} #5)/B
T[k$[
堆排序： |yeQz
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package org.rut.util.algorithm.support; 6` TwP\!$/
Z}uY%]
import org.rut.util.algorithm.SortUtil; )-Hs]D:
}" vxYB!h3
/** Qa )+Tv
* @author treeroot 2WFZ6
* @since 2006-2-2 $a*7Q~4
* @version 1.0 7N[".V]c
*/ NOXP}M
public class HeapSort implements SortUtil.Sort{ `HXv_9
zH}3J}
/* (non-Javadoc) 5buW\_G)
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) iiIns.V
*/ _Ik?WA_;
public void sort(int[] data) { 2RX]~}
MaxHeap h=new MaxHeap(); b^h_`
h.init(data); a- rR`
for(int i=0;i h.remove(); @`4T6eL5
System.arraycopy(h.queue,1,data,0,data.length); ^WO3,
} :)lG}c
|di(hY|
private static class MaxHeap{ S=!WFKcJR
<7\j\`
void init(int[] data){ i3N{Dt
this.queue=new int[data.length+1]; \~E?;q!
for(int i=0;i queue[++size]=data; WT<}3(S'?
fixUp(size); v-3VzAd=*&
} K_)~&Cu*'
} ^rVHaI
U`qC.s(L
private int size=0; hFi gY\$m
bt)C+|i
private int[] queue; U+x^!{[/
JVX)>2&$
public int get() { h{^v756L
return queue[1]; )4=86>XJT
} OA&'T*)-A6
E.Xp\Dm71
public void remove() { M0fN[!*z
SortUtil.swap(queue,1,size--); iv~R4;;)
fixDown(1); vYm:V:7Y2
} "@eGgQ
file://fixdown I0~'z f
private void fixDown(int k) { .h=n [`RB
int j; 1Z< ^8L<
while ((j = k << 1) <= size) { 8>eYM
if (j < size %26amp;%26amp; queue[j] j++; ;um)JCXz
if (queue[k]>queue[j]) file://不用交换 l&+O*=#Hh
break; A[+)PkR
SortUtil.swap(queue,j,k); *HR pbe2
k = j; ?K[Y"*y2
} ay7\Ae]
} `CS\"|z
private void fixUp(int k) { FE!jN-#
while (k > 1) { Ur xiaE
int j = k >> 1; ;m7G8)I
if (queue[j]>queue[k]) TUnAsE/J&
break; 'cpm 4mT
SortUtil.swap(queue,j,k); &>Ve4!i q
k = j; Hh^ "c}
} =\%ER/
} dXh[Ea^
vYV!8o.I
} B<SE|~\2
Ux=~-}<-w
} #("M4}~
,yGbMOV
SortUtil： $UH:r
y<FC7
package org.rut.util.algorithm; uMw6b=/U
Q&]|W Xv
import org.rut.util.algorithm.support.BubbleSort; w/*G!o-<
import org.rut.util.algorithm.support.HeapSort; toPbFU'
import org.rut.util.algorithm.support.ImprovedMergeSort; 7?whxi Qs
import org.rut.util.algorithm.support.ImprovedQuickSort; D5c 8sB
import org.rut.util.algorithm.support.InsertSort; u @Ze@N%
import org.rut.util.algorithm.support.MergeSort; S=r0tao,!v
import org.rut.util.algorithm.support.QuickSort; TxPFl7,r
import org.rut.util.algorithm.support.SelectionSort; -orRmn6}
import org.rut.util.algorithm.support.ShellSort; %@vF%
2X\Pw
/** -H6[{WVW!
* @author treeroot wPM>-F
* @since 2006-2-2 IQO|)53)
* @version 1.0 >g{&Qx`&
*/ P_A@`eU0
public class SortUtil { wH o}wp
public final static int INSERT = 1; 1;(h0j
public final static int BUBBLE = 2; JW[6 ^Rw
public final static int SELECTION = 3; D-BT`@~l
public final static int SHELL = 4; |iHMAo
public final static int QUICK = 5; g& e u
public final static int IMPROVED_QUICK = 6; EU[eG^/0@
public final static int MERGE = 7; dB_0B.
public final static int IMPROVED_MERGE = 8; J]TqH`MA
public final static int HEAP = 9; _l7_!Il_
`Jc/ o=]
public static void sort(int[] data) { rgVRF44X{
sort(data, IMPROVED_QUICK); P$U"y/
} H\QkU`b
private static String[] name={ W\zZ&*8$
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" We{@0K/O
}; MMFg{8
G*N[tw
private static Sort[] impl=new Sort[]{ `Qo37B2
new InsertSort(), Mm@G{J\\
new BubbleSort(), I%J>~=]n_
new SelectionSort(), z+yq%O
new ShellSort(), kZG.Id
new QuickSort(), ?) y}HF
new ImprovedQuickSort(), a|z-EKV
new MergeSort(), v](Y n)#
new ImprovedMergeSort(), eI$V2
new HeapSort() <9,h!
}; MG vz-E1e
s9+):,dKP
public static String toString(int algorithm){ *Mhirz%iD
return name[algorithm-1]; ~".@mubt1$
} I.3~ctzu
V,rc&97
public static void sort(int[] data, int algorithm) { -E?:W`!
impl[algorithm-1].sort(data); o^~ZXF}
} ~g=&wT11
@\&j3A
public static interface Sort { $"vz>SuB
public void sort(int[] data); d2UidDU5qa
} F NPu
? #rXc%F
public static void swap(int[] data, int i, int j) { oY^I|FEOz
int temp = data; Yc]V+NxxQ
data = data[j]; K2Abu?
data[j] = temp; /7D5I\
} l48$8Mgrr
} 'UsR/h5T