[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; ?Tc)f_a
} >[XOMKgQ](
int i1=l; co^P7+j
int i2=mid+1; Krr?`n
for(int cur=l;cur<=r;cur++){ $}^\=p}X
if(i1==mid+1) N=Uc=I7C
data[cur]=temp[i2++]; @ojg`!,
else if(i2>r) h76NR
data[cur]=temp[i1++]; \'??
else if(temp[i1] data[cur]=temp[i1++]; Jn[q<e"
else qBBYckS.
data[cur]=temp[i2++]; I#S~
} n-y^7'v
} iijd$Tv
pcuMGo-#
} yF/< :
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改进后的归并排序: s0)qlm*
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package org.rut.util.algorithm.support; O,=Q1*c,&
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import org.rut.util.algorithm.SortUtil; 9uw,-0*5
hnsa)@
/** lbKv
* @author treeroot Tw`c6^%^y
* @since 2006-2-2 vfJ3idvo*w
* @version 1.0 oDW<e'Jm
*/ I(^jOgYU
public class ImprovedMergeSort implements SortUtil.Sort { T6R7,Vt'v
EtR@sJ<
private static final int THRESHOLD = 10; })zB".
Jcalf{W6
/* J-, H6u
* (non-Javadoc) ]Z.<c$
* m]0^
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) !bZhj3.
*/ piYws<Q
public void sort(int[] data) { Bbl)3$`,
int[] temp=new int[data.length]; O^X[9vrW
mergeSort(data,temp,0,data.length-1); m~Y'$3w
} vZ[$H
:7$\X[
private void mergeSort(int[] data, int[] temp, int l, int r) { ^_*jp[!`b$
int i, j, k; {DEzuU
int mid = (l + r) / 2; ZL-uwI!`D
if (l == r) t<!+b@l5
return; YQ8j
if ((mid - l) >= THRESHOLD) P\22op_te-
mergeSort(data, temp, l, mid); h/ LR+XX!
else jh 7p62R
insertSort(data, l, mid - l + 1); W(uP`M%][0
if ((r - mid) > THRESHOLD) QJM-`(
mergeSort(data, temp, mid + 1, r); $[M}K
else jiA5oX^g
insertSort(data, mid + 1, r - mid); U`bC>sCp
_W@,@hOH
for (i = l; i <= mid; i++) { fa!3/X+
temp = data; lFp!XZ!
} f MY;
for (j = 1; j <= r - mid; j++) { -+3be(u
temp[r - j + 1] = data[j + mid]; a%7"_{s1
} 1<LC8?wt
int a = temp[l]; %_B:EMPd
int b = temp[r]; ' "ZRD_"
for (i = l, j = r, k = l; k <= r; k++) { )l+XDI
if (a < b) { #&^ZQs<
data[k] = temp[i++]; H$~M`Y9I~
a = temp; |8&-66pX
} else { !X5o7b)
data[k] = temp[j--]; \LIy:$`8
b = temp[j]; ~In{lQ[QX
} ; g Z%U
} fKL'/?LD]
} )"(V*Z
g2g`,"T
/** X'V+^u@W
* @param data <@u0.-]
* @param l N<KKY"?I'
* @param i {PN:bb
*/ \We"?1^
private void insertSort(int[] data, int start, int len) { 98ca[.ui
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); Xtci0eS#V
} )^t!|*1LA
} Ms.PO{wb
} R#Y50hzT
} [ 3$.*
tO?21?AD D
堆排序： \e?.hmq
w) =eMdj\o
package org.rut.util.algorithm.support; f!5F]qP>-
kx|me~I
import org.rut.util.algorithm.SortUtil; -L@]I$Yo
x S
/** -1Djo:y
* @author treeroot [X;>*-
* @since 2006-2-2 %z(9lAe
* @version 1.0 WwW"fkv
*/ pG0!ALT
public class HeapSort implements SortUtil.Sort{ |if'_x1V
|WB"=PE
/* (non-Javadoc) WI,40&<
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) CfQf7-
*/ fH-NU-"
public void sort(int[] data) { j h; 9 [
MaxHeap h=new MaxHeap(); iPMB$SdfO
h.init(data); @q,)fBZq
for(int i=0;i h.remove(); Q2*/`L}m\
System.arraycopy(h.queue,1,data,0,data.length); N1PECLS?
} O x{Q.l
|kId8WtA
private static class MaxHeap{ q#;BhPc
m'd^?Qc
void init(int[] data){ ;xL67e%?
this.queue=new int[data.length+1]; 1+R:3(AC
for(int i=0;i queue[++size]=data; GA.BI"l
fixUp(size); SV&kWbS
} V?=TVI*k
} aw1P5aPmX
ir]Mn.(Y
private int size=0; \0D$Mie
/^J2B8y
private int[] queue; ?p(kh^z
rxQ<4
public int get() { ICk(z~D~
return queue[1]; WS5A Y @(~
} -<6v:Z
]K7`-p~T
public void remove() { x7f:F.
SortUtil.swap(queue,1,size--); !;i*\ a
fixDown(1); USprsaj
} FS8S68
file://fixdown 6{Ks`Af
private void fixDown(int k) { +Z ><
int j; +i+tp8T+7
while ((j = k << 1) <= size) { k,T_e6(
if (j < size %26amp;%26amp; queue[j] j++; |H:<:*=6c
if (queue[k]>queue[j]) file://不用交换 s,w YlVYf!
break; 9GThyY
SortUtil.swap(queue,j,k); 8zAg;b[
k = j; 9X3yp:>V
} \4aKLr
} G[#.mD{k
private void fixUp(int k) { Khj=llo,
while (k > 1) { h77IWo6%
int j = k >> 1; 9[kX/#~W*
if (queue[j]>queue[k]) 8\DME
break; w$b~x4y%
SortUtil.swap(queue,j,k); 0F^]A"kF
k = j; }?J~P%HpF
} 82|q7*M*.
} zwnw'
Oo kxg *!5
} Ss 2$n
Z9xR
} ^1.7Juvb
$:e)$Xnn-
SortUtil： P])L8zK
s{ =5-:
package org.rut.util.algorithm; +lKrj\Xj
^T{8uJ'kn
import org.rut.util.algorithm.support.BubbleSort; ?NlSeh
import org.rut.util.algorithm.support.HeapSort; [7RheXO<
import org.rut.util.algorithm.support.ImprovedMergeSort; b"t")U==
import org.rut.util.algorithm.support.ImprovedQuickSort; \BUqDd!
import org.rut.util.algorithm.support.InsertSort; R>*g\}9Zh3
import org.rut.util.algorithm.support.MergeSort; & N;pH
import org.rut.util.algorithm.support.QuickSort; E3f9<hm
import org.rut.util.algorithm.support.SelectionSort; Q3,=~}ZNK
import org.rut.util.algorithm.support.ShellSort; -?5$ PH
Q<yAT(w
/** Jh?z=JY
* @author treeroot n26>>N
* @since 2006-2-2 ;b1wk^,Hw~
* @version 1.0 gH'_ymT= 3
*/ o!utZmk$
public class SortUtil { 6|^0_6_
public final static int INSERT = 1; %9X{{_
public final static int BUBBLE = 2; /$Z m~Mp
public final static int SELECTION = 3; \6:>{0\
public final static int SHELL = 4; 2h<U
public final static int QUICK = 5; y@`~9$
public final static int IMPROVED_QUICK = 6; b_l3+'#ofM
public final static int MERGE = 7; wLUF v(&C
public final static int IMPROVED_MERGE = 8; U{}!y3[wK
public final static int HEAP = 9; Af9+HI O
"J!}3)n
public static void sort(int[] data) { (f~gEKcB2u
sort(data, IMPROVED_QUICK); uB;_vC
} /[iG5~G
private static String[] name={ 69/?7r
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" (zC
}; t:=k)B
H_Os4}
private static Sort[] impl=new Sort[]{ Yx),6C3
new InsertSort(), $/paEn"
new BubbleSort(), _88QgThb
new SelectionSort(), Y\p$SN
new ShellSort(), 8R}K?+]
new QuickSort(), @!<d0_dnC
new ImprovedQuickSort(), V&[eSVY?
new MergeSort(), U(~U!O}
new ImprovedMergeSort(), 4V$fGjJ3
new HeapSort() -`Q}tg>cT
}; AK*N
HIGNRm
public static String toString(int algorithm){ m?;$;x~Dj
return name[algorithm-1]; %2D17*eK
} |l7%l&!
4P%m>[
public static void sort(int[] data, int algorithm) { .*!#98pT
impl[algorithm-1].sort(data); 9afh[3qm
} *,lh:
ax_YKJ5#P
public static interface Sort { \QT9HAdd@
public void sort(int[] data); 8;#AO8+U7)
} 6IP$n($2
!5UfWk\G
public static void swap(int[] data, int i, int j) { X>t3|h
int temp = data; 9P.(^SD][z
data = data[j]; RqLNp?V%
data[j] = temp; 8QF2^*RZ7z
} *QH[,F`I
} M3(k'q7&: