[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; ; R&wr_%
} tO)mKN+ (
int i1=l; 2^E.sf$f
int i2=mid+1; e%U0^! 8
for(int cur=l;cur<=r;cur++){ vtv|H
if(i1==mid+1) 5yuj}/PZ
data[cur]=temp[i2++]; +0;6.PK
else if(i2>r) D7olu29
data[cur]=temp[i1++]; &^{HD }/{b
else if(temp[i1] data[cur]=temp[i1++]; |t!kD(~r
else Vqb4 MWW
data[cur]=temp[i2++]; b Zn:q[7
} 8uchp
} xCEEv5(5
#dtYa
} JC_Y#kN@z
tTLD6#
改进后的归并排序: ;Bat!K7W
C*,-lk0b@
package org.rut.util.algorithm.support; [C,<Q
K;sH0*
import org.rut.util.algorithm.SortUtil; cuB~A8H#}
w\:-lXw
/** :0Rd )*k,v
* @author treeroot u-qg9qXJb
* @since 2006-2-2 7(QRG\G#
* @version 1.0 FL,jlE_
*/ 6p1\#6#@
public class ImprovedMergeSort implements SortUtil.Sort { S>/p6}3]
|-e*^|
private static final int THRESHOLD = 10; gG>1
gah3d*d7
/* <_dyUiT$J
* (non-Javadoc) Yo/U/dB
* \|F4@
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) hJ (Q^Z
*/ ~>VEg3#F
public void sort(int[] data) { `|XE B
int[] temp=new int[data.length]; [V|,O'X ~
mergeSort(data,temp,0,data.length-1); rh5R kiF~
} lF2im5nZ?
t>)iC)^u
private void mergeSort(int[] data, int[] temp, int l, int r) { ra0:Lg'
int i, j, k; Vl%AN;o
int mid = (l + r) / 2; m.iCGX
if (l == r) rr>QG<i;G
return; o8-BTq8
if ((mid - l) >= THRESHOLD) {KxeH7S
mergeSort(data, temp, l, mid); w4Qqo(
else [2pp)wq
insertSort(data, l, mid - l + 1); 6iVjAxR
if ((r - mid) > THRESHOLD) '_lyoVP
mergeSort(data, temp, mid + 1, r); zH0%; o}
else [ >O4hifq
insertSort(data, mid + 1, r - mid); 9z$]hl
WS/^WxRY
for (i = l; i <= mid; i++) { *p`0dvXG2
temp = data; /`Yy(?,
} 5Q#;4
for (j = 1; j <= r - mid; j++) { w},' 1
temp[r - j + 1] = data[j + mid]; DJ_,1F
} Uq5wN05
int a = temp[l]; I= G%r/3
int b = temp[r]; ZR.1SA0x?O
for (i = l, j = r, k = l; k <= r; k++) { ng0IRJ:3
if (a < b) { w,bILv)
data[k] = temp[i++]; 5+vCuVZ
a = temp; |Zr5I";
} else { ;5:g%Dt
data[k] = temp[j--]; x#-uf
b = temp[j]; UCj4%y6t
} L$=@j_V2
} ]( V+ qj
} [R+zzl&Zw
r(y1^S9!8
/** !rZO~a0
* @param data |R8=yO%(
* @param l veFl0ILd
* @param i Gtd!Y x
*/ XSyCT0f08
private void insertSort(int[] data, int start, int len) { lhw]?\
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); gh=s#DQsFw
} Z4A a
} 1sl^+)z8
} 7}OzTup
} Fvf308[
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堆排序： I+Qv$#S/
w$n\`rQ
package org.rut.util.algorithm.support; sOg@9-_Uh
5LbU'5
import org.rut.util.algorithm.SortUtil; qR4('
^h{AAS>
/** d"<Q}Ay
* @author treeroot ^.5L\
* @since 2006-2-2 DQ :w9
* @version 1.0 )f-ux5
*/ 0#lw?sv
public class HeapSort implements SortUtil.Sort{ _QbLg"O
C9E l {f
/* (non-Javadoc) )A:2y +
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) %y)5:]
*/ VgtWT`F.I
public void sort(int[] data) { 1@q~(1-o
MaxHeap h=new MaxHeap(); +(0Fab8g
h.init(data); 9r-]@6;
for(int i=0;i h.remove(); TC[_Ip&
System.arraycopy(h.queue,1,data,0,data.length); lTJ1]7)
} dya]^L}fL
T=35?
private static class MaxHeap{ 9w'3d@
06"p^#
void init(int[] data){ !<H[h4g
this.queue=new int[data.length+1]; m(>_C~rGN
for(int i=0;i queue[++size]=data; Xt~`EN
fixUp(size); 4o8uWS{`
} 5W"nn
} mA}-hR%
oJe9H<
private int size=0; P1;T-.X~&
g9|B-1[
private int[] queue; Qna ^Ry?6)
!-b4@=f:
public int get() { ,cPNZ-%
return queue[1]; rLs)*A!
} Y^m2ealC
+N5#EpW
public void remove() { 2ME"=!&5
SortUtil.swap(queue,1,size--); 0JQy-hpF
fixDown(1); UZ0fw@RM
} ;"SnCBt:>
file://fixdown $3S6{"
private void fixDown(int k) { j89|hG)2
int j; tRRPNY
while ((j = k << 1) <= size) { LuY`mi
if (j < size %26amp;%26amp; queue[j] j++; ?Y+xuY/t
if (queue[k]>queue[j]) file://不用交换 cE>K:3n
break; ^ AxU
SortUtil.swap(queue,j,k); \bYuAE1q
k = j; ljVtFm<
} YW"}hU
} -Bbg'=QZa
private void fixUp(int k) { t5mI)u
while (k > 1) { vK6YU9W~J
int j = k >> 1; hDJq:g wD
if (queue[j]>queue[k]) {MdxIp[
break; zIt-mU
SortUtil.swap(queue,j,k); U^vQr%ha
k = j; s^ rO I~
} Nv "R'Pps
} *vv<@+gA
aSd$;t~
} 1MHP#X;|
0cZyO$.
} dl;~-'0
p 2xOjS1
SortUtil： Cj%SW <v|
#P*%FgROl
package org.rut.util.algorithm; dQ?4@
qKt8sxg
import org.rut.util.algorithm.support.BubbleSort; V&vU her0
import org.rut.util.algorithm.support.HeapSort; /:v+:-lU
import org.rut.util.algorithm.support.ImprovedMergeSort; 'Wjuv9)/
import org.rut.util.algorithm.support.ImprovedQuickSort; H `y.jSNi
import org.rut.util.algorithm.support.InsertSort; v1<gNb)`
import org.rut.util.algorithm.support.MergeSort; 9 tkj:8_
import org.rut.util.algorithm.support.QuickSort; &?>h#H222
import org.rut.util.algorithm.support.SelectionSort; K];nM}<
import org.rut.util.algorithm.support.ShellSort; O-Hu:KuIf
I\DmVc\l
/** T:o!H Xdj^
* @author treeroot |0FRKD]
* @since 2006-2-2 t^ LXGQ
* @version 1.0 c_c]0Tm
*/ ;tTM3W-h
public class SortUtil { 'c5#M,G~
public final static int INSERT = 1; \eF5* {9
public final static int BUBBLE = 2; 4"1OtBU3
public final static int SELECTION = 3; D}'g4Ag
public final static int SHELL = 4; mj5$ 2J
public final static int QUICK = 5; Ol H{!
public final static int IMPROVED_QUICK = 6; ;~T)pG8IS
public final static int MERGE = 7; j}XTa[
public final static int IMPROVED_MERGE = 8; Q1EY!AV8
public final static int HEAP = 9; #%z--xuJL
#Z<pks2 y
public static void sort(int[] data) { [:sPZ{
sort(data, IMPROVED_QUICK); %y.9S=,v,
} &;L4Cj$q
private static String[] name={ }MP2)6
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" FP<RoA?W
}; l=D E|:
c_clpMx=
private static Sort[] impl=new Sort[]{ v'i"Q
new InsertSort(), y_J~n 9R
new BubbleSort(), *bRer[7y
new SelectionSort(), !iUdej^tx
new ShellSort(), H6E@C}cyM
new QuickSort(), ,Hh7'`
new ImprovedQuickSort(), MuB8gSu
new MergeSort(), 3GqJs
new ImprovedMergeSort(), /]%,C
new HeapSort() u^a\02aV[
}; ya5a7
#3u3WTk+
public static String toString(int algorithm){ & tQHxiDX
return name[algorithm-1]; y?O{J!U
} HRIf)n&~f
*V#v6r7<Y/
public static void sort(int[] data, int algorithm) { UXD?gK1
impl[algorithm-1].sort(data); 7Z5,(dH>
} 84L!r
r5Ej
public static interface Sort { y@]4xLB]
public void sort(int[] data); sN|-V+7&j
} >C"cv^%c
;OQ-T+(T
public static void swap(int[] data, int i, int j) { d='z^vHK
int temp = data; .vNfbYH(
data = data[j]; ka{9{/dz3
data[j] = temp; Jpg_$~k
} &RRggPx"k
} EceZ1b