[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; s'HD{W`
} _r Y,}\
int i1=l; ;@mRo`D`
int i2=mid+1; Sr Ca3PA
for(int cur=l;cur<=r;cur++){ _'0 @%P%
if(i1==mid+1) X"asfA[6K
data[cur]=temp[i2++]; *A}WP_ZQ
else if(i2>r) (GKpA}~R
data[cur]=temp[i1++]; wEft4o
else if(temp[i1] data[cur]=temp[i1++]; 'o4p#`R:8
else XFwLz
data[cur]=temp[i2++]; ub:ly0;t
} f'En#-?O
} aEVsU|
<O~WB
} \FmKJ\
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改进后的归并排序: ,?cH"@RJ
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package org.rut.util.algorithm.support; y*b3&%.ml
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import org.rut.util.algorithm.SortUtil; u0s8yPA
oDB`iiBXQ
/** P1>AOH2yG
* @author treeroot JgRYljQi2
* @since 2006-2-2 k;yw#Af8
* @version 1.0 ]2SF9p_
*/ R3.*dqo$
public class ImprovedMergeSort implements SortUtil.Sort { `8_z!)
TYns~X_PR
private static final int THRESHOLD = 10; "h"NW[R
T<b+s#n4
/* []kN16F
* (non-Javadoc) AIijCL
* n| !@1sd
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) !vD{Df>
*/ AasZuO_I
public void sort(int[] data) { `RRE(SiKU
int[] temp=new int[data.length]; R=j% S!
mergeSort(data,temp,0,data.length-1); BHFY%6J!
} }CGSEr4'w~
/s:fW+C
private void mergeSort(int[] data, int[] temp, int l, int r) { xG2+(f#C1
int i, j, k; _D7]-3uC!
int mid = (l + r) / 2; m#e3%150{
if (l == r) {D&9UZm
return; UL@9W6
if ((mid - l) >= THRESHOLD) s,]%dG!
mergeSort(data, temp, l, mid); X|LxV]
else U/{6% Qy
insertSort(data, l, mid - l + 1); Zi\['2CG
if ((r - mid) > THRESHOLD) W-~n|PX8+
mergeSort(data, temp, mid + 1, r); U977#MXf
else tAu4haa4;
insertSort(data, mid + 1, r - mid); 5II(mSg8
2;3f=$3
for (i = l; i <= mid; i++) { Kn;D?ioY
temp = data; &BE g
} vV?rpe|%
for (j = 1; j <= r - mid; j++) { c"tJld5F_
temp[r - j + 1] = data[j + mid]; vdDludEv
} sJx+8 -
int a = temp[l]; &[mZD,
int b = temp[r]; ./6<r OW
for (i = l, j = r, k = l; k <= r; k++) { 0C%W&;r0
if (a < b) { AV8T
data[k] = temp[i++]; u"xJjS
a = temp; K0pac6]
} else { sM[I4.A3
data[k] = temp[j--]; _6@hTen`
b = temp[j]; UaG1c%7?X
} 3riw1r;Q
} UYP9c}_,4
} _jU5O;
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/** V%0I%\0Y
* @param data IeX^4rc(
* @param l G9P!_72
* @param i '\#EIG
*/ ?L) !pP]
private void insertSort(int[] data, int start, int len) { RkEN ,xWE
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); Joe_PS
} :G w~7v_
} >ydRSr^
} hg@}@Wq\)
} 3voT^o
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堆排序： tMx}*l|]
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package org.rut.util.algorithm.support; )jrT6x^IB
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import org.rut.util.algorithm.SortUtil; (6p]ZY
#zUXyT#X
/** "[p@tc?5
* @author treeroot rZPT89M6
* @since 2006-2-2 N/QiI.V6
* @version 1.0 LK9g0_
*/ $4FX(O0Q@
public class HeapSort implements SortUtil.Sort{ 3-Dt[0%{
w2O!M!1
/* (non-Javadoc) 98jN)Nl,oD
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) xda; K~w
*/ M]v=-
public void sort(int[] data) { U).*q?.z
MaxHeap h=new MaxHeap(); $*a'84-5G-
h.init(data); ?YM4b5!3T
for(int i=0;i h.remove(); /Ss7"*JLe
System.arraycopy(h.queue,1,data,0,data.length); %h"z0@+
} d'6|:z9c
w@\vHH.;V
private static class MaxHeap{ (UCK;k
Qcjc,
void init(int[] data){ x3ERCqTR
this.queue=new int[data.length+1]; 5l-mW0,MK
for(int i=0;i queue[++size]=data; YT/kC'A
fixUp(size); PYRd]%X
} ^I6^g
} zjL.Bhiud
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private int size=0; jDM w2#<
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private int[] queue; ;{[>&4
~9\WFF/
public int get() { \qvaE+
return queue[1]; u}bf-;R
} ow=UtA-^O
Si9Z>MR
public void remove() { Q^K"8 ;
SortUtil.swap(queue,1,size--); ]{~NO{0@Y
fixDown(1); <mMTD8Sx]
} P|2E2=G
file://fixdown %Pqk63QF
private void fixDown(int k) { j;_c+w!P
int j; Q zZ;Ob]'
while ((j = k << 1) <= size) { Z4$cyL'$P
if (j < size %26amp;%26amp; queue[j] j++; [ =x s4=
if (queue[k]>queue[j]) file://不用交换 FOwDp0
break; w=h1pwY
SortUtil.swap(queue,j,k); f~OU*P>V@
k = j; 7?gFy-
} 3cS2gxF
} {j{+0V
private void fixUp(int k) { Rd7_~.Bo
while (k > 1) { d%I"/8-J
int j = k >> 1; C9DJO:f.2y
if (queue[j]>queue[k]) m@`8A
break; ,B&fFis
SortUtil.swap(queue,j,k); I\?9+3 XnQ
k = j; . #Z+Z
} kc'pN&]r:
} X0;4_,=
H xV#WoYKj
} !|q<E0@w\
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} YJS{i
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SortUtil： 1pv}]&X
o~FRF0f*VP
package org.rut.util.algorithm; 49Df?sx
MaBYk?TR~
import org.rut.util.algorithm.support.BubbleSort; GT hL/M
import org.rut.util.algorithm.support.HeapSort; /:6Wzj
import org.rut.util.algorithm.support.ImprovedMergeSort; C.^Ven
import org.rut.util.algorithm.support.ImprovedQuickSort; +t4BQf
import org.rut.util.algorithm.support.InsertSort; {k.MS-q
import org.rut.util.algorithm.support.MergeSort; 2-zT$`[]J
import org.rut.util.algorithm.support.QuickSort; V]c;^
import org.rut.util.algorithm.support.SelectionSort; KD1=Y80P
import org.rut.util.algorithm.support.ShellSort; =ItkFjhBc
z)XRx:YU;$
/** b5IA"w
* @author treeroot =&0wr6
* @since 2006-2-2 Bx"7%[
* @version 1.0 t#nn@Yf
*/ ]nQt>R p_
public class SortUtil { r!P}u
public final static int INSERT = 1; 2>-S-;i
public final static int BUBBLE = 2; o47r<>t
public final static int SELECTION = 3; RO0>I8c1c
public final static int SHELL = 4; 3Y)PU=
public final static int QUICK = 5; S0g'r !;6
public final static int IMPROVED_QUICK = 6; aw?=hXR!
public final static int MERGE = 7; =z{JgD/
public final static int IMPROVED_MERGE = 8; +5.t. d
public final static int HEAP = 9; ri C[lB
E|YdcS
public static void sort(int[] data) { ]Mj/&b>"e
sort(data, IMPROVED_QUICK); Sp}D;7
} vhvdKD
private static String[] name={ vQF vtwd
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" GEjd7s]C
}; VKm!Ri$
FVv8--
private static Sort[] impl=new Sort[]{ !|2VWI}
new InsertSort(), .t&R>9cZ^
new BubbleSort(), Mfk2mIy
new SelectionSort(), (3[z%@I
new ShellSort(), 7@.cOB`y@3
new QuickSort(), 1[*UYcD
new ImprovedQuickSort(), *'"T$ib
new MergeSort(), Nf3.\eR
new ImprovedMergeSort(), Bb&^{7
new HeapSort() #QvMVy
}; ,U*)2`[
a</D_66
public static String toString(int algorithm){ ?Y:x[pOe
return name[algorithm-1]; ;)Kh;;e
} &`Y!;@K9W#
xX0-]Y h:
public static void sort(int[] data, int algorithm) { Cp^@zw*/
impl[algorithm-1].sort(data); d"G+8}.4
} <J(sR
h0?2j)X_
public static interface Sort { jNwjK0?
public void sort(int[] data); 41#w|L \
} V&soN:HS
.%'(9E
public static void swap(int[] data, int i, int j) { ES<1tG
int temp = data; GN#<yv$av
data = data[j]; "I;C;}!
data[j] = temp; o01kYBD
} Mcw4!{l`
} n[Zz]IO,g