[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; AxiCpAS;J
} mO@Sl(9
int i1=l; ;s w3MRJ
int i2=mid+1; 1zIrU6H2;_
for(int cur=l;cur<=r;cur++){ %P`|kPW1
if(i1==mid+1) f4+}k GJN
data[cur]=temp[i2++]; vU!<-T#
else if(i2>r) Vv.q{fRvYB
data[cur]=temp[i1++]; "/zDcZbL;
else if(temp[i1] data[cur]=temp[i1++]; FSyeDC^@
else E>NL/[1d
data[cur]=temp[i2++]; --g?`4
} G-G\l?R(
} )Zit6I
ziG]BZ
} G/?j$T
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改进后的归并排序: d<>jhp5el
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package org.rut.util.algorithm.support; zHt}`>y&
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import org.rut.util.algorithm.SortUtil; Jk=d5B
Jkub|w#QH
/** \t+q1S1
* @author treeroot !_LRuqQ?"
* @since 2006-2-2 M{M?#Q
* @version 1.0 a3(q;^v
*/ D>I|(B!.p8
public class ImprovedMergeSort implements SortUtil.Sort { 7Hp~:i30
XjV,wsZ=
private static final int THRESHOLD = 10; U\`H0'
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/* 2ZZF hj
* (non-Javadoc) cT,5xp"a
* /b~|(g31"
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) xN]88L}Tn
*/ zFGZ;?i
public void sort(int[] data) { F` gQ[
int[] temp=new int[data.length]; Q]2v]PJ6"
mergeSort(data,temp,0,data.length-1); .~fAcc{Qj
} Q.]RYv}\
/?Fa<{
private void mergeSort(int[] data, int[] temp, int l, int r) { .j_YVYu1&
int i, j, k; Dt p\T|)
int mid = (l + r) / 2; JYU0&nZl4
if (l == r) I%fz^:[#<
return; -jOCzp
if ((mid - l) >= THRESHOLD) STH?X] /
mergeSort(data, temp, l, mid); @I$;
else h(VF
insertSort(data, l, mid - l + 1); d)7V:
if ((r - mid) > THRESHOLD) ><Z`)}f
mergeSort(data, temp, mid + 1, r); +r 2\v
else *K1GX
insertSort(data, mid + 1, r - mid); (0/)vZc
y 2v69nu~q
for (i = l; i <= mid; i++) { #aV2+`d
temp = data; Q #%C)7)
} dJ0qg_ U&
for (j = 1; j <= r - mid; j++) { umD[4aP~;
temp[r - j + 1] = data[j + mid]; zxt&oT0Q
} :Sj r
int a = temp[l]; [rt+KA
int b = temp[r]; v<qiu>sbz}
for (i = l, j = r, k = l; k <= r; k++) { jS,zdJs=
if (a < b) { ^,.G<2Kx&
data[k] = temp[i++]; DlXthRM
a = temp; D9|?1+Kc
} else { ADa'(#+6
data[k] = temp[j--]; 0$9I.%4jAJ
b = temp[j]; Tpv]c
} uJP9J U
} oqOXRUy
} xgeKz^,
t,2Q~ied=
/** #iot.alNA
* @param data +I+7@XiZ
* @param l 1JU1XQi
* @param i }m~2[5q%/
*/ |H)WJ/`
private void insertSort(int[] data, int start, int len) { LK^t](F
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); n./onv
} cQaEh1n
} ]qJ6#sAw75
} nFn@Z'T$N
} \gE3wmSJ,
kS$HIOt823
堆排序： =m4_8)-8u
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package org.rut.util.algorithm.support; OudD1( )W
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import org.rut.util.algorithm.SortUtil; 'S f
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/** 3huTT"G
* @author treeroot 3f{%IU(z
* @since 2006-2-2 ZcXqH7`r
* @version 1.0 FshQ OFW
*/ od- 0wJN-m
public class HeapSort implements SortUtil.Sort{ c0Tda
XB &-k<C
/* (non-Javadoc) T~k5` ~\(
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 8u::f`vi
*/ }{^i*T5rl
public void sort(int[] data) { |4i,Vkfhe
MaxHeap h=new MaxHeap(); :v k+[PzJ
h.init(data); &/7AW(?
for(int i=0;i h.remove(); '\:?FQ C
System.arraycopy(h.queue,1,data,0,data.length); Fc;)p88[
} ;X u&['
saH +C@_,
private static class MaxHeap{ /tno`su;
a#=GLB_P(
void init(int[] data){ Kfc(GL?
this.queue=new int[data.length+1]; {PHxm
for(int i=0;i queue[++size]=data; ~BVg#_P
fixUp(size); |52VHW8c
} Llf>C,)
} ~e[)]b3
%D z|p]49!
private int size=0; S:] w@$
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private int[] queue; %@U<|9 %ua
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public int get() { P%smX`v
return queue[1]; 5I{YsM
} (jCE&'?}
=o=)EU{~
public void remove() { \O?#gW\tR
SortUtil.swap(queue,1,size--); 8oY0?|_Bx
fixDown(1); WKpHb:H
} Z{RgpVt
file://fixdown 7,|-%!p[
private void fixDown(int k) { yPm)r2Ck
int j; cGC&O%`i,\
while ((j = k << 1) <= size) { &%J{C3Q9
if (j < size %26amp;%26amp; queue[j] j++; 1K,bmb xRt
if (queue[k]>queue[j]) file://不用交换 NF0} eom
break; FFtj5e
SortUtil.swap(queue,j,k); =#1iio&
k = j; Cs%'Af
} 1O9V Ej5
} lbg!B4,
private void fixUp(int k) { CN: 36
while (k > 1) { eUqsvF}l!
int j = k >> 1; Kd;|Z
if (queue[j]>queue[k]) LPT5d 7K@
break; z-(dT
SortUtil.swap(queue,j,k); ep[7#\}5
k = j; =g/K>B
} f?[y-
} Tb}`]Y`X
yYWGM
} IcPIOCmOc
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} ykl./uY'
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SortUtil： sh}=#eb
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package org.rut.util.algorithm; ,/:#=TuYm
}RDhI1x[mk
import org.rut.util.algorithm.support.BubbleSort; 3j<] W
import org.rut.util.algorithm.support.HeapSort; $CHri|
import org.rut.util.algorithm.support.ImprovedMergeSort; qN+ngk,:
import org.rut.util.algorithm.support.ImprovedQuickSort; GIo&zPx
import org.rut.util.algorithm.support.InsertSort; %S.R@C[3
import org.rut.util.algorithm.support.MergeSort; yZ6560(q
import org.rut.util.algorithm.support.QuickSort; ;2)@NH
import org.rut.util.algorithm.support.SelectionSort; -UPdgZ_Vxz
import org.rut.util.algorithm.support.ShellSort; 8K6yqc H
bPOehvK/
/** N$>g)Ml?
* @author treeroot *"O7ml]
* @since 2006-2-2 mWUQF"q8
* @version 1.0 *Yl9%x]3c
*/ 6/.-V1*O
public class SortUtil { vy1:>N?#5
public final static int INSERT = 1; hUB_[#8#
public final static int BUBBLE = 2; 8WZM}3x$f{
public final static int SELECTION = 3; bb+-R_3Kd
public final static int SHELL = 4; %@kmuz??
public final static int QUICK = 5; z~L(kf4
public final static int IMPROVED_QUICK = 6; ggJn oL
public final static int MERGE = 7; +<|6y46
public final static int IMPROVED_MERGE = 8; sR+=<u1
public final static int HEAP = 9; t_x\&+W
j5G8IP_Wx
public static void sort(int[] data) { Ngi$y>{Sq
sort(data, IMPROVED_QUICK); d*3k]Ie%5f
} HPg@yx"U
private static String[] name={ B;2os^*
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" @iS(P u
}; oOmPbAY
q*mNVBy
private static Sort[] impl=new Sort[]{ }O<=!^Y;A
new InsertSort(), sD_Z`1
new BubbleSort(), yO]Vex5)
new SelectionSort(), =UM30 P/
new ShellSort(), MU<Y,4/k
new QuickSort(), 7^ITedW@
new ImprovedQuickSort(), M0S}-eXc5
new MergeSort(), B'lWs;
new ImprovedMergeSort(), ;Bat!K7W
new HeapSort() ,<d[5;7x
}; =^|^"b
V&eti2&zO
public static String toString(int algorithm){ u-qg9qXJb
return name[algorithm-1]; ic%<39
} 0gL]^_+7
l|/h4BJ'
public static void sort(int[] data, int algorithm) { ^}8(o
impl[algorithm-1].sort(data); m$NBGw
} |ITp$_S
\|F4@
public static interface Sort { q?nXhUD
public void sort(int[] data); [}9sq+##
} E!8FZv8
9gZMfP
public static void swap(int[] data, int i, int j) { C\ZL*,%}
int temp = data; GLp2 ?fon
data = data[j]; aEo!yea
data[j] = temp; AE={P*g
} c*-8h{}
} 6iVjAxR