[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; th;]Vo
} a\|X^%2g
int i1=l; GYTbeY
int i2=mid+1; yO%VzjJhg
for(int cur=l;cur<=r;cur++){ [/n'@cjNZ
if(i1==mid+1) @~Rk^/0
data[cur]=temp[i2++]; UvoG<;
else if(i2>r) K oL%}u&
data[cur]=temp[i1++]; nFSG<#x\
else if(temp[i1] data[cur]=temp[i1++]; !DCVoc]pV
else O/'f$Zj36
data[cur]=temp[i2++]; X]>[Qz)K^
} Oym]&SrbS
} eq7C]i rH
7E@$}&E
} jR}*bIzv
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改进后的归并排序: Z7ZWf'o
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package org.rut.util.algorithm.support; 3<yCe%I:
8VKb*
import org.rut.util.algorithm.SortUtil; XWJ0=t&}
t/_\U=i$
/** jAsh
* @author treeroot t4*aVHT
* @since 2006-2-2 qsQ]M^@>
* @version 1.0 UEk|8yq
*/ GXGN;,7EV
public class ImprovedMergeSort implements SortUtil.Sort { &FT5w T
zV9 =
private static final int THRESHOLD = 10; pvK \fSr
vWZ>Hf]`L
/* &n,xGIG
* (non-Javadoc) 9G=A)j
* dpl"}+
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) gogl[gHO
*/ n/,rn>k7:
public void sort(int[] data) { N GX-'w
int[] temp=new int[data.length]; #h}IUR
mergeSort(data,temp,0,data.length-1); >c~9wv
} $u(M 4(}
$NH`Iu9t
private void mergeSort(int[] data, int[] temp, int l, int r) { [0( E>vm
int i, j, k; je$R\7B<
int mid = (l + r) / 2; c9>8IW
if (l == r) C"V?yDy2~
return; w%!k?t,*]
if ((mid - l) >= THRESHOLD) [U_Q 2<H
mergeSort(data, temp, l, mid); aH~x7N6!
else !IQfeoT
insertSort(data, l, mid - l + 1); l#<}|b
if ((r - mid) > THRESHOLD) rVc zO+E
mergeSort(data, temp, mid + 1, r); S:"z<O
else 3:z4M9f
insertSort(data, mid + 1, r - mid); y"%iD`{
<%5-Pzp
for (i = l; i <= mid; i++) { g6k&c"%IQ(
temp = data; Es ZnGuY
} 8=u+BDG
for (j = 1; j <= r - mid; j++) { bHlDm~5
temp[r - j + 1] = data[j + mid]; 7J</7\
} 3e!a>Gl*
int a = temp[l]; &,6y(-
int b = temp[r]; R-0_226
for (i = l, j = r, k = l; k <= r; k++) { J_((o
if (a < b) { u:qD*zOq
data[k] = temp[i++]; K[3D{=
a = temp; o 0cc+
} else { c=U$$|qHV
data[k] = temp[j--]; .,BD DPFB
b = temp[j]; /^es0$Co.
} !<UEq`2
} xSMp[j
} :w&)XI34
p.W*j^';Q
/** osgS?=8
* @param data 0;m$a=
* @param l GwIfGixqH
* @param i [?K\%]
*/ %NAFU/&
private void insertSort(int[] data, int start, int len) { =-s20mdj
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); Eg-Mm4o
} &j~|3
} wDC/w[4:
} )su <Ji*
} { ves@p>?
%(7wZ0Z
堆排序： =='{[[J
h/+I-],RF
package org.rut.util.algorithm.support; +hvIJv ?
nAba =iW
import org.rut.util.algorithm.SortUtil; {-7yZ]OO$
FsPDWy&x
/** $rQFM[
* @author treeroot gp&& c,
* @since 2006-2-2 j7HlvoZV
* @version 1.0 6+f>XL#w
*/ EwBN+v;)
public class HeapSort implements SortUtil.Sort{ &#my #u^O;
cPBy(5^
/* (non-Javadoc) elHarey`f
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) ^@5ui;JV
*/ )D-.7m.v]
public void sort(int[] data) { i7!mMO8]
MaxHeap h=new MaxHeap(); Y" +1,?yH
h.init(data); Z6/~2S@
for(int i=0;i h.remove(); kpreTeA]
System.arraycopy(h.queue,1,data,0,data.length); U.j\u>a
} 6UAxl3-\
}ok nB
private static class MaxHeap{ !m:PBl5
SoGLsO+R
void init(int[] data){ _x|8U'|Ce
this.queue=new int[data.length+1]; jl0Eg
for(int i=0;i queue[++size]=data; hz|z&vyP
fixUp(size); 96E7hp !:
} 3%4Mq6Q`
} T]Td4T!
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private int size=0; W]Y!ZfGnN
?9okjLp1n
private int[] queue; 9n\#s~,
h+u|MdOY\
public int get() { e4H0<h }{
return queue[1]; #V,~d&_k
} Olh%"=*;
Ty|c@X
public void remove() { 1Y"qQp
SortUtil.swap(queue,1,size--); Py0i%pZ
fixDown(1); eV=sDx
} WuZn|j'
file://fixdown T:~W.3
private void fixDown(int k) { bme#G{[)Y
int j; _$_CR\$
while ((j = k << 1) <= size) { HPCA$LD
if (j < size %26amp;%26amp; queue[j] j++; 5*za]
if (queue[k]>queue[j]) file://不用交换 4^}PnU7z
break; UT7lj wT
SortUtil.swap(queue,j,k); QNa3S*
k = j; &r%^wfp
} ;|1P1H-W~M
} kL2sJX+
private void fixUp(int k) { MCpK^7]k
while (k > 1) { lc(iy:z@
int j = k >> 1; rL/7wa
if (queue[j]>queue[k]) $ rnr;V
break; 3evfX[V#
SortUtil.swap(queue,j,k); >mSl~.I2
k = j; qc"/T16M]
} c0p=/*s(
} `;2`H, G'
0nnq/u^
} @<JQn^M
!7*/lG
} RtQfE+
boB{Y7gO4
SortUtil： zb)SlR
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package org.rut.util.algorithm; /`@>v$oo
<"%h1{V
import org.rut.util.algorithm.support.BubbleSort; z{WqICnb
import org.rut.util.algorithm.support.HeapSort; A8Y~^wn
import org.rut.util.algorithm.support.ImprovedMergeSort; tV4aUve
import org.rut.util.algorithm.support.ImprovedQuickSort; {moNtzE;
import org.rut.util.algorithm.support.InsertSort; &g>+tkC
import org.rut.util.algorithm.support.MergeSort; l(4./M
import org.rut.util.algorithm.support.QuickSort; <L#r6y~H
import org.rut.util.algorithm.support.SelectionSort; S6Pb V}
import org.rut.util.algorithm.support.ShellSort; v]S8!wU
zz*[JIe
/** g<3>7&^
* @author treeroot zKT<QM!`
* @since 2006-2-2 xWV7#Z7
* @version 1.0 K6hNN$F!
*/ Nuq/_x
public class SortUtil { t4uxon
public final static int INSERT = 1; `d#_66TLr
public final static int BUBBLE = 2; `"4EE}eQc
public final static int SELECTION = 3; w Vmy`OV/
public final static int SHELL = 4; 2 G{KpM&
public final static int QUICK = 5; ghiElsBU
public final static int IMPROVED_QUICK = 6; U++UG5c
public final static int MERGE = 7; FM];+d0
public final static int IMPROVED_MERGE = 8; `rQl{$9IC
public final static int HEAP = 9; }"tYb6*
+R$KEGu~0Y
public static void sort(int[] data) { YdaJ&
sort(data, IMPROVED_QUICK); Y [S^&pF
} YgDasKFm'
private static String[] name={ '5\1uB PKW
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" VvKH]>*
}; VUy 1?n
f#mpd]e+6
private static Sort[] impl=new Sort[]{ 1XRVbQt
new InsertSort(), en)DN3
new BubbleSort(), :{2$X|f 3
new SelectionSort(), Gx)D~7lz
new ShellSort(), 24fWj?A|^
new QuickSort(), D%v yO_k
new ImprovedQuickSort(), 4F?1,-X
new MergeSort(), ;k]pq4E
new ImprovedMergeSort(), hRu%> =7
new HeapSort() +0DIN4Y(4
}; 50A_+f.7%
uv!/DX#
public static String toString(int algorithm){ t60m:k4J
return name[algorithm-1]; ]gZjV
} %iv'/B8
lLv0lf
public static void sort(int[] data, int algorithm) { gu!A:Q
impl[algorithm-1].sort(data); B^{DCHu/
} }2S \-
`Ii>wb
public static interface Sort { XA68H!I
public void sort(int[] data); 5YasD6l
} l{4\Wn Va
/e\dsC{uJ
public static void swap(int[] data, int i, int j) { I$&/?ns@O
int temp = data; !p$V7pFu6
data = data[j]; 2_Qzc&"[ 4
data[j] = temp; <4Fd~
} yLP0w^Q
} jWz-7BO