[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; xsFWF*HPs
} EW4XFP4 c
int i1=l; kozg8 `\]
int i2=mid+1; hBE}?J>
for(int cur=l;cur<=r;cur++){ z6G^BaT'
if(i1==mid+1) u3,b,p
data[cur]=temp[i2++]; -r-`T s
else if(i2>r) 8XJ%Yuu
data[cur]=temp[i1++]; i%*x7zjY{
else if(temp[i1] data[cur]=temp[i1++]; SsznV}{^
else H[,.nH_>+
data[cur]=temp[i2++]; V6$v@Zq
} JpDYB
} &9s6p6eb
E7_^RWG
} m; ABHq#
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改进后的归并排序: q]Qgg
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package org.rut.util.algorithm.support; cR5<.$aY
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import org.rut.util.algorithm.SortUtil; Wt3\&.n
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/** ,XA;S5FE
* @author treeroot C#-x 3d-{
* @since 2006-2-2 wqGZkFg1
* @version 1.0 II<<-Y6
*/ XbH X,W$h
public class ImprovedMergeSort implements SortUtil.Sort { Y*}Sq|y
A:NY:#uC
private static final int THRESHOLD = 10; WJ.PPq>]F
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/* D!mhR?t
* (non-Javadoc) THua?,oyW
* bm+ Mr
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) QHM39Eu]
*/ -%N (X8
public void sort(int[] data) { cn\_;TYiJ
int[] temp=new int[data.length]; 1OGlD+f
mergeSort(data,temp,0,data.length-1); ~0}eNz*
} u51/B:+
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private void mergeSort(int[] data, int[] temp, int l, int r) { q@!:<Ra,){
int i, j, k; { &qBr&kg
int mid = (l + r) / 2; u3ZG;ykM
if (l == r) Sph+kiy|
return; Qxvz}r.l]
if ((mid - l) >= THRESHOLD) o&AUB`.9~
mergeSort(data, temp, l, mid); r"Bf@va
else 95<:-?4C;W
insertSort(data, l, mid - l + 1); d}=p-s.GA
if ((r - mid) > THRESHOLD) drZw#b
mergeSort(data, temp, mid + 1, r); vK{K#{
else ~8X'p6
insertSort(data, mid + 1, r - mid); }"8_$VDcz
M`<D Z<:<
for (i = l; i <= mid; i++) { j>T''Tf
temp = data; #X8[g_d/
} ~9c9@!RA2
for (j = 1; j <= r - mid; j++) { D[r
temp[r - j + 1] = data[j + mid]; s_[?(Ip{
} `WB|h)Y
int a = temp[l]; Vg+SXq6G
int b = temp[r]; M,@SUu v"
for (i = l, j = r, k = l; k <= r; k++) { l}^#kHSyd
if (a < b) { ,J^Op
data[k] = temp[i++]; 4{?x(~
a = temp; xr/k.Fz
} else { Q.\>+4]1&&
data[k] = temp[j--]; }';&0p2Z
b = temp[j]; r&[~/m8zl
} }rE|\p>
} pUr[MnQLf
} f+6l0@K2
t>fB@xHBB
/** hF~B&^dd.
* @param data Cg Sdyg@
* @param l .T|NB8 rS
* @param i @\y7 9FX
*/ z!+<m<
private void insertSort(int[] data, int start, int len) { MUrY>FYgx
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); Mb>XM7}PU
} f#~Re:7.c
} 7N"Bbl
} WI6E3,ejB1
} _iu|*h1y
DR /)hAE
堆排序： qM0MSwvC=
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package org.rut.util.algorithm.support; Ic K=E]p
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import org.rut.util.algorithm.SortUtil; SDIeq
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/** }gW/heUE
* @author treeroot ".%LBs~$
* @since 2006-2-2 lt4jnV2"a
* @version 1.0 /aG>we
*/ 0EOX@;}
public class HeapSort implements SortUtil.Sort{ _6!/}Fm
(;&?B.<\:
/* (non-Javadoc) <o+ 7U
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) p2vBj.*J
*/ :dN35Y]a
public void sort(int[] data) { Ye2];(M
MaxHeap h=new MaxHeap(); :XSc#H4
h.init(data); 1H=wl=K
for(int i=0;i h.remove(); Db=>7@h3C
System.arraycopy(h.queue,1,data,0,data.length); 49oW 'j
} sjI[Vq
Q!X_&ao)O
private static class MaxHeap{ ]B3FTqR{i
t`T\d\
void init(int[] data){ 15o.j!S
this.queue=new int[data.length+1]; I#t9aR+&
for(int i=0;i queue[++size]=data; H?j-=Zka
fixUp(size); 9>3Ltnn0
} U;{,lS2l
} =t$mbI
SU O;
private int size=0; `u~
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private int[] queue; `B\KS*Gya#
o U}t'WU
public int get() { V-;nj,.mY
return queue[1]; (4ci=*3=
} J(0=~Z[
a^c,=X3
public void remove() { N~5WA3xd
SortUtil.swap(queue,1,size--); :F>L;mp
fixDown(1); s.;KVy,=Bu
} G^rh*cb K
file://fixdown l~4e2xoT
private void fixDown(int k) { [gkRXP[DGs
int j; 5Vnr"d
while ((j = k << 1) <= size) { +<\cd9
if (j < size %26amp;%26amp; queue[j] j++; RA/ =w&
if (queue[k]>queue[j]) file://不用交换 8U<.16+5Q
break; mXU?+G0
SortUtil.swap(queue,j,k); aI{@]hCo
k = j; KPjqw{gR_R
} wGzXp5 dl
} e0N=2i?I#z
private void fixUp(int k) { #4_O;]{'
while (k > 1) { nUud?F^_
int j = k >> 1; .l( r8qY#
if (queue[j]>queue[k]) K~Au?\{
break; O3C)N I\i
SortUtil.swap(queue,j,k); t6bWSz0
k = j; ! jX+ox
} nhP~jJn
} I"Q9W|J_&
ccN&h
} /cL9?k;o
bpF@}#fT
} 86[RH!e
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SortUtil： 2>MP:yY;K
;sL6#Go?V
package org.rut.util.algorithm; QVSsi j
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import org.rut.util.algorithm.support.BubbleSort; 8g# Y
import org.rut.util.algorithm.support.HeapSort; v[,v{5b
import org.rut.util.algorithm.support.ImprovedMergeSort; >^T,U0T])
import org.rut.util.algorithm.support.ImprovedQuickSort; |P. =
import org.rut.util.algorithm.support.InsertSort; n$hqNsM
import org.rut.util.algorithm.support.MergeSort; t)oES>W1
import org.rut.util.algorithm.support.QuickSort; k\Z;Cmh>
import org.rut.util.algorithm.support.SelectionSort; yA!3XUi
import org.rut.util.algorithm.support.ShellSort; 0K$WSGB?6j
3d#9Wyxs
/** ^i`3cCFB<
* @author treeroot SA`J.4yn
* @since 2006-2-2 'TK$ndy;7}
* @version 1.0 f>s#Ngvc
*/ [L*[j.r7[
public class SortUtil { c69U1
public final static int INSERT = 1; $LxG>db
public final static int BUBBLE = 2; n~"g'Y
public final static int SELECTION = 3; K4?t' dd]
public final static int SHELL = 4; YYTO,4
public final static int QUICK = 5; XoDJzrL#
public final static int IMPROVED_QUICK = 6; .Lr`j8
public final static int MERGE = 7; GIl:3iB49
public final static int IMPROVED_MERGE = 8; 68vxI|EZ
public final static int HEAP = 9; ggrI>vaw
&FL%H;Kfx
public static void sort(int[] data) { #Y;.>mF
sort(data, IMPROVED_QUICK); I?f"<5[0
} CMC?R,d
private static String[] name={ GYFgEg}
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" vg+r?4Q3
}; 5|yZEwq
V[#6yMU@
private static Sort[] impl=new Sort[]{ 8lMZ
new InsertSort(), I'x$,s
new BubbleSort(), ]a78tTi
new SelectionSort(), ~wfoK7T}
new ShellSort(), c}YJqhk0J
new QuickSort(), {]+ jL1
new ImprovedQuickSort(), R|/Wz/$1A
new MergeSort(), V78Mq:7d
new ImprovedMergeSort(), {\P?/U6~f
new HeapSort() lTn;3'
}; _Mlhumt
RI?NB6U
public static String toString(int algorithm){ ]a8eDy
return name[algorithm-1]; wUbmzP.
} .8-PB*vb
<inl{CX/
public static void sort(int[] data, int algorithm) { ,xYg
impl[algorithm-1].sort(data); P~&O4['<
} baqn7k"
mG X\wta
public static interface Sort { &Y 'z?N
public void sort(int[] data); wtlB
} 'zE: fLo
Xz8$Xz,O
public static void swap(int[] data, int i, int j) { L%f-L.9`u
int temp = data; S<*';{5~
data = data[j]; I`lDWL
data[j] = temp; O)l%OOv
} &/HoSj>HS
} W^wd ([