[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; L2"fO
} 1.7tXjRd+
int i1=l; :',.I
int i2=mid+1; \@yx;}bdI
for(int cur=l;cur<=r;cur++){ 2-G he3
if(i1==mid+1) _N`:NOM
data[cur]=temp[i2++]; :Ny.OA
else if(i2>r) *5( h,s3&
data[cur]=temp[i1++]; /mMRV:pd
else if(temp[i1] data[cur]=temp[i1++]; N[$bP)h7
else 5LVhq[}mP
data[cur]=temp[i2++]; d*7nz=0&$
} L<HJ!
} S\7-u\)
r>fx55dw
} XA8{N
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改进后的归并排序: $JKR,
.~#<>
package org.rut.util.algorithm.support; rLMjN#`^
<DG=qP6O
import org.rut.util.algorithm.SortUtil; d\FBY&C7b
F:"CaDk
/** YE<_a;yh1
* @author treeroot V!!E)I
* @since 2006-2-2 J}?F4
* @version 1.0 *P4G}9B|9:
*/ I@dS/
public class ImprovedMergeSort implements SortUtil.Sort { nic7RN?F<
ka_]s:>+
private static final int THRESHOLD = 10; )6?(K"T
a]NQlsE}l
/* dZnAdlJ
* (non-Javadoc) m/#)B6@A
* A%H"a+
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) ICSi<V[y1
*/ $$E!u}
public void sort(int[] data) { 2{!o"6t
int[] temp=new int[data.length]; [t^Z2a{
mergeSort(data,temp,0,data.length-1); Kk?P89=*
} ia.95H;
"S6'<~s
private void mergeSort(int[] data, int[] temp, int l, int r) { ]Lg$p
int i, j, k; N?`-$C ]
int mid = (l + r) / 2; CRy;>UI
if (l == r) r+8%oWj
return; r5ONAa3.
if ((mid - l) >= THRESHOLD) [}snKogp
mergeSort(data, temp, l, mid); ;>?NH6B,
else ;m/%g{oV
insertSort(data, l, mid - l + 1); #R&Dgt
if ((r - mid) > THRESHOLD) 5&5 x[S8
mergeSort(data, temp, mid + 1, r); l4c9.'6
else ur\v[k=
insertSort(data, mid + 1, r - mid); Sp+ zP-3
;q:.&dak1
for (i = l; i <= mid; i++) { HorFQ?8
temp = data; C[h"w'A2
} (<f`}, QxD
for (j = 1; j <= r - mid; j++) { Y`@:L'j
temp[r - j + 1] = data[j + mid]; <u\j4<p
} BbA7X
int a = temp[l]; B4k~~;|
int b = temp[r]; `9;:mR $
for (i = l, j = r, k = l; k <= r; k++) { ^6=y4t=%F
if (a < b) { 1`1U'ibhe
data[k] = temp[i++]; H.sHXuu
a = temp; JTuU}nm+
} else { {"<D$*K~
data[k] = temp[j--]; vu^ '+ky
b = temp[j]; 9pN},F91n:
} `]L&2RS
} 69)- )en
} 8c-r;DE
<Wgp$qt;
/** $5XE'm
* @param data >3R)&N
* @param l 2y6 e]D
* @param i 0pT?qsM2
*/ ^J,Zl`N
private void insertSort(int[] data, int start, int len) { Kj|l]'
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); g9 .b6}w!
} )H&rr(
} d(u"^NH;
} k&-SB -
} #'}?.m
Zo}O,;(F5
堆排序： .W_'6Q+
KiN8N=z
package org.rut.util.algorithm.support; ^8p=g-U\
qV^Z@N+,
import org.rut.util.algorithm.SortUtil; E/MD]ox
d{?X:*F
/** LF\4>(C2g
* @author treeroot F91'5D,u0
* @since 2006-2-2 tOx)t$ix
* @version 1.0 V=%j]`Os
*/ n&V\s0
public class HeapSort implements SortUtil.Sort{ _tJp@\rOz=
kWVaHZr
/* (non-Javadoc) R pUq#Y:a
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 5>{S^i~!
*/ 4-RzWSFbo`
public void sort(int[] data) { @J"Gn-f~
MaxHeap h=new MaxHeap(); L4bx [
h.init(data); 9V5}%4k%+
for(int i=0;i h.remove(); i7hWBd4wK
System.arraycopy(h.queue,1,data,0,data.length); qx,>j4yw
} j9FG)0
?7Kl)p3
private static class MaxHeap{ I"TFj$Pg
Fk01j;k.H
void init(int[] data){ 49vKb(bz{
this.queue=new int[data.length+1]; `acX1YWh5
for(int i=0;i queue[++size]=data; 7[=MgnmuC
fixUp(size); jQDXl
} .xnJT2uu'
} ]3B8D<p
L\1&$|?
private int size=0; u-yVc*<,
R(jp
private int[] queue; b^WTX
Bf {h\>q
public int get() { q~QB?+ x&
return queue[1]; xaQO=[
} 0E[&:6#Y
3aL8GMiu
public void remove() { WCf?_\cG
SortUtil.swap(queue,1,size--); (^x ,
fixDown(1); /l o;:)AiP
} ?)x"+[2
file://fixdown )YSS>V
private void fixDown(int k) { ;[pY>VJ(
int j; b#XY.+ *0
while ((j = k << 1) <= size) { WX@a2c.'
if (j < size %26amp;%26amp; queue[j] j++; N@Fof(T&
if (queue[k]>queue[j]) file://不用交换 -_<rmR[:]
break; qX,TX 3
SortUtil.swap(queue,j,k); l_Eeus
k = j; (MfPu8j
} O7&6]/`
} B.O &KRo
private void fixUp(int k) { W|NT*g{;M
while (k > 1) { a!iG;:K
int j = k >> 1; AXK6AZjX
if (queue[j]>queue[k]) 7RE'KH_$
break; IdP"]Sv{<
SortUtil.swap(queue,j,k); QQ1|]/)
k = j; J.%%]-f=&
} zTP|H5HyK
} h^Bp^V5#
(c^ZFh2]
} >fX_zowX
9Tju+KcK
} /EW1&
CFo>D\*J
SortUtil： nIWZo ~
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package org.rut.util.algorithm; [^rMM1^,OB
(P=q&]l[
import org.rut.util.algorithm.support.BubbleSort; h5+L/8+J^z
import org.rut.util.algorithm.support.HeapSort; ()Cw;N{E
import org.rut.util.algorithm.support.ImprovedMergeSort; v'fX'/
import org.rut.util.algorithm.support.ImprovedQuickSort; Dht,!LVb;
import org.rut.util.algorithm.support.InsertSort; `dp]N0nz
import org.rut.util.algorithm.support.MergeSort; YwYCXFQ|
import org.rut.util.algorithm.support.QuickSort; \%=GM J^[p
import org.rut.util.algorithm.support.SelectionSort; y5oC|v7
import org.rut.util.algorithm.support.ShellSort; d :(&q
x'OYJ>l|
/** d5 U?*
* @author treeroot T~&9/%$F
* @since 2006-2-2 AEUXdMo
* @version 1.0 OE{PP9eh
*/ Vdpvo;4uy
public class SortUtil { `Z)]mH\X
public final static int INSERT = 1; ,lsoxl
public final static int BUBBLE = 2; /*$B
public final static int SELECTION = 3; oM<Y o%n
public final static int SHELL = 4; )p?p39>h
public final static int QUICK = 5; &_1Ivaen6
public final static int IMPROVED_QUICK = 6; e#R'_}\yj
public final static int MERGE = 7; ]ULE>a
public final static int IMPROVED_MERGE = 8; T/9`VB%N
public final static int HEAP = 9; O4l]Q
G]NnGL<xk
public static void sort(int[] data) { sTmY'5ry
sort(data, IMPROVED_QUICK); /E%r@Rui3$
} 948lL&
private static String[] name={ K |Z]
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" :4HZ>!i
}; KMU2PoqD
;XUiV$
private static Sort[] impl=new Sort[]{ e7# B?
new InsertSort(), X3# AYn,
new BubbleSort(), G/y@`A)
new SelectionSort(), Y\Grf$e
new ShellSort(), -n>JlfCd2
new QuickSort(), B'@a36
new ImprovedQuickSort(), {Xj2c]A1
new MergeSort(), EKr#i}(x<
new ImprovedMergeSort(), FF}A_ZFY
new HeapSort() q-k~L\Ys
}; CLn}BxgD
K0YUN^St
public static String toString(int algorithm){ +f+#W
return name[algorithm-1]; 7UVhyrl
} #<4/ *< 5
&a/F"?9jL
public static void sort(int[] data, int algorithm) { 9hNHcl.
impl[algorithm-1].sort(data); D on8xk
} >sfH[b
BS(XEmJn&j
public static interface Sort { @xBw'
public void sort(int[] data); M~o\K'
} 'K8emt$d+
C{5^UCJkg
public static void swap(int[] data, int i, int j) { $h)VKW^\
int temp = data; 2u=Nb0
data = data[j]; @a[Y[FS
data[j] = temp; 0/g 0=dW=
} )"]Nf6
} c^%vyBMY