[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; PMfW;%I.
} 4yyw:"
int i1=l; $-}&RW9
int i2=mid+1; %T({;/
for(int cur=l;cur<=r;cur++){ Sc7 Ftb%
if(i1==mid+1) >Uw:cq
data[cur]=temp[i2++]; )0VL$A
else if(i2>r) jE*{^+n
data[cur]=temp[i1++]; 7*l$i/!
else if(temp[i1] data[cur]=temp[i1++]; z`zz8hK.
else geme_
data[cur]=temp[i2++]; eFG/!b<17
} 3`bQ0-D;
} fpR|+`k
z`wIb
} Zw]"p63eMa
l7|z]v-
改进后的归并排序: wZ(1\ M(
fz(YP=@ZnP
package org.rut.util.algorithm.support; Lc{AB!Br
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import org.rut.util.algorithm.SortUtil; iXDG-_K
9{u=
/** cnu&!>8V
* @author treeroot IL*B@E8
* @since 2006-2-2 x3q^}sj%
* @version 1.0 y bhFDx
*/ ?2]fE[SqY
public class ImprovedMergeSort implements SortUtil.Sort { @7Ec(]yp
f/)Y {kS6
private static final int THRESHOLD = 10; QP(0
y98FEG#S}
/* "wgPPop
* (non-Javadoc) M+ +Dk7B
* }9^:(ty2A
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) M& ZKc
*/ $94lF~
public void sort(int[] data) { y\T$) XGV
int[] temp=new int[data.length]; tgF~5 o}?
mergeSort(data,temp,0,data.length-1); P T;{U<5
} 3"h*L8No
2Re8rcQQU
private void mergeSort(int[] data, int[] temp, int l, int r) { 2R\K!e
int i, j, k; 5i[O\@]5
int mid = (l + r) / 2; 9hzu!}~'I
if (l == r) Nf| 0O\+%y
return; 9^a|yyzL
if ((mid - l) >= THRESHOLD) Jh-yIk
mergeSort(data, temp, l, mid); E=I'$*C\D
else }>{R<[I!G
insertSort(data, l, mid - l + 1); &W\e 5X<A
if ((r - mid) > THRESHOLD) ?MH=8Cl1w
mergeSort(data, temp, mid + 1, r); `i`P}W!F
else w|f+OlPXq
insertSort(data, mid + 1, r - mid); "S;4hO
f)Qln[/
for (i = l; i <= mid; i++) { \@@G\\)er
temp = data; "yu{b]AU
} A[l )>:
for (j = 1; j <= r - mid; j++) { "9;
temp[r - j + 1] = data[j + mid]; 2+&;jgBP
} x{pj`'J)
int a = temp[l]; Ichg,d-M-K
int b = temp[r]; Zz0er|9]Q
for (i = l, j = r, k = l; k <= r; k++) { zK6w0
if (a < b) { YuhfPa
data[k] = temp[i++]; n*\o. :f
a = temp; Ae2N"%Ej
} else { .q2r!B
data[k] = temp[j--]; \'2rs152
b = temp[j]; {,Z|8@Sl%
} y3efie {J
} OLx;j+p
} QBa+xI_ J
*$9U/ d
/** WOO3z5 La
* @param data L(3&,!@
* @param l 6 wN*d 5
* @param i T6/P54S
*/ U6-47m0%
private void insertSort(int[] data, int start, int len) { .rBU"Rbo
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); Uh.swBC n
} X5o*8Bg4M
} q7CLxv &QG
} pLu5x<
} aVR!~hvFs
;MQl.?vj
堆排序： N:B<5l '
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package org.rut.util.algorithm.support; l;q]z
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import org.rut.util.algorithm.SortUtil; \`y:#N<c
6$OmOCA%
/** g%J\YRo
* @author treeroot 9,8/DW.K
* @since 2006-2-2 FRxR/3&
* @version 1.0 d./R;Z- I{
*/ jGouwta
public class HeapSort implements SortUtil.Sort{ Jj)J5S /
E]Mx<7;\.
/* (non-Javadoc) ICz:>4M-dn
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) "`;-5dg
*/ LGc8w>qE
public void sort(int[] data) { ]\rQ{No
MaxHeap h=new MaxHeap(); ]EK(k7nH
h.init(data); .c>6}:ye
for(int i=0;i h.remove(); 9 m8KDB[N
System.arraycopy(h.queue,1,data,0,data.length); * K$U[$s
} Ko&4{}/
1V]ws}XW
private static class MaxHeap{ GG%;~4#2
azFJ-0n@"
void init(int[] data){ Gd|kAC g
this.queue=new int[data.length+1]; f@`|2wG
for(int i=0;i queue[++size]=data; /SJ><
fixUp(size); N4x5!00
} 8pEA3py
} A,&711Y
[.&JQ
private int size=0; r],%:imGr
g(zeOS]q}
private int[] queue; yf*'=q
^W sgAyCB
public int get() { -\p&18K#
return queue[1]; Fah6 &a
} V]Te_ >E;w
J#Q>dC7
public void remove() { :^W}$7$T
SortUtil.swap(queue,1,size--); 4Q#{,y944
fixDown(1); yR~$i3Z*
} ~0+<-T
file://fixdown zf8SpQ2~
private void fixDown(int k) { CA|l| t^
int j; vJs6nVbK
while ((j = k << 1) <= size) { 'Ev[G6vo
if (j < size %26amp;%26amp; queue[j] j++; +\["HS7+'0
if (queue[k]>queue[j]) file://不用交换 `}`Qqv
break; PK|qiu-O&*
SortUtil.swap(queue,j,k); [PN2^
k = j; 6&]Z'nW0k
} VsTgK
} auGK2i
private void fixUp(int k) { BEax[=&W
while (k > 1) { \s[L=^!
int j = k >> 1; K. B\F)K
if (queue[j]>queue[k]) dfAw\7v/
break; l1kHFeq
SortUtil.swap(queue,j,k); db_Qt'>
k = j; }Tk:?U{
} :YRHO|
} eaO'|@;{~
iOfO+3'Z_U
} 5MG4S
!4<D^eh
} ^O<v'\!z-
:Z/\U*6~
SortUtil： ^O<'Qp,[:
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package org.rut.util.algorithm; h<M1q1)
t]Ln(r
import org.rut.util.algorithm.support.BubbleSort; 1.u^shc&|
import org.rut.util.algorithm.support.HeapSort; UUDbOxD^w
import org.rut.util.algorithm.support.ImprovedMergeSort; f6J]=9jU
import org.rut.util.algorithm.support.ImprovedQuickSort; /":/DwI'
import org.rut.util.algorithm.support.InsertSort; dn}EM7:Z
import org.rut.util.algorithm.support.MergeSort; tBkgn3w
import org.rut.util.algorithm.support.QuickSort; EZ>(}
import org.rut.util.algorithm.support.SelectionSort; 0t7)x8c
import org.rut.util.algorithm.support.ShellSort; N"<.v6Z
'4d4i
/** ysi=}+F.
* @author treeroot I++ Le%w
* @since 2006-2-2 wEq&O|Vj
* @version 1.0 #5h_{q4l
*/ L8n?F#q
public class SortUtil { PSv 5tQhm
public final static int INSERT = 1; l?IeZisX
public final static int BUBBLE = 2; 94O\M RQ*
public final static int SELECTION = 3; dh%O {t
public final static int SHELL = 4; @f"[*7Q`/
public final static int QUICK = 5; FO(QsR=\s
public final static int IMPROVED_QUICK = 6; -rYb{<;ST
public final static int MERGE = 7; L<oQKe7Q:
public final static int IMPROVED_MERGE = 8; T~$Eh6 D
public final static int HEAP = 9; _'Jjt9@S
L|<j/bP
public static void sort(int[] data) { b 1.S21
sort(data, IMPROVED_QUICK); L_9uwua.B~
} $DfK}CT
private static String[] name={ 117lhx].'
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" UrciCOQf
}; Bx\ o8k
/~s<@<1!X
private static Sort[] impl=new Sort[]{ '\d ldg#P
new InsertSort(), BUwL?
new BubbleSort(), 0\"#Xa+}8
new SelectionSort(), <uBRLe`)
new ShellSort(), huA?*fat
new QuickSort(), x6JV@wA&
new ImprovedQuickSort(), 2gklGDJD
new MergeSort(), ~9APc{"A
new ImprovedMergeSort(), jP/Vqe%%8
new HeapSort() XPf{R619
}; [?:MIl#!
!_3b#Caf
public static String toString(int algorithm){ ,]ySBAO
return name[algorithm-1]; \"RCJadK
} XXX y*/P
ld#x'/
public static void sort(int[] data, int algorithm) { {[:C_Up)f
impl[algorithm-1].sort(data); xMQ>,nZ
} At[Q0'jkc
|*w)]2Bl
public static interface Sort { rZ+4kf6S
public void sort(int[] data); 1yz%ud-l
} 9[X'9*,
.czUJyFms}
public static void swap(int[] data, int i, int j) { 2<OU)rVE4
int temp = data; -z. wAp
data = data[j]; CV^%'HIs?+
data[j] = temp; Dz$w6d
} 4x-,l1NMR
} K%L6UQ;