[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; !HXyvyDN
} -1ci.4F&
int i1=l; IcNZUZGE
int i2=mid+1; _&]Gw, ~/i
for(int cur=l;cur<=r;cur++){ ;h#Q!M&e#
if(i1==mid+1) vJ;0%;eu[!
data[cur]=temp[i2++]; }hXmK.['
else if(i2>r) G+m[W
data[cur]=temp[i1++]; VY@`)
else if(temp[i1] data[cur]=temp[i1++]; m=w #l>!
else 'a~F'FN$
data[cur]=temp[i2++]; JYLAu4s6
} C]3^:b+
} 6~6 vwp
X#X/P
} J~N!. i
}x_:v!G
改进后的归并排序: {H 3wL
]=Wq&~
package org.rut.util.algorithm.support; S5cs(}Bq
7uzc1}r
import org.rut.util.algorithm.SortUtil; K'[kl'
)W1[{?
/** wid
* @author treeroot eXkpU7w;
* @since 2006-2-2 &-Q_%eM^
* @version 1.0 &7eN EA
*/ 6?/f$,v
public class ImprovedMergeSort implements SortUtil.Sort { =$_kkVQ$
p;mV?B?oAQ
private static final int THRESHOLD = 10; BNixp[Hc
D$`$4mX@hP
/* _znpzr9H
* (non-Javadoc) e_FoNT
* 41+@!`z7
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) Yv[<c!\
*/ w4RtIDW:
public void sort(int[] data) { = jTC+0u
int[] temp=new int[data.length]; i1Y<[s
mergeSort(data,temp,0,data.length-1); }RQHsS
} )0=H)k0
~^o YPd52*
private void mergeSort(int[] data, int[] temp, int l, int r) { k?_uv
int i, j, k; k:&B b"
int mid = (l + r) / 2; ]'z 5%'
if (l == r) `a@YbuLd
return; ];QX&";Z
if ((mid - l) >= THRESHOLD) +t(Gt0+
mergeSort(data, temp, l, mid); !{A#\~,
else Jn20^YG
insertSort(data, l, mid - l + 1); 3+!G9T!
if ((r - mid) > THRESHOLD) rt\.|Hr4s
mergeSort(data, temp, mid + 1, r); +0:]KG!Zs.
else c >xHaA:V
insertSort(data, mid + 1, r - mid); BD mF+
P[H 4Yp
for (i = l; i <= mid; i++) { NHhKEx0Gtu
temp = data; Z{_YH7_
} Z|d+1i
for (j = 1; j <= r - mid; j++) { =3GgfU5k
temp[r - j + 1] = data[j + mid]; yz%o?%@
} MO|8A18B
int a = temp[l]; )ZfbM|
int b = temp[r]; l^__oam
for (i = l, j = r, k = l; k <= r; k++) { QL-E4]
if (a < b) { [`1@`5SL-
data[k] = temp[i++]; M[0NB2`Wp
a = temp; 9]|C$;kw@
} else { y!~ }7=
data[k] = temp[j--]; (^~~&/U_U$
b = temp[j]; +y 48.5
} mS+sh'VH
} ZD<e$PxxCd
} F2Mxcs*M
H)X&5E
/** y`pgJO
* @param data {7EpljH@
* @param l w%%*3[--X
* @param i J #;|P-pt
*/ H9[0-Ur5
private void insertSort(int[] data, int start, int len) { w|-m*v .
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); 4@Bl 1b[<
} Q|7m9~
} )p{,5"0u
} p }3$7CR/
} R^yh,
43!E>mq
堆排序： UDlM?r:f
TjjR% 3
package org.rut.util.algorithm.support; i`!>zl+D
$IJ"fs
import org.rut.util.algorithm.SortUtil; bDq<]h_7
xr31<4B
/** WFvVu3
* @author treeroot R'^J#"[
* @since 2006-2-2 eo&G@zwN
* @version 1.0 $kxu-
*/ j$P`/-N
public class HeapSort implements SortUtil.Sort{ $@~sO0q
L$@qEsO
/* (non-Javadoc) $Q=S`z=
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) ^g"%:4zO
*/ ZSLvr-,D
public void sort(int[] data) { *EFuK8 ;
MaxHeap h=new MaxHeap(); $ou/ Fn
h.init(data); 6U1_Wk?
for(int i=0;i h.remove(); !_-Uwg
System.arraycopy(h.queue,1,data,0,data.length); H@sM$8
} MwaRwk;
FW3uq^
private static class MaxHeap{ 3.h0
m~gcc
void init(int[] data){ X#ud_+6x
this.queue=new int[data.length+1]; B_"PFWwg
for(int i=0;i queue[++size]=data; %kuUQ%W1
fixUp(size); Pje1,B q
} _lfS"ae
} lr)9U7
4 i`FSO
private int size=0; }wC=p>zA
Tz7|OV_W$
private int[] queue; i4)]lWnd
O]t)`+%q
public int get() { <=%G%V_s
return queue[1]; LKg9{0Y:
} tYx>?~
!z]{zM%
public void remove() { %]o/p_<
SortUtil.swap(queue,1,size--); &jh17y
fixDown(1); Nh^q&[?
} {z@a{L:SC
file://fixdown `~h8D9G
private void fixDown(int k) { 8(* ze+8
int j; Ba76~-gK$
while ((j = k << 1) <= size) { 8o466m6/
if (j < size %26amp;%26amp; queue[j] j++; =h/61Bl3
if (queue[k]>queue[j]) file://不用交换 rE?B9BF3O
break; r>t|.=!
SortUtil.swap(queue,j,k); 07>D G#
k = j; -~ Dn^B1^
} I:YE6${k!
} !4$-.L)#
private void fixUp(int k) { dlMjy$/T
while (k > 1) { w^[:wzF0
int j = k >> 1; '_" S/X+v
if (queue[j]>queue[k]) .G>~xm0
break; t6~~s iQI'
SortUtil.swap(queue,j,k); b\H,+|iK
k = j; 9jllW[`2F
} \\Nt^j3qR
} 0RN7hpf&`
J5}?<Dd:
} Z*.rv t
Q>TNzh
} jV#1d8qm
WPPDvB
SortUtil： /`7G7pQ+
fdgjTX
package org.rut.util.algorithm; BipD8`a
eH%i8a
import org.rut.util.algorithm.support.BubbleSort; y_T%xWK5
import org.rut.util.algorithm.support.HeapSort; h@Ix9!?+
import org.rut.util.algorithm.support.ImprovedMergeSort; jgBJs^JgYG
import org.rut.util.algorithm.support.ImprovedQuickSort; n%6=w9.%c
import org.rut.util.algorithm.support.InsertSort; a4",BDx
import org.rut.util.algorithm.support.MergeSort; G'Uq595'-
import org.rut.util.algorithm.support.QuickSort; wYh]3
import org.rut.util.algorithm.support.SelectionSort; o)H| #9h5
import org.rut.util.algorithm.support.ShellSort; NFI~vkk'G
kWgrsN+Z
/** (mx}6A
* @author treeroot !ozHS_
* @since 2006-2-2 9 $zx<O
* @version 1.0 Jjh=zxR>
*/ VgMuX3=
public class SortUtil { 0kaMYV?
public final static int INSERT = 1; ^j<2s"S
public final static int BUBBLE = 2; }p*WH$!~
public final static int SELECTION = 3; /km0[M
public final static int SHELL = 4; LtK,_j
public final static int QUICK = 5; 7+rroCr"
public final static int IMPROVED_QUICK = 6; $^W|@et{ ]
public final static int MERGE = 7; >skl-f
public final static int IMPROVED_MERGE = 8; TIno"tc3
public final static int HEAP = 9; gKRlXVS
|j4;XaG)
public static void sort(int[] data) { _+ >V(,{G
sort(data, IMPROVED_QUICK); unyU|B
} \3O1o#=(
private static String[] name={ ,N8SP 'R
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" N^jr
}; ~2QD.(
hjp,v)#
private static Sort[] impl=new Sort[]{ wLo<gA6;
new InsertSort(), (>gb9n
new BubbleSort(), <M\#7.](
new SelectionSort(), @y,>cDg
new ShellSort(), YyC$\HH6
new QuickSort(), >FL%H=]
new ImprovedQuickSort(), Tlk!6A:
new MergeSort(), *++}ll6
new ImprovedMergeSort(), svMu85z
new HeapSort() 'Kd-A:K2g
}; dRBWJ/ 1T
e)|5P
public static String toString(int algorithm){ mEbj
return name[algorithm-1]; i \@a&tw
} D*ZswHT{y
"1hFx=W+\
public static void sort(int[] data, int algorithm) { 'w_Qs~6~{
impl[algorithm-1].sort(data); Q 2B
} RF'&.RtVa
~P"o_b6,k
public static interface Sort { A#]78lR
public void sort(int[] data); Xkf|^-n
} [vxHsY3z
ubl)$jZ:Q
public static void swap(int[] data, int i, int j) { _Pn 1n
int temp = data; (ZQ?1Qxo
data = data[j]; RHmT$^=
data[j] = temp; &cy<"y
} Kae-Y
} \ F)}brPc