[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; s<E_74q1
} I}n"6'*
int i1=l; b7aAP*$
int i2=mid+1; /P^@dL
for(int cur=l;cur<=r;cur++){ q<oA%yR
if(i1==mid+1) </bWFW~x
data[cur]=temp[i2++]; ~ZG>n{Q
else if(i2>r) K._1sOw'"Y
data[cur]=temp[i1++]; ,{J2i#g<
else if(temp[i1] data[cur]=temp[i1++]; _=UXNr8S
else EIEwrC
data[cur]=temp[i2++]; {4}Sl^kn*
} 6@H&S
} |8`}yRsQ
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} A"vI6ud>
- CM;sXq
改进后的归并排序: TCmWn$LeE
N%y%)MI8
package org.rut.util.algorithm.support; x~Se-#$
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import org.rut.util.algorithm.SortUtil; pm5Yc@D
qbqJ1^!6R
/** 8 Sl[&
* @author treeroot 0<nKB}9
* @since 2006-2-2 YX^{lD1Jj
* @version 1.0 (C6Y*Zm\
*/ xS,):R
public class ImprovedMergeSort implements SortUtil.Sort { d@C ;rzR
ZJy D/9y
private static final int THRESHOLD = 10; _qE2r^o"B
<u->hT
/* )I1LBvfQ
* (non-Javadoc) Y]Su<tgX?
* p7.@ez ;
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) Q>TaaGc
*/ <@F4{*
public void sort(int[] data) { OX8jCW
int[] temp=new int[data.length]; Q{>9Dg
mergeSort(data,temp,0,data.length-1); p&vQ*}
} ~{2@-qcm
FuEHO6nx
private void mergeSort(int[] data, int[] temp, int l, int r) { cTRCQ+W6:
int i, j, k; pC5-,Z;8
int mid = (l + r) / 2; `q$DNOrS
if (l == r) [jAhw>
return; cv#H
if ((mid - l) >= THRESHOLD) }pTw$B
mergeSort(data, temp, l, mid); dN\pe@#lKP
else $PrzJc
insertSort(data, l, mid - l + 1); hH@018+
if ((r - mid) > THRESHOLD) -z'@Mh|i6l
mergeSort(data, temp, mid + 1, r); vaTXu*
else M$! 0ikh
insertSort(data, mid + 1, r - mid); \+cQiN b@
ZJR{c5TE
for (i = l; i <= mid; i++) { "_H&p
temp = data; m1daOeZ]P
} Aqp3amW!
for (j = 1; j <= r - mid; j++) { T0tG1/O\
temp[r - j + 1] = data[j + mid]; RL)'m
} )}?dYk
int a = temp[l]; !my5-f>{(
int b = temp[r]; 9]AKNQq m
for (i = l, j = r, k = l; k <= r; k++) { Ir0er~f+z
if (a < b) { Ty@&s58a
data[k] = temp[i++]; :Bn\1\
a = temp; D+ jk0*bJ
} else { Ln`c DZSM
data[k] = temp[j--]; ^.-P]I]
b = temp[j]; rWbL_1Eq
} ?I7H ):
} d%]7:
} h[XGFz
9^c_^-8n<}
/** RKjA`cJ
* @param data @XmMD6{<
* @param l ?.4.Ubc\
* @param i 7[u&%
*/ -P.) 0d(
private void insertSort(int[] data, int start, int len) { g2iSc
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); (AwbZn*
} *&5G+d2
} !w C4ei`
} 8Oc*<^{#
} @]2cL
Crww\#E;
堆排序： fF *a/\h %
BA-n+WCWJ
package org.rut.util.algorithm.support; d]@9kG
#p_ ~L4iW
import org.rut.util.algorithm.SortUtil; >!a*wf~]
K0+J!-a]7
/** 8eLNKgc
* @author treeroot > }:6m
* @since 2006-2-2 }F1^gN&QF
* @version 1.0 zA+^4/M
*/ ?cpID8Z
public class HeapSort implements SortUtil.Sort{ nk-?$'i9q
?np`RA
/* (non-Javadoc) cFH,fj
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) R0m}I5Frs
*/ WcqYpPv
public void sort(int[] data) { >+$1 p_
MaxHeap h=new MaxHeap(); u9GQ)`7Z@
h.init(data); .@[+05Yw
for(int i=0;i h.remove(); qbT].,?!U
System.arraycopy(h.queue,1,data,0,data.length); M rVtxzH
} fY-{,+ `'
&}P62&
private static class MaxHeap{ !{ )H
M)|}Vn;!
void init(int[] data){ D.\p7 NJ
this.queue=new int[data.length+1]; -M/ny-;`}
for(int i=0;i queue[++size]=data; P+Hs6Q
fixUp(size); v,2{Vr
} xpSMbX{e
} y#T":jpR
!5{t1 oJ
private int size=0; z{tyB
.c BJA&/
private int[] queue; pX2 Ki^)]
a{H~>d<?
public int get() { o3uv"# C
return queue[1]; 2I#fwsb
} mNuv>GAb
mD0pqK
public void remove() { KU$.m3A>
SortUtil.swap(queue,1,size--); Q+uYr-
fixDown(1); J6f;dF^
} }l_) d
file://fixdown i[FBll-
private void fixDown(int k) { \y<n{"a
int j; ]Oe#S"-Oo
while ((j = k << 1) <= size) { Zcf?4{Kd?
if (j < size %26amp;%26amp; queue[j] j++; #X|'RL($
if (queue[k]>queue[j]) file://不用交换 H!s &]b
break; 1Z*-@%RX
SortUtil.swap(queue,j,k); #n0P'@d,r
k = j; `U?;9!|;6
} `cf&4Hn
} |\,e9U>
private void fixUp(int k) { }rOO[,?Y
while (k > 1) { k^ID
int j = k >> 1; lN^L#m*@
if (queue[j]>queue[k]) .|_+>){$w
break; rK"$@tc
SortUtil.swap(queue,j,k); F lbL`@4M
k = j; JQ0KXS Nr
} YK_a37E{F
} Bz]64/
F"9qBl~
} >.zk-`>-
S .1~#
} Hk.+1^?%
$~U_VQIA^
SortUtil： yyBfLPXZ
18|H
package org.rut.util.algorithm; oIf-s[uH
<5q:mG88
import org.rut.util.algorithm.support.BubbleSort; |\elM[G"g
import org.rut.util.algorithm.support.HeapSort; wUl}x)xo
import org.rut.util.algorithm.support.ImprovedMergeSort; 9jJ&QACn
import org.rut.util.algorithm.support.ImprovedQuickSort; x?f3XEA_
import org.rut.util.algorithm.support.InsertSort; (R Ttz
import org.rut.util.algorithm.support.MergeSort; ?p6+?\H
import org.rut.util.algorithm.support.QuickSort; 8Zwq:lV Q
import org.rut.util.algorithm.support.SelectionSort; dG6Mo76
import org.rut.util.algorithm.support.ShellSort; Mi:$<fEX
PcJ,Y\"[
/** #d__
* @author treeroot &Du!*V4A
* @since 2006-2-2 4Mnne'7
* @version 1.0 J]Uki*s
*/ \{abyi;
public class SortUtil { 2<|+h= &
public final static int INSERT = 1; du`],/ 6
public final static int BUBBLE = 2; V.:imj
public final static int SELECTION = 3; |'1[\<MM3
public final static int SHELL = 4; whxE[Xnv
public final static int QUICK = 5; :?yv0Iu
public final static int IMPROVED_QUICK = 6; !3d+"tL S
public final static int MERGE = 7; a o\+%s
public final static int IMPROVED_MERGE = 8; x|E$ f+
public final static int HEAP = 9; J/ <[irC
orEwP/L:
public static void sort(int[] data) { ?hsOhUs(5
sort(data, IMPROVED_QUICK); #*?5
} HJoPk'p%
private static String[] name={ { \r{$<s
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" Fi1gM}>py
}; Nluy]h &
6g( 2O[n.
private static Sort[] impl=new Sort[]{ ;^t<LhN:
new InsertSort(), n T\W|
new BubbleSort(), [o\O^d
new SelectionSort(), Hz*!c#
new ShellSort(), 1R1J/Z*V/
new QuickSort(), S9-K
new ImprovedQuickSort(), G#n27y nh
new MergeSort(), Bd)Qz(>rw
new ImprovedMergeSort(), ?%B%[u
new HeapSort() ZZ?=^g
}; e9"<.:&
d-39G*;1
public static String toString(int algorithm){ > : \lDz
return name[algorithm-1]; '$4o,GA8
} z8jQaI]j
tAc[r)xFw
public static void sort(int[] data, int algorithm) { ZuILDevMD
impl[algorithm-1].sort(data); u;;]S!:M
} ~Ui<y=d
g]z,*d
public static interface Sort { vU&gFEWg
public void sort(int[] data); [2.pZB
} 4k<4=E
MQw{^6Z>1
public static void swap(int[] data, int i, int j) { LW0't} z
int temp = data; )!){4c/
data = data[j]; sf7'8+wj>
data[j] = temp; d;V
} |"vqM)V$
} Y0aO/6