[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; z%WOv~8~
} 0,[-4m
int i1=l; R~XNF/QMl
int i2=mid+1; ;Q%3WD
for(int cur=l;cur<=r;cur++){ ;F>I+l_X
if(i1==mid+1) %Z#[{yuFs
data[cur]=temp[i2++]; ))#_@CwRr
else if(i2>r) IHf#P5y_
data[cur]=temp[i1++]; o|c"W}W
else if(temp[i1] data[cur]=temp[i1++]; 3x~AaC.j
else <fcw:Ae
data[cur]=temp[i2++]; <=!|U0YV
} ? 1b*9G%i
} #+PfrS=
8*yky
} 38(|a5
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改进后的归并排序: v`u>;S_
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package org.rut.util.algorithm.support; jTq@@y
H.: [# a
import org.rut.util.algorithm.SortUtil; 9IG3zMf
E 5bo60z
/** 3+# "4O
* @author treeroot d9uT*5f
* @since 2006-2-2 aQhr$aH
* @version 1.0 AZjj71UE
*/ cK+y3`.0
public class ImprovedMergeSort implements SortUtil.Sort { ]%/a'[
@V# wYt
private static final int THRESHOLD = 10; ZE>!]#,
)v?-[ oR
/* IpMZ{kJlv`
* (non-Javadoc) <S%kwS
* Qz?r4kR
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) *;C8g{
*/ Ty>g:#bogI
public void sort(int[] data) { M4TFWOC1
int[] temp=new int[data.length]; * E3 c--
mergeSort(data,temp,0,data.length-1); t#[u X?
} jo8;S?+<|?
`mTc
private void mergeSort(int[] data, int[] temp, int l, int r) { 4$!iw3N(
int i, j, k; L]HYk}oD.
int mid = (l + r) / 2; spt='!)4
if (l == r) ?*8HZ1m#
return; pu*vFwZ
if ((mid - l) >= THRESHOLD) RDu'N
mergeSort(data, temp, l, mid); tcxs%yWO1
else iy_\1jB0
insertSort(data, l, mid - l + 1); f~D> *<L4-
if ((r - mid) > THRESHOLD) pJ1Q~tI
mergeSort(data, temp, mid + 1, r); Z"fnjH
else )pXw 3Fo
insertSort(data, mid + 1, r - mid); %Sdzr!I7*
R'q:Fc
for (i = l; i <= mid; i++) { _('KNA~
temp = data; KGm"-W
} nC5
for (j = 1; j <= r - mid; j++) { a/wkc*}}/
temp[r - j + 1] = data[j + mid]; 5CsJghTw
} 6uijxia
int a = temp[l]; b]h]h1~hHH
int b = temp[r]; k(;c<Z{?1
for (i = l, j = r, k = l; k <= r; k++) { <IBzh_
if (a < b) { '.wyfSH@
data[k] = temp[i++]; ~=,|dGAa$
a = temp; "kjjq~l
} else { k+S 6)BQ7U
data[k] = temp[j--]; vx\h Njb
b = temp[j]; -'|pt,)
} THmX=K4=?
} {-]/r
} &:` 7
hsQrHs'k
/** f#p.=F$
* @param data {Z_Pry$6
* @param l D>O{>;y[
* @param i -hP@L ++D
*/ w%1B_PyDg
private void insertSort(int[] data, int start, int len) { ?6 "F.\O@
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); UP]J`\$o
} mdOF0b%-]
} +*Cg2`
} )]%GNdU
} BV&}(9z
t$=0 C
堆排序： AX%9k
d+|8({X]D8
package org.rut.util.algorithm.support; 1Ly?XNS
X!n-nms
import org.rut.util.algorithm.SortUtil; id.o)=
ujcNSX*
/** (iK0T.
* @author treeroot O4&/g-
* @since 2006-2-2 3Lq?Y7#KQp
* @version 1.0 0rT-8iJp4P
*/ M)#R_(Q5{
public class HeapSort implements SortUtil.Sort{ ,7pO-:*g
%&^F.JTt\
/* (non-Javadoc) 0X)'8N
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) #cQ[ vE)y
*/ `ge{KB;*n#
public void sort(int[] data) { }d)>pH
MaxHeap h=new MaxHeap(); b=QO^
h.init(data); *kxk@(lT?
for(int i=0;i h.remove(); (G"b)"Qum
System.arraycopy(h.queue,1,data,0,data.length); c*_I1}l
} Gr#p QE2;
Vd|5JA}<"
private static class MaxHeap{ A{;b^IK
SM:{o&S`
void init(int[] data){ vdNh25a<h
this.queue=new int[data.length+1]; y6;'?.Y1
for(int i=0;i queue[++size]=data; 1`m ~c
fixUp(size); ;'pEzz?k"
} 1(!!EcU_
} xN}P0
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private int size=0; L"tj DAV
tGd9Cs9D<
private int[] queue; qEf)TW(
cCU'~
public int get() { *Yvfp{B
return queue[1]; .Kq>/6
} ZH`6>:
o&?Tz*"l
public void remove() { \J-O b
SortUtil.swap(queue,1,size--); !HqIi@>8
fixDown(1); }k<b)I*A
} !hFb<
file://fixdown S,3e|-&$
private void fixDown(int k) { h.4;-&
int j; J*,Ed51&7
while ((j = k << 1) <= size) { +B_q? 6pR
if (j < size %26amp;%26amp; queue[j] j++; 60teD>Eh,
if (queue[k]>queue[j]) file://不用交换 Q_6./.GQ
break; \9i.dF
SortUtil.swap(queue,j,k); {*t'h?b
k = j; ED"5y
} L|6clGp
} <W/-[ M
private void fixUp(int k) { YIfPE{,
while (k > 1) { **-%5~
int j = k >> 1; \(Zdd \,
if (queue[j]>queue[k]) ,A =%!p+
break; V>A@Sw
SortUtil.swap(queue,j,k); * 2T&pX
k = j; w*#k&N[X
} Fdu0?H2TL
} Tr/wG
?8! 4!P%n
} ^67P(h
&!/L^Y*+
} V[+ Pb]
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SortUtil： ^bL.|vB
[JMz~~F
package org.rut.util.algorithm; y @Y@"y
4p>@UB&U
import org.rut.util.algorithm.support.BubbleSort; yql+N[
import org.rut.util.algorithm.support.HeapSort; ^o:0 Y}v=
import org.rut.util.algorithm.support.ImprovedMergeSort; pVt-7AgW
import org.rut.util.algorithm.support.ImprovedQuickSort; v]U[7 j
import org.rut.util.algorithm.support.InsertSort; 0>Ki([3
import org.rut.util.algorithm.support.MergeSort; t ~U&a9&Z
import org.rut.util.algorithm.support.QuickSort; ,O3"r;
import org.rut.util.algorithm.support.SelectionSort; i]hFiX
import org.rut.util.algorithm.support.ShellSort; }#EiL !Pv
fgn*3 pg
/** l+R-lsj
* @author treeroot 9N=Dls
* @since 2006-2-2 JZu7Fb]L9
* @version 1.0 b%,5B
*/ b4ORDU
public class SortUtil { U G^6I5
public final static int INSERT = 1; \+Qx}bS{
public final static int BUBBLE = 2; :$/lGIz
public final static int SELECTION = 3; nm %ka4
public final static int SHELL = 4; kX[I|Z=
public final static int QUICK = 5; (M.Sl
public final static int IMPROVED_QUICK = 6; 4y 582u6^
public final static int MERGE = 7; [^ 7^&/0
public final static int IMPROVED_MERGE = 8; 3iH!;`i
public final static int HEAP = 9; ,D ;`t
2lAuO!%
public static void sort(int[] data) { "St,4b
sort(data, IMPROVED_QUICK); s'~_pP
} Lk#u^|Eq7=
private static String[] name={ "-v9V7KCM
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" _a15R/S
}; x3wyIio*
vuDp_p*]S
private static Sort[] impl=new Sort[]{ 6sQ"go$}
new InsertSort(), quGb;)3
new BubbleSort(), ]#S1AvT
new SelectionSort(), cQ3Dk<GZ
new ShellSort(), DNki xE*
new QuickSort(), 9l{r&]
new ImprovedQuickSort(), ]C)PZZI='
new MergeSort(), {_^sR}%]F
new ImprovedMergeSort(), xOTm-Cm9L
new HeapSort() .%WbXs
}; =B<g_9d4
LsV!Sd
public static String toString(int algorithm){ 0p Lb<&
return name[algorithm-1]; "p2PZ)|
} OWOj|jM
%@H;6
public static void sort(int[] data, int algorithm) { z%*ZmF^K
impl[algorithm-1].sort(data); !i)?j@D
} jew?cnRmd
@*%5"~F
public static interface Sort { x:sTE u@
public void sort(int[] data); 'ky'GzX,
} lpSM p
UnW,|n8
public static void swap(int[] data, int i, int j) { U]e;=T:3
int temp = data; ? 76jz>;b
data = data[j]; T!v%NZj3
data[j] = temp; 3ufUB^@4v
} #<v3G)|aS
} uERc\TZ