[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; :,m)D775S
} BuTIJb+Q\
int i1=l; H|UL5<:]D
int i2=mid+1; %z~U@Mka
for(int cur=l;cur<=r;cur++){ ^d80\PXz
if(i1==mid+1) :eW~nI.Vc
data[cur]=temp[i2++]; hli10p$
else if(i2>r) #-T.@a1X
data[cur]=temp[i1++]; /BM1AV{s6
else if(temp[i1] data[cur]=temp[i1++]; Nz*sD^SJa
else |Vi&f5p,@
data[cur]=temp[i2++]; n#Roz5/U
} (:QQ7xc{}
} 4_+Pv6
K//T}-Uub
} VA'X!(Cv
,:4DN&<
改进后的归并排序: t1jlxK
ht)nx,e=
package org.rut.util.algorithm.support; m>ycN
s&hA
import org.rut.util.algorithm.SortUtil; S |>$0P4W(
7E`(8i
/** 5L}>+js2
* @author treeroot 5lnSa+_/f
* @since 2006-2-2 ulf/C%t,R
* @version 1.0 <zuE=0P~%
*/ ex\W]5
public class ImprovedMergeSort implements SortUtil.Sort { zpqGh
_}OJPahw
private static final int THRESHOLD = 10; GQ2PmnV+
@b\ S.
/* .vS6_
* (non-Javadoc) ]TgP!M&q
* y?n2`l7f
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) =`~Z@IbdI
*/ t3t0vWE<,
public void sort(int[] data) { i1I>RK
int[] temp=new int[data.length]; ~9r!m5ws
mergeSort(data,temp,0,data.length-1); GWhAjL/N
} $-Pqs ^g
W[E3P,XS
private void mergeSort(int[] data, int[] temp, int l, int r) { xwnoZ&h
int i, j, k; :KSor}t
int mid = (l + r) / 2; JhCkkw
if (l == r) N4mJU'_{
return; s;2/Nc
if ((mid - l) >= THRESHOLD) ~59`S#ax/l
mergeSort(data, temp, l, mid); M+;P?|a
else rA1r#ksQ
insertSort(data, l, mid - l + 1); u=;nU(]M '
if ((r - mid) > THRESHOLD) !?o$-+a|
mergeSort(data, temp, mid + 1, r); ^YR|WKY
else oD#>8Aws
insertSort(data, mid + 1, r - mid); @f{_=~+
Hp}
for (i = l; i <= mid; i++) { PKR $I
temp = data; ^2^|AXNES
} 5!F\h'E
for (j = 1; j <= r - mid; j++) { ZBmXaP[9
temp[r - j + 1] = data[j + mid]; #RM3^]h
} F|l`YtZZd
int a = temp[l]; =6L*!JP<
int b = temp[r]; `{U%[$<[W
for (i = l, j = r, k = l; k <= r; k++) { wD],{y
if (a < b) { nS+FX&_
data[k] = temp[i++]; *Z`XG_s5
a = temp; hiRR+`L%
} else { hyb +#R
data[k] = temp[j--]; ;DD>k bd
b = temp[j]; Q_aqX(ig
} >u5g?yzw
} 58&{5YpS
} E8-fW\!F
d)0LVa(
/** (+UmUx=
* @param data LR3`=Z9
* @param l ~#"7,rQp
* @param i )ojx_3j8
*/ Nxb\[
private void insertSort(int[] data, int start, int len) { _t|G@D{
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); +Cf0Y2*@hM
} YxEbg(Y
} qA/#IUi)1
} mT6q}``vtG
} /e|[SITe
8Y\OCwO
堆排序： HX3D*2v":
],\sRQbv&
package org.rut.util.algorithm.support; IAP/G5'Q
C[xJU6z
import org.rut.util.algorithm.SortUtil; 1t~FW-:
o)tKH@`vE
/** ,$h(fM8GC
* @author treeroot =!(*5\IM
* @since 2006-2-2 X_u@D;$
* @version 1.0 ;h9-}F
*/ r+{d!CHq}
public class HeapSort implements SortUtil.Sort{ 4L=$K2R2r
ZU-4})7uSB
/* (non-Javadoc) 3J'73)y
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) LAv:+o(m/
*/ "Su b4F`
public void sort(int[] data) { 4<T*i{[
MaxHeap h=new MaxHeap(); SqXy;S@
h.init(data); %'L].+$t
for(int i=0;i h.remove(); djsz!$
System.arraycopy(h.queue,1,data,0,data.length); "H>r-cyh
} jq57C}X}2
E3S%s
private static class MaxHeap{ |5=~(-I>@
GS ;HtUQ
void init(int[] data){ 'y4zBLY
this.queue=new int[data.length+1]; g.I(WJX0
for(int i=0;i queue[++size]=data; ]By0Xifew
fixUp(size); |*^8~u3J"
} uW}Hvj;0a*
} URYZV8=B~
q.=^iz&m
private int size=0; =oE_.ux\
{ExII<=6
private int[] queue; 9ZDVy7m\i-
FZe:co8Mu
public int get() { *.,"N}
return queue[1]; O87"[c`>
} { p1lae
J| SwQE~
public void remove() { 6OL41g'
SortUtil.swap(queue,1,size--); lSH ZV Fd
fixDown(1); XkPv*%Er8
} EKZA5J7kn
file://fixdown |',M_ e]
private void fixDown(int k) { m`hGDp3
int j; f).*NX
while ((j = k << 1) <= size) { CifA,[l34
if (j < size %26amp;%26amp; queue[j] j++; x3Nkp4=Xd
if (queue[k]>queue[j]) file://不用交换 4|[<e-W
break; U/ ?F:QD4
SortUtil.swap(queue,j,k); NWEhAj<w
k = j; UT3bd,,
} \un sh^M
} UTZ776`S&X
private void fixUp(int k) { `6&`wKz
while (k > 1) { ~Fy`>*
int j = k >> 1; P}HC(S1
if (queue[j]>queue[k]) Y!SE;N&
break; \V]t!mZ-}l
SortUtil.swap(queue,j,k); tY/En-&t
k = j; JC=dYP}
} di7A/B
} Da-u-_~
B@-|b
} hZcmP"wgC1
'gCJ[ce
} SOVjEo4'3
8tU>DJ}0
SortUtil： yahAD.Xuo@
H#OYw#L"u
package org.rut.util.algorithm; jDR')ascn
FJ{=2]x|
import org.rut.util.algorithm.support.BubbleSort; jz*0`9&_
import org.rut.util.algorithm.support.HeapSort; (~h7rAEc
import org.rut.util.algorithm.support.ImprovedMergeSort; k@S)j<
import org.rut.util.algorithm.support.ImprovedQuickSort; !X-9Ms}(d
import org.rut.util.algorithm.support.InsertSort; elu=9d];@
import org.rut.util.algorithm.support.MergeSort; iHPUmTus--
import org.rut.util.algorithm.support.QuickSort; 4Rx~s7l
import org.rut.util.algorithm.support.SelectionSort; <PX.l%
import org.rut.util.algorithm.support.ShellSort; +jUgx;u,
]DO&x+Rb
/** e,(a6X
* @author treeroot t<Ot|Ex
* @since 2006-2-2 42&v% ;R
* @version 1.0 ML=eL*}l
*/ zX98c
public class SortUtil { `?l3Ct*
public final static int INSERT = 1; 6D|p Qs
public final static int BUBBLE = 2; /hL\,x2
public final static int SELECTION = 3; 2`EVdl7B]
public final static int SHELL = 4; 1B 5:s,Oyj
public final static int QUICK = 5; tAERbiH
public final static int IMPROVED_QUICK = 6; '3^Q14`R
public final static int MERGE = 7; ioxbf6{
public final static int IMPROVED_MERGE = 8; 3A_G=WaED
public final static int HEAP = 9; \^jjK,OK
C0QM#"[
public static void sort(int[] data) { Q^L) Vp"
sort(data, IMPROVED_QUICK); 3f"C!l]Xu
} + ~"5!
private static String[] name={ \/ErPi=g
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" AotCX7T2T
}; 5Q W}nRCZ
ZWS2q4/S
private static Sort[] impl=new Sort[]{ 802H$P^ps
new InsertSort(), V C-d0E0
new BubbleSort(), =>qTNh*'
new SelectionSort(), A{N\)
new ShellSort(), eNbpwne
new QuickSort(), 2VA!&`I
new ImprovedQuickSort(), [KSH~:h:NR
new MergeSort(), )qv2)a!H
new ImprovedMergeSort(), Tg0CE60"
new HeapSort() yrnv!moc%t
}; `rlk|&T1
X3',vey
public static String toString(int algorithm){ dxK9:IX
return name[algorithm-1]; k=$AhT=e}n
} 1yMr~Fo
7VAJJv3
public static void sort(int[] data, int algorithm) { b5<okICD
impl[algorithm-1].sort(data); 22&;jpL'?
} lj4o#^lC
.1#kDM
public static interface Sort { iG#}`
public void sort(int[] data); vQ1 v#Z
} )"|||\Iv
2o4^
public static void swap(int[] data, int i, int j) { 2}vNSQvG
int temp = data; d$G}iJ8$mp
data = data[j]; 1y(UgEg
data[j] = temp; \F{:5,Du)
} :5b0np!
} ~E)fpGJ