[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; )+,jal^7
} 9`{2h$U
int i1=l; Rk[ * p
int i2=mid+1; ItPK
for(int cur=l;cur<=r;cur++){ 3= zQ U
if(i1==mid+1) *KH@u
data[cur]=temp[i2++]; eBIR*TZ):
else if(i2>r) "J{zfWr
data[cur]=temp[i1++]; a4RFn\4?
else if(temp[i1] data[cur]=temp[i1++]; b1]_e'jj
else Y`?X Fy:
data[cur]=temp[i2++]; Sg>0P*K@
} !y~b;>887
} j]"xck
!@Lc/'w
} CHit
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改进后的归并排序: 1<`7MN
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package org.rut.util.algorithm.support; ~J{[]wi
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import org.rut.util.algorithm.SortUtil; u/'sdt
UiZp-Y%ki
/** i(iP}:3
* @author treeroot ?(8%SPRk
* @since 2006-2-2 y?#J`o- O
* @version 1.0 ;S`-9}6
*/ (x0*(*A}
public class ImprovedMergeSort implements SortUtil.Sort { lkg*AAR?'
Z[S+L"0
private static final int THRESHOLD = 10; !o':\hex6
!gfhEzY
/* _C,@eu"9V
* (non-Javadoc) f\U&M,L\'
* @[lc0_b
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 7O{O')o!
*/ 89#0vG7m
public void sort(int[] data) { =e8L7_;
int[] temp=new int[data.length]; n o+tVm|
mergeSort(data,temp,0,data.length-1); )2Ru!l#
} S} Cp&}G{P
WAXts]=
private void mergeSort(int[] data, int[] temp, int l, int r) { Wd56B+
int i, j, k; 1 3`0d
int mid = (l + r) / 2; yUmsE-W
if (l == r) ]~S+nlyd<
return; tlLn
if ((mid - l) >= THRESHOLD) )z235}P
mergeSort(data, temp, l, mid); {a8^6dm*E
else ]j2v"n
insertSort(data, l, mid - l + 1); Pph8"`mv.m
if ((r - mid) > THRESHOLD) i6#]$B
mergeSort(data, temp, mid + 1, r); T) tZU?
else F*JvpI[7n
insertSort(data, mid + 1, r - mid); (2bZ]
!aw#',r8m
for (i = l; i <= mid; i++) { N^(lUba
temp = data; Vy^yV|`v
} 3u0<v%Qi
for (j = 1; j <= r - mid; j++) { /dJ)TW(Ir
temp[r - j + 1] = data[j + mid]; #t2UPLO~
} ]ZzG!7
int a = temp[l]; q6JW@GT
int b = temp[r]; Xu94v{u3
for (i = l, j = r, k = l; k <= r; k++) { DwY<qNWT
if (a < b) { ,o@~OTja*
data[k] = temp[i++]; 27E9NO=
a = temp; ,' rL'Ys
} else { \y H3Y
data[k] = temp[j--]; /E{dM2
b = temp[j]; 4[,B;7
} }#HTO:r
} ,mjfZ*N
} gr`Ar;
[}ZPg3Y
/** G</I%qM
* @param data g2{H^YUN$_
* @param l }{wTlR.]
* @param i p=_XMh`;
*/ Vx6?@R
private void insertSort(int[] data, int start, int len) { k/_8!^:'
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); |[owNV>
} 7XVzd]jH
} ocl47)
} yI.}3y{^5
} nJ*mEB
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堆排序： H/Ec^Lc+_
Bq~hV;9nf
package org.rut.util.algorithm.support; e@:P2(WWl
?l, X!o6
import org.rut.util.algorithm.SortUtil; qH h'l;.
0i*'N ch#i
/** v-;XyVx
* @author treeroot \%Ah^U)gS
* @since 2006-2-2 =qp}p'BYe
* @version 1.0 lQdnL.w$.4
*/ 6/mkJj+"
public class HeapSort implements SortUtil.Sort{ |ON&._`LH
UROj9COv
/* (non-Javadoc) ?H[5O+P[
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 8{G?92 {rN
*/ t$H':l0
public void sort(int[] data) { pdi=6<?bd
MaxHeap h=new MaxHeap(); 6/[Z178m
h.init(data); ^5;vx
for(int i=0;i h.remove(); )ew[ Ak|
System.arraycopy(h.queue,1,data,0,data.length); Foe>}6~{?
} dgco*TIGO
v;fJM5PA
private static class MaxHeap{ %9QMzz5
#5y9L
void init(int[] data){ &R'w-0k_
this.queue=new int[data.length+1]; ,l$NJt
for(int i=0;i queue[++size]=data; N4a`8dS|
fixUp(size); Z#4JA/c!
} (}{_]X|e
} :vYtMp
>,>;)B@J
private int size=0; aJ6#=G61l
s-C!uq
private int[] queue; cXk6e.Uz
oNuPP5d[]
public int get() { \6SMn6a4
return queue[1]; 6.U"_%
} )@Zc?Da
/`+Hwdk
public void remove() { k<YtoV
SortUtil.swap(queue,1,size--); 8ji^d1G,
fixDown(1); v}F4R $
} &gGs) $f[
file://fixdown 7_Ba3+9jpa
private void fixDown(int k) { (]3ERPn#y
int j; Hs"% S
while ((j = k << 1) <= size) { NqJ<!q)
if (j < size %26amp;%26amp; queue[j] j++; 3z,v#2
if (queue[k]>queue[j]) file://不用交换 X~v4"|a
break; 5c:'>
SortUtil.swap(queue,j,k); IjG5X[@
k = j; /~i.\^HX
} Gr5`1`8|
} ~@T+mHny
private void fixUp(int k) { X0y?<G1(a
while (k > 1) { i>Z|65
int j = k >> 1; Lw>-7)
if (queue[j]>queue[k]) LkJ$aW/
break; T&1-eq>l
SortUtil.swap(queue,j,k); {q&@nm40
k = j; @J-plJ4e
} ug^om{e-
} `OKo=e~,
CN.6E<9'kK
} e7@li<3>d
%{R_^Y8t
} |x &Z~y
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SortUtil： ?^LG hdR
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package org.rut.util.algorithm; bnijM/73
sS, zzx<
import org.rut.util.algorithm.support.BubbleSort; o"|O ]
import org.rut.util.algorithm.support.HeapSort; .aNO( /kO
import org.rut.util.algorithm.support.ImprovedMergeSort; 7w "sJ
import org.rut.util.algorithm.support.ImprovedQuickSort; `FUFK/7 w\
import org.rut.util.algorithm.support.InsertSort; DVObrL)znL
import org.rut.util.algorithm.support.MergeSort; S?*^>Y-e;
import org.rut.util.algorithm.support.QuickSort; ("_Q
import org.rut.util.algorithm.support.SelectionSort; !xkj30O(G
import org.rut.util.algorithm.support.ShellSort; /@&(P#h
`$J'UXtGc
/** /^w"' '
* @author treeroot a*Rz<08
* @since 2006-2-2 Ns'FH(:
* @version 1.0 l<:`~\#
*/ "E.\6sC
public class SortUtil { c Qld$
public final static int INSERT = 1; u\`/Nhn
public final static int BUBBLE = 2; ~6p5H}'H1
public final static int SELECTION = 3; 6|QTS|!
public final static int SHELL = 4; /sy-;JDnsu
public final static int QUICK = 5; ,# ]+HS^B
public final static int IMPROVED_QUICK = 6; $zdd=.!KiK
public final static int MERGE = 7; T`uDlo
public final static int IMPROVED_MERGE = 8; X$/E>I
public final static int HEAP = 9; j*XjY[
>f>V5L%1
public static void sort(int[] data) { StEQ -k
sort(data, IMPROVED_QUICK); !?jK1{E3
} y)P&]&"?
private static String[] name={ c8T/4hU MN
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" Truc[A.2Z
}; Zw+=ng.q?
O{~KR/
private static Sort[] impl=new Sort[]{ Fav?,Q,n
new InsertSort(), {Jrf/p9w
new BubbleSort(), d$}&nV/A)
new SelectionSort(), sTiYf
new ShellSort(), Q*gnAi&.#
new QuickSort(), D>P;Izb
new ImprovedQuickSort(), N8VVGPa
new MergeSort(), k!&:(]
new ImprovedMergeSort(), +vf:z?I8
new HeapSort() YUCC*t
}; JRq3>P
>zQNHSi
public static String toString(int algorithm){ Uls+n@\!
return name[algorithm-1]; DE%fF,Hk3
} MZ WmlJ
w^3|(F
public static void sort(int[] data, int algorithm) { ?b56AE
impl[algorithm-1].sort(data); p+$+MeBz
} &Y+e=1a+
QCWf.@n
public static interface Sort { 7SaiS_{:
public void sort(int[] data); WVOoHH
} 0Q7MM6
sdrWOq
public static void swap(int[] data, int i, int j) { rS4%$p"
int temp = data; (Ux[[
data = data[j]; [,rn3CA
data[j] = temp; (Izf L1
} %yfE7UPS]
} Y3k[~A7X