[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; \myj Y
} N-NwGD{
int i1=l; )HU?7n.{
int i2=mid+1; ~\Ynih
for(int cur=l;cur<=r;cur++){ CtE".UlCA
if(i1==mid+1) zL_X?UmV
data[cur]=temp[i2++]; d~n+Ds)%F
else if(i2>r) 6\]-J*e>
data[cur]=temp[i1++]; Pjx9@i
else if(temp[i1] data[cur]=temp[i1++]; Gis'IX(
else ;ndg,05_
data[cur]=temp[i2++]; 6?t5g4q*nn
} E+Gea[c
} ).&$pXj
)pzXC
} {jv1hKTa
!"1bV [^
改进后的归并排序: hMDyE.X-
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package org.rut.util.algorithm.support; Jv7M[SJ#x
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import org.rut.util.algorithm.SortUtil; u!X2ju<
mq "p"iI
/** A#p@`|H#B
* @author treeroot 1%+0OmV&
* @since 2006-2-2 Llzowlfe
* @version 1.0 P"~B2__*
*/ :b ;5O3:B
public class ImprovedMergeSort implements SortUtil.Sort { QKF2_Acc
CBvBBt*
private static final int THRESHOLD = 10; LyQO_mT2
rDSt ~l
/* 0xjV*0?s
* (non-Javadoc) 2R_k$kHl
* TS%cTh'ItH
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) hgh1G7A&
*/ 0zfrx-'zN
public void sort(int[] data) { Le}q>>o;q
int[] temp=new int[data.length]; H37Z\xS
mergeSort(data,temp,0,data.length-1); UjfB+=7I{L
} sS0psw1
+\E\&^ZQ
private void mergeSort(int[] data, int[] temp, int l, int r) { {vU '>pp
int i, j, k; "5e]-u'
int mid = (l + r) / 2; YvU#)M_h
if (l == r) Oq.) 8E.
return; E+>;tLw3j
if ((mid - l) >= THRESHOLD) jALo;PDJ
mergeSort(data, temp, l, mid); `q/y|/v<
else 4$;fj1!Z:
insertSort(data, l, mid - l + 1); F )tNA?p)
if ((r - mid) > THRESHOLD) ^@ux
mergeSort(data, temp, mid + 1, r); }cf-r>WaR
else >0m-S :lk
insertSort(data, mid + 1, r - mid); .)o5o7H
rXaL1`t*
for (i = l; i <= mid; i++) { P_Zo}.{
temp = data; h(zi$V
} 1"e=Zqn$)
for (j = 1; j <= r - mid; j++) { ~7=,)Q
temp[r - j + 1] = data[j + mid]; 00Rk%QV
} ?K]k(ZV_+Y
int a = temp[l]; xNONf4I:6J
int b = temp[r]; 4C2 Dwj
for (i = l, j = r, k = l; k <= r; k++) { WH/a#F
if (a < b) { Ylf6-FbF
data[k] = temp[i++]; hVID~L$
a = temp; 5-g02g
} else { `ybZE+S.
data[k] = temp[j--]; iUO5hdOM
b = temp[j]; l%)XPb2$J
} cbIW>IbM
} E>[~"~x"pV
} ~C[,P\,
_,'UP>Si
/** l==T3u r
* @param data IEA[]eik>
* @param l h0gT/x
* @param i Z86[sQBg
*/ n1LS*-@
private void insertSort(int[] data, int start, int len) { %GIla*
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); N Lo>"<Xb
} Z,2uN!6
} (thzWr6;
} `?>OY&(
} hIw*dob
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堆排序： HgMDw/D(
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package org.rut.util.algorithm.support; 7j]@3D9[:p
;xRyONt
import org.rut.util.algorithm.SortUtil; 9DT}sCLz:B
I7TMv.
/** W}e5 4-lu
* @author treeroot `j2z=5
* @since 2006-2-2 D/)xe:
* @version 1.0 _Ih~'Y Fd
*/ abK/!m[q
public class HeapSort implements SortUtil.Sort{ B^OhL!*tI
fGxa~Unx
/* (non-Javadoc) WT0U)x( m5
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) F |GWYw'%
*/ =l\D7s
public void sort(int[] data) { lyT~>.?{
MaxHeap h=new MaxHeap(); 5n"'M&Ce
h.init(data); Q'rG' |
for(int i=0;i h.remove(); U@*z#T#"m
System.arraycopy(h.queue,1,data,0,data.length); Z2ZS5a
} c2y5[L7?
*L!R4;ubE
private static class MaxHeap{ I7}[%(~Sf/
:jhJpm1Xq
void init(int[] data){ [`:\(( 8
this.queue=new int[data.length+1]; ]__M*
for(int i=0;i queue[++size]=data; +[>m`XTq
fixUp(size); KUp lN1Sy
} R` N-^x
} v<c8qg
7[K$os5al
private int size=0; >yaz
<?I~ +
private int[] queue; @-W)(9kZ|
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public int get() { FPu,sz8
return queue[1]; {>~|xW
} LsLsSV
j#Y8h5r
public void remove() { p_}OtS;
SortUtil.swap(queue,1,size--); kmuF*0Bjk
fixDown(1); , n+dB2\
} \ET7
file://fixdown Xf.SJ8G
private void fixDown(int k) { .<tb*6rX>
int j; e}Db-7B_~
while ((j = k << 1) <= size) { x&7!m
if (j < size %26amp;%26amp; queue[j] j++; YUc&X^O
if (queue[k]>queue[j]) file://不用交换 yDHH05Yl
break; n0cqM}P@;!
SortUtil.swap(queue,j,k); k<AnTboa
k = j; K)&AR*Tc
} X${k
} iptzVr#b[
private void fixUp(int k) { +H+OYQ>^
while (k > 1) { QupCr/Hs
int j = k >> 1; zHyM@*Gf(
if (queue[j]>queue[k]) g<tr |n
break; WJl&Vyl2FL
SortUtil.swap(queue,j,k); &t`l,]PQ=6
k = j; }2G'3msx
} mgg/i@(
} KecRjon~
Yz[^?M%(D
} `rQA9;Tn2
/SjA;c!.
} \|Us/_h
](B+ilr
SortUtil： xMU4Av[{
JZ9w!)U
package org.rut.util.algorithm; ]^E<e!z={$
/u5MAl.<[
import org.rut.util.algorithm.support.BubbleSort; y&UcTE2;%(
import org.rut.util.algorithm.support.HeapSort; :<!a.%=
import org.rut.util.algorithm.support.ImprovedMergeSort; TU^UR}=lP
import org.rut.util.algorithm.support.ImprovedQuickSort; A-qdTJP
import org.rut.util.algorithm.support.InsertSort; pm@Mlwg`1
import org.rut.util.algorithm.support.MergeSort; KP%A0
import org.rut.util.algorithm.support.QuickSort; ~CQsv`
import org.rut.util.algorithm.support.SelectionSort; /n&w|b%
import org.rut.util.algorithm.support.ShellSort; G D$o|l]\
up#W"`"
/** zXIVHC,"{
* @author treeroot DFcgUEq
* @since 2006-2-2 EH=[!iW;
* @version 1.0 t[Qf|#g
*/ 2ntL7F<ow
public class SortUtil { !Qy%sY
public final static int INSERT = 1; Il`35~a
public final static int BUBBLE = 2; `$Z:j;F
public final static int SELECTION = 3; M2l0x @|
public final static int SHELL = 4; 9'Le}`Gf
public final static int QUICK = 5; s#hIzt
public final static int IMPROVED_QUICK = 6; ;=fOyg
public final static int MERGE = 7; Op0n.\>
public final static int IMPROVED_MERGE = 8; LhKaqR{
public final static int HEAP = 9; *c3(,Bmw
bnIl@0Y
public static void sort(int[] data) { H,u{zU')
sort(data, IMPROVED_QUICK); @y]ek/
} ;SnpD)x@)
private static String[] name={ r$T\@oTL
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" XYj!nx{k,
}; 5$$Yce=k
e ?sMOBPlv
private static Sort[] impl=new Sort[]{ l1HMH?0|
new InsertSort(), lY -2e>
new BubbleSort(), !?)ky `S3
new SelectionSort(), 4&N#d;ErC
new ShellSort(), ",O |uL
new QuickSort(), wIQ~a
new ImprovedQuickSort(), xP/?E
new MergeSort(), VW&EdrR,S
new ImprovedMergeSort(), )cP&c=
new HeapSort() S1$lNB
}; KTtB!4by
8L1vtYz
public static String toString(int algorithm){ Ec'Hlsgh&T
return name[algorithm-1]; X(_xOU)V
} O2{~Q{p
ddK\q!0
public static void sort(int[] data, int algorithm) { iq1HA.X(
impl[algorithm-1].sort(data); .bYZkO:oy
} &X3G;x2;
p+7G
public static interface Sort { ;z2\ Q$
public void sort(int[] data); ?qC6p|H
} vbBNXy/
X<8?>#
public static void swap(int[] data, int i, int j) { kx{LY`pY
int temp = data; w :nYsuF
data = data[j]; d?ru8
data[j] = temp; PaD6||1F
} b!p]\B!
} Sy@)Q[A