[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; !Km[Qw k-
} ?})A-$f ~
int i1=l; i>Q!5
int i2=mid+1; !D??Y^6bI
for(int cur=l;cur<=r;cur++){ Nz dN4+
if(i1==mid+1) >rd#,r
data[cur]=temp[i2++]; O4R\]B#Xu
else if(i2>r) /hl'T'RG
data[cur]=temp[i1++]; |7|S>h^
else if(temp[i1] data[cur]=temp[i1++]; Hl$W+e|tj
else TjUwe@&Rw
data[cur]=temp[i2++]; .?:*0
} lFzVd N
} =1IK"BA2?
B>53+GyMV
} ok:uTeJI
2&1mI>:F
改进后的归并排序: 2aYBcPFQh#
Scrj%h%[
package org.rut.util.algorithm.support; xo[o^go
E 2nz
import org.rut.util.algorithm.SortUtil; mLhM_=
igxO:]?
/** p'R<yB)V
* @author treeroot P 45Irir
* @since 2006-2-2 |+nmOi,z
* @version 1.0 N"70P/
*/ F3|^b{'zO
public class ImprovedMergeSort implements SortUtil.Sort { 4aXIRu%#7
_**Nlp*%
private static final int THRESHOLD = 10; 8 lggGt
gb_Y]U
/* 2v{WX
* (non-Javadoc) =QqH`.3
* &A0OYV3i.
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) z<%P"
*/ Nr4}x7
public void sort(int[] data) { #V>R#Oh}
int[] temp=new int[data.length]; Aw#<:6-
mergeSort(data,temp,0,data.length-1); _uIS[%4g
} RAW;ze*"
g|~px$<iY
private void mergeSort(int[] data, int[] temp, int l, int r) { X-["{
int i, j, k; J"r?F0
int mid = (l + r) / 2; (D>_O$o
if (l == r) V^_A{\GK
return; ]+D@E2E
if ((mid - l) >= THRESHOLD) cH5i420;aO
mergeSort(data, temp, l, mid); f[o~d`z
else ',EI[ ]+
insertSort(data, l, mid - l + 1); %Ig$:I(o
if ((r - mid) > THRESHOLD) ]oGd,v X
mergeSort(data, temp, mid + 1, r); <`nShP>vl
else :j&enP5R(q
insertSort(data, mid + 1, r - mid); @v)Z>xv
Gx C+lqH#
for (i = l; i <= mid; i++) { [^hW>O=@TN
temp = data; xM jn=\}
} @| z _&E
for (j = 1; j <= r - mid; j++) { ~c)&9'
temp[r - j + 1] = data[j + mid]; 26j<>>2
} M$K%e
int a = temp[l]; (`.# n3{
int b = temp[r]; pD{OB
for (i = l, j = r, k = l; k <= r; k++) { Q#g`D,:o%~
if (a < b) { 8V:;HY#
data[k] = temp[i++]; <C`bf$ak
a = temp; J M`w6}
} else { xi (@\A
data[k] = temp[j--]; -xtT,^<B
b = temp[j]; Df6i*Ko|
} #h;
} k|;a"56F
} JxVGzb`8
Vl_6nY;
/** gFaZ ._
* @param data D$ds[if$U,
* @param l Hv;xaT<}V
* @param i o}AXp@cqi
*/ !ku}vTe
private void insertSort(int[] data, int start, int len) { 'kd}vq#|
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); 63fYX"
} ;<+efYmyc
} zx#Gm=H4
} {5dVK
} m\>gOTpA4
07LyB\l~
堆排序： ~5HkDtI)
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package org.rut.util.algorithm.support; E+L7[
@\by`3*Q
import org.rut.util.algorithm.SortUtil; 2 }xePX9?
qk& F>6<9*
/** {hS!IOM
* @author treeroot Rpn<"LIoB:
* @since 2006-2-2 I}8e"#
* @version 1.0 ASXGM0t
*/ LHY7_"u#
public class HeapSort implements SortUtil.Sort{ $?GggP d
SEgw!2H
/* (non-Javadoc) h#0n2o#
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) d.&_j`\F
*/ T<]{:\*n
public void sort(int[] data) { lNe4e6
MaxHeap h=new MaxHeap(); | Y:`>2ev
h.init(data); UQ0!tFx
for(int i=0;i h.remove(); !Rv ;~f/2
System.arraycopy(h.queue,1,data,0,data.length); 5IU!BQU
} //@6w;P
";/]rwHa)
private static class MaxHeap{ Ct=bZW"j/
VEWW[T
void init(int[] data){ * F!B4go
this.queue=new int[data.length+1]; mE~WE+lw9
for(int i=0;i queue[++size]=data; MIJuJ]U}
fixUp(size); .tRm1&Qi
} /?81Ypt
} ;.h /D4
|V34;}\4
private int size=0; n.+*_c8k
@<W` w
private int[] queue; Iy)1(upM
,M.C]6YMr
public int get() { P-X|qVNK1Z
return queue[1]; I9kz)Q o
} {a[BhK'g
*R6lK&
public void remove() { I_1?J* b4k
SortUtil.swap(queue,1,size--); Y}[<KK}_
fixDown(1); hb3n- rO
} k+_>`Gre}
file://fixdown O*N:A[eW
private void fixDown(int k) { ? 2}%Rb39
int j; u7e$Mq
while ((j = k << 1) <= size) { VxY]0&sq
if (j < size %26amp;%26amp; queue[j] j++; 3,p!Fun:r
if (queue[k]>queue[j]) file://不用交换 Z `F[0-
break; 19fa7E<
SortUtil.swap(queue,j,k); EZ!! V~
k = j; =1[_#Moc6
} Zfs-M)
} 8~U ^G[!
private void fixUp(int k) { ?0~g1"Y-*K
while (k > 1) { ykQb;ZP8jh
int j = k >> 1; `}Y)l:G*g
if (queue[j]>queue[k]) AE~zmtW
break; )WvKRp r
SortUtil.swap(queue,j,k); }8#olZ/(q
k = j; *(x.egORd
} Oti;wf G7o
} WB:0}b0Gu
jr6 0;oK+
} ]t<=a6<P
&A s>Y,y
} 0YoKSo
hk !=ZE3
SortUtil： Yo%U{/e
mAlG}<
package org.rut.util.algorithm; fTEZ@#p
yl$Ko
import org.rut.util.algorithm.support.BubbleSort; 1ZFKLI`V
import org.rut.util.algorithm.support.HeapSort; !w7/G
import org.rut.util.algorithm.support.ImprovedMergeSort; r(^00hvH
import org.rut.util.algorithm.support.ImprovedQuickSort; |?KYY0
import org.rut.util.algorithm.support.InsertSort; D:k< , {
import org.rut.util.algorithm.support.MergeSort; K qJE?caw
import org.rut.util.algorithm.support.QuickSort; kw59`z Es
import org.rut.util.algorithm.support.SelectionSort; ,X/j6\VBO
import org.rut.util.algorithm.support.ShellSort; -#I]/7^
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/** Pz50etJ
* @author treeroot LB@<Q.b,U
* @since 2006-2-2 N+.Nu= +i2
* @version 1.0 feXo"J
*/ -O &>HA
public class SortUtil { ]fb@>1 jp
public final static int INSERT = 1; ?EUg B\
public final static int BUBBLE = 2; La6 9or
public final static int SELECTION = 3; rQzdHA
public final static int SHELL = 4; !v2/sq$G
public final static int QUICK = 5; aH;AGbp
public final static int IMPROVED_QUICK = 6; e\~nqKCb
public final static int MERGE = 7; huqtk4u
public final static int IMPROVED_MERGE = 8; A^}#
public final static int HEAP = 9; ql9n`?Q
~Jf(M^E
public static void sort(int[] data) { /BgXY}JC.
sort(data, IMPROVED_QUICK); 6EC',=)6R
} n]6'!Eo
private static String[] name={ OK4r)
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" ,LZA\XC
}; v RD/67
38sLyoG=i
private static Sort[] impl=new Sort[]{ @Yt394gA%\
new InsertSort(), I{w(`[Nxw*
new BubbleSort(), bR3Crz(9G
new SelectionSort(), i).Vu}W#S
new ShellSort(), x((u
new QuickSort(), Wm1dFf.>
new ImprovedQuickSort(), l|+$4 Nb2
new MergeSort(), O+&;,R:
new ImprovedMergeSort(), f5//?ek
new HeapSort() 6}Y==GPt
}; 7a>+ma\
:PV3J0pB~
public static String toString(int algorithm){ ~>)>hy)
return name[algorithm-1]; V|A)f@ Fs
} a6zWg7 PN
RQ0^ 1 R
public static void sort(int[] data, int algorithm) { A*BN
impl[algorithm-1].sort(data); b81^756
} `[$>S
!{,2uQXe
public static interface Sort { >Ec;6V e
public void sort(int[] data); ?9xWTVa8
} 0(o2<d7
J#:`'eEG
public static void swap(int[] data, int i, int j) { V9/2y9u
int temp = data; ,#N}Ni:
data = data[j]; ~NE`Ad.G
data[j] = temp; 6 JI8l`S
} @ddCVxd
} @D[+@N